UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C.

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 April 2021

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 of Form 20-F or Form 40-F.

Form 20-F ☑                            Form 40-F ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ☐

Attached as Exhibit I hereto is a copy of the press release of Capital Product Partners L.P. announcing the sale of two 9,288 TEU container vessels.

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.

Exhibit I

CAPITAL PRODUCT PARTNERS L.P. ANNOUNCES THE SALE OF TWO 9,288 TEU CONTAINER VESSELS

ATHENS, Greece, April 20, 2021 (GLOBE NEWSWIRE) — Capital Product Partners L.P. (the “Partnership”, “CPLP” or “we” / “us”) (NASDAQ: CPLP), an international owner of ocean-going vessels, today announced the sale of two 9,288 TEU container vessels.

The Partnership has entered into a memorandum of agreement for the sale of the M/V ‘CMA CGM Magdalena’ (115,639 dwt / 9,288 TEU, Eco-Flex, Wide Beam Containership built 2016, Daewoo-Mangalia Heavy Industries S.A.) and the M/V ‘Adonis’ (115,145 dwt / 9,288 TEU, Eco-Flex, Wide Beam Containership built 2015, Daewoo-Mangalia Heavy Industries S.A.) to an unaffiliated third party for a total consideration of $195.0 million. Delivery of the M/V ‘CMA CGM Magdalena’ and the M/V ‘Adonis’ to their buyer is expected in May and July/August 2021, respectively. The carrying value of M/V ‘Adonis’ and the M/V ‘CMA CGM Magdalena’ at the end of the first quarter of 2021 was $72.7 million and $71.7 million, respectively. The Partnership expects gross cash proceeds from the sale after repaying outstanding debt of approximately $97.6 million.

About Capital Product Partners L.P.

Capital Product Partners L.P. (NASDAQ: CPLP), a Marshall Islands master limited partnership, is an international owner of ocean-going vessels. CPLP currently owns 17 vessels, including thirteen Neo-Panamax container vessels, three Panamax container vessels and one Capesize bulk carrier.

For more information about the Partnership, please visit: www.capitalpplp.com.

CPLP-F

Contact Details:

Capital GP L.L.C.

Jerry Kalogiratos

CEO

Tel. +30 (210) 4584 950

E-mail: j.kalogiratos@capitalpplp.com

Capital GP L.L.C.

Nikos Kalapotharakos

CFO

Tel. +30 (210) 4584 950

E-mail: n.kalapotharakos@capitalmaritime.com

Investor Relations / Media

Nicolas Bornozis

Capital Link, Inc. (New York)

Tel. +1-212-661-7566

E-mail: cplp@capitallink.com

Source: Capital Product Partners L.P.

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