23 insiders reported 106 Form 4 transactions for Metsera, Inc. (MTSR) over the past 18 months (most recent 2025-11-17). Recent activity: FMR LLC (Insider) Sell 3,010 shares, FMR LLC (Insider) Sell 2.2M shares, ARCH Venture Partners XIII, LLC (Director) Sell 8.3M shares, ARCH Venture Partners XIII, LLC (Director) Sell 18.5M shares, ARCH Venture Fund XIII, L.P. (Director) Sell 18.5M shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2025-11-17 | FMR LLC | Insider | Sell | 3,010 | $0 |
| 2025-11-17 | FMR LLC | Insider | Sell | 2.2M | $0 |
| 2025-11-14 | ARCH Venture Partners XIII, LLC | Director | Sell | 8.3M | $0 |
| 2025-11-14 | ARCH Venture Partners XIII, LLC | 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 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 Fund XII, L.P. | Director | Sell | 18.5M | $0 |
| 2025-11-14 | GILLIS STEVEN | Director | Sell | 18.5M | $0 |
| 2025-11-14 | NELSEN ROBERT | Director | Sell | 18.5M | $0 |
| 2025-11-14 | CRANDELL KEITH | Director | Sell | 18.5M | $0 |
| 2025-11-14 | ARCH Venture Partners XIII, L.P. | Director | Sell | 8.3M | $0 |
| 2025-11-14 | ARCH Venture Partners XIII, L.P. | Director | Sell | 18.5M | $0 |
| 2025-11-14 | ARCH Venture Fund XIII, L.P. | Director | Sell | 8.3M | $0 |
| 2025-11-14 | ARCH Venture Partners 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 Fund XII, L.P. | Director | Sell | 8.3M | $0 |
| 2025-11-14 | GILLIS STEVEN | Director | Sell | 8.3M | $0 |
| 2025-11-14 | NELSEN ROBERT | Director | Sell | 8.3M | $0 |
| 2025-11-14 | CRANDELL KEITH | 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
