Rowan Companies is an offshore drilling contractor based in the United States. Founded in 1923, the company specializes in providing drilling services for oil and gas exploration. It operates a fleet of mobile offshore drilling units, including jack-up rigs and deepwater drillships, primarily in the Gulf of Mexico and international markets. In 2017, Rowan Companies merged with Ensco, forming a larger entity known as Valaris. This merger aimed to enhance operational efficiency and expand their market presence. Rowan's commitment to safety and innovation has made it a significant player in the offshore drilling industry.