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 May 2026

Commission File Number 001-31236

TSAKOS ENERGY NAVIGATION LIMITED

(Translation of registrant’s name into English)

367 Syngrou Avenue, 175 64 P.

Faliro, Athens, Greece

(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 ☐

INFORMATION CONTAINED IN THIS FORM 6-K REPORT

Attached to this report on Form 6-K as Exhibit 99.1 is a copy of Tsakos Energy Navigation Limited’s press release, dated May 21, 2026, announcing its unaudited results for the three months ended March 31, 2026.

EXHIBIT INDEX


99.1		Tsakos Energy Navigation Limited press release, dated May 21, 2026, announcing unaudited results for the three months ended March 31, 2026

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: May 22, 2026


TSAKOS ENERGY NAVIGATION LIMITED

By:		/s/ George Saroglou
		George Saroglou
		President and Chief Operating Officer

TSAKOS ENERGY NAVIGATION LTD 6-K