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 22, 2023 COMMISSION FILE NUMBER: 001-33373 CAPITAL PRODUCT PARTNERS L.P. (Translation of registrant’s name into English) 3 Iassonos Street Piraeus, 18537 Greece (Address of principal executive offices) Indicate by check mark whether the Registrant files or will file annual reports under cover o ...