SPRINGER TIMOTHY A (CIK 1055624) reported 29 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-01-06). Recent activity: Buy RNAC (2,600 shares), Buy RNAC (7,342 shares), Buy RNAC (31 shares), Buy RNAC (41,604 shares), Buy RNAC (178 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-01-06 | Cartesian Therapeutics, Inc. (RNAC) | Director | Buy | 2,600 | $0 |
| 2025-04-11 | Cartesian Therapeutics, Inc. (RNAC) | Director | Buy | 7,342 | $69,235 |
| 2025-04-11 | Cartesian Therapeutics, Inc. (RNAC) | Director | Buy | 31 | $308 |
| 2025-04-11 | Cartesian Therapeutics, Inc. (RNAC) | Director | Buy | 41,604 | $392,326 |
| 2025-04-11 | Cartesian Therapeutics, Inc. (RNAC) | Director | Buy | 178 | $1,771 |
| 2025-04-11 | Cartesian Therapeutics, Inc. (RNAC) | Director | Buy | 7,966 | $83,085 |
| 2025-04-11 | Cartesian Therapeutics, Inc. (RNAC) | Director | Buy | 609 | $6,650 |
| 2025-04-11 | Cartesian Therapeutics, Inc. (RNAC) | Director | Buy | 45,144 | $470,852 |
| 2025-04-11 | Cartesian Therapeutics, Inc. (RNAC) | Director | Buy | 3,451 | $37,685 |
| 2025-04-11 | Cartesian Therapeutics, Inc. (RNAC) | Director | Buy | 6,412 | $69,057 |
| 2025-04-11 | Cartesian Therapeutics, Inc. (RNAC) | Director | Buy | 36,338 | $391,360 |
| 2025-04-11 | Tectonic Therapeutic, Inc. (TECX) | Director | Buy | 2,861 | $41,828 |
| 2025-04-11 | Tectonic Therapeutic, Inc. (TECX) | Director | Buy | 857 | $13,052 |
| 2025-04-11 | Tectonic Therapeutic, Inc. (TECX) | Director | Buy | 8,092 | $135,379 |
| 2025-04-11 | Tectonic Therapeutic, Inc. (TECX) | Director | Buy | 9,478 | $154,586 |
| 2025-04-11 | Tectonic Therapeutic, Inc. (TECX) | Director | Buy | 16,215 | $237,063 |
| 2025-04-11 | Tectonic Therapeutic, Inc. (TECX) | Director | Buy | 4,856 | $73,957 |
| 2025-04-11 | Tectonic Therapeutic, Inc. (TECX) | Director | Buy | 45,858 | $767,204 |
| 2025-04-11 | Tectonic Therapeutic, Inc. (TECX) | Director | Buy | 53,706 | $875,945 |
| 2025-04-09 | Tectonic Therapeutic, Inc. (TECX) | Director | Buy | 87,500 | $1.5M |
| 2025-04-09 | Tectonic Therapeutic, Inc. (TECX) | Director | Buy | 412,500 | $7.1M |
| 2025-03-20 | Cartesian Therapeutics, Inc. (RNAC) | Director | Buy | 14,740 | $212,551 |
| 2025-03-20 | Cartesian Therapeutics, Inc. (RNAC) | Director | Buy | 20,234 | $302,903 |
| 2025-03-20 | Cartesian Therapeutics, Inc. (RNAC) | Director | Buy | 54,889 | $855,720 |
| 2025-02-07 | Tectonic Therapeutic, Inc. (TECX) | Director | Buy | 129,294 | $7.0M |
Source: SEC Form 4 filings · as of 2026-01-06