Rowan Cos. Plc engages in the provision of offshore contract drilling services to the oil and gas industry. It operates through the following segments: Deepwater, Jack-ups, and ARO. The Deepwater segment includes ultra-deepwater drill ships. The Jack-ups segment consists of self-elevating jack-up rigs. The ARO segment owns, manages, and operates offshore drilling units in Saudi Arabia. The company was founded by Charles Rowan and Archibald Rowan in 1923 and is headquartered in Houston, TX.