UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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FORM 6-K

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REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of July 2026

Commission File Number 001-42543

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ROBIN ENERGY LTD.

(Translation of registrant’s name into English)

223 Christodoulou Chatzipavlou Street

Hawaii Royal Gardens

3036 Limassol, Cyprus

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(Address of principal executive office)

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Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

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INFORMATION CONTAINED IN THIS FORM 6-K REPORT

Attached to this report on Form 6-K as Exhibit 99.1 is a copy of Robin Energy Ltd.’s (the “Company”) press release, dated July 7, 2026, announcing a one-for-fifteen (1-for-15) reverse stock split of the Company’s common stock, par value $0.001 per share, which will take effect at 11:59 pm Eastern Time on July 8, 2026. The Company’s common stock will begin trading on a split-adjusted basis on The Nasdaq Capital Market as of the opening of trading on July 9, 2026.

EXHIBIT INDEX

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This report on Form 6-K, including exhibit 99.1 hereto, are hereby incorporated by reference into the Company’s Registration Statements on Form F-3 (Reg. No. 333-288459 and Reg. No. 333-286726).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.