Time on boards
- Boards served
- 2
- Current seats
- 2
- Board service
- 3 years
- Director since
- 2024
3 years of board service in total across 2 boards, counting each seat separately. Longest: Alumis Inc., 2 years.
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
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Alumis Inc. June 30, 202698.0%
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 |
|---|---|---|---|---|---|
| Aug 10, 2026 | Latigo Biotherapeutics Inc. | Derivative conversion | +3,117,664 | — | — |
| Aug 10, 2026 | Latigo Biotherapeutics Inc. | Derivative conversion | +445,320 | — | — |
| Aug 10, 2026 | Latigo Biotherapeutics Inc. | Derivative conversion | +1,125,823 | — | — |
| Aug 10, 2026 | Latigo Biotherapeutics Inc. | Derivative conversion | +742,201 | — | — |
| Aug 10, 2026 | Latigo Biotherapeutics Inc. | Open-market purchase | +140,000 | $18.00 | $2,520,000 |
| Aug 10, 2026 | Latigo Biotherapeutics Inc. | Derivative conversion | +195,776 | — | — |
| Aug 10, 2026 | Latigo Biotherapeutics Inc. | Derivative conversion | +3,117,664 | — | — |
| Aug 10, 2026 | Latigo Biotherapeutics Inc. | Derivative conversion | +296,880 | — | — |
| Apr 1, 2026 | Alumis Inc. | Other | −1,176,470 | — | — |
| Apr 1, 2026 | Alumis Inc. | Other | +1,123,337 | — | — |
| Apr 1, 2026 | Alumis Inc. | Other | −1,123,337 | — | — |
| Apr 1, 2026 | Alumis Inc. | Other | +680,486 | — | — |
| Jan 8, 2026 | Alumis Inc. | Open-market purchase | +117,647 | $17.00 | $1,999,999 |
| Jan 8, 2026 | Alumis Inc. | Open-market purchase | +294,117 | $17.00 | $4,999,989 |
| Nov 21, 2025 | Alumis Inc. | Open-market purchase | +72,212 | $7.38 | $532,925 |
Questions about James B. Tananbaum
What boards is James B. Tananbaum on?
James B. Tananbaum sits on the boards of Alumis Inc. and Latigo Biotherapeutics Inc.
How long has James B. Tananbaum served on boards?
Our records show at least 3 years of board service across 2 boards, the earliest from 2024.
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