Activision did not directly “buy” Blizzard in a simple one-way acquisition. Instead, they merged to form Activision Blizzard, and the key date you’re looking for is:

  • The merger creating Activision Blizzard closed on July 9, 2008.

In practical terms, that’s the moment when Activision and Blizzard (then part of Vivendi Games) became one combined company under the new name Activision Blizzard.

Quick Scoop: Key Dates 🕒

  • Merger announced: 2007 (deal between Activision and Vivendi, Blizzard’s parent).
  • Regulators approve merger (EU): April 2008.
  • Shareholders approve and deal closes:
    • Shareholders agreed to the merger on July 8, 2008.
* The transaction officially **closed on July 9, 2008** , forming Activision Blizzard.

So if someone asks “when did Activision buy Blizzard?” the concise, historically accurate answer is:

It effectively happened in July 2008 , via a merger with Blizzard’s then‑owner Vivendi Games, closing on July 9, 2008.

Why it’s technically a merger, not a simple buyout

Blizzard at that time wasn’t an independent company; it was part of Vivendi Games , itself owned by the French media group Vivendi.

  • Vivendi combined Vivendi Games (including Blizzard Entertainment) with Activision.
  • The result was a new holding company called Activision Blizzard.
  • Vivendi became the largest shareholder , so this wasn’t just Activision writing a check for Blizzard; it was a large-scale media deal designed to pool blockbuster franchises like Call of Duty and World of Warcraft under one roof.

Later twist: Microsoft enters the chat

People sometimes mix up two big deals :

  1. 2008: Activision + Vivendi Games (Blizzard) → Activision Blizzard.
  1. 2023: Microsoft acquires Activision Blizzard , closing on October 13, 2023 , in a deal valued around 68–75 billion USD depending on how you count it.

That second deal is why you still see Activision Blizzard in the news and forums today when folks talk about “the biggest gaming acquisition ever” and what it means for franchises like Call of Duty , Diablo , and Overwatch.

Forum / trending angle

In forum discussions and Reddit threads , you’ll often see people say things like “Blizzard died in 2008 when Activision took over.”

That usually reflects:

  • Frustration with changes in monetization, expansions, or company culture after the 2008 deal.
  • Nostalgia for “pre‑Activision Blizzard” Blizzard, especially among long‑time World of Warcraft and Diablo players.

But from a strictly factual standpoint:

  • The corporate event was a merger completed July 9, 2008.
  • The modern mega‑deal everyone talks about now is Microsoft’s 2023 acquisition of Activision Blizzard.

TL;DR:
Activision and Blizzard came together in the Activision–Vivendi Games merger that formed Activision Blizzard, which closed on July 9, 2008.

Information gathered from public forums or data available on the internet and portrayed here.