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

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

15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of August 2025

Commission File Number: 001-34934

COSTAMARE INC. (Translation of registrant’s name into English)

7 rue du Gabian, MC 98000 Monaco (~~Translation~~Address of ~~registrant’s~~principal ~~name~~executive ~~into English~~office)

7 rue du Gabian, MC 98000 Monaco

(Address of principal executive office)

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 ☐

INCORPORATION BY REFERENCE

Exhibit 99.1 to this Report on Form 6-K shall be incorporated by reference into our registration statements on Form F-3, as filed with the U.S. Securities and Exchange Commission on July 6, 2016 (File No. 333-212415) and March 29, 2024 (File No. 333-278366) to the extent not superseded by information subsequently filed or furnished (to the extent we expressly state that we incorporate such furnished information by reference) by us under the Securities Act of 1933 or the Securities Exchange Act of 1934, in each case as amended.

EXHIBIT INDEX

99.1	~~Proxy~~Unaudited ~~Statement~~interim condensed consolidated financial statements of Costamare Inc. for the six-month period ended June 30, 2025, ~~Annual~~and ~~Meeting~~the ofaccompanying ~~Stockholders~~notes.
99.2	Proxy for the 2025 Annual Meeting of Stockholders
101.INS	Inline XBRL Instance Document
99.3	2024 Annual Report
101.SCH	Inline XBRL Taxonomy Extension Schema
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

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.

Date: August 821, 2025

	COSTAMARE INC.

	By:	/s/ Gregory G. Zikos
	Name:	Gregory G. Zikos
	Title:	Chief Financial Officer

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