The company was established in 1911, being later acquired by the Standard Oil of New York, which operated it as a wholly-owned subsidiary until its demise in 1959.

In 1999, Mobil merged with Exxon to form ExxonMobil, one of the largest oil companies in the world.

The acquisition proved to be one of the most important mergers that brought the majors in to develop the Corsican and Beaumont area into one of the largest refineries in the world.

red Pegasus logo, as well as the Mobil name for its products (Mobilgas, Mobiloil, etc.).

In 1924, Magnolia Petroleum launched Beaumont's first radio station, KFDM ("Kall For Dependable Magnolene"), which would be leased to the Sabine Broadcasting Company in 1932 and sold to the Beaumont Broadcasting Corporation in 1937.