SBLK: 6-K company filing

6-K 1 form6-k.htm REPORT OF FOREIGN PRIVATE ISSUER UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2026 Commission File Number: 001-33869 STAR BULK CARRIERS CORP. (Translation of registrant’s name into English) Star Bulk Carriers Corp. c/o Star Bulk Management Inc. 40 Agiou Konstantinou Street, 15124 Maroussi, Athens, Greece (Address of principal executive offices) Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F. Form 20-F ☒ Form 40-F ☐ INFORMATION CONTAINED IN THIS FORM 6-K REPORT Arrow Research Limited, an independent appraisal firm engaged by Star Bulk Carriers Corp. (the “Company”), prepared valuation reports, dated July 31, 2026 and August 21, 2026, covering (i) the Company’s 133 owned vessels and (ii) the Company’s five newbuilding vessels, respectively (the “Valuation Reports”). Copies of the Valuation Reports are attached to this Form 6-K as Exhibit 99.1. SIGNATURE 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. Dated: September 4, 2026 STAR BULK CARRIERS CORP. By: /s/ Simos Spyrou Name: Simos Spyrou Title: Co-Chief Financial Officer Exhibit Number Description 99.1 Valuation Reports