Arm's licensing practices face antitrust probes in US and South Korea. South Korea's KFTC raided Arm's Seoul office after Qualcomm's complaint. Qualcomm also filed with EU.
KFTC investigates if Arm's licensing constitutes illegal monopoly, refusal to license, or tougher terms. Arm's revenue depends on licensing fees from Nvidia and Apple.
US FTC launched its own investigation into Arm's global licensing model. If FTC finds abuse, it could lead to fines, licensing model changes, open standards, or royalty restructuring, affecting chip design costs and partnerships.
Arm declined to comment on the US probe but stated: "Qualcomm's accusation is a desperate and devious attempt to gain leverage in a commercial dispute."

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