Marine Petroleum Trust, together with its subsidiary, Marine Petroleum Corporation, operates as a royalty trust in the United States. As of June 30, 2021, the company had an overriding royalty interest in 55 oil and natural gas leases covering approximately 199,868 gross acres located in the Central and Western areas of the Gulf of Mexico off the coasts of Louisiana and Texas. Marine Petroleum Trust was incorporated in 1956 and is based in Dallas, Texas.