Tempus AI is trading 13.19% up at $55.87 after no clear company-specific announcement was identified for August 19, 2026.

  • The latest listed company releases were the August 4 PRISM2 study and July 30 second-quarter results.
  • Major U.S. index futures are higher in a broader firmer pre-market, but the unusually large gain remains insufficiently explained.
  • Earlier weakness included a 4.42% decline on August 18.