It is notable for the Harken Energy scandal, which involved allegations of insider trading by George W. Bush in 1990.

In 1973, the company was founded as an unprofitable collection of Texas oil wells for investors seeking tax write-offs.

[7] In 2007, the company changed its name to HKN, Inc.[8] Harken attracted attention because of the role played in its affairs during the 1980s by George W. Bush, later the President of the United States.

After pressure from indigenous tribes and environmentalists, operating as Acción de Lucha Anti-Petrola, the government instituted a moratorium on exploration.

In September 2003, the company filed a dispute seeking $57 billion from the government of Costa Rica for lost earnings.