A child of JD Rockefeller’s Standard Oil through the merger of Exxon and Mobil in 1999, ExxonMobil’s array of big name personnel has brought it to the fore of its market. Headed up by Rex Tillerson (who rose through the ranks from engineer) last year’s revenue made for interesting reading: a cool $477.35bn. Although the sector took a serious nose dive in recent months, the firm has come out fighting with the expansion of their research and development sections. It has also shown great foresight in committing to executive education, women’s rights at work, and providing information on fuel economics.