Personalis-Tempus AI deal clears US antitrust waiting period under HSR Act
PSNL•The antitrust waiting period for Tempus AI’s planned acquisition of Personalis expired at 11:59 p.m. ET on Oct. 2, 2026. Closing still requires Personalis shareholder approval at a virtual meeting, whose date has not been set.
1. Waiting period expires
The antitrust waiting period for Tempus AI’s planned acquisition of Personalis expired at 11:59 p.m. ET on Oct. 2, 2026. Tempus withdrew its initial filing on Aug. 31 and refiled on Sept. 2, restarting the 30-day waiting period. Closing still hinges on Personalis shareholder approval at a virtual meeting, with the date yet to be set.
