22 insiders reported 61 Form 4 transactions for Metsera, Inc. (MTSR) over the past 18 months (most recent 2025-11-17). Recent activity: FMR LLC (10% Owner) Sell 3,010 shares, FMR LLC (10% Owner) Sell 2.2M shares, NELSEN ROBERT (Director) Sell 8.3M shares, NELSEN ROBERT (Director) Sell 18.5M shares, GILLIS STEVEN (Director) Sell 18.5M shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2025-11-17 | FMR LLC | 10% Owner | Sell | 3,010 | $0 |
| 2025-11-17 | FMR LLC | 10% Owner | Sell | 2.2M | $0 |
| 2025-11-14 | NELSEN ROBERT | Director | Sell | 8.3M | $0 |
| 2025-11-14 | NELSEN ROBERT | Director | Sell | 18.5M | $0 |
| 2025-11-14 | GILLIS STEVEN | Director | Sell | 18.5M | $0 |
| 2025-11-14 | ARCH Venture Fund XII, L.P. | Director | Sell | 18.5M | $0 |
| 2025-11-14 | ARCH Venture Partners XII, LLC | Director | Sell | 18.5M | $0 |
| 2025-11-14 | ARCH Venture Partners XII, L.P. | Director | Sell | 18.5M | $0 |
| 2025-11-14 | ARCH Venture Fund XIII, L.P. | Director | Sell | 18.5M | $0 |
| 2025-11-14 | ARCH Venture Partners XIII, LLC | Director | Sell | 18.5M | $0 |
| 2025-11-14 | ARCH Venture Partners XIII, L.P. | Director | Sell | 18.5M | $0 |
| 2025-11-14 | CRANDELL KEITH | Director | Sell | 8.3M | $0 |
| 2025-11-14 | CRANDELL KEITH | Director | Sell | 18.5M | $0 |
| 2025-11-14 | GILLIS STEVEN | Director | Sell | 8.3M | $0 |
| 2025-11-14 | ARCH Venture Fund XII, L.P. | Director | Sell | 8.3M | $0 |
| 2025-11-14 | ARCH Venture Partners XII, LLC | Director | Sell | 8.3M | $0 |
| 2025-11-14 | ARCH Venture Partners XII, L.P. | Director | Sell | 8.3M | $0 |
| 2025-11-14 | ARCH Venture Fund XIII, L.P. | Director | Sell | 8.3M | $0 |
| 2025-11-14 | ARCH Venture Partners XIII, LLC | Director | Sell | 8.3M | $0 |
| 2025-11-14 | ARCH Venture Partners XIII, L.P. | Director | Sell | 8.3M | $0 |
| 2025-11-13 | Stonehouse Jon P | Director | Sell | 2,688 | $0 |
| 2025-11-13 | Marso Steven | CHIEF MEDICAL OFFICER | Sell | 17,000 | $0 |
| 2025-11-13 | Burow Kristina | Director | Sell | 2,688 | $0 |
| 2025-11-13 | Burow Kristina | Director | Sell | 17.1M | $0 |
| 2025-11-13 | Burow Kristina | Director | Sell | 18.5M | $0 |
Source: SEC Form 4 filings · as of 2025-11-17