10 Biggest Oil Companies in the World

No. 7: Royal Dutch Shell plc (ADR) (NYSE:RDS.A)

Royal Dutch Shell plc (ADR) (NYSE:RDS-A)

Production: 3.9 million barrels a day

Although already a giant in the oil industry, Royal Dutch Shell is preparing to expand its influence with new drilling sites across the world. If successful, it is safe to assume that the company will increase its already massive oil and natural gas production even more.