Marathon Oil in North America, including $600 million in the Eagle Ford and $200 million in the Bakken formation. The company owns 277,000 net acres in the Bakken formation. Marathon began as The Ohio Oil Company in 1887. In 1889, it was purchased by John D. Rockefeller's Standard Oil. It remained a part of Standard Oil until Standard Oil was broken in 1911. In 1930, The Ohio Oil Company bought the Transcontinental Oil Company and established the "Marathon" brand name. In 1962, the company changed its name to "Marathon Oil Company". In 1982, Mobil made a hostile offer to buy the company;
Standard Oil Standard company only from 1908 until 1911. One of the original "Muckrakers" was Ida M. Tarbell, an American author and journalist. Her father was an oil producer whose business had failed due to Rockefeller's business dealings. After extensive interviews with a sympathetic senior executive of Standard Oil, Henry H. Rogers, Tarbell's investigations of Standard Oil fueled growing public attacks on Standard Oil and on monopolies in general. Her work was published in 19 parts in "McClure's" magazine from November 1902 to October 1904, then in 1904 as the book "The History of the Standard Oil Co". The Standard Oil Trust