Marine Petroleum Trust, in conjunction with its subsidiary Marine Petroleum Corporation, operates as a royalty trust within the United States. As of June 30, 2021, its portfolio encompassed an overriding royalty interest in 55 distinct oil and natural gas leases. These leases collectively spanned an estimated 199,868 gross acres, situated across the Central and Western regions of the Gulf of Mexico, offshore both Louisiana and Texas. The Trust, which was originally established in 1956, maintains its corporate headquarters in Dallas, Texas.