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U.S. Chamber of Commerce

U.S. Chamber of Commerce

Business Advocacy Organization

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Stories

US merger notification thresholds rise amid regulatory turbulence

Rule Changes

Lead plaintiff in HSR rule challenge

The United States raised the minimum deal size requiring federal antitrust review to $133.9 million on February 15, 2026—up from $126.4 million the previous year. Companies planning mergers or acquisitions above this threshold must now file premerger notifications with the Federal Trade Commission (FTC) and Department of Justice (DOJ) and wait for government clearance before closing their deals.

Updated Feb 16