Time on boards
- Boards served
- 2
- Current seats
- 2
- Board service
- 7 years
- Director since
- 2023
7 years of board service in total across 2 boards, counting each seat separately. Longest: Atara Biotherapeutics Inc., 3 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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Atara Biotherapeutics Inc. June 10, 202490.5%
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 |
|---|---|---|---|---|---|
| Jun 9, 2026 | Atara Biotherapeutics Inc. | Grant or award | +12,000 | — | — |
| May 18, 2026 | MacroGenics Inc. | Option exercise | +3,750 | — | — |
| Aug 20, 2025 | MacroGenics Inc. | Open-market purchase | +49,500 | $1.49 | $73,755 |
| Aug 19, 2025 | MacroGenics Inc. | Open-market purchase | +50,500 | $1.52 | $76,760 |
| Jun 10, 2025 | Atara Biotherapeutics Inc. | Grant or award | +7,828 | — | — |
| May 20, 2025 | MacroGenics Inc. | Option exercise | +6,500 | — | — |
| May 20, 2024 | MacroGenics Inc. | Option exercise | +4,500 | — | — |
| Mar 31, 2024 | Atara Biotherapeutics Inc. | Grant or award | +150,000 | — | — |
| Nov 10, 2023 | Atara Biotherapeutics Inc. | Open-market purchase | +100,000 | $0.25 | $25,000 |
| May 31, 2023 | Atara Biotherapeutics Inc. | Grant or award | +57,000 | — | — |
Questions about William K. Heiden
What boards is William K. Heiden on?
William K. Heiden sits on the boards of Atara Biotherapeutics Inc. and MacroGenics Inc.
How long has William K. Heiden served on boards?
Our records show at least 7 years of board service across 2 boards, the earliest from 2023.
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