As filed with the Securities and Exchange Commission on July 20, 2017

Registration No. 333-[•]

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM F-3
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933

STAR BULK CARRIERS CORP.
(Exact name of Registrant as specified in its charter)

Copies to:

Approximate date of commencement of proposed sale to the public: From time to time after this registration statement becomes effective as determined by market conditions and other factors.

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, check the following box. ☒

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 registration statement pursuant to General Instruction I.C. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. o

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.C. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. o

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933.

Emerging growth company o

If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards† provided pursuant to Section 7(a)(2)(B) of the Securities Act . o

† The term “new or revised financial accounting standard” refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5, 2012.

CALCULATION OF REGISTRATION FEE

(Footnotes continued on next page)

The Registrant hereby amends this document 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 Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.

TABLE OF ADDITIONAL REGISTRANTS

Subject to completion, dated July 20, 2017

PROSPECTUS

$1,000,000,000

Common Shares, Preferred Shares, Debt Securities,
Warrants, Rights and Units
and
39,060,215 Common Shares
offered by the Selling Shareholders

Through this prospectus, we may periodically offer:

We may also offer securities of the types listed above that are convertible or exchangeable into one or more of the securities listed above.

The aggregate offering price of all securities issued and sold by us under this prospectus may not exceed $1,000,000,000. The securities issued under this prospectus may be offered directly or through underwriters, agents or dealers. The names of any underwriters, agents or dealers will be included in a supplement to this prospectus.

In addition, the selling shareholders named in this prospectus, or the Selling Shareholders, may sell in one or more offerings pursuant to this registration statement up to 39,060,215 of our common shares. The Selling Shareholders may sell any or all of these common shares on any stock exchange, market or trading facility on which the shares are traded or in privately negotiated transactions at fixed prices that may be changed, at market prices prevailing at the time of sale or at negotiated prices. Information on the Selling Shareholders and the times and manners in which they may offer and sell our common shares is described under the sections entitled “Selling Shareholders” and “Plan of Distribution” in this prospectus. We will not receive any of the proceeds from the sale of our common shares by the Selling Shareholders.

Our common shares and our 8.00% Senior Notes due 2019 are listed on the Nasdaq Global Select Market under the symbols “SBLK” and “SBLKL,” respectively.

An investment in these securities involves risks. See the section entitled “Risk Factors” beginning on page 3 of this prospectus, and other risk factors contained in any applicable prospectus supplement and in the documents incorporated by reference herein and therein.

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             , 2017

TABLE OF CONTENTS

ABOUT THIS PROSPECTUS

As permitted under the rules of the Securities and Exchange Commission, or the “Commission,” this prospectus incorporates important business information about us that is contained in documents that we have previously filed with the Commission but that are not included in or delivered with this prospectus. You may obtain copies of these documents, without charge, from the website maintained by the Commission at www.sec.gov, as well as other sources. You may also obtain copies of the incorporated documents, without charge, upon written or oral request to Star Bulk Carriers Corp., c/o Star Bulk Management Inc., 40 Agiou Konstantinou Str., Maroussi, 15124, Athens, Greece. See “Where You Can Find Additional Information.”

You should rely only on the information contained or incorporated by reference in this prospectus. Neither we nor the Selling Shareholders authorize any person to provide information other than that provided in this prospectus and the documents incorporated by reference. Neither we nor the Selling Shareholders are making an offer to sell common shares in any state or other jurisdiction where the offer or sale is not permitted. You should not assume that the information contained in this prospectus is accurate as of any date other than the date on the front of this prospectus regardless of its time of delivery, and you should not consider any information in this prospectus or in the documents incorporated by reference herein to be investment, legal or tax advice. We encourage you to consult your own counsel, accountant and other advisors for legal, tax, business, financial and related advice regarding an investment in our securities.

On June 20, 2016, we effected a five-for-one reverse stock split of our common shares (the “June 2016 Reverse Stock Split”). This reverse stock split reduced the number of the Company’s common shares from 219,778,437 to 43,955,659. All share counts presented in this prospectus have been adjusted for the June 2016 Reverse Stock Split.

Unless otherwise indicated or unless the context requires otherwise, all references in this prospectus to “Star Bulk,” the “Company,” “we,” “us,” “our,” or similar references, mean Star Bulk Carriers Corp. and, where applicable, its consolidated subsidiaries, and the “Selling Shareholders” refers to those of our shareholders described in “Selling Shareholders.” In addition, we use the term deadweight, or “dwt,” in describing the size of vessels. Dwt expressed in metric tons, each of which is equivalent to 1,000 kilograms, refers to the maximum weight of cargo and supplies that a vessel can carry. To the extent a Selling Shareholder distributes our common shares to its equity holders, we will add the recipients of those common shares as selling shareholders via a prospectus supplement or post-effective amendment. Any references to such “Selling Shareholder” shall be deemed to be references to each such additional selling shareholder.

ENFORCEABILITY OF CIVIL LIABILITIES

We are a Marshall Islands company, and our principal executive office is located outside of the United States, in Greece. Most of our directors, officers and the experts named in this registration statement reside outside the United States. In addition, a substantial portion of our assets and the assets of certain of our directors, officers and experts are located outside of the United States. As a result, you may have difficulty serving legal process within the United States upon us or any of these persons. You may also have difficulty enforcing, both in and outside the United States, judgments you may obtain in United States courts against us or these persons.

CAUTIONARY STATEMENT REGARDING FORWARD LOOKING STATEMENTS

This prospectus and the documents incorporated herein by reference include “forward-looking statements,” as defined by U.S. federal securities laws, with respect to our financial condition, results of operations and business and our expectations or beliefs concerning future events. Words such as, but not limited to, “believe,” “expect,” “anticipate,” “estimate,” “intend,” “plan,” “targets,” “projects,” “likely,” “would,” “could,” and similar expressions or phrases may identify forward-looking statements.

All forward-looking statements involve risks and uncertainties. The occurrence of the events described, and the achievement of the expected results, depend on many events, some or all of which are not predictable or within our control. Actual results may differ materially from expected results.

In addition, important factors that, in our view, could cause actual results to differ materially from those discussed in the forward-looking statements include:

We have based these statements on assumptions and analyses formed by applying our experience and perception of historical trends, current conditions, expected future developments and other factors we believe are appropriate in the circumstances. All future written and verbal forward-looking statements attributable to us or any person acting on our behalf are expressly qualified in their entirety by the cautionary statements contained or referred to in this section. We undertake no obligation, and specifically decline any obligation, except as required by law, to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. In light of these risks, uncertainties and assumptions, the forward-looking events discussed in this prospectus might not occur.

See the sections entitled “Risk Factors” of this prospectus and in the 2016 20-F, as defined below, which is incorporated herein by reference, for a more complete discussion of these risks and uncertainties and for other risks and uncertainties. These factors and the other risk factors described in this prospectus are not necessarily all of the important factors that could cause actual results or developments to differ materially from those expressed in any of our forward-looking statements. Other unknown or unpredictable factors also could harm our results. Consequently, there can be no assurance that actual results or developments anticipated by us will be realized or, even if substantially realized, that they will have the expected consequences to, or effects on, us. Given these uncertainties, prospective investors are cautioned not to place undue reliance on such forward-looking statements.

WHERE YOU CAN FIND ADDITIONAL INFORMATION

As required by the Securities Act, we filed a registration statement relating to the securities offered by this prospectus with the Commission. This prospectus is a part of that registration statement, which includes additional information.

Government Filings

We file annual and special reports with the Commission. You may read and copy any document that we file and obtain copies at prescribed rates from the Commission’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. You may obtain information on the operation of the Public Reference Room by calling 1 (800) SEC-0330. The Commission maintains a website (http://www.sec.gov) that contains reports, proxy and information statements and other information regarding issuers that file electronically with the Commission. Our filings are also available on our website at http://www.starbulk.com. The information on our website, however, is not, and should not be deemed to be, a part of this prospectus.

This prospectus and any applicable prospectus supplement are part of a registration statement that we filed with the Commission and do not contain all of the information in the registration statement. The full registration statement may be obtained from the Commission or us, as indicated below. Documents establishing the terms of the offered securities are filed as exhibits to the registration statement. Statements in this prospectus or any applicable prospectus supplement about these documents are summaries and each statement is qualified in all respects by reference to the document to which it refers. You should refer to the actual documents for a more complete description of the relevant matters. You may inspect a copy of the registration statement at the Commission’s Public Reference Room in Washington, D.C., as well as through the Commission’s website.

Information Incorporated by Reference

The Commission allows us to “incorporate by reference” information that we file with it. This means that we can disclose important information to you by referring you to those filed documents. The information incorporated by reference is considered to be a part of this prospectus, and certain information that we file later with the Commission prior to the termination of this offering will also be considered to be part of this prospectus and will automatically update and supersede previously filed information, including information contained in this document.

The following documents, filed with or furnished to the SEC, are specifically incorporated by reference and form an integral part of this prospectus:

We are also incorporating by reference all subsequent Annual Reports on Form 20-F that we file with the Commission and certain reports on Form 6-K that we furnish to the Commission after the date of this prospectus (if they state that they are incorporated by reference into this prospectus) until we file a post-effective amendment indicating that the offering of the securities made by this prospectus has been terminated. In all cases, you should rely on the later information over different information included in this prospectus or the applicable prospectus supplement.

You should rely only on the information contained or incorporated by reference in this prospectus and any applicable prospectus supplement. We have not, and any underwriters have not, authorized any other person to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. We are not, and any underwriters are not, making an offer to sell these securities in any jurisdiction where the offer or sale is not permitted. You should assume that the information appearing in this prospectus and any applicable prospectus supplement as well as the information we previously filed with the Commission and incorporated by reference, is accurate as of the dates on the front cover of those documents only. Our business, financial condition and results of operations and prospects may have changed since those dates.

You may request a free copy of the above mentioned filing or any subsequent filing we incorporated by reference to this prospectus by writing or telephoning us at the following address:

Star Bulk Carriers Corp.
c/o Star Bulk Management Inc.
40 Agiou Konstantinou Str.
Maroussi 15124, Athens, Greece
011-30-210-617-8400 (telephone number)

Information provided by the Company

We will furnish holders of our common shares with Annual Reports containing audited financial statements and a report by our independent registered public accounting firm. The audited financial statements will be prepared in accordance with U.S. generally accepted accounting principles. As a “foreign private issuer,” we are exempt from the rules under the Exchange Act prescribing the furnishing and content of proxy statements to shareholders. While we furnish proxy statements to shareholders in accordance with the rules of the Nasdaq Global Select Market (the “Nasdaq”), those proxy statements do not conform to Schedule 14A of the proxy rules promulgated under the Exchange Act. In addition, as a “foreign private issuer,” our officers and directors are exempt from the rules under the Exchange Act relating to short swing profit reporting and liability.

PROSPECTUS SUMMARY

This summary highlights information contained or incorporated by reference in this prospectus and is qualified in its entirety by the more detailed information and financial statements included or incorporated by reference elsewhere in this prospectus. This summary may not contain all of the information that may be important to you. As an investor or prospective investor, you should carefully review the entire prospectus, and the documents incorporated by reference herein, including the section of this prospectus entitled “Risk Factors” and the more detailed information that appears later in this prospectus before making an investment in our common shares. Where we refer to information on a “fully delivered basis,” we are referring to such information after giving effect to the delivery of three newbuilding vessels and one secondhand vessel we have agreed to acquire.

OUR BUSINESS AND OUR FLEET

We are an international shipping company with extensive operational experience that owns and operates a fleet of dry bulk carrier vessels. On a fully delivered basis, we will have a fleet of 74 vessels consisting primarily of Newcastlemax, Capesize as well as Kamsarmax, Ultramax and Supramax vessels with a carrying capacity between 52,055 dwt and 209,537 dwt. Our vessels transport a broad range of major and minor bulk commodities, including ores, coal, grains and fertilizers, along worldwide shipping routes. Our highly experienced executive management team, with over 120 years of combined shipping industry experience, is led by Mr. Petros Pappas, who has more than 39 years of shipping industry experience and has managed approximately 330 vessel acquisitions and dispositions.

Please see the “Operating Fleet” table under the heading “Item 4. Information on the Company—B. Business Overview” in our 2016 20-F for information about our operating and newbuilding fleet as of March 9, 2017 and section of Recent Developments below.

For further information on the history of our company, our business strategies and competitive position in the dry bulk industry please refer to “Item 4. Information on the Company—A. History and Development of the Company” and “Our Competitive Strengths” and “Our Business Strategies” under the heading “Item 4. Information on the Company—B. Business Overview” in our 2016 20-F.

OUR FOUNDER AND HIS TRACK RECORD

Our founder and Chief Executive Officer, Mr. Pappas, has an established track record in the dry bulk industry, with more than 39 years of experience and involvement in approximately 330 vessel acquisitions and dispositions. Entities under his management and control owned up to 30 vessels in 2001, most of which were acquired during the first quarter of 1997, the second quarter of 1998 and the second quarter of 2001, periods corresponding to low asset values and freight rates. Substantially all of these vessels were sold by the end of 2005, during a period of record high vessel values and levels of the Baltic Dry Index (“BDI”) (a daily average of charter rates for key dry bulk routes).

Mr. Pappas has extensive experience in operating and investing in shipping, including through his principal shipping operations and investment vehicle, Oceanbulk Maritime S.A. (“Oceanbulk Maritime”). For further information regarding Mr. Pappas’ track record and the Company’s management team, please refer to “Item 6. Directors, Senior Management and Employees” of our 2016 20-F.

OAKTREE

Oaktree is our largest shareholder. Oaktree Capital Management, L.P. (together with its affiliates, “Oaktree”) is a leader among global investment managers specializing in alternative investments, with $100.5 billion in assets under management as of December 31, 2016. The firm emphasizes an opportunistic, value-oriented and risk-controlled approach to investments in distressed debt, corporate debt (including high yield debt and senior loans), control investing, convertible securities, real estate and listed equities. Headquartered in Los Angeles, the firm has over 900 employees and offices in 18 cities worldwide. See “Item 7 “Major Shareholders and Related Party Transactions—B. Related Party Transactions—Oaktree Shareholders Agreement.” of the 2016 20-F for a discussion on the various limitations on the transfer and voting of our common shares by Oaktree.

CORPORATE AND OTHER INFORMATION

We are a Marshall Islands corporation with principal executive offices at 40 Agiou Konstantinou Street, 15124, Athens Greece. Our telephone number at that address is 011-30-210-617-8400. We maintain a website on the Internet at http://www.starbulk.com. The information on our website is not incorporated by reference into this prospectus and does not constitute a part of this prospectus. We were incorporated in the Marshall Islands on December 13, 2006, as a wholly-owned subsidiary of Star Maritime Acquisition Corp., or “Star Maritime,” which was a special purpose acquisition corporation. We merged with Star Maritime on November 30, 2007 and commenced operations on December 3, 2007, which was the date we took delivery of our first vessel.

RECENT DEVELOPMENTS

On January 24, 2017 and February 2, 2017, we issued and sold an aggregate 6,310,272 common shares pursuant to a private placement, at a price of $8.154 per share. The aggregate proceeds to us, net of private placement agent’s fees and expenses, were approximately $50.6 million, raised for general corporate purposes. Further information can be found in the Report on Form 6-K furnished to the Commission on January 24, 2017 (the “February 2017 Private Placement). The resale of the common shares sold in the February 2017 Private Placement is covered by this prospectus. See “Plan of Distribution.”

On February 9, 2017, we entered into a definitive agreement with a third party to sell the vessel Star Eleonora at market terms. The vessel was delivered to its new owner in March 2017.

On February 22, 2017, the Board of Directors adopted the 2017 Equity Incentive Plan (the “2017 Plan”) and reserved for issuance 950,000 common shares thereunder. The terms and conditions of the 2017 Plan are substantially similar to the terms and conditions of our previous equity incentive plans.

In March 2017, we took delivery of the Newcastlemex vessels Star Virgo (ex-HN 1371) and Star Ariadne (ex-HN 1360), which as further described in the 2016 20-F, are financed under separate bareboat charters with CSSC, accounted for as a capital lease.

In March 2017, we entered into definitive agreements to acquire two modern Kamsarmax vessels for an aggregate consideration of approximately $30.3 million. The vessels, Star Charis and Star Suzanna, were delivered to us in March 2017 and May 2017, respectively.

During the first half of 2017, we issued 476,300 common shares to our directors, officers and employees under the 2015 Equity Incentive Plan and the 2016 Equity Incentive Plan as defined below.

In June 2017, we entered into a definitive agreement to acquire a Supramax dry bulk carrier, Diva, with expected delivery in July 2017, for an aggregate consideration of $10.5 million. The acquisition will be partly financed through debt secured from a financial institution.

In June 2017, we entered into a definitive agreement with ABN AMRO N.V., for a financing of an aggregate amount of $30.8 million. The facility consists of two tranches. The first tranche of $16.0 million was used to partially finance the acquisition cost of the new Kamsarmax vessels, Star Charis and Star Suzanna, discussed above. The second tranche of $14.8 million was used to prepay in full all outstanding amounts under the Heron Vessels Facility (as defined in the 2016 20-F), which was terminated. The second tranche is secured by the vessels Star Angelina and Star Gwyneth, which secured the Heron Vessels Facility.

In July 2017, following the refinancing of the Heron Vessels Facility and the execution of Supplemental Agreements with all Lenders under our other Senior Secured Credit Facilities, we completed the Restructuring Transactions in their entirety (all capitalized terms referred to in this paragraph are defined in the 2016 20-F).

RISK FACTORS

Investing in our securities involves a high degree of risk. You should carefully consider the discussion of risks under the heading “Item 3. Key Information—D. Risk Factors” in the 2016 20-F and the other documents that are incorporated by reference in this prospectus. Please see the section of this prospectus entitled “Incorporation by Reference of Certain Documents.” In addition, you should also consider carefully the risks set forth under the heading “Risk Factors” in any prospectus supplement before investing in the securities offered by this prospectus. The occurrence of one or more of those risk factors could adversely impact our business, financial condition or results of operations.

Any of the referenced risks could materially and adversely affect our business, financial condition, results of operations or cash flows. In such a case, you may lose all or part of your original investment.

RATIO OF EARNINGS TO FIXED CHARGES

The following table sets forth our unaudited ratio of earnings to fixed charges for each of the last five fiscal years ended December 31.

USE OF PROCEEDS

Unless we specify otherwise in any prospectus supplement, we may use the net proceeds from the sale of securities offered by this prospectus for capital expenditures, repayment of indebtedness, working capital, repurchases of our securities as permitted under our debt agreements, to make vessel or other acquisitions or for general corporate purposes or any combination thereof. We will not receive any proceeds from sales of securities by the Selling Shareholders.

PER SHARE MARKET PRICE INFORMATION

Since December 3, 2007 our common shares have traded on the Nasdaq Global Select Market under the symbol “SBLK.” You should carefully review the high and low prices of Star Bulk common shares in the tables for the months, quarters and years indicated under the heading Item 9. “The Offer and Listing” in the 2016 20-F, which is incorporated by reference herein.

The table below sets forth the high and low prices for each of the periods indicated for our common shares as reported by the NASDAQ Global Select Market.

CAPITALIZATION

The following table sets forth our capitalization table as of December 31, 2016, on

Other than the adjustments described above, there have been no significant adjustments to our capitalization since December 31, 2016. This table should be read in conjunction with the section entitled “Operating and Financial Review and Prospects” and the consolidated financial statements and related notes included in the 2016 20-F. If necessary, updated information on our capitalization will be included in a prospectus supplement.

SELLING SHAREHOLDERS

Based solely upon information furnished to us by the Selling Shareholders, the following table sets forth information with respect to the beneficial ownership of our common shares held as of the date of this prospectus (or to be held, as noted below) by the Selling Shareholders. The Selling Shareholders are offering an aggregate of up to 39,060,215 of our common shares, which were previously acquired (or agreed to be acquired, pursuant to binding agreements, as noted below) in private transactions and in the January 2015 Equity Offering, the May 2015 Equity Offering, the September 2016 Equity Offering (each as defined below under “Description of Capital Stock—Share History”) and the February 2017 Private Placement. The Selling Shareholders may sell some, all or none of their shares covered by this prospectus.

PLAN OF DISTRIBUTION

We may sell or distribute the securities included in this prospectus, and the Selling Shareholders may sell our common shares, to or through underwriters, agents, brokers or dealers, in private transactions, at market prices prevailing at the time of sale, at prices related to the prevailing market prices, at negotiated prices, at fixed prices (which may be changed), or at varying prices determined at the time of sale.

In addition, we may sell some or all of our securities included in this prospectus, and the Selling Shareholders may sell our common shares included in this prospectus, through:

In addition, we or any Selling Shareholders may enter into option, share lending or other types of transactions that require us or such Selling Shareholders, as applicable, to deliver our securities to an underwriter or a broker-dealer, who will then resell or transfer the securities under this prospectus. We or any Selling Shareholder also may enter into hedging transactions with respect to our securities. For example, we or any Selling Shareholder may:

Any Selling Shareholder will act independently of us in making decisions with respect to the timing, manner and size of each sale of common shares covered by this prospectus. The Selling Shareholders might not sell any securities under this prospectus. In addition, any securities covered by this prospectus that qualify for sale pursuant to Rule 144 under the Securities Act may be sold under Rule 144 rather than pursuant to this prospectus.

We or any Selling Shareholder may enter into derivative transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If the applicable prospectus supplement indicates, in connection with those derivatives, the third parties may sell securities covered by this prospectus and the applicable prospectus supplement, including in short sale transactions. If so, the third party may use securities pledged by us or any Selling Shareholder or borrowed from us, any Selling Shareholder or others to settle those sales or to close out any related open borrowings of stock, and may use securities received from us or any Selling Shareholder in settlement of those derivatives to close out any related open borrowings of stock. The third party in such sale transactions will be an underwriter and, if not identified in this prospectus, will be identified in the applicable prospectus supplement (or a post-effective amendment). In addition, we or any Selling Shareholder may otherwise loan or pledge securities to a financial institution or other third party that in turn may sell the securities short using this prospectus. Such financial institution or other third party may transfer its economic short position to investors in our securities or the securities of any Selling Shareholders, as applicable, or in connection with a concurrent offering of other securities.

Common shares may also be exchanged for satisfaction of the Selling Shareholders’ obligations or other liabilities to their creditors. Such transactions may or may not involve broker-dealers.

The Selling Shareholders and any broker-dealers or other persons acting on our behalf or on the behalf of the Selling Shareholders that participate with us or the Selling Shareholders in the distribution of the securities may be deemed to be underwriters, and any commissions received or profit realized by them on the resale of the securities may be deemed to be underwriting discounts and commissions under the Securities Act of 1933, as amended, or the Securities Act. As a result, we have informed the Selling Shareholders that Regulation M, promulgated under the Exchange Act, may apply to sales by the Selling Shareholders in the market.

Some of the underwriters, dealers or agents used by us or the Selling Shareholders in any offering of securities under this prospectus may be customers of, engage in transactions with, and perform services for us and/or such Selling Shareholders, as applicable, or affiliates of ours and/or theirs, as applicable, in the ordinary course of business. Underwriters, dealers, agents and other persons may be entitled under agreements which may be entered into with us and/or the Selling Shareholders to indemnification against and contribution toward certain civil liabilities, including liabilities under the Securities Act, and to be reimbursed by us and/or such Selling Shareholders for certain expenses. As of the date of this prospectus, we are not a party to any agreement, arrangement or understanding between any broker or dealer and us with respect to the offer or sale of the securities pursuant to this prospectus.

To the extent required by the Securities Act, a prospectus supplement will be distributed at the time that any particular offering of securities is made, setting forth the terms of the offering, including the aggregate number of securities being offered; the purchase price of the securities and the proceeds we and/or any Selling Shareholders will receive from the sale of the securities; the initial offering price of the securities; the names of any underwriters, dealers or agents; any discounts, commissions and other items constituting compensation from us; any discounts, commissions or concessions allowed or re-allowed or paid to underwriters, dealers or agents; any securities exchanges on which the securities may be listed; the method of distribution of the securities; the terms of any agreement, arrangement or understanding entered into with the underwriters, brokers or dealers; and any other information we think is important. Furthermore, we, our executive officers, our directors and the Selling Shareholders may agree, subject to certain exemptions, that for a certain period from the date of the prospectus supplement under which the securities are offered, we and they will not, without the prior written consent of an underwriter, offer, sell, contract to sell, pledge or otherwise dispose of any of our common shares or any securities convertible into or exchangeable for our common shares. However, an underwriter, in its sole discretion, may release any of the securities subject to these lock-up agreements at any time without notice. We expect an underwriter to exclude from these lock-up agreements securities exercised and/or sold pursuant to trading plans entered into by any selling shareholder pursuant to Rule 10b5-1 under the Exchange Act, that are in place at the time of an offering pursuant to this prospectus and any applicable prospectus supplement hereto that provide for periodic sales of the Selling Shareholders’ securities on the basis of parameters described in such trading plans.

Underwriters or agents could make sales in privately negotiated transactions and/or any other method permitted by law, including sales deemed to be an at-the-market offering as defined in Rule 415 promulgated under the Securities Act, which includes sales made directly on or through the Nasdaq Global Select Market, the existing trading market for our common shares, or sales made to or through a market maker other than on an exchange.

We will bear costs relating to the securities offered and sold by us and the Selling Shareholders under this Registration Statement.

As a result of requirements of the Financial Industry Regulatory Authority, or “FINRA,” formerly the National Association of Securities Dealers, Inc., the maximum commission or discount to be received by any FINRA member or independent broker/dealer may not be greater than eight percent (8%) of the gross proceeds received by us or any Selling Shareholder for the sale of any securities being registered pursuant to Rule 415 promulgated by the Commission under the Securities Act. If more than 5% of the net proceeds of any offering of common shares made under this prospectus will be received by a FINRA member participating in the offering or affiliates or associated persons of such a FINRA member, the offering will be conducted in accordance with FINRA Rule 5121.

DESCRIPTION OF CAPITAL STOCK

Authorized Share Capital

Under our fourth amended and restated articles of incorporation, or our “Articles,” our authorized capital stock consists of 300,000,000 common shares, par value $0.01 per share, and 25,000,000 preferred shares, par value $0.01 per share, none of which were issued as of the date of this prospectus.

Common Shares

As of June 30, 2017, we had 63,415,479 common shares outstanding out of 300,000,000 shares authorized to be issued. Each outstanding common share entitles the holder to one vote on all matters submitted to a vote of shareholders. Subject to preferences that may be applicable to any outstanding preferred shares, holders of common shares are entitled to receive ratably all dividends, if any, declared by our board of directors (the “Board of Directors”) out of funds legally available for dividends. Upon our dissolution or liquidation or the sale of all or substantially all of our assets, after payment in full of all amounts required to be paid to creditors and to the holders of our preferred shares having liquidation preferences, if any, the holders of our common shares will be entitled to receive pro rata our remaining assets available for distribution. Holders of our common shares do not have conversion, redemption or preemptive rights to subscribe to any of our securities. All outstanding common shares are fully paid and non-assessable. The rights, preferences and privileges of holders of our common shares are subject to the rights of the holders of any preferred shares which we may issue in the future.

Share History

Reverse Stock Split

On June 20, 2016, we effected the June 2016 Reverse Stock Split. The June 2016 Reverse Stock Split reduced the number of the Company’s common shares from 219,778,437 to 43,955,659. All share counts presented in this prospectus have been adjusted for the June 2016 Reverse Stock Split.

Transactions

In July 2014, we issued as consideration 10,820,840 common shares in the July 2014 Transactions (as defined in the 2016 20-F), consisting of 9,679,153 common shares for the merger of Oaktree OBC Holdings LLC and Millennia Limited Liability Company in our two merger subsidiaries, 718,546 common shares for the acquisition of Dioriga Shipping Co. and Positive Shipping Company and 423,141 common shares as partial consideration for the acquisition of the Heron Vessels (as defined in the 2016 20-F).

In August 2014, we agreed to issue the Excel Vessel Share Consideration (as defined in the 2016 20-F) of approximately 5,983,462 common shares under the terms of the Excel Transactions (as defined in the 2016 20-F). As of December 31, 2014, we had issued all shares, out of which 5,131,885 common shares were issued in 2014 as part of the Excel Vessel Share Consideration and the remaining 851,577 shares were issued in 2015.

We issued 4,520 common shares during the year ended December 31, 2014, as part of the consideration for the acquisition of 33% of the total outstanding common stock of Interchart Shipping Inc.

During the year ended December 31, 2015 and 2016 we issued 34,234 common shares and 138,453 common shares, respectively, as consideration for the third and the fourth installment payable to Oceanbulk Maritime S.A (as defined in the 2016 20-F) as commission for the shipbuilding contracts of certain of our newbuilding vessels.

Equity Offerings

On January 14, 2015, we issued and sold 9,800,084 common shares in an underwritten public offering for aggregate proceeds for aggregate proceeds, net of underwriting commissions and offering expenses, of $242.2 million, which we used for the financing of our newbuilding program and general corporate purposes (the “January 2015 Equity Offering”).

On May 18, 2015, we issued and sold 11,250,000 common shares in an underwritten public offering for aggregate proceeds, net of underwriting commissions and offering expenses, of $175.6 million, which we used for the financing of our newbuilding program and general corporate purposes (the “May 2015 Equity Offering”).

On September 20, 2016, we issued and sold 11,976,745 common shares in an underwritten public offering for aggregate proceeds, net of underwriting commissions and offering expenses, of $50.3 million, raised for the financing of our newbuilding program and general corporate purposes (the “September 2016 Equity Offering”).

On January 24, 2017 and February 2, 2017, we issued and sold an aggregate 6,310,272 common shares pursuant to a private placement for aggregate proceeds, net of private placement agent’s fees and expenses, of $50.6, raised for general corporate purposes (the “February 2017 Private Placement”).

Equity Incentive Plans

On February 20, 2014, April 13, 2015, May 9, 2016 and February 22, 2017, respectively, our board of directors approved the 2014 Equity Incentive Plan (the “2014 Equity Incentive Plan”) ,the 2015 Equity Incentive Plan (the “2015 Equity Incentive Plan”), the 2016 Equity Incentive Plan (the “2016 Equity Incentive Plan”) and the 2017 Equity Incentive Plan (the “2017 Equity Incentive Plan”) (collectively, the “Equity Incentive Plans), under which officers, key employees, directors, and consultants of the Company and its subsidiaries are eligible to receive options to acquire common shares, stock appreciation rights, restricted stock and other stock-based or stock-denominated awards. We reserved a total of 86,000 common shares, 280,000 common shares, 940,000 common shares and 950,000 common shares for issuance) under the Equity Incentive Plans, subject to further adjustment for changes in capitalization as provided in the plans. The purpose of the Equity Incentive Plans is to encourage ownership of shares by, and to assist us in attracting, retaining and providing incentives to, our officers, key employees, directors and consultants, whose contributions to us are or may be important to our success and to align the interests of such persons with our shareholders. The various types of incentive awards that may be issued under the Equity Incentive Plans enable us to respond to changes in compensation practices, tax laws, accounting regulations and the size and diversity of our business. The Equity Incentive Plans are administered by our compensation committee, or such other committee of our board of directors as may be designated by the board. The Equity Incentive Plans permit issuance of restricted shares, grants of options to purchase common shares, stock appreciation rights, restricted stock, restricted stock units and unrestricted stock.

Under the terms of the Equity Incentive Plans, stock options and stock appreciation rights granted under the Equity Incentive Plans have an exercise price per common share equal to the fair market value of a common share on the date of grant, unless otherwise determined by the administrator of the Equity Incentive Plans, but in no event will the exercise price be less than the fair market value of a common share on the date of grant. Options and stock appreciation rights are exercisable at times and under conditions as determined by the administrator of the Equity Incentive Plans, but in no event will they be exercisable later than ten years from the date of grant.

The administrator of the Equity Incentive Plans may grant common shares of restricted stock and awards of restricted stock units subject to vesting and forfeiture provisions and other terms and conditions as determined by the administrator of the Equity Incentive Plans. Upon the vesting of a restricted stock unit, the award recipient will be paid an amount equal to the number of restricted stock units that then vest multiplied by the fair market value of a common share on the date of vesting, which payment may be paid in the form of cash or common shares or a combination of both, as determined by the administrator of the Equity Incentive Plans. The administrator of the Equity Incentive Plans may grant dividend equivalents with respect to grants of restricted stock units.

Adjustments may be made to outstanding awards in the event of a corporate transaction or change in capitalization or other extraordinary event. In the event of a “change in control” (as defined in the Equity Incentive Plans), unless otherwise provided by the administrator of the Equity Incentive Plans in an award agreement, awards then outstanding shall become fully vested and exercisable in full.

The board of directors may amend or terminate the Equity Incentive Plans and may amend outstanding awards, provided that no such amendment or termination may be made that would materially impair any rights, or materially increase any obligations, of a grantee under an outstanding award. Shareholders’ approval of Equity Incentive Plans amendments may be required in certain definitive, pre-determined circumstances if required by applicable rules of a national securities exchange or the Commission. Unless terminated earlier by the board of directors, the Equity Incentive Plans will expire ten years from the date on which the Equity Incentive Plans was adopted by the board of directors.

The terms and conditions of the Equity Incentive Plans are substantially similar to those of the previous plans. All of the common shares that were reserved for issuance under the 2014 Equity Incentive Plan and the

2015 Equity Incentive Plan were issued and vested in full, whereas there are 80,000 common shares unvested from the 2016 Equity Incentive Plan and 944,000 common shares unvested from the 2017 Equity Incentive Plan, as of the date of this prospectus.

During the years 2014, 2015 and 2016 and as of the date of this prospectus, pursuant to the Equity Incentive Plans, we have granted the following securities:

As of the date of this prospectus, 58,574 common shares are available under the 2017 Equity Incentive Plan.

Preferred Stock

Under the terms of our Articles, our Board of Directors has the authority, without any further vote or action by our shareholders, to issue up to 25,000,000 preferred shares. Our Board of Directors is authorized to provide for the issuance of preferred shares in one or more series with designations as may be stated in the resolution or resolutions providing for the issue of such shares of preferred stock. At the time that any series of our preferred shares are authorized, our Board of Directors will fix the dividend rights, any conversion rights, any voting rights, redemption provisions, liquidation preferences and any other rights, preferences, privileges and restrictions of that series, as well as the number of shares constituting that series and their designation. Our Board of Directors could, without stockholder approval, cause us to issue preferred shares which have voting, conversion and other rights that could adversely affect the holders of our common shares or make it more difficult to effect a change in control. Our preferred shares could be used to dilute the share ownership of persons seeking to obtain control of us and thereby hinder a possible takeover attempt which, if our stockholders were offered a premium over the market value of their shares, might be viewed as being beneficial to our stockholders. In

addition, our preferred shares could be issued with voting, conversion and other rights and preferences which would adversely affect the voting power and other rights of holders of our common shares. Our Board of Directors may issue preferred shares on terms calculated to discourage, delay or prevent a change of control in us or the removal of our management.

Directors

Our directors are elected by the affirmative vote of a majority of the shares of stock represented at the meeting. There is no provision for cumulative voting.

Our Board of Directors must consist of at least three members. Shareholders may change the number of directors only by amending the bylaws which requires the affirmative vote of holders of 70% or more of the outstanding shares of capital stock entitled to vote generally in the election of directors. The Board of Directors may change the number of directors, but may not reduce the number to be less than three directors, only by a vote of not less than 66 ²∕3% of the entire Board of Directors. At each annual meeting, directors to replace those directors whose terms expire at such annual meeting shall be elected to hold office until the third succeeding annual meeting. Each director shall serve his respective term of office until his successor shall have been duly elected and qualified, except in the event of his death, resignation, removal, or the earlier termination of his term of office. Our Board of Directors has the authority to fix the amounts which shall be payable to the members of the Board of Directors for attendance at any meeting or for services rendered to us.

Interested Transactions

Our Third Amended and Restated Bylaws, or “Bylaws,” provide that no contract or transaction between us and one or more of its directors or officers, or between us and any other corporation, partnership, association or other organization in which one or more of our directors or officers are directors or officers, or have a financial interest, shall be void or voidable solely for this reason, or solely because the director or officer is present at or participates in the meeting of our Board of Directors or committee thereof which authorizes the contract or transaction, or solely because his or her or their votes are counted for such purpose, if: (i) the material facts as to his or her relationship or interest and as to the contract or transaction are disclosed or are known to our Board of Directors or the committee and our Board of Directors or committee in good faith authorizes the contract or transaction by the affirmative votes of a majority of the disinterested directors, or, if the votes of the disinterested directors are insufficient to constitute an act of our Board of Directors as defined in Section 55 of the Business Corporation Act, or the MIBCA, by unanimous vote of the disinterested directors; or (ii) the material facts as to his relationship or interest and as to the shareholders entitled to vote thereon, and the contract or transaction is specifically approved in good faith by vote of the shareholders; or (iii) the contract or transaction is fair as to us as of the time it is authorized, approved or ratified, by our Board of Directors, a committee thereof or the shareholders. Common or interested directors may be counted in determining the presence of a quorum at a meeting of our Board of Directors or of a committee which authorizes the contract or transaction.

Shareholder Meetings

Under our Bylaws, annual shareholder meetings will be held at a time and place selected by our Board of Directors. The meetings may be held in or outside of the Marshall Islands. Our Board of Directors may set a record date between 10 and 60 days before the date of any meeting to determine the shareholders that will be eligible to receive notice and vote at the meeting.

Dissenters’ Rights of Appraisal and Payment

Under the MIBCA, our shareholders have the right to dissent from various corporate actions, including any merger or consolidation or sale of all or substantially all of our assets not made in the usual course of our business, and receive payment of the fair value of their shares. However, the right of a dissenting shareholder to receive payment of the appraised fair value of his shares is not available under the MIBCA if for the shares of any class or series of stock, which shares or depository receipts in respect thereof, at the record date fixed to determine the shareholders entitled to receive notice of and to vote at the meeting of the shareholders to act upon the agreement of merger or consolidation, were either (i) listed on a securities exchange or admitted for trading on an interdealer quotation system or (ii) held of record by more than 2,000 holders. In the event of any further amendment of our amended and restated articles of incorporation, a shareholder also has the right to dissent and

receive payment for the shareholder’s shares if the amendment alters certain rights in respect of those shares. The dissenting shareholder must follow the procedures set forth in the MIBCA to receive payment. In the event that we and any dissenting shareholder fail to agree on a price for the shares, the MIBCA procedures involve, among other things, the institution of proceedings in any appropriate court in any jurisdiction in which our shares are primarily traded on a local or national securities exchange.

Shareholders’ Derivative Actions

Under the MIBCA, any of our shareholders may bring an action in our name to procure a judgment in our favor, also known as a derivative action, provided that the shareholder bringing the action is a holder of our common shares both at the time the derivative action is commenced and at the time of the transaction to which the action relates.

Limitations on Liability and Indemnification of Officers and Directors

The MIBCA authorizes corporations to limit or eliminate the personal liability of directors and officers to corporations and their shareholders for monetary damages for breaches of directors’ fiduciary duties. Our Articles and Bylaws include a provision that eliminates the personal liability of directors for monetary damages for actions taken as a director to the fullest extent permitted by law.

Our Bylaws provide that we must indemnify our directors and officers to the fullest extent authorized by law. We are also expressly authorized to advance certain expenses (including attorneys’ fees and disbursements and court costs) to our directors and officers and carry directors’ and officers’ insurance policies providing indemnification for our directors, officers and certain employees for some liabilities. We believe that these indemnification provisions and insurance are useful to attract and retain qualified directors and executive officers.

The limitation of liability and indemnification provisions in our Articles and Bylaws may discourage shareholders from bringing a lawsuit against directors for breach of their fiduciary duty. These provisions may also have the effect of reducing the likelihood of derivative litigation against directors and officers, even though such an action, if successful, might otherwise benefit us and our shareholders. In addition, your investment may be adversely affected to the extent we pay the costs of settlement and damage awards against directors and officers pursuant to these indemnification provisions.

Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons, we have been advised that in the opinion of the Securities and Exchange Commission, such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable.

There is currently no pending material litigation or proceeding involving any of our directors, officers or employees for which indemnification is sought.

Anti-Takeover Effect of Certain Provisions of our Articles and Bylaws

Several provisions of our Articles and Bylaws, which are summarized below, may have anti-takeover effects. These provisions are intended to avoid costly takeover battles, lessen our vulnerability to a hostile change of control and enhance the ability of our Board of Directors to maximize shareholder value in connection with any unsolicited offer to acquire us. However, these anti-takeover provisions, which are summarized below, could also discourage, delay or prevent (i) the merger or acquisition of our Company by means of a tender offer, a proxy contest or otherwise that a shareholder may consider in its best interest and (ii) the removal of incumbent officers and directors.

Classified Board of Directors

Our Articles provide for the division of our Board of Directors into three classes of directors, with each class as nearly equal in number as possible, serving staggered, three year terms. Approximately one-third of our Board of Directors will be elected each year. This classified board provision could discourage a third party from making a tender offer for our common shares or attempting to obtain control of us. It could also delay shareholders who do not agree with the policies of our Board of Directors from removing a majority of our Board of Directors for two years.

Blank Check Preferred Stock

Our Articles authorize our Board of Directors to establish one or more series of preferred stock and to determine, with respect to any series of preferred stock, the terms and rights of that series, including:

Business Combinations

Although the MIBCA does not contain specific provisions regarding “business combinations” between corporations organized under the laws of the Republic of Marshall Islands and “interested shareholders,” we have included these provisions in our Articles. Our Articles contain provisions which prohibit us from engaging in a business combination with an interested shareholder for a period of three years after the date of the transaction in which the person became an interested shareholder, unless:

For purposes of these provisions, a “business combination” includes mergers, consolidations, exchanges, asset sales, leases and other transactions resulting in a financial benefit to the interested shareholder and an “interested shareholder” is any person or entity that beneficially owns 20% or more of the shares of our outstanding voting stock and any person or entity affiliated with or controlling or controlled by that person or entity.

Election and Removal of Directors

Our Articles prohibit cumulative voting in the election of directors. Our Articles and Bylaws require parties other than the Board of Directors to give advance written notice of nominations for the election of directors. Our Articles and Bylaws also provide that our directors may be removed only for cause and only upon the affirmative vote of the holders of 70% or more of the outstanding shares of our capital stock entitled to vote generally in the election of directors. These provisions may discourage, delay or prevent the removal of incumbent officers and directors.

Limited Actions by Shareholders

Our Bylaws provide that any action required or permitted to be taken by our shareholders must be effected at an annual meeting of shareholders or by the unanimous written consent of our shareholders. Our Bylaws also provide that our Board of Directors, Chairman, or President may call special meetings of our shareholders and the business transacted at the special meeting is limited to the purposes stated in the notice. Accordingly, shareholders are prevented from calling a special meeting and shareholder consideration of a proposal may be delayed until the next annual meeting.

Supermajority Provisions

The MIBCA generally provides that the affirmative vote of a majority of the outstanding shares entitled to vote at a meeting of shareholders is required to amend a corporation’s articles of incorporation, unless the articles of incorporation requires a greater percentage. Our Articles provide that the following provisions in the Articles may be amended only by an affirmative vote of 70% or more of the outstanding shares of our capital stock entitled to vote generally in the election of directors:

Advance Notice Requirements for Shareholders Proposals and Director Nominations

Our Articles and Bylaws provide that shareholders seeking to nominate candidates for election as directors or to bring business before an annual meeting of shareholders must provide timely notice of their proposal in writing to the corporate secretary. Generally, to be timely, a shareholder’s notice must be received at our principal executive offices not less than 120 days nor more than 180 days prior to the one year anniversary of the immediately preceding year’s annual meeting of shareholders. Our Articles and Bylaws also specify requirements as to the form and content of a shareholder’s notice. These provisions may impede a shareholder’s ability to bring matters before an annual meeting of shareholders or make nominations for directors at an annual meeting of shareholders.

DESCRIPTION OF DEBT SECURITIES

We may issue debt securities from time to time in one or more series, under one or more indentures, each dated as of a date on or prior to the issuance of the debt securities to which it relates.

We may issue senior debt securities from time to time in series under an indenture dated November 6, 2014, among us and U.S. Bank National Association, as Trustee (as amended or supplemented from time to time, the “Senior Indenture”). The Senior Indenture is Exhibit 4.1 to our report on Form 6-K, furnished to the Commission on November 7, 2014. We may issue subordinated debt securities pursuant to a subordinated indenture, between us and the trustee named in therein (the “Subordinated Indenture” and, together with the Senior Indenture, the “Indentures” and, each an “Indenture”). The Subordinated Indenture will be filed either as exhibit to an amendment to this Registration Statement, or as an exhibit to a Securities Exchange Act of 1934, or Exchange Act, report that will be incorporated by reference to the Registration Statement or a prospectus supplement. We will refer to any or all of these reports as “subsequent filings.”

The Senior Indenture is, and the Subordinated Indenture will be, subject to and governed by the Trust Indenture Act. The aggregate principal amount of debt securities which may be issued under the Senior Indenture is unlimited. The Senior Indenture provides that the specific terms of any series of debt securities must be set forth in or determined pursuant to, an authorizing resolution, as defined in the applicable prospectus supplement, and/or a supplemental indenture, if any, relating to such series. The aggregate principal amount of debt securities which may be issued under the Subordinated Indenture will be unlimited. The Subordinated Indenture will contain the specific terms of any series of debt securities or provide that those terms must be set forth in or determined pursuant to, an authorizing resolution, as defined in the applicable prospectus supplement, and/or a supplemental indenture, if any, relating to such series.

The following description of the terms of the debt securities sets forth certain general terms and provisions. The statements below are not complete and are subject to, and are qualified in their entirety by reference to, all of the provisions of the Indentures. The specific terms of any debt securities that we may offer, including any modifications of, or additions to, the general terms described below as well as any applicable material U.S. federal income tax considerations concerning the ownership of such debt securities will be described in the applicable prospectus supplement or supplemental indenture. Accordingly, for a complete description of the terms of a particular issue of debt securities, the general description of the debt securities set forth below should be read in conjunction with the applicable prospectus supplement and Indenture, as amended or supplemented from time to time.

General

Neither Indenture limits the amount of debt securities which may be issued, and each Indenture provides that debt securities may be issued up to the aggregate principal amount from time to time. The debt securities may be issued in one or more series. The senior debt securities are unsecured and rank in parity in right of payment with all of our other unsecured and unsubordinated indebtedness. Each series of subordinated debt securities will be unsecured and subordinated in right of payment to all present and future senior indebtedness of debt securities will be described in an accompanying prospectus supplement.

You should read the subsequent filings relating to the particular series of debt securities for the following terms of the offered debt securities:

Unless otherwise indicated in subsequent filings with the Commission relating to each of the Indentures, principal, premium and interest will be payable and the debt securities will be transferable at the corporate trust office of the applicable trustee. Unless other arrangements are made or set forth in subsequent filings or a supplemental indenture, principal, premium and interest will be paid by checks mailed to the holders at their registered addresses.

Unless otherwise indicated in subsequent filings with the Commission, the debt securities will be issued only in fully registered form without coupons, in denominations of $1,000 or any integral multiple thereof. No service charge will be made for any transfer or exchange of the debt securities, but we may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection with these debt securities.

Some or all of the debt securities may be issued as discounted debt securities, bearing no interest or interest at a rate which at the time of issuance is below market rates, to be sold at a substantial discount below the stated principal amount. United States federal income consequences and other special considerations applicable to any discounted securities will be described in subsequent filings with the Commission relating to those securities.

We refer you to applicable subsequent filings with respect to any deletions or additions or modifications from the description contained in this prospectus.

Senior Debt

We may issue senior debt securities under the Senior Indenture. These senior debt securities would rank on an equal basis in right of payment with all our other unsecured debt except subordinated debt.

Subordinated Debt

We may issue subordinated debt securities under the Subordinated Indenture. Subordinated debt would rank subordinate and junior in right of payment, to the extent set forth in the Subordinated Indenture, to all our senior debt (both secured and unsecured).

In general, the holders of all senior debt are first entitled to receive payment of the full amount unpaid on senior debt before the holders of any of the subordinated debt securities are entitled to receive a payment on account of the principal or interest on the indebtedness evidenced by the subordinated debt securities in certain events.

If we default in the payment of any principal of, or premium, if any, or interest on any senior debt when it becomes due and payable after any applicable grace period, then, unless and until the default is cured or waived or ceases to exist, we cannot make a payment on account of or redeem or otherwise acquire the subordinated debt securities.

If there is any insolvency, bankruptcy, liquidation or other similar proceeding relating to us or our property, then all senior debt must be paid in full before any payment may be made to any holders of subordinated debt securities.

Furthermore, if we default in the payment of the principal of and accrued interest on any subordinated debt securities that is declared due and payable upon an event of default under the Subordinated Indenture, holders of all our senior debt will first be entitled to receive payment in full in cash before holders of such subordinated debt can receive any payments.

Senior debt means:

but senior debt does not include:

Covenants

Any series of offered debt securities may have covenants in addition to or differing from those included in the applicable Indenture which will be described in subsequent filings prepared in connection with the offering of such securities, limiting or restricting, among other things:

Modification of the Indentures

Each Indenture and the rights of the respective holders may be modified by us only with the consent of holders of not less than a majority in aggregate principal amount of the outstanding debt securities of all series under the respective Indenture affected by the modification, taken together as a class. But no modification that:

Events of Default

Each Indenture defines an event of default for the debt securities of any series as being any one of the following events:

An event of default of one series of debt securities does not necessarily constitute an event of default with respect to any other series of debt securities.

There may be such other or different events of default as described in an applicable subsequent filing with respect to any class or series of offered debt securities.

In case an event of default occurs and continues for the debt securities of any series, the applicable trustee or the holders of not less than 25% in aggregate principal amount of the debt securities then outstanding of that series may declare the principal and accrued but unpaid interest of the debt securities of that series to be due and payable. Any event of default for the debt securities of any series which has been cured may be waived by the holders of a majority in aggregate principal amount of the debt securities of that series then outstanding.

Each Indenture requires us to file annually after debt securities are issued under that Indenture with the applicable trustee a written statement signed by two of our officers as to the absence of material defaults under the terms of that Indenture. Each Indenture provides that the applicable trustee may withhold notice to the holders of any default if it considers it in the interest of the holders to do so, except notice of a default in payment of principal, premium or interest.

Subject to the duties of the trustee in case an event of default occurs and continues, each Indenture provides that the trustee is under no obligation to exercise any of its rights or powers under that Indenture at the request, order or direction of holders unless the holders have offered to the trustee reasonable indemnity. Subject to these provisions for indemnification and the rights of the trustee, each Indenture provides that the holders of a majority in principal amount of the debt securities of any series then outstanding 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 as long as the exercise of that right does not conflict with any law or the Indenture.

Defeasance and Discharge

The terms of each Indenture provide us with the option to be discharged from any and all obligations in respect of the debt securities issued thereunder upon the deposit with the trustee, in trust, of money or U.S. government obligations, or both, which through the payment of interest and principal in accordance with their terms will provide money in an amount sufficient to pay any installment of principal, premium and interest on, and any mandatory sinking fund payments in respect of, the debt securities on the stated maturity of the payments in accordance with the terms of the debt securities and the Indenture governing the debt securities. This right may only be exercised if, among other things, we have received from, or there has been published by, the United States Internal Revenue Service a ruling or there has been a change in the applicable United Stated federal income tax law to the effect that such a discharge will not be deemed, or result in, a taxable event with respect to holders. This discharge would not apply to our obligations to register the transfer or exchange of debt securities, to replace stolen, lost or mutilated debt securities, to maintain paying agencies and hold moneys for payment in trust.

Defeasance of Certain Covenants

The terms of the debt securities provide us with the right to omit complying with specified covenants and that specified events of default described in a subsequent filing will not apply. In order to exercise this right, we will be required to deposit with the trustee money or U.S. government obligations, or both, which through the

payment of interest and principal will provide money in an amount sufficient to pay principal, premium, if any, and interest on, and any mandatory sinking fund payments in respect of, the debt securities on the stated maturity of such payments in accordance with the terms of the debt securities and the Indenture governing such debt securities. We will also be required to deliver to the trustee an opinion of counsel to the effect that we have received from, or there has been published by, the United States Internal Revenue Service a ruling to the effect that the deposit and related covenant defeasance will not cause the holders of such series to recognize income, gain or loss for federal income tax purposes.

A subsequent filing may further describe the provisions, if any, of any particular series of offered debt securities permitting a discharge defeasance.

Global Securities

The debt securities of a series may be issued in whole or in part in the form of one or more global securities that will be deposited with, or on behalf of, a depository identified in an applicable subsequent filing and registered in the name of the depository or a nominee for the depository. In such a case, one or more global securities will be issued in a denomination or aggregate denominations equal to the portion of the aggregate principal amount of outstanding debt securities of the series to be represented by the global security or securities. Unless and until it is exchanged in whole or in part for debt securities in definitive certificated form, a global security may not be transferred except as a whole by the depository for the global security to a nominee of the depository or by a nominee of the depository to the depository or another nominee of the depository or by the depository or any nominee to a successor depository for that series or a nominee of the successor depository and except in the circumstances described in an applicable subsequent filing.

We expect that the following provisions will apply to depository arrangements for any portion of a series of debt securities to be represented by a global security. Any additional or different terms of the depository arrangement will be described in an applicable subsequent filing.

Upon the issuance of any global security, and the deposit of that global security with or on behalf of the depository for the global security, the depository will credit, on its book-entry registration and transfer system, the principal amounts of the debt securities represented by that global security to the accounts of institutions that have accounts with the depository or its nominee. The accounts to be credited will be designated by the underwriters or agents engaging in the distribution of the debt securities or by us, if the debt securities are offered and sold directly by us. Ownership of beneficial interests in a global security will be limited to participating institutions or persons that may hold interest through such participating institutions. Ownership of beneficial interests by participating institutions in the global security will be shown on, and the transfer of the beneficial interests will be effected only through, records maintained by the depository for the global security or by its nominee. Ownership of beneficial interests in the global security by persons that hold through participating institutions will be shown on, and the transfer of the beneficial interests within the participating institutions will be effected only through, records maintained by those participating institutions. The laws of some jurisdictions may require that purchasers of securities take physical delivery of the securities in certificated form. The foregoing limitations and such laws may impair the ability to transfer beneficial interests in the global securities.

So long as the depository for a global security, or its nominee, is the registered owner of that global security, the depository or its nominee, as the case may be, will be considered the sole owner or holder of the debt securities represented by the global security for all purposes under the applicable Indenture. Unless otherwise specified in an applicable subsequent filing and except as specified below, owners of beneficial interests in the global security will not be entitled to have debt securities of the series represented by the global security registered in their names, will not receive or be entitled to receive physical delivery of debt securities of the series in certificated form and will not be considered the holders thereof for any purposes under the Indenture. Accordingly, each person owning a beneficial interest in the global security must rely on the procedures of the depository and, if such person is not a participating institution, on the procedures of the participating institution through which the person owns its interest, to exercise any rights of a holder under the Indenture.

The depository may grant proxies and otherwise authorize participating institutions to give or take any request, demand, authorization, direction, notice, consent, waiver or other action which a holder is entitled to give or take under the applicable Indenture. We understand that, under existing industry practices, if we request any action of holders or any owner of a beneficial interest in the global security desires to give any notice or

take any action a holder is entitled to give or take under the applicable Indenture, the depository would authorize the participating institutions to give the notice or take the action, and participating institutions would authorize beneficial owners owning through such participating institutions to give the notice or take the action or would otherwise act upon the instructions of beneficial owners owning through them.

Unless otherwise specified in applicable subsequent filings, payments of principal, premium and interest on debt securities represented by a global security registered in the name of a depository or its nominee will be made by us to the depository or its nominee, as the case may be, as the registered owner of the global security.

We expect that the depository for any debt securities represented by a global security, upon receipt of any payment of principal, premium or interest, will credit participating institutions’ accounts with payments in amounts proportionate to their respective beneficial interests in the principal amount of the global security as shown on the records of the depository. We also expect that payments by participating institutions to owners of beneficial interests in the global security held through those participating institutions will be governed by standing instructions and customary practices, as is now the case with the securities held for the accounts of customers registered in street names, and will be the responsibility of those participating institutions. None of us, the trustees or any agent of ours or the trustees will have any responsibility or liability for any aspect of the records relating to or payments made on account of beneficial interests in a global security, or for maintaining, supervising or reviewing any records relating to those beneficial interests.

Unless otherwise specified in the applicable subsequent filings, a global security of any series will be exchangeable for certificated debt securities of the same series only if:

Upon any exchange, owners of beneficial interests in the global security or securities will be entitled to physical delivery of individual debt securities in certificated form of like tenor and terms equal in principal amount to their beneficial interests, and to have the debt securities in certificated form registered in the names of the beneficial owners, which names are expected to be provided by the depository’s relevant participating institutions to the applicable trustee.

In the event that the Depository Trust Company, or “DTC,” acts as depository for the global securities of any series, the global securities will be issued as fully registered securities registered in the name of Cede & Co., DTC’s partnership nominee.

DTC is a member of the U.S. Federal Reserve System, a limited-purpose trust company under New York State banking law and a registered clearing agency with the Commission. Established in 1973, DTC was created to reduce costs and provide clearing and settlement efficiencies by immobilizing securities and making “book-entry” changes to ownership of the securities. DTC provides securities movements for the net settlements of the National Securities Clearing Corporation, or “NSCC,” and settlement for institutional trades (which typically involve money and securities transfers between custodian banks and broker/dealers), as well as money market instruments.

DTC is a subsidiary of The Depository Trust & Clearing Company, or “DTCC.” DTCC is a holding company established in 1999 to combine DTC and NSCC. DTCC, through its subsidiaries, provides clearing, settlement and information services for equities, corporate and municipal bonds, government and mortgage backed securities, money market instruments and over the-counter derivatives. In addition, DTCC is a leading processor of mutual funds and insurance transactions, linking funds and carriers with their distribution networks. DTCC’s customer base extends to thousands of companies within the global financial services industry. DTCC serves brokers, dealers, institutional investors, banks, trust companies, mutual fund companies, insurance carriers, hedge funds and other financial intermediaries—either directly or through correspondent relationships.

DTCC is industry-owned by its customers who are members of the financial community, such as banks, broker/dealers, mutual funds and other financial institutions. DTCC operates on an at-cost basis, returning excess revenue from transaction fees to its member firms. All services provided by DTC are regulated by the Commission.

The 2017 DTCC Board of Directors is composed of 20 directors serving one-year terms. Twelve directors are representatives of clearing agency participants, including broker/dealers, custodian and clearing banks, and investment institutions; two directors are designated by DTCC’s preferred shareholders, which are NYSE Euronext and FINRA; four directors are from non-participants; and the remaining two are the non-executive chairman and the chief executive officer and president of DTCC. All of the Board members except those designated by the preferred shareholders are elected annually.

To facilitate subsequent transfers, the debt securities may be registered in the name of DTC’s nominee, Cede & Co. The deposit of the debt securities with DTC and their registration in the name of Cede & Co. will effect no change in beneficial ownership. DTC has no knowledge of the actual beneficial owners of the debt securities. DTC’s records reflect only the identity of the direct participating institutions to whose accounts debt securities are credited, which may or may not be the beneficial owners. The participating institutions remain responsible for keeping account of their holdings on behalf of their customers.

Delivery of notices and other communications by DTC to direct participating institutions, by direct participating institutions to indirect participating institutions, and by direct participating institutions and indirect participating institutions to beneficial owners of debt securities are governed by arrangements among them, subject to any statutory or regulatory requirements as may be in effect.

Neither DTC nor Cede & Co. consents or votes with respect to the debt securities. Under its usual procedures, DTC mails a proxy to the issuer as soon as possible after the record date. The proxy assigns Cede & Co.’s consenting or voting rights to those direct participating institution to whose accounts the debt securities are credited on the record date.

If applicable, redemption notices shall be sent to Cede & Co. If less than all of the debt securities of a series represented by global securities are being redeemed, DTC’s practice is to determine by lot the amount of the interest of each direct participating institutions in that issue to be redeemed.

To the extent that any debt securities provide for repayment or repurchase at the option of the holders thereof, a beneficial owner shall give notice of any option to elect to have its interest in the global security repaid by us, through its participating institution, to the applicable trustee, and shall effect delivery of the interest in a global security by causing the direct participating institution to transfer the direct participating institution’s interest in the global security or securities representing the interest, on DTC’s records, to the applicable trustee. The requirement for physical delivery of debt securities in connection with a demand for repayment or repurchase will be deemed satisfied when the ownership rights in the global security or securities representing the debt securities are transferred by direct participating institutions on DTC’s records.

DTC may discontinue providing its services as securities depository for the debt securities at any time. Under such circumstances, in the event that a successor securities depository is not appointed, debt security certificates are required to be printed and delivered as described above.

We may decide to discontinue use of the system of book-entry transfers through the securities depository. In that event, debt security certificates will be printed and delivered as described above.

DESCRIPTION OF WARRANTS

We may issue warrants to purchase our debt or equity securities or securities of third parties or other rights, including rights to receive payment in cash or securities based on the value, rate or price of one or more specified commodities, currencies, securities or indices, or any combination of the foregoing. Warrants may be issued independently or together with any other securities and may be attached to, or separate from, such securities. Each series of warrants will be issued under a separate warrant agreement to be entered into between us and a warrant agent. The terms of any warrants to be issued and a description of the material provisions of the applicable warrant agreement will be set forth in the applicable prospectus supplement.

The applicable prospectus supplement will describe the following terms of any warrants in respect of which this prospectus is being delivered:

DESCRIPTION OF RIGHTS

We may issue rights to purchase our equity securities. These rights may be issued independently or together with any other security offered by this prospectus and may or may not be transferable by the stockholder receiving the rights in the rights offering. In connection with any rights offering, we may enter into a standby underwriting agreement with one or more underwriters pursuant to which the underwriter will purchase any securities that remain unsubscribed for upon completion of the rights offering.

The applicable prospectus supplement relating to any rights will describe the terms of the offered rights, including, where applicable, the following:

The description in the applicable prospectus supplement of any rights we offer will not necessarily be complete and will be qualified in its entirety by reference to the applicable rights certificate or rights agreement, which will be filed with the Commission if we offer rights. For more information on how you can obtain copies of any rights certificate or rights agreement if we offer rights, see “Where You Can Find Additional Information” of this prospectus. We urge you to read the applicable rights certificate, the applicable rights agreement and any applicable prospectus supplement in their entirety.

DESCRIPTION OF UNITS

As specified in the applicable prospectus supplement, we may issue units consisting of one or more warrants, debt securities, which may be guaranteed by one or more of our subsidiaries, preferred shares, common shares or any combination of such securities. The applicable prospectus supplement will describe:

EXPENSES

The following are the estimated expenses of the issuance and distribution of the securities being registered under the registration statement of which this prospectus forms a part, all of which will be paid by us.

LEGAL MATTERS

Certain matters of United States law will be passed upon for us and the Selling Shareholders by Paul, Weiss, Rifkind, Wharton & Garrison, LLP, New York, New York. Certain matters of Marshall Islands law and Liberian law will be passed upon for us by Seward & Kissel LLP, New York, New York.

EXPERTS

The consolidated financial statements of Star Bulk Carriers Corp. appearing in Star Bulk Carriers Corp.’s Annual Report (Form 20-F) for the year ended December 31, 2016 and the effectiveness of Star Bulk Carriers Corp.’s internal control over financial reporting as of December 31, 2016, have been audited by Ernst & Young (Hellas) Certified Auditors Accountants S.A., independent registered public accounting firm, as set forth in their reports thereon, included therein, and incorporated herein by reference. Such consolidated financial statements are incorporated herein by reference in reliance upon such reports given on the authority of such firm as experts in accounting and auditing. The address of Ernst & Young (Hellas) Certified Auditors Accountants S.A. is 8B Chimarras, 15125, Maroussi, Greece and is registered as a corporate body with the public register for company auditors-accountants kept with the Body of Certified-Auditors-Accountants, or SOEL, Greece with registration number 107.

STAR BULK CARRIERS CORP.
   
$1,000,000,000
   
Common Shares, Preferred Shares, Debt Securities,
Warrants, Rights and Units    
and
39,060,215 Common Shares
offered by the Selling Shareholders

PROSPECTUS

                     , 2017

Part II
Information Not Required in the Prospectus

Indemnification of Directors and Officers and Limitation of Liability

There is currently no pending material litigation or proceeding involving any of the Registrant’s directors, officers or employees for which indemnification is sought.

Section 60 of the Marshall Islands Business Corporations Act (the “MIBCA”) provides as follows:

Indemnification of directors and officers:

The exhibit index at the end of this registration statement identifies the exhibits which are included in this registration statement and are incorporated herein by reference (the “Exhibit Index”).

Provided, however, that paragraphs (a)(1)(i), (a)(1)(ii) and (a)(1)(iii) of this section do not apply if the registration statement is on Form S-3 or Form F-3 and the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to section 13 or section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

information required to be presented by Article 3 of Regulation S-X is not set forth in the prospectus, to deliver, or cause to be delivered to each person to whom the prospectus is sent or given, the latest quarterly report that is specifically incorporated by reference in the prospectus to provide such interim financial information.

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 F-3 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Athens, Country of Greece, on July 20, 2017.

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints each of Georgia Mastagaki, Sophia Damigou, Christos Begleris, Simos Spyrou, Hamish Norton, Spyros Capralos and Petros Pappas his true and lawful attorney-in-fact and agent, with full powers of substitution and re-substitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any or all amendments (including post-effective amendments) to this Registration Statement, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully for all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his substitute, may lawfully do or cause to be done by virtue thereof.

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons on July 20, 2017 in the capacities indicated.

AUTHORIZED UNITED STATES REPRESENTATIVE

Pursuant to the requirement of the Securities Act of 1933, the undersigned, the duly undersigned representative in the United States of each Registrant, has signed this registration statement in the City of Newark, State of Delaware, on July 20, 2017.

EXHIBIT INDEX