How it started
History
Anadarko was formed in 1959 as a subsidiary of Panhandle Eastern Corporation Pipe Line Company after the discovery of large amounts of natural gas in the Anadarko Basin, which underlies the western part of the state of Oklahoma and the Texas Panhandle, and extending into southwestern Kansas and southeastern Colorado.
In 1986, Panhandle Eastern Corporation distributed its interests in Anadarko to its shareholders via a corporate spin-off, and Anadarko became a public company.
In 1999, the company purchased a 7.5-acre (30,000 m2) tract in The Woodlands, Texas from the Woodlands Land Company to build an 800,000-square-foot (74,000 m2), 32-story headquarters building, on the site. In 2012, the company began construction of another office tower adjacent to its headquarters. The company named its two office towers after former CEOs. The buildings were completed in 2014.
In April 2000, the company acquired Union Pacific Resources in a $4.4 billion transaction.
In June 2001, the company acquired Berkeley Petroleum Corporation for C$1.2 billion plus the assumption of C$400 million in debt.
From Wikipedia’s article on Anadarko Petroleum, shared under CC BY-SA 4.0.3