Home / insider
Epstein David R
Director
Mr. Epstein has served as the Chairman and Chief Executive Officer of Ottimo Pharma Limited since October 2024. Mr. Epstein also serves as a board member at privately held biotherapeutics companies Valo Health, LLC, and Agomab Therapeutics NV. He is a Director at the non-profit Three Opinions Foundation Inc and at South Florida’s Pelican Harbor Seabird Station. Mr. Epstein previously served as the Chief Executive Officer and a member of the board of directors of Seagen Inc. from November 2022 until Seagen’s acquisition by Pfizer Inc. in December 2023. From October 2021 to December 2023, Mr. Epstein served on the board of directors of OPY Acquisition Corp. I. From June 2022 to June 2023, Mr. Epstein served…
Biography from the company’s latest DEF 14A proxy statement
Tempus AI, Inc. 15 open-market prints by this insider, 12/11/2024 – 9/1/2026. Triangles mark only their Form 4 purchases and sales. Full TEM chart
TEM trades
| Date | Form 4 | Ticker | Side | Shares | Value | 90d | 180d |
|---|---|---|---|---|---|---|---|
| 9/1/2026 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 250 | $16.4K | −7.75%hist | −14.5%hist |
| 8/3/2026 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 370 | $16.1K | −7.75%hist | −14.5%hist |
| 6/1/2026 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 250 | $12.3K | −19.4% | −14.5%hist |
| 3/2/2026 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 250 | $12.7K | +0.96% | −18.3% |
| 2/2/2026 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 370 | $22.0K | +4.68% | +21.3% |
| 12/1/2025 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 250 | $18.9K | +28.0% | +28.7% |
| 11/3/2025 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 370 | $33.3K | +34.0% | +37.1% |
| 9/2/2025 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 250 | $18.4K | +5.45% | +32.0% |
| 8/1/2025 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 370 | $20.4K | −57.2% | −17.6% |
| 6/2/2025 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 250 | $13.8K | −23.4% | −16.7% |
| 5/1/2025 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 370 | $19.8K | −11.5% | −67.0% |
| 3/17/2025 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 990 | $46.4K | −44.4% | −70.7% |
| 3/3/2025 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 250 | $14.4K | −24.6% | −53.8% |
| 2/3/2025 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 370 | $19.7K | +12.1% | +6.53% |
| 12/11/2024 | Form 410b5-1 | Tempus AI, Inc · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$98.44BPrice$77.8452w high$103.2552w low$41.55 | SELL | 620 | $25.9K | −5.53% | −55.0% |
Chart uses split-adjusted closes from the first print through the latest available bar. Returns use the last close on or before the trade date and the first close on or after 90 and 180 calendar days. Sales are signed so a declining price is a positive result for the seller. Not investment advice.