This was a unique case in which Arm sued one of its best customers. The falling-out between the partners arose in 2022 when Arm claimed that Qualcomm violated the terms of a licensing agreement it had with Nuvia, a company that Qualcomm bought in 2021 for $1.4 billion. Qualcomm countered that the technology that was transferred from Nuvia was covered under its own license agreement with Arm.