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As filed with the Securities and Exchange Commission on May 1, 2003
Registration No. 333-          



SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549


FORM S-3
REGISTRATION STATEMENT
Under
The Securities Act of 1933


MICRON TECHNOLOGY, INC.
(Exact name of Registrant as specified in its charter)

DELAWARE
(State or other jurisdiction of
incorporation or organization)
  75-1618004
(I.R.S. Employer
Identification Number)

8000 South Federal Way
P.O. Box 6
Boise, Idaho 83707-0006
(208) 368-4000
(Address, including zip code, and telephone number, including area code, of Registrant's principal executive offices)


W.G. Stover, Jr.
Vice President of Finance and Chief Financial Officer
Micron Technology, Inc.
8000 South Federal Way
Boise, Idaho 83707-0006
(208) 368-4000
(Name, address, including zip code, and telephone number, including area code, of agent for service)


Copies to:
John A. Fore, Esq.
Michael A. Occhiolini, Esq.
Wilson Sonsini Goodrich & Rosati
Professional Corporation
650 Page Mill Road
Palo Alto, CA 94304
(650) 493-9300


Approximate date of commencement of proposed sale to the public: From time to time after the effective date of this Registration Statement.

        If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box. o

        If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box. ý

        If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. o

        If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. o

        If delivery of the prospectus is expected to be made pursuant to Rule 434, please check the following box. o


CALCULATION OF REGISTRATION FEE


 
Title of Securities to be Registered
  Amount to be Registered
  Proposed Maximum Offering Price Per Security(1)
  Proposed Maximum Aggregate Offering Price
  Amount of Registration Fee
 

 
2.50% Convertible Subordinated Notes due February 1, 2010   $ 632,500,000   100 % $ 632,500,000   $ 51,170  

 
Common Stock, $0.10 par value     53,656,240 (2)   (2)     (2)     (3)

 
(1)
Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457 of the Securities Act of 1933, as amended.

(2)
Includes 53,656,240 shares of common stock issuable upon conversion of the notes at the initial conversion price of approximately $11.79 per share of common stock. Pursuant to Rule 416 under the Securities Act, such number of shares of common stock registered hereby shall include an indeterminate number of shares of common stock that may be issued in connection with a stock split, stock dividend, recapitalization or similar event.

(3)
Pursuant to Rule 457(i), there is no additional filing fee with respect to the shares of common stock issuable upon conversion of the notes because no additional consideration will be received in connection with the exercise of the conversion privilege.

        The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the Registration Statement shall become effective on such date as the Commission acting pursuant to said Section 8(a) may determine.




The information in this prospectus is not complete and may be changed. These securities may not be sold until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

SUBJECT TO COMPLETION, DATED May 1, 2003

MICRON TECHNOLOGY, INC.

$632,500,000

(aggregate principal amount)

2.50% Convertible Subordinated Notes Due February 1, 2010, and
the Common Stock Issuable Upon Conversion of the Notes

        We issued the notes in a private placement in February 2003. This prospectus will be used by selling securityholders to resell their notes and the common stock issuable upon conversion of their notes. We will not receive any proceeds from this offering.

        The notes are issued only in denominations of $1,000 and integral multiples of $1,000 and mature on February 1, 2010. You may convert the notes into shares of our common stock at an initial conversion rate of 84.8320 shares for each $1,000 principal amount of notes, which is equal to an initial conversion price of approximately $11.79 per share.

        We will pay interest on the notes on February 1 and August 1 of each year, beginning on August 1, 2003. The notes are subordinated.

        We may redeem some or all of the notes at the times and at the prices specified in this prospectus. In the event of a change in control, you may require us to repurchase any notes held by you.

        The notes are not listed on any securities exchange or included in any automated quotation system. The notes are eligible for trading on The PORTALSM Market. Our common stock is listed on the New York Stock Exchange under the symbol "MU." On April 30, 2003, the last reported sale price for our common stock as reported by Bloomberg, L.P. was $8.50 per share.

        Investing in the securities involves a high degree of risk. See "Risk Factors" beginning on page 6.


        Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is                        , 2003


        You should rely only on the information contained in or incorporated by reference in this prospectus or a prospectus supplement or amendment. We have not authorized anyone else to provide you with different information. We are not making an offer of these securities in any state where the offer is not permitted. You should not assume the information in this prospectus or a prospectus supplement or amendment is accurate as of any date other than the date on the front of the documents.


TABLE OF CONTENTS

 
  Page
INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE   ii

SUMMARY

 

1

THE OFFERING

 

2

RATIO OF EARNINGS TO FIXED CHARGES

 

5

RISK FACTORS

 

6

DISCLOSURE REGARDING FORWARD-LOOKING STATEMENTS

 

15

USE OF PROCEEDS

 

15

CALL SPREAD OPTIONS

 

15

DESCRIPTION OF THE NOTES

 

16

DESCRIPTION OF CAPITAL STOCK

 

33

UNITED STATES FEDERAL INCOME TAX CONSEQUENCES

 

34

SELLING SECURITYHOLDERS

 

40

PLAN OF DISTRIBUTION

 

43

VALIDITY OF COMMON STOCK

 

45

EXPERTS

 

45

AVAILABLE INFORMATION

 

45

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INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

        The following documents filed by us with the Securities and Exchange Commission, or the "SEC," are incorporated by reference into, and are attached to and made part of, this prospectus:

        You may request a copy of these filings, at no cost, upon writing or telephoning us at the following:

    Micron Technology, Inc.
8000 South Federal Way
Boise, Idaho 83716-9632
Attn: General Counsel
(208) 368-4000

        We are also incorporating by reference all documents filed with the SEC by us pursuant to sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934 subsequent to the date of this prospectus and prior to termination of the offering made hereby. Any statement contained in a document incorporated or deemed to be incorporated by reference in this prospectus shall be deemed to be modified or superseded for purposes of this prospectus to the extent that a statement contained in any other subsequently filed document which also is or is deemed to be incorporated by reference in this prospectus modifies or supersedes such statement.

        Our common stock is quoted on the New York Stock Exchange. You may inspect reports and other information concerning us at the offices of the New York Stock Exchange, 11 Wall Street, New York, New York 10005.

ii



SUMMARY

        Because this is a summary, it may not contain all the information that may be important to you. You should read this entire prospectus and documents incorporated by reference before making an investment decision. Documents incorporated by reference form an integral part of this prospectus. Prospective investors should consider carefully the information set forth in this prospectus under the heading "Risk Factors." When used in this prospectus, unless otherwise stated, the terms "we," "our" and "us" refer to Micron Technology, Inc. and its subsidiaries, unless otherwise stated or the context otherwise requires.

Micron Technology, Inc.

        We principally design, develop, manufacture and market semiconductor products.

        Dynamic Random Access Memory, or DRAM, is our primary semiconductor product constituting approximately 95% of our net sales for the three months ended February 27, 2003. DRAMs are high density, low-cost-per-bit, random access memory components that store digital information and provide high-speed storage and retrieval of data. DRAMs are the most widely used semiconductor memory component in computer systems. In addition to our DRAM memory products, we also produce Flash Memory products. Our products include:

        We are a leading global manufacturer of semiconductor products with manufacturing facilities located in the United States, Italy, Japan, Singapore and Scotland. Our manufacturing facilities operate 24 hours per day, 7 days per week. We develop leading-edge manufacturing process technology primarily at our research and development wafer fabrication facility in Boise, Idaho. The process technology is then deployed to our various fabrication facilities, including our joint venture, TECH Semiconductor Singapore, Pte. Ltd., or TECH, located in Singapore.

        Our products are sold primarily through computing, networking and telecommunications, and imaging groups. Our products are marketed primarily through our own direct sales force and are also offered through independent sales representatives, distributors and our retail sales division, Crucial Technology.


        We were originally incorporated in Idaho in 1978. In 1984, we reincorporated in Delaware. Our executive offices are located at 8000 South Federal Way, Boise, Idaho 83716-9632, and our telephone number is (208) 368-4000. Our website is located on the internet at www.micron.com. The information contained or incorporated in our website is not part of this prospectus.

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THE OFFERING

        The following is a brief summary of some of the terms of the Notes offered for resale in this prospectus. For a more complete description of the terms of the Notes, see the section entitled "Description of the Note" in this prospectus.

Securities Offered   $632,500,000 aggregate principal amount of 2.50% Convertible Subordinated Notes due February 1, 2010.

Offering Price

 

100% of the principal amount plus accrued interest, if any.

Interest

 

We will pay interest on the notes semi-annually on February 1 and August 1 of each year, commencing August 1, 2003.

Conversion

 

You may convert the notes into shares of our common stock at a conversion rate of 84.8320 shares of common stock per $1,000 principal amount of notes. This is equivalent to a conversion price of approximately $11.79 per share. The conversion rate is subject to adjustment in certain events. You may convert your notes at the above conversion rate at any time prior to the close of business on the maturity date, unless we have previously redeemed or repurchased the notes. If your notes are called for redemption or submitted for repurchase, you will be entitled to convert your notes up to the close of business on the business day immediately preceding the date fixed for redemption or repurchase, as the case may be.

Subordination

 

The notes are subordinated to our existing and future senior debt. The notes are also effectively subordinated in right of payment to all indebtedness and other liabilities of our subsidiaries. As of February 27, 2003, we had approximately $434 million of outstanding senior debt, and our subsidiaries had approximately $391 million of outstanding indebtedness and other liabilities, excluding intercompany liabilities and approximately $190 million of liabilities guaranteed by us and included in senior debt. Neither we nor our subsidiaries will be restricted under the indenture from incurring senior debt or other additional indebtedness.

 

 

 

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Global Note; Book-entry System

 

The notes will be issued only in fully registered form without interest coupons and in minimum denominations of $1,000. The notes will be evidenced by one or more global notes deposited with the trustee for the notes, as custodian for DTC. Beneficial interests in the global note will be shown on, and transfers of those beneficial interest can only be made through, records maintained by DTC and its participants.

Optional Redemption by Micron

 

We may redeem the notes, at our option, in whole or in part, on or after February 6, 2006, at the redemption prices set forth in this prospectus plus accrued and unpaid interest to, but excluding, the redemption date. We will therefore be required to make at least six interest payments on the notes before being able to redeem any notes.

Repurchase at Option of Holders Upon a Change in Control

 

Upon a change in control (as defined below), you will have the right to require us to repurchase all or part of your notes at 100% of the principal amount of the notes, plus accrued and unpaid interest to, but excluding, the repurchase date. We can pay the repurchase price, at our option, in:

 

 

• cash,
• shares of our common stock, or
• other applicable securities if we are not the surviving corporation of the change in control transaction or transactions.

 

 

If we pay the repurchase price in our common stock or other applicable securities, our common stock or other applicable securities will be valued at 95% of its average closing prices for the five trading days immediately preceding the second trading day prior to the repurchase date and a shelf registration statement covering our common stock or other applicable securities must be effective.

Events of Default

 

You may be able to require us to pay all outstanding amounts due under the notes:

 

 

 

3



 

 

• if we fail to pay principal on the notes;
• if we fail to pay any interest, including any liquidated damages, for 30 days;
• if we fail to adequately notify you of a change in control;
• if we fail to perform any other obligation in the indenture and that failure continues for 60 days after adequate notice;
• if we fail to pay any debt under any bond, debenture, note or other debt for borrowed money in excess of $50 million at final maturity, whether at stated maturity or upon acceleration of such debt; and
• in events of bankruptcy, insolvency or reorganization.

Listing of Common Stock

 

Our common stock is quoted on the New York Stock Exchange under the symbol "MU."

Use of Proceeds

 

We will not receive any of the proceeds from the sale by any selling securityholder of the notes or the underlying common stock into which the notes may be converted.

Risk Factors

        You should carefully consider the information set forth in the section entitled "Risk Factors" beginning on page 5 of this prospectus and all other information provided to you in this prospectus and the documents incorporated by reference in deciding whether to invest in the notes.

4



RATIO OF EARNINGS TO FIXED CHARGES

        The ratio of earnings to fixed charges for each of the periods indicated is as follows:

 
  Fiscal Year Ended
  Three Months Ended
 
  September 3,
1998

  September 2,
1999

  August 31,
2000

  August 30,
2001

  August 29,
2002

  February 28,
2002

  February 27,
2003

Ratio of earnings to fixed charges(1)       21.3x        

(1)
For the purpose of calculating such ratios, "earnings" consist of income from continuing operations before income taxes plus fixed charges and "fixed charges" consist of interest expense (net of capitalized portion), capitalized interest, amortization of debt discount and the portion of rental expense representative of interest expense. Earnings before fixed charges were inadequate to cover total fixed charges by $254.0 million, $52.5 million, $954.8 million and $998.5 million for the fiscal years ended September 3, 1998, September 2, 1999, August 30, 2001 and August 29, 2002, respectively, and by $50.7 million and $601.6 million for the three months ended February 28, 2002, and February 27, 2003, respectively.

5



RISK FACTORS

        Please keep these risk factors in mind when you read "forward-looking" statements elsewhere in this prospectus and in the documents incorporated herein by reference. These are statements that relate to our expectations for future events and time periods. Generally, the words, "anticipate," "expect," "intend" and similar expressions identify forward-looking statements. Forward-looking statements involve risks and uncertainties, and future events and circumstances could differ significantly from those anticipated in the forward-looking statements.

        You should carefully consider the risks described below before deciding whether to purchase our notes or the common stock into which they may be converted. If any of the following risks actually occur, our business financial condition and operating results could be materially adversely affected, the trading price of our securities could decline, and you might lose all or part of your investment.

Risks Related to Micron

If average selling prices for our semiconductor products do not exceed our costs, we expect to incur losses.

        Average selling prices for our semiconductor products decreased by 3% in the second quarter of 2003 as compared to the first quarter of 2003 and decreased by 12% in the first quarter of 2003 as compared to the fourth quarter of 2002. In five of the last six fiscal years, we experienced the following decreases in average selling prices for our semiconductor products: 53% in 2002, 60% in 2001, 37% in 1999, 60% in 1998 and 75% in 1997. We are unable to predict pricing conditions for any future period.

        In recent quarters, average selling prices for our semiconductor products have been below our manufacturing costs. If average selling prices are below costs in future periods, we expect to continue to incur losses on product sales and for our results of operations, cash flows and financial condition to be adversely affected. To the extent the estimated market value of products held in finished goods and work in process inventories at a quarter end date is below the cost of these products, we recognize a charge against operations to write down the carrying value of inventory to market value.

If average selling prices of semiconductor products do not improve, we may not be able to generate sufficient cash flows to fund our operations and make adequate capital investments.

        Our cash flows from operations depend primarily on the volume of semiconductor memory sold, average selling prices and per megabit manufacturing costs. In recent quarters, average selling prices have been below our manufacturing costs. To develop new product and process technologies, support future growth, achieve operating efficiencies and maintain product quality, we must make significant capital investments in facilities and capital equipment, research and development, and product and process technology. Weak market conditions for the semiconductor industry have led us to significantly reduce actual and projected expenditures. If average selling prices do not improve, we may not be able to generate sufficient cash flows to fund our operations or make adequate capital investments. We have historically utilized external sources of financing. However, depending on general market and economic conditions or other factors, we may not be able to access capital markets for sufficient funds on acceptable terms.

Increased worldwide DRAM production or lack of demand for semiconductor products could lead to further declines in average selling prices for DRAM or limit our ability to sell our products.

        The transition to smaller geometries and 300 mm wafers in the industry (which is expected to occur within the next five years) could, depending upon the rate of transition, lead to a significant increase in the worldwide supply of DRAM. Increases in worldwide supply of DRAM also result from DRAM fab capacity expansions, either by way of new facilities, increased capacity utilization or

6



reallocation of other semiconductor production to DRAM production. Some of our competitors may receive government support to withstand downturns in the semiconductor memory market and to invest in technology resulting in increased worldwide supply. Increases in worldwide supply of DRAM, if not offset by increases in demand, could lead to further declines in average selling prices for our products and adversely affect our results of operations, cash flows and financial condition. In addition, if a lack of demand for semiconductor products limits our ability to sell our inventory, our liquidity and financial position could be adversely affected.

Depressed pricing for semiconductor memory products may lead to future inventory write-downs.

        We recorded inventory write-downs of $197 million and $91 million in the second and first quarter of 2003, respectively, and we recorded inventory write-downs totaling $376 million in 2002 and $727 million in 2001 as a result of the significant decreases in average selling prices for our semiconductor memory products. To the extent the estimated market value of products held in finished goods and work in process inventories at a quarter end date is below the cost of these products, we recognize a charge to cost of goods sold to write down the carrying value of inventory to market value.

If the growth rate of either PCs sold or the amount of semiconductor memory included in each PC decreases, sales of our semiconductor products could decrease.

        We are dependent on the PC market as most of the semiconductor products we sell are used in PCs or peripheral products. DRAMs are the most widely used semiconductor components in PCs. In recent years, the growth rate of PCs sold has slowed or declined. If we experience a sustained reduction in the growth rate of either PCs sold or the average amount of semiconductor memory included in each PC, sales of our semiconductor products built for those markets could decrease, and our results of operations, cash flows and financial condition could be adversely affected.

The semiconductor memory industry is highly competitive.

        We face intense competition from a number of companies, some of which are large corporations or conglomerates (e.g. Samsung Semiconductor, Inc.) that may have greater resources to withstand downturns in the semiconductor memory market, invest in technology and capitalize on growth opportunities.

Current economic and political conditions may harm our business.

        Global economic conditions and the effects of military or terrorist actions may cause significant disruptions to worldwide commerce. If these disruptions result in delays or cancellations of customer orders, a decrease in corporate spending on information technology or our inability to effectively market, manufacture or ship our products, our results of operations, cash flows and financial condition could be adversely affected. In addition, our ability to raise capital for capital expenditures, research and development and ongoing operations is dependent upon ready access to capital markets. During times of adverse global economic and political conditions, accessibility to capital markets could decrease. If we are unable to access the capital markets over an extended period of time, we may be unable to make capital expenditures, fully carry out our research and development efforts and fund operations, which could materially adversely affect our results of operations, cash flows and financial condition.

If any one of our major PC customers significantly reduces its purchases of DRAM from us, our results of operations, cash flows and financial condition could be adversely affected.

        Approximately 85% of our sales of semiconductor products for the second quarter of 2003 was to the computer market. Aggregate sales to two of our PC customers approximated 29% of our net sales

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in the second quarter of 2003. If any one of our major PC customers significantly reduces its purchases of DRAM from us, our results of operations, cash flows and financial condition could be adversely affected.

If our TECH joint venture experiences financial difficulty, or if our supply of semiconductor products from TECH is disrupted, our results of operations, cash flows and financial condition could be adversely affected.

        TECH supplied approximately 30% of the total megabits of memory produced by the Company in the second quarter and first six months of 2003 and supplied approximately 20% in the second quarter and first six months of 2002. We have agreements to purchase all of the production from TECH subject to specific terms and conditions. Any reduction in supply could adversely affect our results of operations, cash flows and financial condition. Subsequent to the end of the second quarter of 2003, on March 13, 2003, TECH entered into a new $250 million term loan credit facility the proceeds of which were used to refinance amounts borrowed under its former facility. In connection therewith, the $50 million pledged by the Company as cash collateral with respect to TECH's previous credit facility was re-pledged and supplemented by an additional $50 million by the Company. With respect to this $100 million in cash collateral, certain shareholders in TECH have agreed in the event all or a portion of the cash collateral is required to be used to meet TECH's principal loan payments, to indemnify the Company for approximately one-half of such amounts. As of February 27, 2003, we had remaining unamortized costs of $73 million in intangible assets relating to the supply arrangement to purchase product from TECH. In the event that our supply of semiconductor products from TECH is reduced or eliminated, we may be required to write off part or all of these assets and our results of operations could be adversely affected.

We may be unable to maintain or reduce per megabit manufacturing costs at the same rate as we have in the past.

        Historically, we have decreased per megabit manufacturing costs through improvements in our manufacturing processes, including reducing the die size of our existing products. In future periods, we may be unable to maintain our per megabit manufacturing costs or reduce costs at historical rates. Our ability to maintain or reduce per megabit manufacturing costs in future periods may be affected by:

If we are unable to respond to customer demand for diversified semiconductor memory products or are unable to do so in a cost-effective manner, we may lose market share and our results of operations may be adversely affected.

        In recent periods, the semiconductor memory market has become relatively segmented, with diverse memory needs being driven by the different requirements of desktop and notebook PCs, servers, workstations, handheld devices, and communications, industrial and other applications that demand specific memory solutions. We currently offer customers a variety of memory products including DDR SDRAM, SDRAM and Flash. In addition, we are designing and developing other semiconductor products, including DDRII SDRAM, GDDRII SDRAM, reduced latency DRAM ("RLDRAM"), CellularRAM and CMOS imaging sensors.

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        We need to dedicate significant resources to product design and development to respond to customer demand for the continued diversification of semiconductor products. If we are unable to invest sufficient resources to meet the diverse memory needs of customers, we may lose market share. In addition, as we diversify our product lines we may encounter difficulties penetrating certain markets, particularly markets where we do not have existing customers. If we are unable to respond to customer demand for market diversification in a cost-effective manner, our results of operations may be adversely affected.

An adverse determination that our products and processes infringe the intellectual property rights of others could adversely affect our results of operations, cash flows and financial condition.

        As is typical in the semiconductor and other high technology industries, from time to time, others have asserted, and may in the future assert, that our products or processes infringe their product or process technology rights. We are currently engaged in litigation with Rambus, Inc. ("Rambus") relating to certain of Rambus' patents and certain of our claims and defenses. On August 28, 2000, we filed a declaratory judgment action against Rambus in the U.S. District Court for the District of Delaware. On February 1, 2001, we amended our complaint. Pursuant to our amended complaint, we are seeking (1) relief under the federal antitrust laws for violations by Rambus of Section 2 of the Sherman Act; (2) a declaratory judgment that (a) certain Rambus patents are not infringed, are invalid and/or are unenforceable, (b) we have an implied license to Rambus' patents, and (c) Rambus is estopped from enforcing its patents against us because of its conduct in the Joint Electron Device Engineering Council standards setting body; and (3) damages and declaratory relief for Rambus' breach of contract, fraud, deceptive trade practices, negligent misrepresentation, and conduct requiring the application of equitable estoppel. On February 15, 2001, Rambus filed an answer and counterclaim denying that we are entitled to relief and has alleged willful infringement by us of eight Rambus patents. In addition, Rambus has filed lawsuits against the Company in Italy, Germany, France and the United Kingdom alleging infringement of certain Rambus European patents. We are unable to predict the outcome of the Rambus suits or of other assertions of infringement that have been made, or may in the future be made against us. A court determination that our manufacturing processes or products infringe the product or process rights of others could result in significant liability and/or require us to make material changes to our products and/or manufacturing processes. Any of the foregoing results could have a material adverse effect on our business, results of operations or financial condition.

        We have a number of patent and intellectual property license agreements. Some of these license agreements require us to make one time or periodic payments. We may need to obtain additional patent licenses or renew existing license agreements in the future. We are unable to predict whether these license agreements can be obtained or renewed on acceptable terms.

Allegations of anticompetitive practices.

        On June 17, 2002, we received a grand jury subpoena from the U.S. District Court for the Northern District of California seeking information regarding an investigation by the Antitrust Division of the Department of Justice (the "DOJ") into possible antitrust violations in the "Dynamic Random Access Memory" or "DRAM" industry. We are cooperating fully and actively with the DOJ in its investigation. Subsequent to the commencement of the DOJ investigation, 24 purported class action lawsuits were filed against us and other DRAM suppliers in various federal and state courts alleging violations of the Federal Sherman Antitrust Act or California's Cartwright Antitrust Act and Unfair Competition Law relating to the sale and pricing of DRAM products. The complaints seek treble damages for the alleged damages sustained by purported class members, in addition to restitution, costs and attorneys' fees, as well as an injunction against the allegedly unlawful conduct. There can be no assurance that additional purported class action lawsuits will not be filed against us, either within or without the United States. We are unable to predict the outcome of these suits. Based upon our

9



analysis of the claims made and the nature of the DRAM industry, we believe that class treatment of these cases is not appropriate and that any purported injury alleged by plaintiffs would be more appropriately resolved on a customer-by-customer basis. We cannot assure you that the final resolution of these alleged violations of federal or state antitrust laws will not result in significant liability and not have a material adverse effect on our results of operations and financial condition.

New product development may not be successful.

        We are developing new products that complement our traditional memory products or leverage their underlying design or process technology. We anticipate expending significant resources for new semiconductor product development over the next several years. There can be no assurance that our product development efforts will be successful, that we will be able to cost-effectively manufacture these new products or that we will be able to successfully market these products.

If we are unable to successfully transition our operations to 300 mm wafer processing at the appropriate time, our results of operations, cash flows and financial condition could be adversely affected.

        We have in the past reduced our per megabit manufacturing costs by transitioning to larger wafer sizes. By transitioning to larger wafers, we should be able to produce significantly more die for each wafer, resulting in substantially reduced costs for each die. Our transition to 300 mm wafer processing across a significant portion of our operations will require us to make substantial capital investments, which will depend on our ability to generate funds from operations or to obtain additional funds from external sources. We may also experience disruptions in manufacturing operations and reduced yields during our transition to larger wafer sizes. If we are unable to successfully transition to 300 mm wafer processing at the appropriate time, we could be at a cost disadvantage with respect to our competitors and our results of operations, cash flows and financial condition could be adversely affected.

We face risks associated with our international sales and operations that could adversely affect our results of operations, cash flows and financial condition.

        Sales to customers outside the United States approximated 56% of our consolidated net sales in the second quarter of 2003. In addition, we have or support manufacturing operations in Italy, Japan, Scotland and Singapore. Our international sales and operations are subject to a variety of risks, including:

        These factors may adversely affect our results of operations, cash flows and financial condition.

If our manufacturing process is disrupted, our results of operations, cash flows and financial condition could be adversely affected.

        We manufacture products using highly complex processes that require technologically advanced equipment and continuous modification to improve yields and performance. Difficulties in the

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manufacturing process can reduce yields or disrupt production and may increase our per megabit manufacturing costs. From time to time, we have experienced minor disruptions in our manufacturing process as a result of power outages. If production at a fabrication facility is disrupted for any reason, manufacturing yields may be adversely affected or we may be unable to meet our customers' requirements and they may purchase products from other suppliers. This could result in a significant increase in manufacturing costs, loss of revenues or damage to customer relationships.

Disruptions in our supply of raw materials could adversely affect our results of operations, cash flows and financial position.

        Our operations require raw materials that meet exacting standards. We generally have multiple sources of supply for our raw materials. However, only a limited number of suppliers are capable of delivering certain raw materials that meet our standards. Various factors could reduce the availability of raw materials such as silicon wafers, photomasks, chemicals, gases, lead frames and molding compound. Shortages may occur from time to time in the future. In addition, any transportation problems could delay our receipt of raw materials. Lead times for the supply of raw materials have been extended in the past. If our supply of raw materials is disrupted or our lead times extended, our results of operations, cash flows and financial condition could be adversely affected.

We may not realize the expected benefits of our restructure program.

        In the second quarter of 2003, we announced a series of cost-reduction initiatives including the shutdown of our 200 mm fabrication line in Virginia, the discontinuance of certain product lines and the 10% reduction in worldwide workforce. We expect to substantially complete the restructure plan by the end of 2003 and expect to realize annualized cost savings in excess of $250 million as a result of this restructure plan. However, we may not realize the expected benefits of our restructure program.

Products that do not meet specifications or that contain, or are perceived by our customers to contain, defects or that are otherwise incompatible with end uses could impose significant costs on us or otherwise adversely affect our results of operations, cash flows and financial position.

        Because the design and production process for semiconductor memory is highly complex, it is possible that we may produce products that do not comply with customer specifications, contain defects or are otherwise incompatible with end uses. If, despite design review, quality control and product qualification procedures, problems with nonconforming, defective or incompatible products occur after we have shipped such products, we could be adversely affected in the following ways:

We expect to make future acquisitions where advisable, which involve numerous risks.

        We expect to make future acquisitions where we believe it is advisable to enhance our market position. Acquisitions involve numerous risks, including:

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        Mergers and acquisitions of high-technology companies are inherently risky, and future acquisitions may not be successful and may materially adversely affect our results of operations, cash flows or financial condition.

Risks Related to the Notes

The notes rank below our senior debt and liabilities of our subsidiaries, and we may be unable to repay our obligations under the notes.

        The notes are unsecured and subordinated in right of payment in full to all of our existing and future senior debt. Because the notes are subordinated to our senior debt, in the event of (1) our liquidation or insolvency, (2) a payment default on our senior debt, (3) a covenant default on our designated senior debt (as defined in "Description of the Notes—Subordination"), or (4) acceleration of the notes due to an event of default, we will make payments on the notes only after our senior debt has been paid in full. As a result, we may not have sufficient assets remaining to pay any or all amounts due on the notes.

        The notes are obligations exclusively of Micron. Since Micron's operations are partially conducted through subsidiaries, our cash flow and our ability to service our debt, including the notes, are partially dependent upon the earnings of our subsidiaries and the distribution of those earnings to us. Our subsidiaries are separate legal entities and have no obligation to make any payments on the notes or make any funds available for payment on the notes. The payment of dividends and the making of loans and advances to us by our subsidiaries may be subject to statutory or contractual restrictions and are dependent upon the earnings of our subsidiaries. Our right to receive assets of any of our subsidiaries upon their liquidation or reorganization, and your right to participate in these assets, will be effectively subordinated to the claims of that subsidiary's creditors. Consequently, the notes will be effectively subordinated to all liabilities, including trade payables, of any of our subsidiaries and any subsidiaries that we may in the future acquire or establish, except to the extent that we are recognized as a creditor of such subsidiary, in which case our claims would still be subordinate to any security interests in the assets of such subsidiary and any debt of such subsidiary senior to that held by us.

        As of February 27, 2003, we had approximately $434 million of senior debt outstanding, and our subsidiaries had approximately $391 million of indebtedness and other liabilities, including trade payables but excluding intercompany liabilities, and approximately $190 million of liabilities guaranteed by us and included in senior debt, as to which the notes are subordinate. Neither we nor our subsidiaries are prohibited or limited from incurring debt or acting as guarantors of debt for others in whom we or our subsidiaries may have an interest under the indenture. Our ability to pay our obligations on the notes could be adversely affected by our or our subsidiaries' incurrence of additional indebtedness or other liabilities. We and our subsidiaries may from time to time incur additional indebtedness and other liabilities, including senior debt. See "Description of the Notes—Subordination."

Limitation on repurchase of notes in the event of a change in control.

        Our ability to repurchase notes upon the occurrence of a change in control is subject to limitations. We may not have sufficient financial resources or the ability to arrange financing to pay the repurchase price for all the notes delivered by holders seeking to exercise their repurchase right. Although we may elect, subject to satisfaction of certain conditions, to pay the repurchase price for the notes in common stock or other applicable securities, our ability to repurchase the notes in cash may be limited or prohibited by the terms of any future borrowing arrangements existing at the time of a

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change in control. Any failure by us to repurchase the notes upon a change in control would result in an event of default under the indenture, whether or not the repurchase is permitted by the subordination provisions of the indenture. Any such default may, in turn, cause a default under our senior debt. Moreover, the occurrence of a change in control could result in an event of default under the terms of our then existing senior debt. As a result, any repurchase of the notes may be prohibited until the senior debt is paid in full. See "Description of the Notes—Repurchase at Option of Holders Upon a Change in Control."

        Furthermore, because the sale price of our common stock will be determined prior to the applicable repurchase date, you will bear the market risk that our common stock will decline in value between the date the sale price is calculated and the repurchase date.

Changes in our credit rating could adversely affect the price of the notes.

        Credit agencies continually revise their ratings for companies they follow, including us. The credit rating agencies also evaluate our industry as a whole and may change their credit ratings for us based on their overall view of our industry or specific view of us. We cannot be sure that credit rating agencies will maintain their ratings on us. For example, on January 17, 2003, Moody's Investors Service lowered our issuer rating to Ba3 from Ba1. A further negative change in our ratings could have an adverse effect on the price of the notes.

Absence of public market for the notes.

        There is no established public trading market for the notes. We cannot assure you that a market for the notes will develop and continue or that the market price of the notes will not decline. Various factors, such as changes in prevailing interest rates or changes in perceptions of our creditworthiness could cause the market price of the notes to fluctuate significantly. The trading price of the notes will also be significantly affected by the market price of our common stock, which could be subject to wide fluctuations in response to a variety of factors. The notes will not be listed on any securities exchange or included for quotation in any automated dealer system and will only be traded on the over-the-counter market.

We significantly increased our leverage as a result of the sale of the notes.

        In connection with the sale of the notes, we incurred $633 million of indebtedness. Our principal and interest payment obligations increased significantly as a result of issuing the notes. The degree to which we are leveraged could materially and adversely affect our ability to obtain financing for working capital, acquisitions or other purposes and could make us more vulnerable to industry downturns and competitive pressures. Our ability to meet our debt service obligations will be dependent upon our future performance, which will be subject to financial, business and other factors affecting our operations, many of which are beyond our control. In addition, certain of our equipment financing arrangements contain covenants that, among other things, require us to maintain certain financial ratios, which, together with our increased leverage, could adversely affect our financial flexibility.

Our stock price has been volatile and our stock price and the price of the notes may fluctuate in the future.

        In the past, our common stock price has fluctuated significantly. This could continue as we or our competitors announce new products, demand by our customers fluctuates, conditions in our industry change, average selling prices for semiconductor memory fluctuate or investors change their sentiment toward technology stocks. Fluctuations of our common stock price may also cause fluctuations in market prices for our notes.

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        In addition, fluctuations in our stock price and our price-to-earnings multiple may have made our stock attractive to momentum, hedge or day-trading investors who often shift funds into and out of stocks rapidly, exacerbating price fluctuations in either direction.

Call spread options may affect the value of the notes.

        In conjunction with the issuance of the notes, we entered into an arrangement with affiliates of Goldman, Sachs & Co. and Lehman Brothers Inc. to limit the market risks associated with our obligations under the notes by purchasing call spread options from them. In connection with these arrangements, our transaction counterparties may have taken, and may continue to take, positions in our common stock in secondary market transactions and enter into various derivative transactions. These counterparties may modify their hedge positions from time to time prior to conversion, redemption or maturity of the notes by purchasing and selling shares of our common stock, other of our securities or other instruments. Such activity may affect the market price of our equity and equity-linked securities.

        For example, in connection with any repayment or call for redemption of the notes, we anticipate that our counterparties would sell shares of our common stock to be in a position to settle the call spread options. These sales could create downward pressure on the market price of our equity and equity-linked securities.

Securities we issue to fund our operations could dilute your ownership.

        We may decide to raise additional funds through public or private debt or equity financing to fund our operations. If we raise funds by issuing equity securities, the percentage ownership of current shareholders will be reduced and the new equity securities may have rights prior to those of the common stock issuable upon conversion of the notes. We may not obtain sufficient financing on terms that are favorable to you or us. We may delay, limit or eliminate some or all of our proposed or existing operations if adequate funds are not available.

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DISCLOSURE REGARDING FORWARD-LOOKING STATEMENTS

        In addition to the other information contained or incorporated by reference in this prospectus, you should carefully consider the risk factors disclosed in this prospectus when evaluating an investment in the notes or the common stock issuable upon conversion of the notes. This prospectus includes "forward-looking statements" within the meaning of Section 27A of the Securities Act, and Section 21E of the Exchange Act. All statements other than statements of historical fact are "forward-looking statements" for purposes of these provisions, including any projections of earnings, revenues or other financial items, any statements of the plans and objectives of management for future operations, any statements concerning proposed new products or services, any statements regarding future economic conditions or performance, and any statement of assumptions underlying any of the foregoing. In some cases, forward-looking statements can be identified by the use of terminology such as "may," "will," "expects," "intends," "plans," "anticipates," "estimates," "potential," or "continue" or the negative thereof or other comparable terminology. There can be no assurance that such expectations or any of the forward-looking statements will prove to be correct, and actual results could differ materially from these projected or assumed in the forward-looking statements. Our future financial condition and results of operations, as well as any forward-looking statements, are subject to inherent risks and uncertainties, including but not limited to the risk factors set forth below and those described elsewhere in this prospectus. All forward-looking statements and reasons why results may differ included in this prospectus are made as of the date hereof, and we assume no obligation to update any such forward-looking statement or reason why actual results might differ.


USE OF PROCEEDS

        We will not receive any of the proceeds from the sale by any selling securityholder of the notes or the underlying common stock into which the notes may be converted.


CALL SPREAD OPTIONS

        Concurrent with the issuance of the notes in the initial private placement, we purchased from Lehman Brothers Finance S.A., an affiliate of Lehman Brothers Inc., and from Goldman Sachs Financial Markets, L.P., an affiliate of Goldman, Sachs & Co. (such affiliates the "option sellers"), call spread options on our common stock (collectively, the "call spread options"). In the aggregate the call spread options cover approximately 53.7 million shares of our common stock, which is the number of shares that are initially issuable upon conversion of the notes in full. The call spread options have a lower strike price of $11.79, a higher strike price of $18.19, may be settled at our option either in cash or net shares and expire on January 29, 2008. The maximum benefit to us from the call spread options is a cash amount of $343.4 million or 18.9 million shares. The call spread options therefore have the potential of limiting the dilution associated with the conversion of the notes from 53.7 million shares to as few as 34.8 million shares, depending upon market conditions. The call spread option transactions, including fees and costs of $109.1 million, are accounted for as capital transactions.

        The call spread options are designed to mitigate dilution from conversion of the notes in the event that the market price per share of our common stock upon exercise of the call spread options is greater than $11.79. Settlement of the call spread options in cash on January 29, 2008, the expiration date, would result in us receiving an amount ranging from zero if the market price per share of our common stock is at or below $11.79 to a maximum of $343.4 million if the market price per share of our common stock were at or above $18.19. Settlement of the call spread options in net shares on the expiration date would result in us receiving a number of shares, not to exceed 18.9 million shares, of our common stock with a value equal to the amount otherwise receivable on cash settlement. Should there be an early unwind of the call spread options the amount of cash or net shares potentially received by us will be dependent upon then existing overall market conditions, and on our stock price, the volatility of our stock and the amount of time remaining on the call spread options.

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DESCRIPTION OF THE NOTES

        The notes were issued under an indenture between us and Wells Fargo Bank Minnesota, National Association, as trustee. The notes, the indenture and the registration rights agreement are governed by New York law. Because this section is a summary, it does not describe every aspect of the notes, the indenture and the registration rights agreement. The following summaries of certain provisions of the notes, the indenture and the registration rights agreement do not purport to be complete and are subject to, and are qualified in their entirety by reference to, the detailed provision of the notes, the indenture and the registration rights agreement, including the definitions therein of certain terms. You may request copies of these documents at the address set forth above under the caption "Summary."

General

        The notes are general, unsecured, subordinated obligations of Micron Technology, Inc. The notes are limited to $632,500,000 aggregate principal amount. The notes will mature on February 1, 2010, and will be payable at a price of 100% of the principal amount of the notes. The notes bear interest at 2.50% from February 4, 2003. We will pay interest semi-annually on February 1 and August 1 of each year, commencing on August 1, 2003.

        The notes are our unsecured obligations and will be subordinated to all of our present and future senior debt. The notes are also effectively subordinated in right of payment to all indebtedness and liabilities of our subsidiaries. Neither we nor our subsidiaries are limited or restricted from incurring additional indebtedness or providing guarantees of indebtedness under the indenture. The indenture does not impose any financial or similar covenants on us or our subsidiaries.

        You may convert the notes into shares of our common stock initially at the conversion rate of 84.8320 shares per $1,000 principal amount of notes, at any time before the close of business on the maturity date, unless the notes have been previously redeemed or repurchased. Holders of notes called for redemption or submitted for repurchase upon a change in control will be entitled to convert the notes up to and including the business day immediately preceding the date fixed for redemption or repurchase, as the case may be. The conversion rate may be adjusted as described below under "—Conversion Rights."

        We may redeem the notes at our option at any time on or after February 6, 2006, in whole or in part, at the redemption prices set forth below under "—Optional Redemption by Micron," plus accrued and unpaid interest to, but excluding, the redemption date. We will therefore be required to make at least six interest payments on the notes before being able to redeem the notes. If we experience a change in control, you will have the right to require us to repurchase your notes as described below under "—Repurchase at Option of Holders Upon a Change in Control."

Form, Denomination, Transfer, Exchange and Book-Entry Procedures

        The notes are issued:

        The notes are evidenced by one or more global notes, which have been deposited with the trustee as custodian for DTC and registered in the name of Cede & Co., as nominee of DTC. Except as set forth below, record ownership of the global note may be transferred, in whole or in part, only to another nominee of DTC or to a successor of DTC or its nominee.

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        The global note will not be registered in the name of any person, or exchanged for notes that are registered in the name of any person, other than DTC or its nominee unless either of the following occurs:

        In those circumstances, DTC will determine in whose names any securities issued in exchange for the global note will be registered.

        DTC or its nominee is considered the sole owner and holder of the global note for all purposes, and as a result:

        The laws of some jurisdictions require that certain kinds of purchasers, such as insurance companies, can only own securities in definitive certificated form. These laws may limit your ability to transfer your beneficial interests in the global note to these types of purchasers.

        Only institutions, such as a securities broker or dealer, that have accounts with DTC or its nominee (called participants) and persons that may hold beneficial interests through participants can own a beneficial interest in the global note. The only place where the ownership of beneficial interests in the global note appears and the only way the transfer of those interests can be made are on the records kept by DTC (for each participant's interests) and the records kept by those participants (for interests of persons held by participants on their behalf).

        Secondary trading in bonds and notes of corporate issuers is generally settled in clearinghouse (that is, next-day) funds. In contrast, beneficial interests in global notes usually trade in DTC's same-day funds settlement system, and settle in immediately available funds. We make no representations as to the effect that settlement in immediately available funds will have on trading activity in those beneficial interests.

        We will make cash payments of interest, principal, redemption price or repurchase price of the global note, as well as any payment of liquidated damages, to Cede & Co., the nominee for DTC, as the registered owner of the global note. We will make these payments by wire transfer of immediately available funds on each payment date.

        We have been informed that DTC's practice is to credit participants' accounts on the payment date with payments in amounts proportionate to their respective beneficial interests in the notes represented by the global note as shown on DTC's records, unless DTC has reason to believe that it will not receive payment on that payment date. Payments by participants to owners of beneficial interests in notes represented by the global note held through participants will be the responsibility of those participants, as is now the case with securities held for the accounts of customers registered in street name.

        We will send any redemption or repurchase notices to Cede & Co.. We understand that if less than all the notes are being redeemed, DTC's practice is to determine by lot the amount of the holdings of

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each participant to be redeemed. We also understand that neither DTC nor Cede & Co. will consent or vote with respect to the notes. We have been advised that under its usual procedures, DTC will mail an omnibus proxy to us as soon as possible after the record date. The omnibus proxy assigns Cede & Co.'s consenting or voting rights to those participants to whose accounts the notes are credited on the record date identified in a listing attached to the omnibus proxy.

        Because DTC can only act on behalf of participants, who in turn act on behalf of indirect participants, the ability of a person having a beneficial interest in the principal amount represented by the global note to pledge such interest to persons or entities that do not participate in the DTC book-entry system, or otherwise take actions in respect of that interest, may be affected by the lack of physical certificate evidencing its interest.

        DTC has advised us that it will take any action permitted to be taken by a holder of notes (including the presentation of notes for exchange) only at the direction of one or more participants to whose account with DTC interests in the global note are credited, and only in respect of such portion of the principal amount of the notes represented by the global note as to which such participant or participants has or have given such direction. DTC has also advised us as follows:

        The policies and procedures of DTC, which may change periodically, will apply to payments, transfers, exchanges and other matters relating to beneficial interests in the global note. We and the trustee have no responsibility or liability for any aspect of DTC's or any participants' records relating to beneficial interests in the global note, including for payments made on the global note. Further, we and the trustee are not responsible for maintaining, supervising or reviewing any of those records.

Conversion Rights

        You have the option to convert any portion of the principal amount of any note that is an integral multiple of $1,000 into shares of our common stock at any time on or prior to the close of business on the maturity date, unless the notes have been previously redeemed or repurchased. The initial conversion rate is equal to 84.8320 shares per $1,000 principal amount of notes. The conversion rate is equivalent to a conversion price of approximately $11.79 per share. Your right to convert a note called for redemption or delivered for repurchase will terminate at the close of business on the business day immediately preceding the redemption date or repurchase date for that note, unless we default in making the payment due upon redemption or repurchase.

        You may convert all or part of any note by delivering the note at the office or agency of the trustee in the Borough of Manhattan, The City of New York, accompanied by a duly signed and completed conversion notice, a copy of which may be obtained from the trustee. The conversion date

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will be the date on which the note and the duly signed and completed conversion notice are so delivered. Beneficial owners of an interest in a global security may exercise their right of conversion pursuant to DTC's conversion program. This notice of conversion can be obtained at the office of the conversion agent. The conversion date will be the date on which the note and the duly signed and completed notice of conversion are delivered.

        As promptly as practicable on or after the conversion date, we will issue and deliver to the trustee a certificate or certificates for the number of full shares of our common stock issuable upon conversion, together with payment in lieu of any fraction of a share. The certificate or certificates will then be sent by the trustee to the conversion agent for delivery to the holders. The shares of our common stock issuable upon conversion of the notes will be fully paid and nonassessable and will rank equally with the other shares of our common stock.

        If you surrender a note for conversion on a date that is not an interest payment date, you will not be entitled to receive any interest for the period from the immediately preceding interest payment date to the conversion date, except as described below in this paragraph. However, if you are a holder of a note on a regular record date, including a note surrendered for conversion after the regular record date, you will receive the interest payable on such note on the next succeeding interest payment date. Accordingly, any note surrendered for conversion during the period from the close of business on a regular record date to the opening of business on the next succeeding interest payment date must be accompanied by payment of an amount equal to the interest payable on such interest payment date on the principal amount of notes being surrendered for conversion. However, you will not be required to make that payment if you are converting a note, or a portion of a note, that we have called for redemption, or that you are entitled to require us to repurchase from you upon a change in control, if your conversion right would terminate because of the redemption or repurchase between the regular record date and the close of business on the third business day following the next succeeding interest payment date.

        No other payment or adjustment for interest, or for any dividends in respect of our common stock, will be made upon conversion. Holders of our common stock issued upon conversion will not be entitled to receive any dividends payable to holders of our common stock as of any record time or date before the close of business on the conversion date. We will not issue fractional shares upon conversion. Instead, we will pay cash for such fractional shares based on the market price of our common stock at the close of business on the conversion date.

        You will not be required to pay any taxes or duties relating to the issue or delivery of our common stock on conversion but you will be required to pay any tax or duty relating to any transfer involved in the issue or delivery of our common stock in a name other than yours. Certificates representing shares of common stock will not be issued or delivered unless all taxes and duties, if any, payable by you have been paid.

        The conversion rate is subject to adjustment for, among other things:

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        We will not make any adjustment if holders may participate in the transaction or in certain other cases. In cases where the fair market value of assets, debt securities or certain rights, warrants or options to purchase our securities, applicable to one share of common stock, distributed to shareholders:

rather than being entitled to an adjustment in the conversion rate, the holder of a note will be entitled to receive upon conversion, in addition to the shares of common stock, the kind of assets, debt securities or certain rights, warrants or options comprising the distribution that such holder would have received if such holder had converted such notes immediately prior to the record date for determining the shareholders entitled to receive the distribution.

        We reserve the right to effect such increases in the conversion rate in addition to those required by the foregoing provisions as we consider to be advisable in order that any event treated for United States federal income tax purposes as a dividend of stock or stock rights will not be taxable to the recipients. We will not be required to make any adjustment to the conversion rate until the cumulative adjustments amount to 1.0% or more of the conversion rate. We will compute all adjustments to the conversion rate and will give notice by mail to holders of the registered notes of any such adjustments.

        In the event that we consolidate or merge with or into another entity or another entity is merged into us, or in case of any sale or transfer of all or substantially all of our assets, each note then outstanding will become convertible only into the kind and amount of securities, cash and other property receivable upon such consolidation, merger, sale or transfer by a holder of the number of

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shares of common stock into which the notes were convertible immediately prior to the consolidation, merger, sale or transfer. However, the preceding sentence will not apply to a merger or sale of all or substantially all of our assets that does not result in any reclassification, conversion, exchange or cancellation of the common stock.

        If we distribute shares of common stock of a subsidiary of ours to all holders of our common stock, we may elect to reserve the pro rata portion of such shares for the benefit of the holders of notes instead of adjusting the conversion rate of the notes.

        We may increase the conversion rate for any period of at least 20 days if our board of directors determines that the increase would be in our best interest. The board of directors' determination in this regard will be conclusive. We will give holders of notes at least 15 days' notice of such an increase in the conversion rate. Any such increase, however, will not be taken into account for purposes of determining whether the closing price of our common stock exceeds the conversion price by 110% in connection with an event that otherwise would be a change in control as defined below. If at any time we make a distribution of property to our shareholders that would be taxable to such shareholders as a dividend for United States federal income tax purposes, such as distributions of evidences of indebtedness or assets by us, but generally not stock dividends on common stock or rights to subscribe for common stock, and, pursuant to the anti-dilution provisions of the indenture, the number of shares into which notes are convertible is increased, that increase may be deemed for United States federal income tax purposes to be the payment of a taxable dividend to holders of notes. See "United States Federal Income Tax Consequences—U.S. Holders."

Subordination

        The indebtedness evidenced by the notes is subordinated to the extent provided in the indenture to the prior payment in full of all senior debt (as defined below). In the event of our insolvency, bankruptcy, receivership, liquidation, reorganization, debt restructuring or similar proceeding or liquidation, dissolution or winding up or any assignment for the benefit of creditors or marshalling of assets and liabilities, payments on the notes will be subordinated in right of payment to the prior payment in full, in cash or other payment satisfactory to the holders of senior debt, of all senior debt. As a result of these subordination provisions, in the event of our liquidation or insolvency, holders of senior debt may receive more, ratably, and holders of the notes may receive less, ratably, than our other creditors. In the event of any acceleration of the notes because of an event of default, holders of any senior debt would be entitled to payment in full, in cash or other payment satisfactory to the holders of senior debt, of all senior debt before the holders of notes are entitled to receive any payment or distribution. We are required to promptly notify holders of senior debt if payment of the notes is accelerated because of an event of default.

        We may also not make payment on the notes if:

        The foregoing prohibitions regarding payments on the notes shall end:

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        No new payment blockage period based on a nonpayment default may start unless 365 days have elapsed from the effectiveness of the prior payment blockage notice. No nonpayment default that existed or was continuing on the date of delivery of any payment blockage notice to the trustee shall be the basis for a subsequent payment blockage notice. The subordination provisions will not prevent the occurrence of any event of default under the indenture. If the trustee or any holder receives any payment that should not have been made to them in contravention of subordination provisions before all senior debt is paid in full, then such payment will be held in trust for the holders of senior debt.

        "Designated senior debt" means our obligations under any particular senior debt in which the instrument creating or evidencing the same or the assumption or guarantee thereof, or related agreements to which we are a party, expressly provides that such senior debt shall be "designated senior debt" for purposes of the indenture. The instrument, agreement or other document evidencing such designated senior debt may place limitations and conditions on the right of such senior debt to exercise the rights of designated senior debt.

        "Senior debt" means the principal, premium, if any, and interest, if any (including interest accruing on or after the filing of any petition in bankruptcy or for our reorganization whether or not such claim for post-petition interest is allowed in such proceeding) on, rent with respect to, and all fees and other amounts payable in connection with, the following, whether absolute or contingent, secured or unsecured, due or to become due, outstanding on the date of the indenture or thereafter created, incurred or assumed:

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        Senior debt does not include:

        The notes are structurally subordinated to all indebtedness and other liabilities, including trade payables, of our subsidiaries. Our right to receive any assets of our subsidiaries upon their liquidation or reorganization, and your consequent right to participate in those assets, will be effectively subordinated to the claims of the subsidiary's creditors, including trade creditors, except to the extent that we are recognized as a creditor of such subsidiary. Even in the event that we are recognized as a creditor of one of our subsidiaries, our claims would still be subordinate to any security interest in the assets of the subsidiary and any indebtedness of such subsidiary senior to that held by us.

        As of February 27, 2003, we had approximately $434 million of indebtedness and other liabilities that would have constituted senior debt. Our subsidiaries are separate and distinct legal entities and have no obligation, contingent or otherwise, to pay any amounts due under the notes or to make any funds available therefor, whether by dividends, loans or other payments. As of February 27, 2003, our subsidiaries had approximately $190 million of indebtedness and other liabilities, as to which the notes would have been effectively subordinated, excluding intercompany liabilities and approximately $391 million of liabilities guaranteed by us and included in senior debt.

        Neither we nor our subsidiaries are limited or prohibited from incurring senior debt or any other indebtedness or liabilities under the indenture. We expect from time to time to incur additional indebtedness and other liabilities, including senior debt. We also expect that our subsidiaries may from time to time incur additional indebtedness and other liabilities.

Optional Redemption by Micron

        On or after February 6, 2006, we may redeem the notes, in whole or in part, at the prices set forth below. If we elect to redeem all or part of the notes, we will give at least 20, but no more than 60, days' prior notice to you.

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The redemption price, expressed as a percentage of principal amount, is as follows for the following periods:

Period

  Redemption
Price

 
Beginning on February 6, 2006 and ending on January 31, 2007   101.429 %
Beginning on February 1, 2007 and ending on January 31, 2008   101.071  
Beginning on February 1, 2008 and ending on January 31, 2009   100.714  
Beginning on February 1, 2009 and ending on January 31, 2010   100.357  

and thereafter at 100% of the principal amount. In each case, we will pay interest to, but excluding, the redemption date.

        If we do not redeem all of the notes, the trustee will select the notes to be redeemed in principal amounts of $1,000 or whole multiples of $1,000 by lot or on a pro rata basis. If any notes are to be redeemed in part only, we will issue a new note or notes in principal amount equal to the unredeemed principal portion thereof. If a portion of your notes is selected for partial redemption and you convert a portion of your notes, the converted portion will be deemed to be taken from the portion selected for redemption.

        No sinking fund is provided for the notes, which means that the indenture does not require us to redeem or retire the notes periodically.

Payment and Conversion

        We will make all payments of principal and interest on the notes by dollar check drawn on an account maintained at a bank in The City of New York. If you hold registered notes with a face value greater than $2,000,000, at your request we will make payments of principal or interest to you by wire transfer to an account maintained by you at a bank in The City of New York. Payment of any interest on the notes will be made to the person in whose name the note, or any predecessor note, is registered at the close of business on January 15 or July 15, whether or not a business day, immediately preceding the relevant interest payment date (a "regular record date"). If you hold registered notes with a face value in excess of $2,000,000 and you would like to receive payments by wire transfer, you will be required to provide the trustee with wire transfer instructions at least 15 days prior to the relevant payment date.

        Payments on any global note registered in the name of DTC or its nominee will be payable by the trustee to DTC or its nominee in its capacity as the registered holder under the indenture. Under the terms of the indenture, we and the trustee will treat the persons in whose names the notes, including any global note, are registered as the owners for the purpose of receiving payments and for all other purposes. Consequently, neither we, the trustee nor any of our agents or the trustee's agents has or will have any responsibility or liability for:

        We will not be required to make any payment on the notes due on any day which is not a business day until the next succeeding business day. The payment made on the next succeeding business day will be treated as though it were paid on the original due date and no interest will accrue on the payment for the additional period of time.

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        Notes may be surrendered for conversion at the office or agency of the trustee in the Borough of Manhattan, New York. Notes surrendered for conversion must be accompanied by appropriate notices and any payments in respect of interest or taxes, as applicable, as described above under "Conversion Rights."

        We have initially appointed the trustee as paying agent and conversion agent. We may terminate the appointment of any paying agent or conversion agent and appoint additional or other paying agents and conversion agents. However, until the notes have been delivered to the trustee for cancellation, or moneys sufficient to pay the principal of, premium, if any, and interest on the notes have been made available for payment and either paid or returned to us as provided in the indenture, the trustee will maintain an office or agency in the Borough of Manhattan, New York for surrender of notes for conversion. Notice of any termination or appointment and of any change in the office through which any paying agent or conversion agent will act will be given in accordance with "Notices" below.

        All moneys deposited with the trustee or any paying agent, or then held by us, in trust for the payment of principal of, premium, if any, or interest on any notes which remain unclaimed at the end of two years after the payment has become due and payable will be repaid to us, and you will then look only to us for payment.

Repurchase at Option of Holders Upon a Change in Control

        If a change in control (as defined below) occurs, you shall have the right, at your option, to require us to repurchase all of your notes not previously called for redemption, or any portion of the principal amount thereof, that is $1,000 or an integral multiple of $1,000. We will repurchase the notes upon a change in control at a price equal to 100% of the principal amount of the notes to be repurchased, together with interest accrued to, but excluding, the repurchase date.

        At our option, instead of paying the repurchase price in cash, we may pay the repurchase price, in whole or in part, in our common stock (or in the case of a merger, consolidation or similar transaction in which we are not the surviving corporation, common stock, common equity interests, ordinary shares or American Depository Shares of the surviving corporation or its direct or indirect parent corporation) valued at 95% of the average of the closing prices of our common stock for the five trading days immediately preceding the second trading day prior to the repurchase date. We may only pay the repurchase price in our common stock or applicable securities if we satisfy conditions provided in the indenture.

        Within 30 days after the occurrence of a change in control, we are obligated to give to you notice of the occurrence of the change in control, of the type of consideration to be paid and of the repurchase right arising as a result of the change in control. We must also deliver a copy of the notice to the trustee. To exercise the repurchase right, you must deliver on or before the second business day immediately preceding the 30th day after the date of our notice a written notice to the trustee of your exercise of your repurchase right, together with the notes with respect to which the right is being exercised. You may withdraw this notice by delivering to the trustee a notice of withdrawal prior to the close of business on the second business day immediately preceding the repurchase date. We are required to repurchase the notes on a repurchase date that is 30 days after our notice.

        Because the value of any shares of our common stock that we may use to satisfy our repurchase obligation will be determined prior to the repurchase date, holders of the notes bear the market risk that our common stock will decline in value between the date the repurchase price is calculated and the repurchase date.

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        A change in control shall be deemed to have occurred at the time after the notes are originally issued that any of the following occurs:

        However, a change in control shall not be deemed to have occurred if either:

        For purposes of these provisions:

        The rules and regulations under the Exchange Act require the dissemination of prescribed information to security holders in the event of an issuer tender offer. These rules may apply in the event that the repurchase option becomes available to you. We will comply with these rules to the extent applicable at that time.

        We may, to the extent permitted by applicable law, at any time purchase notes in the open market or by tender at any price or by private agreement. Any note so purchased by us may, to the extent

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permitted by applicable law and, subject to certain conditions, be reissued or resold or may, at our option, be surrendered to the trustee for cancellation. Any notes surrendered for cancellation may not be reissued or resold and will be canceled promptly.

        Our ability to repurchase notes upon the occurrence of a change in control is subject to limitations. We may not have sufficient financial resources or the ability to arrange financing to pay the repurchase price in cash for all the notes delivered by holders seeking to exercise their repurchase right. Although we may elect, subject to satisfaction of certain conditions, to pay the repurchase price for the notes in common stock or applicable securities, our ability to repurchase the notes in cash may be limited or prohibited by the terms of any future borrowing arrangements existing at the time of a change in control. Any failure by us to repurchase the notes upon a change in control would result in an event of default under the indenture, whether or not the repurchase is permitted by the subordination provisions of the indenture. Any such default may, in turn, cause a default under our senior debt. Moreover, the occurrence of a change in control could result in an event of default under the terms of our then existing indebtedness. As a result, any repurchase of the notes may be prohibited until the senior debt is paid in full.

        The change in control repurchase provision of the notes may, in certain circumstances, make more difficult or discourage a takeover of our company. The change in control repurchase feature, however, is not the result of our knowledge or any specific effort to accumulate shares of our common stock, to obtain control of us by means of a merger, tender offer solicitation or otherwise by management to adopt a series of anti-takeover provisions. Instead, the change in control purchase feature is a standard term contained in convertible securities similar to the notes.

        The definition of change in control includes a phrase relating to the transfer or sale of all or substantially all of our assets. There is no precise, established definition of the phrase "substantially all" under applicable law. Accordingly, your ability to require us to repurchase your notes as a result of a transfer or sale of less than all of our assets may be uncertain.

        The foregoing provisions would not necessarily afford you protection in the event of highly leveraged or other transactions involving us that may adversely affect you.

Mergers and Sales of Assets by Micron

        We may not consolidate with or merge into any other person or convey, transfer, sell or lease our properties and assets substantially as an entirety to any person, other than to one or more of our subsidiaries, unless:

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Events of Default

        The following are events of default under the indenture:

        Subject to the provisions of the indenture relating to the duties of the trustee in case an event of default shall occur and be continuing, the trustee will be under no obligation to exercise any of its rights or powers under the indenture at the request or direction of any holder, unless the holder shall have offered reasonable indemnity to the trustee. Subject to providing indemnification of the trustee, the holders of a majority in aggregate principal amount of the outstanding notes will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee or exercising any trust or power conferred on the trustee.

        If an event of default other than an event of default arising from events of insolvency, bankruptcy or reorganization occurs and is continuing, either the trustee or the holders of at least 25% in aggregate principal amount of the outstanding notes may, subject to the subordination provisions of the indenture, accelerate the maturity of all notes. However, after such acceleration, but before a judgment or decree based on acceleration, the holders of a majority in aggregate principal amount of outstanding notes may, under certain circumstances, rescind and annul the acceleration if all events of default, other than the non-payment of principal of the notes that have become due solely by such declaration of acceleration, have been cured or waived as provided in the indenture. If an event of default arising from events of insolvency, bankruptcy or reorganization occurs, then the principal of, and accrued interest on, all the notes will automatically become immediately due and payable without any declaration or other act on the part of the holders of the notes or the trustee. For information as to waiver of defaults, see "Meetings, Modification and Waiver" below.

        You will not have any right to institute any proceeding with respect to the indenture, or for any remedy under the indenture, unless:

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        However, these limitations do not apply to a suit instituted by you for the enforcement of payment of the principal of, premium, if any, or interest, including liquidated damages, on your note on or after the respective due dates expressed in your note or your right to convert your note in accordance with the indenture.

        We are required to furnish to the trustee annually a statement as to our performance of certain of our obligations under the indenture and as to any default in such performance.

Meetings, Modification and Waiver

        The indenture contains provisions for convening meetings of the holders of notes to consider matters affecting their interests.

        Certain limited modifications of the indenture may be made without the necessity of obtaining the consent of the holders of the notes.

        Other modifications and amendments of the indenture may be made, compliance by us with certain restrictive provisions of the indenture may be waived, and any past defaults by us under the indenture (except a default in the payment of principal, premium, if any, or interest) may be waived, either:

        The quorum at any meeting called to adopt a resolution will be persons holding or representing a majority in aggregate principal amount of the notes at the time outstanding and, at any reconvened meeting adjourned for lack of a quorum, 25% of such aggregate principal amount.

        However, a modification or amendment requires the consent of the holder of each outstanding note affected if it would:

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Registration Rights

        In connection with the initial private placement of the notes we entered into a registration rights agreement with the initial purchasers. In the registration rights agreement we agreed, for the benefit of the holders of the notes and the shares of common stock issuable upon conversion of the notes, commonly referred to as the registrable securities, that we will, at our expense, use our reasonable efforts to:

        We have filed this registration statement to meet our obligations under the registration rights agreement. We will be permitted to suspend the use of the prospectus that is part of the shelf registration statement in connection with the sales of registrable securities during prescribed periods of time for reasons relating to pending corporate developments, public filings with the SEC and other events. The periods during which we can suspend the use of the prospectus may not, however, exceed a total of 45 days in any 90-day period or a total of 90 days in any 365-day period. We will provide to each holder of registrable securities named in the prospectus copies of the prospectus that is a part of the shelf registration statement, notify each holder when the shelf registration statement has become effective and take certain other actions required to permit public resales of the registrable securities.

        We may, upon written notice to all the holders of notes, postpone having the shelf registration statement declared effective for a reasonable period not to exceed 90 days if we possess material non-public information the disclosure of which would have a material adverse effect on us and our subsidiaries taken as a whole. Notwithstanding any such postponement, liquidated damages will accrue on restricted securities if either of the following registration defaults occurs:

        In either case, liquidated damages will accrue on the restricted securities (as defined in the registration rights agreement) from and including the day following the registration default to, but excluding, the day on which the registration default has been cured. Liquidated damages will be paid semi-annually in arrears, with the first semi-annual payment due on the first interest payment date following the date on which the liquidated damages began to accrue.

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        The rates at which liquidated damages will accrue will be as follows:

        In the event notes that are registrable securities are converted into shares of common stock that are restricted securities, any liquidated damages will accrue on such shares at the rates described above, applied to the conversion price at that time.

        In addition, the interest rate on all of the restricted securities of electing holders will be increased if:

        In either event, the interest rate on the restricted securities of electing holders will increase by an additional 0.50% per annum from the 46th day of the 90-day period or the 91st day of the 12-month period. The increased rate will continue until the earlier of the following:

        This summary of the registration rights agreement is not complete and is subject to, and qualified in its entirety by reference to, all the provisions of the registration rights agreement, a copy of which will be made available to beneficial owners of the notes upon request to us.

Notices

        Notice to holders of the registered notes will be given by mail to the addresses as they appear in the security register. Notices will be deemed to have been given on the date of such mailing.

        Notice of a redemption of notes will be given not less than 20 nor more than 60 days prior to the redemption date and will specify the redemption date. A notice of redemption of the notes will be irrevocable.

Replacement of Notes

        We will replace any note that becomes mutilated, destroyed, stolen or lost at the expense of the holder upon delivery to the trustee of the mutilated notes or evidence of the loss, theft or destruction satisfactory to us and the trustee. In the case of a lost, stolen or destroyed note, indemnity satisfactory to the trustee and us may be required at the expense of the holder of the note before a replacement note will be issued.

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Payment of Stamp and Other Taxes

        We will pay all stamp and other duties, if any, that may be imposed by the United States or any political subdivision thereof or taxing authority thereof or therein with respect to the issuance of the notes or of shares of stock upon conversion of the notes. We will not be required to make any payment with respect to any other tax, assessment or governmental charge imposed by any government or any political subdivision thereof or taxing authority thereof or therein.

Satisfaction and Discharge

        We may satisfy and discharge our obligations under the indenture while the notes remain outstanding, subject to certain conditions, if:

and in either case, we have deposited with the trustee an amount sufficient to pay and discharge all outstanding notes on the date of their scheduled maturity or the scheduled date of redemption.

Governing Law

        The indenture, the notes and the registration rights agreement will be governed by and construed in accordance with the laws of the State of New York, United States of America.

The Trustee

        If an event of default occurs and is continuing, the trustee will be required to use the degree of care of a prudent person in the conduct of his own affairs in the exercise of its powers. Subject to such provisions, the trustee will be under no obligation to exercise any of its rights or powers under the indenture at the request of any of the holders of notes, unless they shall have furnished to the trustee reasonable security or indemnity.

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DESCRIPTION OF CAPITAL STOCK

General

        Our authorized capital stock consists of 3,000,000,000 shares of common stock, $0.10 par value. As of April 25, 2003, there were approximately 608.6 million shares of common stock issued and outstanding. The following summary is qualified in its entirety by reference to our certificate of incorporation and bylaws.

Common Stock

        The holders of common stock are entitled to one vote per share on all matters to be voted upon by the shareholders and are entitled to cumulative voting in the election of directors. Subject to preferences that may be applicable to any future preferred stock or any other senior equity, the holders of common stock are entitled to receive ratably such dividends, if any, as may be declared from time to time by the board of directors out of funds legally available therefor. In the event of a liquidation, dissolution or winding up of us, the holders of common stock are entitled to share ratably in all assets remaining after payment of liabilities, subject to prior rights of preferred stock, if any, then outstanding. The common stock has no preemptive or conversion rights or other subscription rights. There are no redemption or sinking fund provisions available to the common stock. All outstanding shares of common stock are fully paid and nonassessable.

Warrants

        We have issued warrants to purchase 29.1 million shares of our common stock. The warrants entitle the holders to exercise their warrants and purchase shares of our common stock for $56.00 per share (the "Exercise Price") at any time through May 15, 2008 (the "Expiration Date"). The Exercise Price is subject to adjustments in certain events. Warrants exercised prior to the Expiration Date will be settled on a "net share" basis, wherein investors received common stock equal to the difference between $56.00 and the average closing sale price for the shares of common stock over the 30 trading days immediately preceding the Exercise Date. At expiration, the Company may elect to settle the warrants on a net share basis or for cash, provided certain conditions are satisfied. As of February 27, 2003, there have been no exercises of warrants and all warrants issued remain outstanding.

Anti-Takeover Effects of Delaware Law

        We are subject to the provisions of Section 203 of the Delaware General Corporation Law, which, subject to certain exceptions, prohibits a Delaware corporation from engaging in any business combination with any interested shareholder for a period of three years following the time that such shareholder became an interested shareholder, unless:

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        Section 203 defines "business combination" to include:

        In general, Section 203 defines an "interested shareholder" as any entity or person beneficially owning 15% or more of the outstanding voting stock of the corporation and any entity or person affiliated with or controlling or controlled by such entity or person.

Transfer Agent and Registrar

        The transfer agent and registrar for our common stock is Wells Fargo Bank Minnesota, National Association.


UNITED STATES FEDERAL INCOME TAX CONSEQUENCES

        This section summarizes the material U.S. federal income tax considerations relating to the purchase, ownership, and disposition of the notes and of common stock into which the notes may be converted. This summary does not provide a complete analysis of all potential tax considerations. The information provided below is based on existing authorities. These authorities may change, or the Internal Revenue Service might interpret the existing authorities differently. In either case, the tax consequences of purchasing, owning or disposing of notes or common stock could differ from those described below. The summary generally applies only to "U.S. Holders" that hold the notes or common stock as "capital assets" (generally, for investment). For this purpose, U.S. Holders include citizens or residents of the United States and corporations organized under the laws of the United States or any state. Trusts are U.S. Holders if they are subject to the primary supervision of a U.S. court and the control of one of more U.S. persons. Special rules apply to nonresident alien individuals and foreign corporations or trusts ("Non-U.S. Holders"). This summary describes some, but not all, of these special rules. If a partnership is a beneficial owner of a note (or common stock acquired upon conversion or exchange of a note), the tax treatment of a partner in the partnership will depend upon the status of the partner and the activities of the partnership. The summary generally does not address tax considerations that may be relevant to particular investors because of their specific circumstances, or because they are subject to special rules. Finally, the summary does not describe the effect of the federal estate and gift tax laws on U.S. Holders or the effects of any applicable foreign, state, or local laws.

        INVESTORS CONSIDERING THE PURCHASE OF NOTES SHOULD CONSULT THEIR OWN TAX ADVISORS REGARDING THE APPLICATION OF THE U.S. FEDERAL INCOME TAX LAWS TO THEIR PARTICULAR SITUATIONS AND THE CONSEQUENCES OF FEDERAL ESTATE OR GIFT TAX LAWS, FOREIGN, STATE, OR LOCAL LAWS, AND TAX TREATIES.

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U.S. Holders

        U.S. Holders will be required to recognize as ordinary income any interest paid or accrued on the notes, in accordance with their regular method of accounting. In general, if the terms of a debt instrument entitle a holder to receive payments other than fixed periodic interest that exceed the issue price of the instrument, the holder may be required to recognize additional interest as "original issue discount" over the term of the instrument. We believe that the notes will not be issued with original issue discount. We may be required to make additional payments to holders of the notes as liquidated damages if we do not file or cause to be declared effective a registration statement, as described under "Description of the Notes-Registration Rights." The original issue discount rules allow contingent payments such as these to be disregarded in computing a holder's interest income if the contingency is "remote." We believe that there is only a remote possibility that we would be required to pay liquidated damages because of a failure to provide registration rights. Our determination in this regard is binding on U.S. Holders unless they disclose their contrary position. If, contrary to expectations, we pay liquidated damages, U.S. Holders would be required to recognize additional interest income.

        A U.S. Holder will generally recognize capital gain or loss if the holder disposes of a note in a sale, redemption or exchange other than a conversion of the note into common stock. The holder's gain or loss will equal the difference between the proceeds received by the holder and the holder's adjusted tax basis in the note. The proceeds received by the holder will include the amount of any cash and the fair market value of any other property received for the note. The holder's tax basis in the note will generally equal the amount the holder paid for the note. The portion of any proceeds that is attributable to accrued interest will not be taken into account in computing the holder's capital gain or loss. Instead, that portion will be recognized as ordinary interest income to the extent that the holder has not previously included the accrued interest in income. The gain or loss recognized by a holder on a disposition of the note will be long-term capital gain or loss if the holder held the note for more than one year. Long-term capital gains of non-corporate taxpayers are taxed at lower rates than those applicable to ordinary income. The deductibility of capital losses is subject to limitation.

        If, upon a change in control, a holder requires us to repurchase some or all of the holder's notes and we elect to pay the repurchase price with shares of our common stock, and if the notes are "securities" for U.S. federal income tax purposes, the holder would generally not recognize any gain or loss on the exchange. If the holder receives cash in lieu of a fractional share of common stock, however, the holder would be treated as if he received the fractional share and then had the fractional share redeemed for cash. The holder would recognize gain or loss equal to the difference between the cash received and that portion of his basis in the stock attributable to the fractional share. In addition, the value of any portion of the common stock received that is attributable to accrued interest on the notes will be taxed as ordinary income. The holder's aggregate basis in the common stock received in exchange for the notes (including any fractional share for which cash is paid but excluding any shares attributable to accrued interest) would equal his adjusted basis in the note. The holder's holding period for the common stock so received would include the period during which he held the note. The holder's basis in any shares of common stock attributable to accrued interest would equal the fair market value of those shares when received, and the holding period of those shares would begin on the day after the holder's receipt of those notes. If the notes are not securities for U.S. federal income tax purposes, and if the holder's exchange of the notes for common stock were not treated as a conversion of the notes, then the exchange would be subject to the general rules for exchanges described in the preceding paragraph.

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        A U.S. Holder generally will not recognize any income, gain or loss on converting a note into common stock. If the holder receives cash in lieu of a fractional share of stock, however, the holder would be treated as if he received the fractional share and then had the fractional share redeemed for the cash. The holder would recognize gain or loss equal to the difference between the cash received and that portion of his basis in the stock attributable to the fractional share. The holder's aggregate basis in the common stock (including any fractional share for which cash is paid) will equal his adjusted basis in the note. The holder's holding period for the stock will include the period during which he held the note.

        If, after a U.S. Holder converts a note into common stock, we make a distribution in respect of that stock, the distribution will be treated as a dividend, taxable to the U.S. Holder as ordinary income, to the extent it is paid from our current or accumulated earnings and profits. If the distribution exceeds our current and accumulated profits, the excess will be treated first as a tax-free return of the holder's investment, up to the holder's basis in its common stock. Any remaining excess will be treated as capital gain. If the U.S. Holder is a U.S. corporation, it would generally be able to claim a deduction equal to a portion of any dividends received.

        The terms of the notes allow for changes in the conversion rate of the notes in certain circumstances. A change in conversion rate that allows noteholders to receive more shares of common stock on conversion may increase the noteholders' proportionate interests in our earnings and profits or assets. In that case, the noteholders would be treated as though they received a dividend in the form of our stock. Such a constructive stock dividend could be taxable to the noteholders, although they would not actually receive any cash or other property. A taxable constructive stock dividend would result, for example, if the conversion rate is adjusted to compensate noteholders for distributions of cash or property to our shareholders. Not all changes in conversion rate that allow noteholders to receive more stock on conversion, however, increase the noteholders' proportionate interests in the company. For instance, a change in conversion rate could simply prevent the dilution of the noteholders' interests upon a stock split or other change in capital structure. Changes of this type, if made by a bona fide, reasonable adjustment formula, are not treated as constructive stock dividends. Conversely, if an event occurs that dilutes the noteholders' interests and the conversion rate is not adjusted, the resulting increase in the proportionate interests of our shareholders could be treated as a taxable stock dividend to them. Any taxable constructive stock dividends resulting from a change to, or failure to change, the conversion rate would be treated like dividends paid in cash or other property. They would result in ordinary income to the recipient, to the extent of our current or accumulated earnings and profits, with any excess treated as a tax-free return of capital or as capital gain.

        A U.S. Holder will generally recognize capital gain or loss on a sale or exchange of common stock. The holder's gain or loss will equal the difference between the proceeds received by the holder and the holder's adjusted tax basis in the stock. The proceeds received by the holder will include the amount of any cash and the fair market value of any other property received for the stock. The gain or loss recognized by a holder on a sale or exchange of stock will be long-term capital gain or loss if the holder held the stock for more than one year.

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Special Tax Rules Applicable to Non-U.S. Holders

        Payments of interest to nonresident persons or entities are generally subject to U.S. federal income tax at a rate of 30 percent, collected by means of withholding by the payor. Payments of interest on the notes to most Non-U.S. Holders, however, will qualify as "portfolio interest," and thus will be exempt from the withholding tax, if the holders certify their nonresident status as described below. The portfolio interest exception will not apply to payments of interest to a Non-U.S. Holder that:

        In general, a foreign corporation is a controlled foreign corporation if at least 50 percent of its stock is owned, directly or indirectly, by one or more U.S. persons that each owns, directly or indirectly, at least 10 percent of the corporation's voting stock.

        Even if the portfolio interest exception does not apply, payments of interest to a nonresident person or entity might not be subject to withholding tax at a 30 percent rate, or might be subject to withholding tax at a reduced rate, under the terms of a tax treaty between the United States and the Non-U.S. holder's country of residence.

        The portfolio interest exception, entitlement to treaty benefits and several of the special rules for Non-U.S. Holders described below apply only if the holder certifies its nonresident status. A Non-U.S. Holder can meet this certification requirement by providing a Form W-8BEN or appropriate substitute form to us or our paying agent. If the holder holds the note through a financial institution or other agent acting on the holder's behalf, the holder will be required to provide appropriate documentation to the agent. The holder's agent will then be required to provide certification to us or our paying agent, either directly or through other intermediaries. For payments made to a foreign partnership, the certification requirements generally apply to the partners rather than the partnership.

        Non-U.S. Holders generally will not be subject to U.S. federal income tax on any gain realized on the sale, exchange, or other disposition of notes. This general rule, however, is subject to several exceptions. For example, the gain would be subject to U.S. federal income tax if:

        The FIRPTA rules may apply to a sale, exchange or other disposition of notes if we are, or were within five years before the transaction, a "U.S. real property holding corporation" ("USRPHC"). In general, we would be a USRPHC if interests in U.S. real estate comprised most of our assets. We do not believe that we are a USRPHC or that we will become one in the future.

        A Non-U.S. Holder generally will not recognize any income, gain or loss on converting a note into common stock. Any gain recognized as a result of the holder's receipt of cash in lieu of a fractional

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share of stock would also generally not be subject to U.S. federal income tax. See "Special Tax Rules Applicable to Non-U.S. Holders—Sale of Common Stock" below.

        Dividends paid to a Non-U.S. Holder on common stock received on conversion of a note will generally be subject to U.S. withholding tax at a 30 percent rate. The withholding tax might not apply, however, or might apply at a reduced rate, under the terms of a tax treaty between the United States and the Non-U.S. Holder's country of residence. A Non-U.S. Holder must demonstrate its entitlement to treaty benefits by certifying its nonresident status. Some of the common means of meeting this requirement are described above under "Special Tax Rules Applicable to Non-U.S. Holders—Taxation of Interest."

        Non-U.S. Holders will generally not be subject to U.S. federal income tax on any gains realized on the sale, exchange, or other disposition of common stock. This general rule, however, is subject to exceptions, some of which are described under "Special Tax Rules Applicable to Non-U.S. Holders—Sale, Exchange or Redemption of Notes."

        The preceding discussion of the tax consequences of the purchase, ownership or disposition of notes or common stock by a Non-U.S. Holder assumes that the holder is not engaged in a U.S. trade or business. If any interest on the notes, dividends on common stock, or gain from the sale, exchange or other disposition of the notes or stock is effectively connected with a U.S. trade or business conducted by the Non-U.S. Holder, then the income or gain will be subject to U.S. federal income tax at the regular graduated rates. If the Non-U.S. Holder is eligible for the benefits of a tax treaty between the United States and the holder's country of residence, any "effectively connected" income or gain would probably be subject to U.S. federal income tax only if it is also attributable to a permanent establishment maintained by the holder in the United States. Payments of interest or dividends that are effectively connected with a U.S. trade or business, and therefore included in the gross income of a Non-U.S. Holder, will not be subject to the 30 percent withholding tax. To claim exemption from withholding, the holder must certify its qualification, which can be done by filing a Form W-8ECI. If the Non-U.S. Holder is a corporation, that portion of its earnings and profits that is effectively connected with its U.S. trade or business would generally be subject to a "branch profits tax." The branch profits tax rate is generally 30 percent, although an applicable tax treaty might provide for a lower rate.

        The estates of nonresident alien individuals are subject to U.S. federal estate tax on property with a U.S. situs. The notes will not be U.S. situs property as long as interest on the notes paid immediately before the death of the holder would have qualified as portfolio interest, exempt from withholding tax as described above under "Special Tax Rules Applicable to Non-U.S. Holders: Taxation of Interest." Because we are a U.S. corporation, our common stock will be U.S. situs property, and therefore will be included in the taxable estate of a nonresident alien decedent. The U.S. federal estate tax liability of the estate of a nonresident alien may be affected by a tax treaty between the United States and the decedent's country of residence.

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Backup Withholding and Information Reporting

        The Code and the Treasury regulations require those who make specified payments to report the payments to the IRS. Among the specified payments are interest, dividends, and proceeds paid by brokers to their customers. The required information returns enable the IRS to determine whether the recipient properly included the payments in income. This reporting regime is reinforced by "backup withholding" rules. These rules require the payors to withhold tax from payments subject to information reporting if the recipient fails to cooperate with the reporting regime by failing to provide his taxpayer identification number to the payor, furnishing an incorrect identification number, or repeatedly failing to report interest or dividends on his returns. The withholding tax rate is currently 30 percent but will be reduced to 29 percent for 2004 and 2005 and further reduced to 28 percent for 2006 and thereafter. The information reporting and backup withholding rules do not apply to payments to corporations, whether domestic or foreign.

        Payments of interest or dividends to individual U.S. Holders of notes or common stock will generally be subject to information reporting, and will be subject to backup withholding unless the holder provides us or our paying agent with a correct taxpayer identification number.

        The information reporting and backup withholding rules do not apply to payments that are subject to the 30 percent withholding tax on dividends or interest paid to nonresidents, or to payments that are exempt from that tax by application of a tax treaty or special exception. Therefore, payments to Non-U.S. Holders of dividends on common stock, or interest on notes, will generally not be subject to information reporting or backup withholding. To avoid backup withholding, a Non-U.S. Holder will have to certify its nonresident status. Some of the common means of doing so are described under "Special Rules Applicable to Non-U.S. Holders—Taxation of Interest."

        Payments made to U.S. Holders by a broker upon a sale of notes or common stock will generally be subject to information reporting and backup withholding. If, however, the sale is made through a foreign office of a U.S. broker, the sale will be subject to information reporting but not backup withholding. If the sale is made through a foreign office of a foreign broker, the sale will generally not be subject to either information reporting or backup withholding. This exception may not apply, however, if the foreign broker is owned or controlled by U.S. persons, or is engaged in a U.S. trade or business.

        Payments made to Non-U.S. Holders by a broker upon a sale of notes or common stock will not be subject to information reporting or backup withholding as long as the Non-U.S. Holder certifies its foreign status.

        Any amounts withheld from a payment to a holder of notes or common stock under the backup withholding rules can be credited against any U.S. federal income tax liability of the holder.

39


        THE PRECEDING DISCUSSION OF U.S. FEDERAL INCOME TAX CONSIDERATIONS IS FOR GENERAL INFORMATION ONLY. IT IS NOT TAX ADVICE. EACH PROSPECTIVE INVESTOR SHOULD CONSULT ITS OWN TAX ADVISOR REGARDING THE PARTICULAR U.S. FEDERAL, STATE, LOCAL, AND FOREIGN TAX CONSEQUENCES OF PURCHASING, HOLDING, AND DISPOSING OF OUR NOTES OR COMMON STOCK, INCLUDING THE CONSEQUENCES OF ANY PROPOSED CHANGE IN APPLICABLE LAWS.


SELLING SECURITYHOLDERS

        We originally issued the notes in a private placement in February 2003. The notes were subsequently resold to purchasers, including the selling securityholders listed below, in transactions exempt from registration. Selling securityholders may offer and sell the notes and the underlying common stock pursuant to this prospectus.

        The following table contains information as of April 21, 2003, with respect to the selling securityholders and the principal amount of notes and the underlying common stock beneficially owned by each selling securityholder that may be offered using this prospectus.

Name

  Principal Amount at Maturity of Notes Beneficially Owned That May Be Sold
  Percentage of Notes Outstanding
  Number of Shares of Common Stock That May Be Sold(1)
  Percentage of Common Stock Outstanding(2)
AIG DKR Sandshore Opportunity Holding Fund Ltd.   $ 4,000,000   *   339,328   *
Akela Capital Master Fund, Ltd.     5,000,000   *   424,160   *
Albany City Pension Plan     135,000   *   11,452   *
Allegheny Technologies Inc. Pension Fund     2,800,000   *   237,529   *
Allstate Insurance Company     1,400,000   *   118,764   *
Arbitex Master Fund, L.P.     22,500,000   3.6   1,908,720   *
Argent Classic Convertible Arbitrage Fund L.P.     2,700,000   *   229,046   *
Argent Classic Convertible Arbitrage (Bermuda) Fund Ltd.     5,300,000   *   449,609   *
Argent LowLev Convertible Arbitrage Fund LLC     1,200,000   *   101,798   *
Argent LowLev Convertible Arbitrage Fund Ltd.     6,900,000   1.1   585,340   *
Arkansas PERS     1,675,000   *   142,093   *
Aventis Pension Master Trust     250,000   *   21,208   *
Boilermaker—Blacksmith Pension Trust     1,350,000   *   114,523   *
Boilermakers Blacksmith Pension Trust     2,125,000   *   180,268   *
CALAMOS Convertible Fund     11,000,000   1.7   933,152   *
CALAMOS Convertible Growth & Income Fund     10,000,000   1.6   848,320   *
CALAMOS Convertible Portfolio—CALAMOS Advisors Trust     160,000   *   13,573   *
CALAMOS Global Convertible Fund     400,000   *   33,932   *
California Wellness Foundation     400,000   *   33,932   *
CEMEX Pension Plan     125,000   *   10,604   *

40


Chrysler Corporation Master Retirement Trust     4,095,000   *   347,387   *
Consulting Group Capital Market Funds     1,000,000   *   84,832   *
Convertible Securities Fund     40,000   *   3,393   *
Credit Suisse First Boston LLC     7,000,000   1.1   593,824   *
Deephaven Domestic Convertible Trading Ltd.     1,000,000   *   84,832   *
Delaware PERS     2,350,000   *   199,355   *
Delaware State Employees' Retirement Fund     1,810,000   *   153,545   *
Delta Air Lines Master Trust     1,450,000   *   123,006   *
Delta Airlines Master Trust     1,025,000   *   86,952   *
Delta Airlines Master Trust     1,350,000   *   114,523   *
Delta Pilots D & S Trust     860,000   *   72,955   *
Delta Pilots Disability & Survivorship Trust     400,000   *   33,932   *
Dorinco Reinsurance Company     750,000   *   63,624   *
Dow Chemical Company Employees' Retirement Plan     2,600,000   *   220,563   *
Duke Endowment     415,000   *   35,205   *
Family Service Life Insurance Co.     200,000   *   16,966   *
Fondren Foundation     150,000   *   12,724   *
Froley Revy Convertible Security Fund     260,000   *   22,056   *
Gasner Investors Holdings Ltd.     2,250,000   *   190,872   *
Golden Rule Insurance Company     335,000   *   28,418   *
Goldman Sachs & Co.     1,750,000   *   148,456   *
Grace Convertible Arbitrage Fund, Ltd.     9,250,000   1.5   784,696   *
Greek Catholic Union of the USA     50,000   *   4,241   *
Guardian Life Insurance Co.     7,500,000   1.2   636,240   *
Guardian Pension Trust     600,000   *   50,899   *
Highbridge International LLC     48,100,000   7.6   4,080,419   *
ICI American Holdings Trust     530,000   *   44,960   *
KBC Financial Products USA, Inc.     3,600,000   *   305,395   *
Kettering Medical Center Funded Depreciation Account     75,000   *   6,362   *
Knoxville City Pension System     300,000   *   25,449   *
Knoxville Utilities Board Retirement System     130,000   *   11,028   *
Louisiana Workers' Compensation Corporation     325,000   *   27,570   *
Lehman Brothers Special Financing, Inc.     40,000,000   6.3   3,393,280    
Lyxor Master Fund     5,500,000   *   466,576   *
Lyxor Master Fund Ref: Argent/LowLev CB     1,700,000   *   144,214   *
Macomb County Employees' Retirement System     275,000   *   23,328   *

41


McMahan Securities Co. L.P.     2,750,000   *   233,288   *
Microsoft Corporation     2,365,000   *   200,627   *
Motion Picture Industry Health Plan—Active Member Fund     430,000   *   36,477   *
Motion Picture Industry Health Plan—Retiree Member Fund     265,000   *   22,480   *
Nations Convertible Securities Fund     3,960,000   *   335,934   *
Nomura Securities International, Inc.     3,000,000   *   254,496   *
OCM Convertible Trust     4,235,000   *   359,263   *
Oregon, State of/Equity     7,500,000   1.2   636,240   *
Partner Reinsurance Company Ltd.     1,370,000   *   116,219   *
Partners Group Alternative Strategies PCC, Ltd.     300,000   *   25,449   *
Port Authority of Allegheny Co. Retirement & Disability Allowance Plan Employees Represented by Local 85 of Amalgamated Transit Union     650,000   *   55,140   *
Prisma Foundation     75,000   *   6,362   *
Prudential Insurance Co of America     145,000   *   12,300   *
Qwest Occupational Health Trust     495,000   *   41,991   *
RAM Trading Ltd.     10,500,000   1.7   890,736   *
RBC Alternative Assets, L.P.     250,000   *   21,208   *
Sage Capital     2,850,000   *   241,771   *
SCI Endowment Care Common Trust Fund—First Union     30,000   *   2,544   *
SCI Endowment Care Common Trust Fund—National Fiduciary Services     200,000   *   16,966   *
SCI Endowment Care Common Trust Fund—Suntrust     70,000   *   5,938   *
SGCowen Securities—Convertible Arbitrage     7,000,000   1.1   593,824   *
SPT     1,650,000   *   139,972   *
Stamford, City of, Police Pension Fund     155,000   *   13,148   *
Sterling Invest Co.     3,000,000   *   254,496   *
Syngenta AG     400,000   *   33,932   *
Union Carbide Retirement Account     1,200,000   *   101,798   *
United Food & Commercial Workers Local 1262 & Employers Pension Fund     600,000   *   50,899   *
Univar USA Inc. Retirement Plan     300,000   *   25,449   *
US Bancorp Piper Jaffray     4,000,000   *   339,328   *
Vanguard Convertible Securities Fund, Inc.     10,975,000   1.7   931,031   *
Wachovia Securities, Inc.     33,000,000   5.2   2,799,456   *
Xavex Convertible Arbitrage 2 Fund     200,000   *   16,966   *
Zeneca Holding Trust     575,000   *   48,778   *

42


Zurich Institutional Benchmark Master Fund     400,000   *   33,932   *
Zurich Institutional Benchmark Master Fund     700,000   *   59,382   *
Any other holder of Notes or future transferee, pledgee, donee or successor of any holder(3)(4)                  

*
Less than 1%.

(1)
Assumes conversion of all of the holder's notes at a conversion price of approximately $11.79 per share of common stock. However, this conversion price will be subject to adjustment as described under "Description of the Notes—Conversion Rights." As a result, the amount of common stock issuable upon conversion of the notes may increase or decrease in the future.

(2)
Calculated based on Rule 13d-3(d)(i) of the Exchange Act using 608,653,500 shares of common stock outstanding as of April 25, 2003. In calculating this amount, we treated as outstanding the number of shares of common stock issuable upon conversion of all of that particular holder's notes. However, we did not assume the conversion of any other holder's notes.

(3)
Information about other selling securityholders will be set forth in prospectus supplements, if required.

(4)
Assumes that any other holders of notes, or any future transferees, pledgees, donees or successors of or from any such other holders of notes, do not beneficially own any common stock other than the common stock issuable upon conversion of the notes at the initial conversion rate.

        We prepared this table based on the information supplied to us by the selling securityholders named in the table.

        The selling securityholders listed in the above table may have sold or transferred, in transactions exempt from the registration requirements of the Securities Act of 1933, some or all of their notes since the date on which the information in the above table is presented. Information about the selling securityholders may change from over time. Any changed information will be set forth in prospectus supplements.

        Because the selling securityholders may offer all or some of their notes or the underlying common stock from time to time, we cannot estimate the amount of the notes or underlying common stock that will be held by the selling securityholders upon the termination of any particular offering. See "Plan of Distribution."


PLAN OF DISTRIBUTION

        We will not receive any of the proceeds of the sale of the notes or the common stock issued upon conversion of the notes offered by this prospectus. The notes and the underlying common stock may be sold from time to time to purchasers:

43


        The selling securityholders and any such broker-dealers or agents who participate in the distribution of the notes and the underlying common stock may be deemed to be "underwriters." As a result, any profits on the sale of the notes and the underlying common stock by selling securityholders and any discounts, commissions or concessions received by any such broker-dealers or agents might be deemed to be underwriting discounts and commissions under the Securities Act. If the selling securityholders were to be deemed underwriters, the selling securityholders may be subject to certain statutory liabilities of, including, but not limited to, Sections 11, 12 and 17 of the Securities Act and Rule 10b-5 under the Exchange Act.

        If the notes and the underlying common stock are sold through underwriters or broker-dealers, the selling securityholders will be responsible for underwriting discounts or commissions or agent's commissions.

        The notes and the underlying common stock may be sold in one or more transactions at:

        These sales may be effected in transactions:

        These transactions may include block transactions or crosses. Crosses are transactions in which the same broker acts as an agent on both sides of the trade.

        In connection with sales of the notes and the underlying common stock, the selling securityholders may enter into hedging transactions with broker-dealers. These broker-dealers may in turn engage in short sales of the notes and the underlying common stock in the course of hedging their positions. The selling securityholders may also sell the notes and the underlying common stock short and deliver notes and the underlying common stock to close out short positions, or loan or pledge notes and the underlying common stock to broker-dealers that in turn may sell the notes and the underlying common stock.

        To our knowledge, there are currently no plans, arrangement or understandings between any selling securityholders and any underwriter, broker-dealer or agent regarding the sale of the notes and the underlying common stock by the selling securityholders. Selling securityholders may not sell any or all of the notes and the underlying common stock offered by them pursuant to this prospectus. In addition, we cannot assure you that any such selling securityholder will not transfer, devise or gift the notes and the underlying common stock by other means not described in this prospectus.

44



        Our common stock is listed on the New York Stock Exchange under the symbol "MU." We do not intend to apply for listing of the notes on any securities exchange or for quotation through the Nasdaq National Market. Accordingly, we cannot assure that the notes will be liquid or that any trading market for the notes will develop.

        There can be no assurance that any selling securityholder will sell any or all of the notes and the underlying common stock pursuant to this prospectus. In addition, any notes and the underlying common stock covered by this prospectus that qualify for sale pursuant to Rule 144 or Rule 144A of the Securities Act may be sold under Rule 144 or Rule 144A rather than pursuant to this prospectus.

        The selling securityholders and any other person participating in such distribution will be subject to the Exchange Act. The Exchange Act rules include, without limitation, Regulation M, which may limit the timing of purchases and sales of any of the notes and the underlying common stock by the selling securityholders and any other such person. In addition, Regulation M of the Exchange Act may restrict the ability of any person engaged in the distribution of the notes and the underlying common stock to engage in market-making activities with respect to the particular notes and the underlying common stock being distributed for a period of up to five business days prior to the commencement of such distribution. This may affect the marketability of the notes and the underlying common stock and the ability of any person or entity to engage in market-making activities with respect to the notes and the underlying common stock.

        Pursuant to the registration rights agreement filed as an exhibit to this registration statement, we and the selling securityholders will be indemnified by the other against certain liabilities, including certain liabilities under the Securities Act or will be entitled to contribution in connection with these liabilities.

        We have agreed to pay substantially all of the expenses incidental to the registration, offering and sale of the notes and the underlying common stock to the public other than commissions, fees and discounts of underwriters, brokers, dealers and agents.


VALIDITY OF COMMON STOCK

        The validity of the securities offered by this prospectus will be passed upon for us by Wilson Sonsini Goodrich & Rosati, Professional Corporation, Palo Alto, California.


EXPERTS

        The consolidated financial statements incorporated in this prospectus by reference to the Annual Report on Form 10-K for the year ended August 29, 2002 have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, independent accountants, given on the authority of said firm as experts in auditing and accounting.


AVAILABLE INFORMATION

        We are subject to the informational requirements of the Securities Exchange Act of 1934 and, in accordance therewith, files reports and other information with the SEC. Such reports and other information can be inspected and copied at the Public Reference Section of the SEC located at Room 1024, Judiciary Plaza, 450 Fifth Street, N.W., Washington D.C. 20549. Copies of such material can be obtained from the Public Reference Section of the SEC at prescribed rates. Such material may also be accessed electronically by means of the SEC's home page on the Internet (http://www.sec.gov).

45



PART II

INFORMATION NOT REQUIRED IN THE PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution

        The following table sets forth the expenses, other than any underwriting discount and commissions, in connection with the issuance and distribution of the Securities being registered. All amounts indicated are estimates (other than the registration fee):

Registration fee   $ 51,170
Accounting fees and expenses     60,000
Printing and engraving     100,000
Trustee's fees and expenses     10,000
Legal fees and expenses of the registrant     270,000
Miscellaneous     395,000
   
  Total   $ 886,170
   


Item 15. Indemnification of Directors and Officers

        Section 145 of the Delaware General Corporation Law ("Delaware Law") authorizes a court to award or a corporation's Board of Directors to grant indemnification to directors and officers in terms sufficiently broad to permit such indemnification under certain circumstances for liabilities (including reimbursement for expenses incurred) arising under the Securities Act of 1933, as amended. Our Bylaws provide for mandatory indemnification of its directors, officers, employees and other agents to the maximum extent permitted by Delaware law. We have entered into indemnification agreements with our directors and certain of our officers. The indemnification agreements provide directors and elected officers with further indemnification to the maximum extent permitted by Delaware law.

Item 16. Exhibits

        The following exhibits are filed herewith or incorporated by reference herein:

Exhibit Number

  Exhibit Title
3.1   Certificate of Incorporation of the Company, as amended.(1)
3.2   Bylaws of the Company, as amended.(2)
4.1   Indenture, dated as of February 4, 2003, between the Company and Wells Fargo Bank Minnesota, National Association.(3)
4.2   Form of Note (included in Exhibit 4.1).
5.1   Opinion of Wilson Sonsini Goodrich & Rosati, Professional Corporation.*
10.1   Registration Rights Agreement, dated February 4, 2003, between the Company and the initial purchasers named therein.(3)
23.1   Consent of PricewaterhouseCoopers LLP, independent accountants.
23.2   Consent of Wilson Sonsini Goodrich & Rosati, Professional Corporation (included in Exhibit 5.1).*
24.1   Power of Attorney of certain directors and officers of Micron Technology, Inc. (see page II-4 of initial filing of this Form S-3).
25.1   Form T-1 Statement of Eligibility of Trustee for Indenture under the Trust Indenture Act of 1939.*

(1)
Incorporated by reference to Annual Report on Form 10-K for the fiscal year ended August 31, 2000.

II-1


(2)
Incorporated by reference to Quarterly Report on Form 10-Q for the fiscal quarter ended December 2, 1999.

(3)
Incorporated by reference to Quarterly Report on Form 10-Q for the fiscal quarter ended February 27, 2003.

(*)
To be filed by amendment.


Item 17. Undertakings

        1.    The undersigned registrant hereby undertakes:

provided, however, that the undertakings set forth in clauses (i) and (ii) above shall not apply if the information required to be included in a post-effective amendment by these clauses is contained in periodic reports filed by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that are incorporated by reference in this registration statement.

        2.    The undersigned registrant hereby undertakes, that, for purposes of determining any liability under the Act, each filing of the registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act that is incorporated by reference in the Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

        3.    Insofar as indemnification for liabilities arising under the Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the provisions described under Item 15 above, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Act and is, therefore,

II-2



unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Act and will be governed by the final adjudication of such issue.

        4.    The undersigned registrant hereby undertakes that:

II-3



SIGNATURES

        Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Boise, State of Idaho, on May 1, 2003.

    MICRON TECHNOLOGY, INC.

 

 

By:

 

/s/ W. G. Stover, Jr.

W.G. Stover, Jr.
Vice President of Finance and
Chief Financial Officer


POWER OF ATTORNEY

        KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Steven R. Appleton and W. G. Stover, Jr., and each of them individually, as his true and lawful attorneys-in-fact and agents with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities to sign the Registration Statement filed herewith and any or all amendments to said Registration Statement (including post-effective amendments and registration statements filed pursuant to Rule 462(b) under the Securities Act of 1933, as amended and otherwise), and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission granting unto said attorneys-in-fact and agents the full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing, as full to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or his or her substitute, may lawfully do or cause to be done by virtue thereof.

        Pursuant to the requirements of the Securities Act of 1933, on April 22, 2003, this Registration Statement has been signed by the following persons in the capacities indicated:

Name
  Title
  Date

/s/ Steve R. Appleton

Steven R. Appleton

 

Chairman of the Board of Directors, Chief Executive Officer and President (Principal Executive Officer)

 

May 1, 2003

/s/ W. G. Stover, Jr.

W.G. Stover, Jr.

 

Vice President of Finance and Chief Financial Officer (Principal Financial Officer)

 

May 1, 2003

/s/ James W. Bagley

James W. Bagley

 

Director

 

May 1, 2003

/s/ Robert A. Lothrop

Robert A. Lothrop

 

Director

 

May 1, 2003

/s/ Thomas T. Nicholson

Thomas T. Nicholson

 

Director

 

May 1, 2003

/s/ Gordon C. Smith

Gordon C. Smith

 

Director

 

May 1, 2003

/s/ William P. Weber

William P. Weber

 

Director

 

May 1, 2003

II-4



EXHIBIT INDEX

Exhibit Number
  Exhibit Title
3.1   Certificate of Incorporation of the Company, as amended.(1)
3.2   Bylaws of the Company, as amended.(2)
4.1   Indenture, dated as of February 4, 2003, between the Company and Wells Fargo Bank Minnesota, National Association.(3)
4.2   Form of Note (included in Exhibit 4.1).
5.1   Opinion of Wilson Sonsini Goodrich & Rosati, Professional Corporation.*
10.1   Registration Rights Agreement, dated February 4, 2003, between the Company and the initial purchasers named therein.(3)
23.1   Consent of PricewaterhouseCoopers LLP, independent accountants.
23.2   Consent of Wilson Sonsini Goodrich & Rosati, Professional Corporation (included in Exhibit 5.1).*
24.1   Power of Attorney of certain directors and officers of Micron Technology, Inc. (see page II-4 of initial filing of this Form S-3).
25.1   Form T-1 Statement of Eligibility of Trustee for Indenture under the Trust Indenture Act of 1939.*

(1)
Incorporated by reference to Annual Report on Form 10-K for the fiscal year ended August 31, 2000.

(2)
Incorporated by reference to Quarterly Report on Form 10-Q for the fiscal quarter ended December 2, 1999.

(4)
Incorporated by reference to Quarterly Report on Form 10-Q for the fiscal quarter ended February 27, 2003.

(*)
To be filed by amendment.



QuickLinks

TABLE OF CONTENTS
INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
SUMMARY
THE OFFERING
RATIO OF EARNINGS TO FIXED CHARGES
RISK FACTORS
DISCLOSURE REGARDING FORWARD-LOOKING STATEMENTS
USE OF PROCEEDS
CALL SPREAD OPTIONS
DESCRIPTION OF THE NOTES
DESCRIPTION OF CAPITAL STOCK
UNITED STATES FEDERAL INCOME TAX CONSEQUENCES
SELLING SECURITYHOLDERS
PLAN OF DISTRIBUTION
VALIDITY OF COMMON STOCK
EXPERTS
AVAILABLE INFORMATION
PART II INFORMATION NOT REQUIRED IN THE PROSPECTUS
SIGNATURES
POWER OF ATTORNEY
EXHIBIT INDEX