Why Is Tempus AI ($TEM) Stock Down -8.99% Today? (Find out why any stock moved today on Tickeron.) Tempus AI shares fell roughly 9% intraday, pulling back to about $76.04 from a prior close of $83.55. The decline largely unwound the prior session's 9% surge driven by an FDA clearance and a bullish analyst call. Insider selling — CEO and founder Eric Lefkofsky has sold more than 1 million shares since mid-September — weighed on sentiment. Bearish options positioning and broad profit-taking in high-momentum AI names added to the pressure. Traders are now watching whether the stock can hold above its recent breakout levels and the timing of the next earnings report. $SDGR $TXG $GEHC $SOPH