John A. Scarlett
Chairman, President and CEO at Geron Corporation
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: Geron Corporation, 3 years.
Geron Corporation
Director · Chairman, President and CEO
Chief executive roles
Geron Corporation
· Chairman, President and CEO
Until August 2025
· Former
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Feb 27, 2025 | Geron Corporation | Open-market purchase | +12,500 | $1.77 | $22,125 |
| Jun 4, 2024 | Geron Corporation | Option exercise | +600,000 | $2.54 | $1,524,000 |
| Jun 4, 2024 | Geron Corporation | Open-market sale | −600,000 | $4.00 | $2,400,000 |
| Feb 10, 2023 | Geron Corporation | Option exercise | +446,668 | $1.50 | $670,002 |
| Feb 10, 2023 | Geron Corporation | Open-market sale | −446,668 | $3.00 | $1,340,004 |
| Feb 9, 2023 | Geron Corporation | Option exercise | +446,666 | $1.50 | $669,999 |
| Feb 9, 2023 | Geron Corporation | Open-market sale | −446,666 | $3.03 | $1,353,398 |
| Feb 8, 2023 | Geron Corporation | Option exercise | +446,666 | $1.50 | $669,999 |
| Feb 8, 2023 | Geron Corporation | Open-market sale | −446,666 | $3.08 | $1,375,731 |
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