I believe they went public on October 22, 1993
Treyarch, the video game development studio, was founded in 1996 but did not go public as an independent entity. Instead, it became a subsidiary of Activision in 2001. As part of Activision, Treyarch operates within the larger publicly traded company, which was listed on the stock market long before Treyarch's acquisition.
Usually
The population of Activision is 4,000.
Activision was created in 1979.
Activision Tennis was created in 1981.
The Activision Decathlon happened in 1983.
Activision Blizzard's population is 2,011.
Activision Blizzard was created in 2008.
Activision Value was created in 2001.
Activision Anthology happened in 2002.
The Activision Decathlon was created on 1983-03-18.
Activision Anthology was created on 2002-11-19.