UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 or ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-31465 NATURAL RESOURCE PARTNERS L.P. (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or orga ...

Natural Resource Partners LP (NYSE:NRP) Q4 2018 Earnings Conference Call March 7, 2019 10:00 AM ET Company Participants Tiffany Sammis ??? Manager of Investor Relations Craig Nunez ??? President and Chief Operating Officer Chris Zolas ??? Chief Financial Officer Kevin Craig ??? Executive Vice President-Coal Conference Call Participants Nick Jarmoszuk ??? Stifel Operator Good morning, ladies and gentlemen, and welcome to the Natural Resource Partners LP Fourth Quarter and Full Year 2018 Earnings Conference C ...