Bradley A. Keywell Amends Tempus AI Stake Below 5% Threshold

Ownership Summary

Bradley A. Keywell and affiliated entities (BK TL21 LLC, The Keywell Foundation Inc, and Churchill Investments 21 LLC) filed Amendment No. 2 to Schedule 13G regarding their holdings in Tempus AI, Inc. ($TEM).

• Aggregate Beneficial Ownership: 6,071,744 shares of Class A Common Stock
• Ownership Percentage: 3.46% (based on 175,390,967 shares outstanding as of July 24, 2026)
• Threshold Status: Item 5 indicates that the reporting group has ceased to be the beneficial owner of more than five percent of the class of securities.

Breakdown by Entity

1. Bradley A. Keywell (Aggregate Indirect): 6,071,744 shares (3.46%)
   • Grantor retained annuity trust: 195,160 shares
   • The Keywell Foundation, Inc.: 357,900 shares
   • BK TL21 LLC: 2,213,198 shares
   • Churchill Investments 21 LLC: 3,305,486 shares
2. Churchill Investments 21 LLC: 3,305,486 shares (1.88%)
3. BK TL21 LLC: 2,213,198 shares (1.26%)
4. The Keywell Foundation Inc: 357,900 shares (0.02%)

Market Significance

The filing formalizes that Bradley A. Keywell's beneficial stake has decreased below the 5% active tracking threshold under Section 13(d)/13(g). Unless ownership moves back above 5%, further routine ownership changes will no longer require Schedule 13G updates.