Who
Marcella K. Ruddy
Chief Medical Officer
Company insider
Files Form 4 as: Chief Medical Officer, Tectonic Therapeutic; Director, Sionna Therapeutics; Director, Upstream Bio.
In numbers
- Trades disclosed
- 31
- Buys
- 0
- Sells
- 3
- Bought
- $0
- Sold
- $726K
- Companies
- 3
- Companies where not an officer
- 2
- First trade
- 20 Jun 2024
- Last trade
- 25 Sep 2026
- Last filed
- 2 Oct 2026
Companies traded
Activity over time
1 Mar – 1 Oct
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 25 Sep 2026filed 2 Oct 2026 | TECX Tectonic TherapeuticBiotechnology | SEC FORM 4 Code F | $12K525 at $23.67 | filing |
| 3 Sep 2026filed 8 Sep 2026 | TECX Tectonic Therapeuticoption or derivative · Biotechnology | SEC FORM 4 Code A | —24,250 at $0.00 | filing |
| 3 Sep 2026filed 8 Sep 2026 | TECX Tectonic Therapeuticoption or derivative · Biotechnology | SEC FORM 4 Code A | —24,250 at $0.00 | filing |
| 17 Jun 2026filed 18 Jun 2026 | SION Sionna Therapeuticsoption or derivative · Biotechnology | SEC FORM 4 Code A | —17,340 at $0.00 | filing |
| 17 Jun 2026filed 18 Jun 2026 | SION Sionna Therapeuticsoption or derivative · Biotechnology | SEC FORM 4 Code A | —17,340 at $0.00 | filing |
| 9 Jun 2026filed 11 Jun 2026 | UPB Upstream Biooption or derivative · Biotechnology | SEC FORM 4 Code A | —17,096 at $0.00 | filing |
| 9 Jun 2026filed 11 Jun 2026 | UPB Upstream Biooption or derivative · Biotechnology | SEC FORM 4 Code A | —17,096 at $0.00 | filing |
| 4 May 2026filed 6 May 2026 | TECX Tectonic TherapeuticBiotechnology | SEC FORM 4 Sold | $32K1,065 at $30.00 | filing |
| 4 May 2026filed 6 May 2026 | TECX Tectonic TherapeuticBiotechnology | SEC FORM 4 Sold | $32K1,065 at $30.00 | filing |
| 1 Apr 2026filed 3 Apr 2026 | TECX Tectonic TherapeuticBiotechnology | SEC FORM 4 Sold | $31K1,000 at $31.05 | filing |
| 1 Apr 2026filed 3 Apr 2026 | TECX Tectonic TherapeuticBiotechnology | SEC FORM 4 Sold | $31K1,000 at $31.05 | filing |
| 6 Mar 2026filed 9 Mar 2026 | TECX Tectonic TherapeuticBiotechnology | SEC FORM 4 Sold | $300K10,000 at $30.00 | filing |
| 6 Mar 2026filed 9 Mar 2026 | TECX Tectonic TherapeuticBiotechnology | SEC FORM 4 Sold | $300K10,000 at $30.00 | filing |
| 4 Mar 2026filed 5 Mar 2026 | TECX Tectonic TherapeuticBiotechnology | SEC FORM 4 Code A | —26,500 at $0.00 | filing |
| 4 Mar 2026filed 5 Mar 2026 | TECX Tectonic Therapeuticoption or derivative · Biotechnology | SEC FORM 4 Code A | —24,250 at $0.00 | filing |
| 4 Mar 2026filed 5 Mar 2026 | TECX Tectonic Therapeuticoption or derivative · Biotechnology | SEC FORM 4 Code A | —24,250 at $0.00 | filing |
| 4 Mar 2026filed 5 Mar 2026 | TECX Tectonic TherapeuticBiotechnology | SEC FORM 4 Code A | —26,500 at $0.00 | filing |
| 4 Feb 2026filed 10 Feb 2026 | TECX Tectonic TherapeuticBiotechnology | SEC FORM 4 Code F | $48K2,064 at $23.22 | filing |
| 4 Feb 2026filed 10 Feb 2026 | TECX Tectonic TherapeuticBiotechnology | SEC FORM 4 Code F | $48K2,064 at $23.22 | filing |
| 25 Sep 2025filed 29 Sep 2025 | TECX Tectonic Therapeuticoption or derivative · Biotechnology | SEC FORM 4 Code A | —9,750 at $0.00 | filing |
News
No headline names them, or the companies they trade most, lately.