ARCH Venture Partners XII, LLC (CIK 1979548) reported 8 SEC Form 4 insider transactions across 3 companies over the past 18 months (most recent 2025-11-14). Recent activity: Sell MTSR (18.5M shares), Sell MTSR (8.3M shares), Buy NMRA (1.9M shares), Buy PRME (3.0M shares), Buy MTSR (16.0M shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2025-11-14 | Metsera, Inc. (MTSR) | Director | Sell | 18.5M | $0 |
| 2025-11-14 | Metsera, Inc. (MTSR) | Director | Sell | 8.3M | $0 |
| 2025-10-29 | Neumora Therapeutics, Inc. (NMRA) | Insider | Buy | 1.9M | $5.0M |
| 2025-08-01 | Prime Medicine, Inc. (PRME) | Insider | Buy | 3.0M | $10.0M |
| 2025-02-03 | Metsera, Inc. (MTSR) | Insider | Buy | 16.0M | $0 |
| 2025-02-03 | Metsera, Inc. (MTSR) | Insider | Buy | 7.5M | $0 |
| 2025-02-03 | Metsera, Inc. (MTSR) | Insider | Buy | 1.4M | $25.8M |
| 2025-02-03 | Metsera, Inc. (MTSR) | Insider | Buy | 789,998 | $14.2M |
Source: SEC Form 4 filings · as of 2025-11-14