20 insiders reported 23 Form 4 transactions for Prime Medicine, Inc. (PRME) over the past 18 months (most recent 2025-08-05). Recent activity: GV 2021, L.P. (Insider) Buy 1.5M shares, GV 2021 GP, L.L.C. (Insider) Buy 1.5M shares, GV 2021 GP, L.P. (Insider) Buy 1.5M shares, Alphabet Inc. (Insider) Buy 1.5M shares, ARCH Venture Partners X, L.P. (Insider) Buy 3.0M shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2025-08-05 | GV 2021, L.P. | Insider | Buy | 1.5M | $5.0M |
| 2025-08-05 | GV 2021 GP, L.L.C. | Insider | Buy | 1.5M | $5.0M |
| 2025-08-05 | GV 2021 GP, L.P. | Insider | Buy | 1.5M | $5.0M |
| 2025-08-05 | Alphabet Inc. | Insider | Buy | 1.5M | $5.0M |
| 2025-08-01 | ARCH Venture Partners X, L.P. | Insider | Buy | 3.0M | $10.0M |
| 2025-08-01 | NELSEN ROBERT | Director | Buy | 3.0M | $10.0M |
| 2025-08-01 | CRANDELL KEITH | Insider | Buy | 3.0M | $10.0M |
| 2025-08-01 | GILLIS STEVEN | Insider | Buy | 3.0M | $10.0M |
| 2025-08-01 | Burow Kristina | Insider | Buy | 3.0M | $10.0M |
| 2025-08-01 | ARCH Venture Fund X, L.P. | Insider | Buy | 3.0M | $10.0M |
| 2025-08-01 | ARCH Venture Fund X Overage, L.P. | Insider | Buy | 3.0M | $10.0M |
| 2025-08-01 | ARCH Venture Partners X Overage, L.P. | Insider | Buy | 3.0M | $10.0M |
| 2025-08-01 | ARCH Venture Partners X, LLC | Insider | Buy | 3.0M | $10.0M |
| 2025-08-01 | ARCH Venture Fund XII, L.P. | Insider | Buy | 3.0M | $10.0M |
| 2025-08-01 | ARCH Venture Partners XII, LLC | Insider | Buy | 3.0M | $10.0M |
| 2025-08-01 | ARCH Venture Partners XII, L.P. | Insider | Buy | 3.0M | $10.0M |
| 2025-07-01 | Liu David R. | Insider | Buy | 21,000 | $52,920 |
| 2025-06-23 | Liu David R. | Insider | Buy | 21,000 | $45,360 |
| 2025-06-16 | Liu David R. | Insider | Buy | 21,000 | $31,290 |
| 2025-06-12 | Liu David R. | Insider | Buy | 21,000 | $33,600 |
| 2025-05-22 | Reine Allan | Chief Executive Officer | Buy | 125,000 | $147,500 |
| 2025-05-22 | Brudnick Richard | Chief Business Officer | Buy | 20,000 | $23,800 |
| 2025-05-22 | LEE ANN L. | Chief Technical Officer | Buy | 100,000 | $113,000 |
Source: SEC Form 4 filings · as of 2025-08-05