Time on boards
- Boards served
- 2
- Current seats
- 2
- Board service
- 4 years
- Director since
- 2024
4 years of board service in total across 2 boards, counting each seat separately. Longest: Upstream Bio 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.
-
Sionna Therapeutics Inc. June 17, 202695.4%
-
Upstream Bio Inc. June 10, 202599.2%
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 |
|---|---|---|---|---|---|
| Sep 25, 2026 | Tectonic Therapeutic Inc. | Shares withheld for tax | −525 | $23.67 | $12,427 |
| May 4, 2026 | Tectonic Therapeutic Inc. | Open-market sale | −1,065 | $30.00 | $31,950 |
| Apr 1, 2026 | Tectonic Therapeutic Inc. | Open-market sale | −1,000 | $31.05 | $31,050 |
| Mar 6, 2026 | Tectonic Therapeutic Inc. | Open-market sale | −10,000 | $30.00 | $300,000 |
| Mar 4, 2026 | Tectonic Therapeutic Inc. | Grant or award | +26,500 | — | — |
| Feb 4, 2026 | Tectonic Therapeutic Inc. | Shares withheld for tax | −2,064 | $23.22 | $47,926 |
| Sep 25, 2025 | Tectonic Therapeutic Inc. | Grant or award | +5,370 | — | — |
| Feb 4, 2025 | Tectonic Therapeutic Inc. | Grant or award | +17,876 | — | — |
Questions about Marcella K. Ruddy
What boards is Marcella K. Ruddy on?
Marcella K. Ruddy sits on the boards of Sionna Therapeutics Inc. and Upstream Bio Inc.
How long has Marcella K. Ruddy served on boards?
Our records show at least 4 years of board service across 2 boards, the earliest from 2024.
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