The disclosure was made two days after China launched an antitrust investigation into Qualcomm, examining whether the US firm violated China’s antitrust law by not declaring some details of its acquisition of the Israeli chip designer.

Qualcomm did not immediately respond to Reuters’ request for comment.

China’s State Administration for Market Regulation (SAMR) said it informed Qualcomm in March 2024 that the deal requires approval by the regulator, and the US firm in the same month notified SAMR it wouldn’t pursue further.

However, Qualcomm in June this year completed the deal without informing the authority, the regulator said, adding Qualcomm “acknowledged the above facts”, based on which Beijing launched the antitrust probe.

Qualcomm’s shares fell more than 5% on Friday after US President Donald Trump threatened to hike tariffs against China and cancel a planned meeting with President Xi Jinping.