Identifying Rockefeller's Company

During the period of Industrial Capitalism in the United States from 1865 to 1898, the nation experienced significant economic transformation. This era was marked by the rise of large corporations and significant advances in technology, which drastically changed the production and distribution of goods. One key figure during this time was John D. Rockefeller, who founded a company that became synonymous with the oil industry. What was the name of his company?