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

OF THE SECURITIES EXCHANGE ACT OF 1934

DATED: August 27, 2026

Commission File No. 001-33811

NAVIOS MARITIME PARTNERS L.P.

c/o Navios Shipmanagement Inc.

85 Akti Miaouli

Piraeus 18538, 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.

NAVIOS MARITIME PARTNERS L.P.

FORM 6-K

TABLE OF CONTENTS

This report on Form 6-K is hereby incorporated by reference into the Navios Maritime Partners L.P. Registration Statement on Form F-3, File No. 333-296172.

Operating and Financial Review and Prospects

The following is a discussion of the financial condition and results of operations for the three and six month periods ended June 30, 2026 and 2025 of Navios Maritime Partners L.P. (referred to herein as “we”, “us”, “Company” or “Navios Partners”). All of the financial statements have been stated in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”). You should read this section together with the consolidated financial statements and the accompanying notes included in Navios Partners’ 2025 annual report filed on Form 20-F on March 12, 2026 (the “Annual Report”) with the U.S. Securities and Exchange Commission (the “SEC”).

This report contains and will contain forward-looking statements (as defined in Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended) concerning future events, TCE rates (as defined herein), and Navios Partners’ expected cash flow generation, future contracted revenues, future distributions and its ability to make distributions going forward, opportunities to reinvest cash accretively in a fleet renewal program or otherwise, potential capital gains, its ability to take advantage of dislocation in the market and Navios Partners’ growth strategy and measures to implement such strategy, including expected vessel acquisitions and entering into further time charters and Navios Partners’ ability to refinance its debt on attractive terms, or at all. Words such as “may”, “expects”, “intends”, “plans”, “believes”, “anticipates”, “hopes”, “estimates” and variations of such words and similar expressions are intended to identify forward-looking statements. These forward-looking statements are based on the information available to, and the expectations and assumptions deemed reasonable by Navios Partners at the time these statements were made. Although Navios Partners believes that the expectations reflected in such forward-looking statements are reasonable, no assurance can be given that such expectations will prove to have been correct. These statements involve risks and are based upon a number of assumptions and estimates that are inherently subject to significant uncertainties and contingencies, many of which are beyond the control of Navios Partners. Actual results may differ materially from those expressed or implied by such forward-looking statements. Factors that could cause actual results to differ materially include, but are not limited to, risks relating to: global and regional economic and political conditions including global economic activity, demand for seaborne transportation of the products we ship, the ability and willingness of charterers to fulfill their obligations to us and prevailing charter rates, the economic condition of the markets in which we operate, shipyards performing scrubber installations, construction of newbuilding vessels, drydocking and repairs, changing vessel crews and availability of financing, potential disruption of shipping routes due to accidents, wars, sanctions, diseases, pandemics, political events, piracy or acts by terrorists, uncertainty relating to global trade, including prices of seaborne commodities, continuing issues related to seaborne volume and ton miles and the impact of tariffs, the adequacy of our insurance arrangements and our ability to obtain insurance and required certifications, our continued ability to enter into long-term time charters, our ability to maximize the use of our vessels, expected demand in the dry and liquid cargo shipping sectors in general and the demand for our dry bulk, containerships and tanker vessels in particular, fluctuations in charter rates for dry bulk, containerships and tanker vessels, the aging of our fleet and resultant increases in operations costs, the loss of any customer or charter or vessel, the financial condition of our customers, changes in the availability and costs of funding due to conditions in the bank market, capital markets and other factors, the repayment of debt and servicing of our bonds, fluctuation in interest rates and foreign exchange rates, increases in costs and expenses, including but not limited to: crew, insurance, provisions, port expenses, lube oil, bunkers, repairs, maintenance and general and administrative expenses, the expected cost of, and our ability to comply with, governmental regulations and maritime self-regulatory organization standards, as well as standard regulations imposed by our charterers applicable to our business, general domestic and international political conditions, competitive factors in the market in which Navios Partners operates, risks associated with operations outside the United States, the growing expectations from investors, lenders, charterers, and other market participants regarding our sustainability practices, as well as our capacity to implement sustainability initiatives and achieve our objectives and targets, and other factors listed from time to time in Navios Partners’ filings with the SEC, including its Form 20-F and Form 6-K. Navios Partners expressly disclaims any obligations or undertaking to release publicly any

updates or revisions to any forward-looking statements contained herein to reflect any change in Navios Partners’ expectations with respect thereto or any change in events, conditions or circumstances on which any statement is based. Navios Partners makes no prediction or statement about the performance of its common units.

Recent Developments

The Board of Directors of Navios Partners has authorized a new common unit repurchase program for up to $200.0 million that is expected to become effective in the third quarter of 2026. As of August 20, 2026, Navios Partners had repurchased 1,880,880 common units under its previously authorized $100.0 million common unit repurchase program, for a total cost of approximately $92.6 million. Upon termination of the previously authorized common unit repurchase program in August 2026, the remaining availability was added to the Company’s newly authorized common unit repurchase program, resulting in the aggregate repurchase authorization of up to $207.4 million. Common unit repurchases will be made from time to time for cash in open market transactions at prevailing market prices or in privately negotiated transactions. The timing and amount of repurchases under the program will be determined by Navios Partners’ management based upon market conditions and financial and other considerations, including working capital and planned or anticipated growth opportunities. The program does not require any minimum repurchase or any specific number of common units and may be suspended or reinstated at any time in the Company’s discretion and without notice. The Board of Directors will review the program periodically.

In June and July 2026, Navios Partners agreed to acquire three newbuilding scrubber-fitted VLCC tankers from an unrelated third party for an aggregate purchase price of $361.5 million. The vessels are expected to be delivered into Navios Partners’ fleet during the second half of 2028 and in 2029. The closings of the transactions are subject to completion of customary documentation.

In July 2026, Navios Partners agreed to acquire a Japanese newbuilding scrubber-fitted capesize vessel from an unrelated third party under a ten-year bareboat-in contract. Navios Partners has the option to acquire the vessel starting at the end of year four until the end of the charter period. Assuming the exercise of the option at the end of the ten-year period, the bareboat agreement reflects an implied purchase price of approximately $70.1 million at an implied effective interest rate of about 6.0%. The vessel is expected to be delivered into Navios Partners’ fleet during the second half of 2029. The closing of the transaction is subject to completion of customary documentation.

In August 2026, Navios Partners took delivery of a 2026-built Aframax/LR2 scrubber-fitted tanker vessel of 117,012 dwt.

In August 2026, Navios Partners agreed to sell a 2008-built 4,730 TEU containership and a 2009-built capesize vessel of 180,727 dwt to unrelated third parties for an aggregate gross sale price of $65.3 million. The sale of the containership is expected to be completed during the second half of 2027 and the sale of the capesize vessel is expected to be completed during the second half of 2026.

Overview

We are an international owner and operator of dry cargo and tanker vessels that was formed in August 2007 by Navios Maritime Holdings Inc under the laws of the Republic of the Marshall Islands. We have been a public company since November 2007.

As of August 20, 2026, there were outstanding 28,303,508 common units and 622,296 general partnership units. Angeliki Frangou, our Chief Executive Officer and Chairwoman beneficially owned an approximately 18.2% common interest of the total outstanding common units, consisting of 5,157,677 common units held directly or indirectly through entities affiliated with her. In addition, an entity affiliated with Angeliki Frangou beneficially owned 622,296 general partnership units, representing an approximately 2.2% ownership interest in Navios Partners based on all outstanding common units and general partnership units.

Fleet

As of August 20, 2026, Navios Partners’ fleet consisted of 65 dry bulk vessels, 50 containerships and 60 tanker vessels, including three newbuilding capesize vessels (chartered-in vessels under bareboat contracts) that are expected to be delivered in the second half of 2028 and during 2029, seven newbuilding containerships (three 7,900 TEU containerships and four 8,850 TEU containerships) that are expected to be delivered through the first half of 2028 and 19 newbuilding tanker vessels (seven VLCC tanker vessels, eight aframax/LR2 and four MR2 product tanker chartered-in vessels under

bareboat contracts) that are expected to be delivered through 2029. The fleet excludes a 4,730 TEU containership and a capesize vessel of 180,727 dwt that have been agreed to be sold.

We generate revenues by charging our customers for the use of our vessels to transport their dry cargo commodities, containers, crude oil and/or refined petroleum products. In general, the vessels in our fleet are chartered-out under time charters with duration of up to 12 years at inception. From time to time, we operate vessels in the spot market until the vessels have been chartered out under short-term, medium-term and long-term charters.