Marcella K. Ruddy
CIK: 0002023849
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (15 total)
- Sep 25, 2026TECX
Tectonic Therapeutic, Inc.
Tax Payment(F)Direct525 shares at avg. $23.67$12K - Sep 3, 2026TECX
Tectonic Therapeutic, Inc.
Award(A)DirectEmployee Stock Option (Right to Buy)
24.3K shares- - Jun 17, 2026SION
Sionna Therapeutics, Inc.
Award(A)DirectNon-Qualified Stock Option (right to buy)
17.3K shares- - Jun 9, 2026UPB
Upstream Bio, Inc.
Award(A)DirectStock Option (Right to Buy)
17.1K shares- - May 4, 2026TECX
Tectonic Therapeutic, Inc.
Sale(S)Direct1.1K shares at avg. $30.00$32K - Apr 1, 2026TECX
Tectonic Therapeutic, Inc.
Sale(S)Direct1K shares at avg. $31.05$31K - Mar 6, 2026TECX
Tectonic Therapeutic, Inc.
Sale(S)Direct10K shares at avg. $30.00$300K - Mar 4, 2026TECX
Tectonic Therapeutic, Inc.
Award(A)Direct26.5K shares- - Feb 4, 2026TECX
Tectonic Therapeutic, Inc.
Tax Payment(F)Direct2.1K shares at avg. $23.22$48K - Sep 25, 2025TECX
Tectonic Therapeutic, Inc.
Award(A)Direct5.4K shares- - Jun 12, 2025SION
Sionna Therapeutics, Inc.
Award(A)DirectNon-Qualified Stock Option (right to buy)
20K shares- - Jun 10, 2025UPB
Upstream Bio, Inc.
Award(A)DirectStock Option (Right to Buy)
17.1K shares- - Feb 6, 2025SION
Sionna Therapeutics, Inc.
Award(A)DirectStock Option (Right to Buy)
39.9K shares- - Feb 4, 2025TECX
Tectonic Therapeutic, Inc.
Award(A)Direct17.9K shares- - Oct 10, 2024UPB
Upstream Bio, Inc.
Award(A)DirectStock Option (Right to Buy)
17.1K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Sep 25, 2026 |  TECX Tectonic Therapeutic, Inc. | Tax Payment(F) | 525 | $23.67 | $12,427 | Direct |
| Sep 3, 2026 | TECX Tectonic Therapeutic, Inc. | Award(A) Employee Stock Option (Right to Buy) | 24,250 | - | - | Direct |
| Jun 17, 2026 |  SION Sionna Therapeutics, Inc. | Award(A) Non-Qualified Stock Option (right to buy) | 17,340 | - | - | Direct |
| Jun 9, 2026 |  UPB Upstream Bio, Inc. | Award(A) Stock Option (Right to Buy) | 17,096 | - | - | Direct |
| May 4, 2026 | TECX Tectonic Therapeutic, Inc. | Sale(S) | 1,065 | $30.00 | $31,950 | Direct |
| Apr 1, 2026 | TECX Tectonic Therapeutic, Inc. | Sale(S) | 1,000 | $31.05 | $31,050 | Direct |
| Mar 6, 2026 | TECX Tectonic Therapeutic, Inc. | Sale(S) | 10,000 | $30.00 | $300,000 | Direct |
| Mar 4, 2026 | TECX Tectonic Therapeutic, Inc. | Award(A) | 26,500 | - | $0 | Direct |
| Feb 4, 2026 | TECX Tectonic Therapeutic, Inc. | Tax Payment(F) | 2,064 | $23.22 | $47,926 | Direct |
| Sep 25, 2025 | TECX Tectonic Therapeutic, Inc. | Award(A) | 5,370 | - | - | Direct |
| Jun 12, 2025 | SION Sionna Therapeutics, Inc. | Award(A) Non-Qualified Stock Option (right to buy) | 19,959 | - | - | Direct |
| Jun 10, 2025 | UPB Upstream Bio, Inc. | Award(A) Stock Option (Right to Buy) | 17,096 | - | - | Direct |
| Feb 6, 2025 | SION Sionna Therapeutics, Inc. | Award(A) Stock Option (Right to Buy) | 39,919 | - | - | Direct |
| Feb 4, 2025 | TECX Tectonic Therapeutic, Inc. | Award(A) | 17,876 | - | - | Direct |
| Oct 10, 2024 | UPB Upstream Bio, Inc. | Award(A) Stock Option (Right to Buy) | 17,096 | - | - | Direct |
1-15 of 15 transactions
About Ruddy Marcella K.
Ruddy Marcella K. (SEC CIK 0002023849) files insider reports with the SEC as Chief Medical Officer of Tectonic Therapeutic, Inc. (TECX), Director of Sionna Therapeutics, Inc. (SION) and Director of Upstream Bio, Inc. (UPB).
Signal8 holds 17 ownership filings by Ruddy Marcella K. (2 Form 3, 15 Form 4), filed between Oct 10, 2024 and Oct 2, 2026. Those filings report 15 transactions, from Oct 10, 2024 to Sep 25, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Ruddy Marcella K.'s filings is in WATERTOWN, MA.
Recent filings by Ruddy Marcella K.
- Sep 25, 2026: Tax withholding of TECX shares (Form 4, code F).
- Sep 3, 2026: Grant or award of TECX derivative securities (Form 4, code A).
- Jun 17, 2026: Grant or award of SION derivative securities (Form 4, code A).
- Jun 9, 2026: Grant or award of UPB derivative securities (Form 4, code A).
- May 4, 2026: Open-market sale of TECX shares (Form 4, code S).
Other insiders filing for Tectonic Therapeutic, Inc. (TECX)
- REICIN ALISE, Chief Executive Officer
- Lochner Daniel, Chief Financial Officer
- McNamara Peter, Chief Scientific Officer
- Schwabish Marc, Chief Business Officer
- SPRINGER TIMOTHY A, Director
- Tipirneni Praveen P., Director