First noted by SteamDB creator Pavel Djundik and reported by The Verge, documents from an antitrust suit against Valve show that the company consisted of 336 employees in 2021. That's a fraction of the size of most big game publishers, even as Steam continues to shape PC gaming as a whole.
The documents originate from Wolfire Games' 2021 lawsuit arguing that Steam constitutes an unfair monopoly on PC digital distribution. The documents remain partially redacted, and were likely meant to have all the juicy details fully blacked out—a surprisingly common error in the US legal system that leads to sensitive data being made public.
