MrFunSocks
Banned
Valve is a private company, we don't know how much they're worth.Valve - 10 billion (2019)
Epic - 15 billion
Activision -50 billion
Tencent - over 500 billion
Microsoft - 1.62 trillion
Sony - 90 billion
Just a few. Valve isn't worth that much when compared to the big boys. I agree though, most likely not for sale. The numbers can be verified easily on Google.
Valves not for sale though, and if they were it's not at a price that Nintendo or Sony could afford. Microsoft could, but it would cost them likely double or triple what Zenimax just did, so not a chance in hell they would do it.