On May 25, 2026, Bloomberg News reported that Arm Holdings plc (ARM) is set to face a US antitrust probe over its chip...

On May 25, 2026, Bloomberg News reported that Arm Holdings plc (ARM) is set to face a US antitrust probe over its chip technology licensing practices (source). The investigation, likely led by the Federal Trade Commission or Department of Justice, will examine whether ARM's licensing terms unfairly restrict competition in the semiconductor industry. This follows ongoing scrutiny of ARM's business model after its IPO and its critical role as a CPU architecture licensor for nearly all smartphones and an increasing share of datacenter chips. An adverse outcome could force changes to ARM's licensing structure, potentially reducing royalty revenue or opening up its instruction set to more competitors. The probe may also create uncertainty for ARM's customers, including Qualcomm (QCOM), Apple (AAPL), Nvidia (NVDA), Alphabet (GOOGL), and Microsoft (MSFT), who rely on ARM architecture. Given the regulatory headwind, ARM's stock may face pressure in the near term. The probe's official announcement is expected within weeks, with a preliminary investigation phase likely lasting 30-60 days.