The story
The company traced its roots to Arkansas Western Gas Company, which was established in July 1929 as a subsidiary of Southern Union Gas Company of Dallas.
In 1985, the company acquired Mustang Fuel for $200 million in stock.
In 2013, the company acquired assets in the Marcellus Shale from Chesapeake Energy for $93 million.
In December 2014, the company acquired 413,000 net acres in the Upper Devonian, Marcellus and Utica shales in West Virginia and Southwest Pennsylvania from Chesapeake Energy for $5.375 billion.
In December 2018, the company sold its assets in the Fayetteville Shale for net proceeds of $1.65 billion.
In November 2021, the company acquired GEP Haynesville for $1.85 billion.
In October 2024, the company merged into Expand Energy.
From Wikipedia’s article on Southwestern Energy, shared under CC BY-SA 4.0.7