FTC Opens Antitrust Probe into Arm

The U.S. Federal Trade Commission has opened a formal antitrust investigation into Arm Holdings, probing whether the British chip designer has restricted or downgraded licensing of its CPU blueprints as it moves into making its own processors.

Bloomberg reported the FTC notified Arm earlier this year and has asked the company to preserve relevant documents as part of the inquiry, a step regulators use to secure evidence while they evaluate possible enforcement action.

The investigation comes as Arm has publicly signaled a bigger role in designing and selling its own chips for data centers and artificial intelligence workloads, a shift from its long-standing licensing-only business. Company announcements and recent reporting show Arm has moved to develop CPU products aimed at AI servers.

The probe appears linked to commercial disputes with major licensees, most notably Qualcomm, which has fought in U.S. courts over whether designs tied to Nuvia — a startup Qualcomm bought — were covered by existing Arm licenses. That litigation produced rulings and appeals that have kept Arm's licensing model in the headlines.

Regulatory attention to Arm is not limited to the United States. South Korea’s competition authority carried out an inspection related to licensing complaints late last year after a complaint filed by Qualcomm and others, underscoring the global nature of the scrutiny.

Arm’s business model has long been to license instruction-set architectures and core designs to chipmakers rather than to manufacture silicon itself, a strategy that helped the company become dominant across smartphones and other devices. That model is the center of the current debate because changes to licensing terms could affect many downstream chip customers.

Industry lawyers and antitrust experts say investigations like the FTC’s typically begin with document preservation and interviews, then can expand into subpoenas, negotiated settlements, or formal complaints if regulators find evidence of illegal exclusion or preferential dealing. Those proceedings can take months or years.

For Arm, the inquiry raises reputational and commercial risks at a sensitive time. The company has been pitching its own CPU designs to cloud and AI customers and saying the move could materially increase revenue as data-center demand grows. Any enforcement action could slow that strategy or force licensing changes.

Arm has denied wrongdoing in public comments during its dispute with Qualcomm and framed some clashes as commercial rather than regulatory problems, but the FTC’s interest elevates the matter to a legal-political level that few private disputes reach. Reuters and Bloomberg reporting so far cites unnamed people familiar with the matter.

For licensees such as Qualcomm, Nvidia and others, the stakes are straightforward: access to Arm’s instruction-set architecture and the terms of that access determine who can design competitive chips and at what cost. Changes that narrow or downgrade licenses could force some partners to seek alternative architectures or to litigate for clarity.

Market participants say the probe could ripple through supply chains that already face pressures from higher interest rates, geopolitical tensions and an AI-driven surge in data-center spending. Any regulatory restrictions on Arm’s behavior would be scrutinized by customers and competitors alike.

At this early stage the FTC has signalled an investigation but has not filed an enforcement action, and Arm has not been accused formally of violating U.S. antitrust law. Regulators commonly open wide-ranging fact-finding inquiries before deciding whether to escalate. For now, companies that work with Arm and investors will be watching for further filings, court documents or public statements that clarify the scope of the probe.