SIG Sauer GmbH is the subsidiary of manufacturing firm L&O Holding, which also owns Swiss Arms AG. Initially SIG Sauer Inc was established in 1985 with the name Sigarms (until October 2007) to import and distribute SIG firearms into the United States. Since 2000 SIG Sauer Inc is organizationally separate from manufacturer SIG Sauer GmbH.
Today, SIG Sauer is the largest of the five companies and one of the largest firearms manufacturing entities in the world. It is also the fastest growing firearms maker in the United States, expanding its operations and increasing sales nearly 50% since 2005. SIG Sauer has recently tripled its work force and invested eighteen million dollars into state-of-the-art manufacturing facilities and equipment.
According to SIG Sauer, one-third of US police use SIG firearms.
SIG Sauer operates a firearms training school in the U.S. led by German specialists, the SIG Sauer Academy, in Epping, New Hampshire.