Star Bulk Carriers Corp. (0001386716) (Filer)

As filed with the Securities and Exchange Commission on October 8, 2026

Registration No. 333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-8

REGISTRATION STATEMENT

UNDER THE

SECURITIES ACT OF 1933

STAR BULK CARRIERS CORP.

(Exact name of Registrant as specified in its charter)

Star Bulk Carriers Corp. 2026 Equity Incentive Plan

(Full title of the plan)

Star Bulk Carriers Corp.

c/o Star Bulk (USA) LLC

Attention: Hamish Norton

358 5^th Ave., Suite 1207, New York, NY 10001

(Name and address of agent for service)

(646) 559-1140

(Telephone number, including area code, of agent for service)

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, 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 of 1933.  ☐

PART I

INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS

Item 1. Plan Information.

The documents containing the information specified in Part I will be sent or given to employees as specified by Rule 428(b)(1) under the Securities Act of 1933, as amended (the “Securities Act”). In accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC” or the “Commission”) and the instructions to Form S-8, such documents are not being filed with the Commission either as part of this registration statement on Form S-8 (this “Registration Statement”) or as prospectuses or prospectus supplements pursuant to Rule 424 promulgated under the Securities Act. These documents and the documents incorporated by reference pursuant to Item 3 of Part II of this Registration Statement, taken together, constitute the prospectus as required by Section 10(a) of the Securities Act.

Item 2. Registrant Information and Employee Plan Annual Information.

Upon written or oral request, any of the documents incorporated by reference in Item 3 of Part II of this Registration Statement, which are also incorporated by reference in the Section 10(a) prospectus, other documents required to be delivered to eligible participants pursuant to Rule 428(b) promulgated under the Securities Act, or additional information about the Star Bulk Carriers Corp. 2026 Equity Incentive Plan, will be available without charge by contacting Star Bulk Carriers Corp. (“Star Bulk” or the “Registrant”) at 40 Agiou Konstantinou Street, 15124, Athens, Greece, telephone: 011-30-210-617-8400.

PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3. Incorporation of Documents by Reference.

The following documents, which have heretofore been filed with, or furnished to, the Commission by the Registrant, are incorporated herein by reference:

All documents subsequently filed by the Registrant pursuant to Sections 13(a), 13(c) or 15(d) of the Exchange Act and prior to the filing of a post-effective amendment to this Registration Statement which indicates that all securities offered have been sold or which deregisters all securities then remaining unsold shall be deemed to be incorporated by reference into this Registration Statement and to be a part hereof from the date of filing such documents. Any statement contained herein or in a document incorporated or deemed to be incorporated herein by reference shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be incorporated herein by reference modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement. Notwithstanding the foregoing, any information that has been or will be furnished (and not filed) with the Commission is not incorporated by reference into this Registration Statement or the accompanying prospectus.

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Item 4. Description of Securities.

Not Applicable.

Item 5. Interests of Named Experts and Counsel.

Not Applicable.

Item 6. Indemnification of Officers and Directors.

The following summary is qualified in its entirety by reference to applicable provisions of the Marshall Islands Business Corporations Act (the “BCA”) and the complete text of the Registrant’s Fourth Amended and Restated Articles of Incorporation (the “Articles”) and the Registrant’s Fourth Amended and Restated Bylaws (the “Bylaws”).

Marshall Islands Business Corporations Act

Section 60(1) of the BCA provides that a corporation may indemnify directors and officers as well as other employees and individuals of such corporation against any threatened, pending or completed action, suit or proceeding whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that he is or was a director or officer of the corporation, or is or was serving at the request of the corporation as a director or officer of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by him in connection with such action, suit or proceeding if he acted in good faith and in a manner he reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe that his conduct was unlawful. Section 60(3) of the BCA further provides that, to the extent a director or officer has been successful on the merits or otherwise in defense of any proceeding covered by the statute, such person must be indemnified against expenses actually and reasonably incurred in connection therewith.

Articles of Incorporation and Bylaws

The Articles and Bylaws provide for indemnification of directors and officers to the fullest extent permitted by law, including payment of expenses in advance of resolution of any such matter. The Articles eliminate the potential personal monetary liability of the directors to the Registrant or its stockholders for breaches of their duties as directors except as otherwise required under the BCA.

Article VI of the Bylaws provides that the Registrant shall indemnify, to the fullest extent permitted by law, directors, officers, employees and agents of the Registrant, as well as persons serving at the request of the Registrant in such capacities for another entity, against expenses, judgments, fines and amounts paid in settlement in connection with certain proceedings. The Bylaws further provide that, to the extent a director, officer, employee or agent has been successful on the merits or otherwise in the defense of a proceeding, such person shall be indemnified against expenses, including attorneys’ fees, actually and reasonably incurred in connection with such proceeding. The Bylaws also establish procedures for determining whether indemnification is proper in a particular circumstance, including determinations by disinterested directors, independent legal counsel or the shareholders, as applicable.

Directors’ and Officers’ Liability Insurance

Section 60(7) of the BCA provides that a corporation shall have the power to purchase and maintain insurance on behalf of any person who is or was a director or officer of the corporation against any liability asserted against the person in any such capacity, or arising out of the person’s status as such, whether or not the corporation would have the power to indemnify the person against such liability under the provisions of the BCA. The Registrant maintains directors’ and officers’ liability insurance policies that, subject to the terms, conditions and coverage limits contained therein, provide coverage to its directors and officers against certain liabilities and expenses incurred by its directors and officers in connection with claims made against them in their capacities as directors and officers of the Registrant.

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Item 7. Exemption from Registration Claimed.

Not Applicable.

Item 8. Exhibits.

The Exhibit Index immediately preceding the exhibits is incorporated herein by reference.

Item 9. Undertakings.

(a) The undersigned Registrant hereby undertakes:

(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:

(i)       To include any prospectus required by Section 10(a)(3) of the Securities Act;

(ii)       To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective Registration Statement; and

(iii)       To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or any material change to such information in the Registration Statement;

provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) above do not apply if 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 Exchange Act that are incorporated by reference in the Registration Statement.

(2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

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

(c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

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SIGNATURES

Pursuant to the requirements of the Securities Act, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Athens, Greece on October 8, 2026.

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POWER OF ATTORNEY

Each person whose signature appears below constitutes and appoints Georgia Mastagaki, Sofia Damigou, Christos Begleris, Simos Spyrou, Hamish Norton, Spyros Capralos and Petros Pappas and each of them, as attorneys-in-fact with full power of substitution for him or her in any and all capacities to do any and all acts and all things and to execute any and all instruments which said attorney and agent may deem necessary or desirable to enable the Registrant to comply with the Securities Act of 1933, as amended, and any rules, regulations and requirements of the Securities and Exchange Commission thereunder, in connection with the registration under the Securities Act of 1933, as amended, of the common shares of the Registrant, including, without limitation, the power and authority to sign the name of each of the undersigned in the capacities indicated below to the registration statement on Form S-8 to be filed with the Securities and Exchange Commission with respect to such common shares, to any and all amendments or supplements to such registration statement, whether such amendments or supplements are filed before or after the effective date of such registration statement, to any related registration statement filed pursuant to Rule 462(b) under the Securities Act of 1933, as amended, and to any and all instruments or documents filed as part of or in connection with such registration statement or any and all amendments thereto, whether such amendments are filed before or after the effective date of such registration statement; and each of the undersigned hereby ratifies and confirms all that such attorney and agent shall do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed by the following persons on October 8, 2026 in the capacities indicated.

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SIGNATURE OF AUTHORIZED REPRESENTATIVE IN THE UNITED STATES

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the undersigned, solely in its capacity as the Registrant’s duly authorized representative in the United States, on October 8, 2026.

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EXHIBIT INDEX

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