Microsoft's acquisition of Activision Blizzard

The deal in one paragraph

On January 18, 2022, Microsoft announced it would acquire Activision Blizzard, the publisher behind Call of Duty, World of Warcraft, Overwatch, and Candy Crush, for $95.00 per share in an all cash deal valued at $68.7bn, roughly a 45% premium over Activision's last closing price before the announcement.

It was the largest acquisition in Microsoft's history and, at signing, the largest ever announced in the video game industry.

What makes this deal a genuine case study is not the price or the target, it is the regulatory fight that followed: the US Federal Trade Commission sued to block it, the UK's Competition and Markets Authority provisionally blocked it outright, and the European Commission cleared it only after Microsoft agreed to binding conditions.

Microsoft won on every front, closing the deal on October 13, 2023, about 21 months after announcement, but only after restructuring part of the transaction to satisfy the UK regulator. Three regulators, three different rulings, one closed deal.

Why Microsoft wanted Activision Blizzard

Microsoft's case rested on three pillars. First, content for Xbox Game Pass, the subscription service it had been building since 2017, which needed a deep, constantly refreshed library, and Activision Blizzard owned some of the most durable franchises in gaming.

Second, mobile: Microsoft's console and PC business had almost no presence in mobile, the largest segment of the global games market by revenue, and Activision's King division, maker of Candy Crush, gave Microsoft a mobile audience overnight. Third, positioning gaming as a platform business, with games streamed across phones, tablets, and browsers rather than tied to a single console.

The deal also followed a pattern Microsoft had already run: in 2021 it closed its purchase of ZeniMax Media, parent of Bethesda, for $7.5bn. Activision Blizzard was the same playbook at roughly nine times the size.

Structure and terms

The transaction itself was structurally simple even though the regulatory path was not. Microsoft agreed to pay cash, not stock, removing exchange-ratio risk for Activision shareholders.

Nothing about the payment mechanics changed between announcement and close. What changed, and what took 21 months, was the shape of what Microsoft was actually allowed to buy in one major market.

The antitrust gauntlet: FTC, CMA, and the EU

Three regulators reviewed the same transaction and reached three different conclusions, on different timelines, using different legal frameworks. That divergence is the core of why this deal is worth knowing well.

The FTC's theory was vertical foreclosure: once Microsoft owned Call of Duty, it argued, Microsoft would have the incentive to withhold or degrade the game on rival platforms, particularly PlayStation, to push players toward Xbox and Game Pass.

Microsoft's counter, backed by a ten year licensing commitment to keep Call of Duty on PlayStation, was persuasive enough that Judge Jacqueline Scott Corley in the Northern District of California ruled the FTC had not shown a likelihood of success on the merits.

The FTC's underlying administrative complaint, a separate in-house proceeding, stayed technically open for almost two more years, not resolved until the Ninth Circuit rejected the FTC's appeal in May 2025 and the Commission dismissed the case shortly after.

The CMA took the hardest line of the three. Its concern was narrower and more forward looking: cloud gaming, the market for streaming games rather than downloading them, where the CMA estimated Microsoft already controlled 60 to 70% of global capacity through Azure and Xbox Cloud Gaming.

It worried that folding Activision's catalog into that position would let Microsoft dominate a market still being defined, and in April 2023 it blocked the deal outright rather than accept behavioral promises.

Microsoft's fix was structural, not promissory: it carved Activision's cloud streaming rights out of the deal entirely and sold them to Ubisoft, for existing titles and anything Activision releases over the next 15 years, covering the world outside the European Economic Area (inside the EEA, Ubisoft received a non-exclusive license instead, to align with the EU's own remedy).

That gave the CMA an independent, non-Microsoft owner of the exact asset it was worried about, and it cleared the revised deal on October 13, 2023, the same day the transaction closed.

The European Commission took a third path, conditional approval through behavioral commitments rather than a divestiture. Microsoft agreed to offer a free, 10 year license to any interested cloud gaming service, and to consumers directly, covering current and future Activision Blizzard PC and console titles, including Call of Duty, playable through any cloud provider a customer chooses.

The Commission judged that this preserved competitive access without forcing Microsoft to give up ownership of anything, and cleared the deal in May 2023, five months before the UK came around.

How it played out

The UK block in April 2023 was the real crisis point, coming after the EU had already cleared the deal, leaving the UK as the lone holdout. Microsoft appealed the CMA's decision to the UK's Competition Appeal Tribunal while, in parallel, negotiating the Ubisoft carve out as an alternative path.

That two track approach worked: the CMA cleared the restructured proposal in October, and Microsoft closed the deal that same day. The FTC's parallel in-house case never had the power to unwind a deal that had already closed, and was formally dismissed in May 2025 once the Ninth Circuit had exhausted the FTC's appeal options.

If it comes up in your interview

Here is a clean way to walk through it out loud: "Microsoft agreed to buy Activision Blizzard in January 2022 for $95 a share, all cash, valuing the deal at $68.7 billion. Strategically, Microsoft wanted Activision's content for Xbox Game Pass, its mobile audience through King and Candy Crush, and a stronger position in cloud gaming. The deal ran into antitrust resistance in three places at once.

The US FTC sued to block it, arguing Microsoft would withhold Call of Duty from competitors, but lost its request for an injunction in mid-2023. The EU cleared the deal that May on the condition Microsoft offer a free ten year license of Activision's games to rival cloud services.

The UK's CMA blocked the deal outright in April 2023 over cloud gaming market power, and Microsoft only got it cleared by selling Activision's cloud streaming rights outside Europe to Ubisoft for fifteen years. Once the UK signed off in October 2023, the deal closed the same day, about 21 months after it was announced."

Likely follow-ups:

Why did the UK block the deal when the EU approved it around the same time? The two regulators applied different theories of harm. The EU accepted a behavioral licensing commitment as sufficient protection. The CMA distrusted behavioral remedies in an immature market like cloud gaming, arguing that ongoing compliance is harder to monitor than a clean structural fix, so it held out for Microsoft to actually give up the disputed asset.

What is the difference between a structural remedy and a behavioral remedy? A structural remedy removes the source of the concern permanently, typically through a divestiture, like Microsoft selling Activision's cloud streaming rights to Ubisoft. A behavioral remedy leaves the asset with the acquirer but imposes an ongoing obligation, like Microsoft's licensing commitment to the EU.

Regulators generally view structural remedies as more reliable because they do not require continuous monitoring.

Why did the FTC's case stay open until 2025 even though the deal closed in 2023? The FTC ran two tracks. It asked a federal court for a preliminary injunction to pause the deal, and lost that request in July 2023, which let the deal close. Its administrative complaint was a separate proceeding that stayed open until the FTC exhausted its Ninth Circuit appeal and formally dismissed the case in May 2025.

What this deal teaches

The core lesson is that antitrust review for a large, global transaction is not one process, it is several parallel processes with different legal standards, different market definitions, and different remedies on the table, and they do not have to agree with each other.

A deal can be conditionally approved in one region, blocked in another, and litigated in a third, all at once, and the acquirer has to satisfy each one on its own terms rather than winning a single global argument.

The second lesson is the practical difference between structural and behavioral remedies, giving something up permanently versus promising to behave, and why regulators reach for one over the other depending on how confident they are that a commitment can be enforced.

The third is timeline: a deal that looks straightforward on paper, one buyer, one seller, an all cash offer with no competing bidder, can still take nearly two years to close if even one major regulator says no, because a strategic acquirer with committed financing generally chooses to fight and restructure rather than walk away.

All three ideas show up constantly in interviews, whether the question is about a specific deal or a hypothetical about what a regulator might require to approve a deal you are pitching.