Filed by KKR & Co. L.P.

Pursuant to Rule 425 under the

Securities Act of 1933, as amended

Subject Company:  KKR Private Equity Investors, L.P.

Registration No.: 333-144335

KKR Private Equity Investors Reports its Financial Results for the First Quarter Ended March 31, 2009

NAV per Unit of $12.82 as of March 31, 2009

Guernsey, Channel Islands, May 15, 2009 — KKR Private Equity Investors, L.P. (Euronext Amsterdam: KPE), a Guernsey limited partnership that is invested predominantly in private equity investments identified by Kohlberg Kravis Roberts & Co. (“KKR”), today reported its financial results for the quarter ended March 31, 2009.  As of March 31, 2009, KPE’s net asset value (“NAV”) was $2,626.1 million, or $12.82 per unit.

George R. Roberts, Co-Founder of KKR and Co-Chairman of KPE’s Managing Partner’s Board of Directors, commented, “We believe that our performance during the first quarter is attributable in large part to our focus on operational improvement, cost reduction and efficiency initiatives, our progress in implementing appropriate capital structures for our portfolio companies, our adherence to procedures for monitoring our investments and our work in helping our companies adapt to the changing global regulatory environment.”

Henry R. Kravis, Co-Founder of KKR and Co-Chairman of KPE’s Managing Partner’s Board of Directors, added, “We remain prudently on guard in terms of the operations of our portfolio companies given the environment. The work of our company management teams, private equity industry teams, KKR Capstone team and capital markets team to improve company operations, address refinancing issues and proactively optimize capital structures allows us to, in general, lower debt to earnings ratios, cut costs, control cash flows and opportunistically access the capital markets.  These initiatives contributed to the slight rise in KPE’s NAV for the first quarter.”

Results of Operations

Operating results of KPE for the quarter ended March 31, 2009 are highlighted as follows:

·                  Net unrealized appreciation on investments and foreign currency transactions was $116.9 million.  Of the total net unrealized appreciation during the quarter ended March 31, 2009, $84.0 million represented the reversal of previously recorded net unrealized depreciation, primarily from the sale of certain interests in co-investments and the remainder of the opportunistic investments in public equities, related derivative instruments and a fixed income investment.  The most

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significant changes in the unrealized fair value of investments excluding these reversals from December 31, 2008 to March 31, 2009 were:

·                  An increase of $58.1 million in the value of the investment in Dollar General Corporation, which was marked from 1.1 times cost as of December 31, 2008 to 1.3 times cost as of March 31, 2009;

·                  An increase of $52.1 million in the value of the investment in HCA Inc., which was marked from 0.8 times cost as of December 31, 2008 to original cost as of March 31, 2009;

·                  An increase of $24.4 million in the value of the convertible senior notes investment in Sun Microsystems, Inc. (“Sun”);

·                  An unrealized gain of $23.0 million related to investments in KKR Strategic Capital Institutional Fund, Ltd. (“SCF”);

·                  A decrease of $73.0 million in the value of the investment in Energy Future Holdings Corp., which was marked from 0.7 times cost as of December 31, 2008 to 0.5 times cost as of March 31, 2009;

·                  A decrease of $15.2 million in the value of the investment in Capmark Financial Group Inc., which was marked from 0.1 times cost as of December 31, 2008 to nil as of March 31, 2009;

·                  A decrease of $15.2 million in the value of the overall investment in ProSiebenSat.1 Media AG, which was marked on both a Euro and U.S. dollar basis from 0.1 times cost as of December 31, 2008 to less than 0.1 times cost as of March 31, 2009; and

·                  A decrease of $13.9 million in the value of the investment in KION Group GmbH , which was marked on both a Euro and U.S. dollar basis from 0.2 times cost as of December 31, 2008 to 0.1 times cost as of March 31, 2009.

·                  Net realized loss on investments and foreign currency was $93.9 million.  The net realized loss was primarily comprised of $39.8 million from the sale of certain interests in co-investments, $37.1 million from the sale of opportunistic investments, and $28.1 million from the sale of investments by SCF, offset by a realized gain of $11.1 million related to foreign currency transactions.  The co-investment sale resulted in proceeds of $200.4 million to the Investment Partnership, in exchange for certain interests with an original cost basis of $240.3 million that were valued at $211.0 million as of March 31, 2009.  The weighted average discount to fair value for the sale was 5.3 percent.

·                  Net investment loss was $15.6 million, which principally represented interest expense, management fees and general and administrative expenses, offset by interest income.

·                  The net increase in net assets resulting from operations was $7.4 million and KPE’s total return was 0.3 percent during the quarter.

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Investments

KPE invests its capital as the sole limited partner of KKR PEI Investments, L.P. (the “Investment Partnership”).  As of March 31, 2009, the fair value of the Investment Partnership’s portfolio, which consisted primarily of private equity investments, net of related financing, was $2,759.8 million, as follows:

·                  Investments of $1,163.0 million in the following KKR private equity funds:

·                  Co-investments of $1,220.5 million in the following portfolio companies of KKR’s private equity funds:

·                  Negotiated equity investments of $317.8 million, net of related financing, in the following companies:

·                  Non-private equity fund investment of $58.5 million in SCF.

Please refer to the schedule of investments as of March 31, 2009, included elsewhere in this release, for detailed amounts of the investments listed above.

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Commitments

As of March 31, 2009, the Investment Partnership’s remaining capital commitments related to limited partner interests in KKR’s private equity funds were as follows, with amounts in millions:

We expect that the unfunded capital commitments presented above will be called over a period of several years.

Subsequent to March 31, 2009, the Investment Partnership submitted subscription documents with respect to a limited partner interest in the KKR Annex Fund representing a capital commitment of $17.6 million, which, if accepted, would reduce its commitment to the KKR European Fund III by the same amount. There can be no assurance whether or when the KKR Annex Fund will be consummated and therefore whether or when the subscription will be accepted.

Liquidity and Capital Resources

As of March 31, 2009, the Investment Partnership had a cash balance of $638.4 million and had $926.2 million outstanding on its $1.0 billion five-year senior secured credit facility established on June 11, 2007.

Subsequent to March 31, 2009 and through May 14, 2009, the Investment Partnership received $200.4 million from the sale of certain interests in co-investments. Taking into account this receipt, the Investment Partnership’s pro forma cash balance was approximately $838.8 million.

The Investment Partnership’s availability for further borrowings under the credit facility was $69.1 million as of May 14, 2009 or $23.5 million assuming that the commitment held by Lehman Commercial Paper Inc., which has declared bankruptcy, will not fund any part of its remaining commitments.

On April 20, 2009, Sun and Oracle Corporation (“Oracle”) announced that they entered into a definitive agreement under which Oracle will acquire Sun common stock for $9.50 per share in cash.  The terms of the Investment Partnership’s senior convertible notes investment in Sun provide that the Investment Partnership has the right to require Sun to purchase such senior convertible notes at par upon the consummation of a fundamental change of Sun, which the Investment Partnership believes includes the acquisition of Sun by Oracle.  There can be no assurance whether or when the pending acquisition of Sun by Oracle will be consummated or whether or when such senior convertible notes will actually be repurchased. If the senior convertible notes are repurchased, the Investment Partnership’s related $350.0 million financing plus accrued interest will be also settled upon such repurchase.

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Business Environment

Although certain segments of the global capital market have improved since December 31, 2008, worldwide economies and other segments of the global capital market remain weak and, in general, credit remains scarce and confidence in global financial systems and economic performance has not been fully restored. As a result, sources of liquidity may be more difficult to obtain in the current market environment. The state of the financial markets may also impact other aspects of the business, operations, investments or prospects of KPE and the Investment Partnership in ways that are currently unforeseeable.

Business Combination Transaction

KKR & Co. L.P. and the independent directors of KPE’s general partner continue their process of evaluating the advisability of the pending acquisition of all of the assets and liabilities of KPE by KKR & Co. L.P (the “Transaction”).  As of April 24, 2009, KPE and KKR & Co. L.P. amended the purchase and sale agreement to extend to August 31, 2009 from April 27, 2009, the date by which the Transaction is required to be completed before either party may, subject to certain conditions, terminate such agreement.

Financial Report and Other Information

KPE’s interim financial report, which includes its unaudited financial statements and the unaudited consolidated financial statements of the Investment Partnership, is available on its website (www.kkrprivateequityinvestors.com).  KPE encourages investors to carefully read these documents accompanying this news release.

KPE’s annual information document may be obtained from KPE’s paying agent, ING Bank N.V., at Van Heenvlietlaan 220, 1083 CN Amsterdam, The Netherlands.

Information for Investors — Teleconference and Webcast

KPE will discuss its financial results on a teleconference to be broadcast live on the Internet on Friday, May 15, 2009 at 7:00 p.m. CEST (Amsterdam) / 6:00 p.m. BST (Guernsey) / 1:00 p.m. EDT (New York City). A webcast (listen only) of the teleconference can be accessed via the Investor Relations section of KPE’s website at www.kkrprivateequityinvestors.com.

About KPE

KKR Private Equity Investors, L.P. (Euronext Amsterdam: KPE) is a Guernsey limited partnership that seeks to create long-term value by participating predominantly in private equity investments identified by Kohlberg Kravis Roberts & Co. (“KKR”).  As of March 31, 2009, KPE’s investment portfolio was substantially comprised of limited partner interests in six KKR private equity funds, co-investments in 13 companies alongside the private equity funds and three negotiated equity investments.  KPE is governed by its general partner’s board of directors, which is required to have a majority of independent directors, and makes its investments as the sole limited partner of another Guernsey limited partnership, KKR PEI Investments, L.P.

The common units and related restricted depositary units of KPE are subject to a number of ownership and transfer restrictions.  Information concerning these ownership and transfer restrictions is included in the Investor Relations section of KPE’s website at www.kkrprivateequityinvestors.com.

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No Offering Statement

This release does not constitute an offer of securities for sale in the United States. Securities may not be offered or sold in the United States absent registration or an exemption from registration.  Any public offering of securities to be made in the United States will be made by means of a prospectus that may be obtained from KPE and that will contain detailed information about KPE and management, as well as financial statements.

Forward-Looking Statements

This release may contain certain forward-looking statements with respect to the financial condition, results of operations, liquidity, investments, business, net asset value and prospects of KPE and the transaction with KKR & Co. L.P.  By their nature, forward-looking statements involve risk and uncertainty, because they relate to events and depend on circumstances that will occur in the future, and there are many factors that could cause actual results and developments to differ materially from those expressed or implied by these forward-looking statements.  KPE does not undertake to update any of these forward-looking statements.

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Additional Information about the Transaction and Where to Find It

This release contains information in respect of the proposed transaction involving KKR & Co. L.P. and KPE. In connection with the proposed transaction, KKR & Co. L.P. has filed with the Securities Exchange Commission (“SEC”) an amendment to its existing Registration Statement on Form S-1 (file no. 333-144335) and will be filing other documents regarding the proposed transaction with the SEC.  INVESTORS AND SECURITY HOLDERS OF KPE ARE URGED TO READ THE REGISTRATION STATEMENT AND OTHER DOCUMENTS FILED WITH THE SEC CAREFULLY IN THEIR ENTIRETY BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION. The final prospectus contained in the registration statement will be mailed or otherwise disseminated to the holders of KPE’s common units. Holders of KPE’s common units will be able to obtain free copies of the final prospectus (when available) and other documents filed with the SEC by KKR & Co. L.P. through the web site maintained by the SEC at www.sec.gov. Free copies of the final prospectus (when available) and other documents filed with the SEC can also be obtained by directing a request to KKR & Co. L.P., 9 W. 57th Street, Suite 4200, New York, New York 10019, Attention: Investor Relations.

FINANCIAL SCHEDULES FOLLOW

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KKR PRIVATE EQUITY INVESTORS, L.P.

STATEMENTS OF ASSETS AND LIABILITIES (UNAUDITED)

(Amounts in thousands, except unit and per unit amounts)

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KKR PRIVATE EQUITY INVESTORS, L.P.

STATEMENTS OF OPERATIONS (UNAUDITED)
(Amounts in thousands)

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KKR PRIVATE EQUITY INVESTORS, L.P.

STATEMENTS OF CHANGES IN NET ASSETS (UNAUDITED)
(Amounts in thousands, except common units)

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KKR PRIVATE EQUITY INVESTORS, L.P.

STATEMENTS OF CASH FLOWS (UNAUDITED)
(Amounts in thousands)

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KKR PEI INVESTMENTS, L.P. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF ASSETS AND LIABILITIES (UNAUDITED)

(Amounts in thousands)

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KKR PEI INVESTMENTS, L.P. AND SUBSIDIARIES

CONSOLIDATED SCHEDULE OF INVESTMENTS (UNAUDITED)

 (Amounts in thousands, except percentage amounts)

Continued on the following page.

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KKR PEI INVESTMENTS, L.P. AND SUBSIDIARIES

CONSOLIDATED SCHEDULE OF INVESTMENTS (UNAUDITED), CONTINUED

 (Amounts in thousands, except percentage amounts)

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KKR PEI INVESTMENTS, L.P. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)

(Amounts in thousands)

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KKR PEI INVESTMENTS, L.P. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN NET ASSETS (UNAUDITED)

 (Amounts in thousands)

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KKR PEI INVESTMENTS, L.P. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

(Amounts in thousands)

Continued on the following page.

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KKR PEI INVESTMENTS, L.P. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED), CONTINUED

(Amounts in thousands)

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