SPRINGER TIMOTHY A
SEC insider (Form 3/4/5 filer). CIK 0001055624. Director & 10% Owner at Tectonic Therapeutic, Inc. (TECX) and 1 other issuer. 69 reported Form 4/5 transactions since Sep 2024; latest on Jun 9, 2026. Located in WATERTOWN, MA.
Companies SPRINGER TIMOTHY A has filed insider reports for
- Tectonic Therapeutic, Inc. (TECX): Director, 10% Owner
- Cartesian Therapeutics, Inc. (RNAC): Director, 10% Owner
SPRINGER TIMOTHY A
CIK: 0001055624
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 (69 total)
- Jun 9, 2026TECX
Tectonic Therapeutic, Inc.
AwardDirectStock Option (Right to Buy)
10.2K shares- - Jan 2, 2026RNAC
Cartesian Therapeutics, Inc.
AwardDirect2.6K shares- - Jun 9, 2025TECX
Tectonic Therapeutic, Inc.
AwardDirectStock Option (Right to Buy)
10.2K shares- - Apr 11, 2025TECX
Tectonic Therapeutic, Inc.
PurchaseDirect9.5K shares at avg. $16.31$155K - Apr 11, 2025TECX
Tectonic Therapeutic, Inc.
PurchaseIndirect53.7K shares at avg. $16.31$876K - Apr 11, 2025RNAC
Cartesian Therapeutics, Inc.
PurchaseIndirect36.3K shares at avg. $10.77$391K - Apr 11, 2025RNAC
Cartesian Therapeutics, Inc.
PurchaseDirect6.4K shares at avg. $10.77$69K - Apr 10, 2025TECX
Tectonic Therapeutic, Inc.
PurchaseDirect8.1K shares at avg. $16.73$135K - Apr 10, 2025TECX
Tectonic Therapeutic, Inc.
PurchaseIndirect45.9K shares at avg. $16.73$767K - Apr 10, 2025RNAC
Cartesian Therapeutics, Inc.
PurchaseIndirect45.1K shares at avg. $10.43$471K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Jun 9, 2026 |  TECX Tectonic Therapeutic, Inc. | Award Stock Option (Right to Buy) | 10,200 | - | - | Direct |
| Jan 2, 2026 |  RNAC Cartesian Therapeutics, Inc. | Award | 2,600 | - | $0 | Direct |
| Jun 9, 2025 | TECX Tectonic Therapeutic, Inc. | Award Stock Option (Right to Buy) | 10,200 | - | - | Direct |
| Apr 11, 2025 | TECX Tectonic Therapeutic, Inc. | Purchase | 9,478 | $16.31 | $154,586 | Direct |
| Apr 11, 2025 | TECX Tectonic Therapeutic, Inc. | Purchase | 53,706 | $16.31 | $875,945 | Indirect |
| Apr 11, 2025 | RNAC Cartesian Therapeutics, Inc. | Purchase | 36,338 | $10.77 | $391,455 | Indirect |
| Apr 11, 2025 | RNAC Cartesian Therapeutics, Inc. | Purchase | 6,412 | $10.77 | $69,074 | Direct |
| Apr 10, 2025 | TECX Tectonic Therapeutic, Inc. | Purchase | 8,092 | $16.73 | $135,379 | Direct |
| Apr 10, 2025 | TECX Tectonic Therapeutic, Inc. | Purchase | 45,858 | $16.73 | $767,204 | Indirect |
| Apr 10, 2025 | RNAC Cartesian Therapeutics, Inc. | Purchase | 45,144 | $10.43 | $471,055 | Indirect |
1-10 of 69 transactions