On October 8, Qualcomm fell 3.04% in regular trading, trading at $171.87/share, with turnover of $635 million. The decline came amid renewed legal conflict with Arm Holdings, which weighed on the broader semiconductor sector.

The latest trial between Qualcomm and Arm began on October 5 in Delaware federal court. Qualcomm accused Arm of withholding contractually required chip testing tools and leaking a 2024 termination threat letter, which allegedly harmed negotiations with Meta. Qualcomm is seeking to halt royalty payments for up to five years, a figure potentially worth billions of dollars. Qualcomm also wants Arm to grant access to its V10 instruction set architecture. Arm denied the allegations and argued Qualcomm has failed to prove actual damages.

The dispute has intensified concerns over Arm's future licensing revenue, with sector peers also moving lower: Micron Technology down 4.28%, NVIDIA down 2.29%, Advanced Micro Devices down 3.83%, Intel down 5.56%, and Marvell Technology down 5.86%.

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