won first place in the Fortune Battle of the Corporate Bands. In 2014, the company was ranked 51st on the 100 Best Companies to Work by Fortune. In 2021, the company achieved Grad "A" MiQ and EO100 Certification for its legacy Haynesville Shale operations. References External links 1989 establishments in Oklahoma American companies established in 1989 Companies based in Oklahoma City Companies formerly listed on the New York Stock Exchange Companies listed on the Nasdaq Companies that filed for Chapter 11 bankruptcy in 2020 Energy companies established in 1989 Natural gas companies of the United States Non-renewable resource companies established in 1989 Oil companies of the United States Petroleum in Oklahoma