Microsoft has changed its legal representation in a shareholder lawsuit related to its $69 billion acquisition of Activision Blizzard. The company has hired Jenner & Block to replace Simpson Thacher in the Delaware Chancery Court case. Court documents did not specify the reason for the change.
Microsoft stated that Simpson Thacher continues to represent it on other matters. The switch occurred in a lawsuit claiming Activision improperly approved a draft merger agreement rather than the final version. Microsoft is seeking to validate the acquisition and deny a $15 million fee request from lawyers representing an Activision shareholder.
Background on Law Firms Involved
Jenner & Block has previously worked for Microsoft and is currently suing the Trump administration over executive orders affecting their security clearances and access to government buildings. The firm called the executive order an “unconstitutional abuse of power.”
In contrast, Simpson Thacher represented Microsoft in the Activision Blizzard acquisition and has pledged nearly $1 billion in free legal services to the Trump administration. The change in legal representation comes as companies navigate complex relationships with the White House and potential conflicts of interest.

The image shows a Microsoft stand at the Mobile World Congress trade show, highlighting the company’s presence in major tech events.
Implications of the Law Firm Change
- Companies can switch legal teams for various reasons, including cost savings or avoiding conflicts.
- The change highlights the complex nature of corporate legal representation and potential conflicts with government administrations.
- Microsoft’s acquisition of Activision Blizzard remains under legal scrutiny, with the company seeking to validate the deal.
The situation demonstrates the intricate relationships between major corporations, law firms, and government administrations, particularly during significant business transactions like Microsoft’s acquisition of Activision Blizzard.