Wikipedia
Sonat
Sonat, Inc., headquartered in Birmingham, Alabama, was a large Fortune 500 American energy holding company. The company was founded in 1928 and was listed on the New York Stock Exchange under the ticker symbol "SNT". Sonat was primarily involved in transmission and marketing natural gas and oil and gas exploration and production. The company was also involved in contract offshore drilling until 1995 when the offshore business became Transocean. In 1999 Sonat merged with El Paso Corporation. The company was headquartered in the AmSouth-Sonat Tower in downtown Birmingham.