With more than one million customers, Airgas sells the following: The company has 18,000 employees in the following industries: Its integrated network of about 1,400 locations includes branches, cylinder fill plants, production facilities, specialty gas laboratories, and regional distribution centers.

Through more than 500 acquisitions and internal growth, Airgas built the largest national distribution network in the packaged gas industry.

In October 2009, John McGlade, the president and chief executive officer of Air Products, a competing concern, privately asked McCausland whether he'd be interested in merging the two companies.

[6][7][8] Air Products abandoned the effort on February 15, 2011,[9][10] after a decision by the Delaware Chancery Court that upheld Airgas's extensive use of a "poison pill" defense.

[13] In 2019, Airgas signed a definitive agreement to acquire TA Corporate Holdings, Inc. (“Tech Air”), a large independent distributor of industrial gases and welding supplies serving various geographies in the United States.