Prime Medicine, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Date |
|---|---|---|---|---|---|---|
| Alphabet Inc. | — | Purchase | 1,500,000 | $3.30 | $4,950,000 | Aug 1, 2025 |
| NELSEN ROBERT | — | Purchase | 3,030,300 | $3.30 | $9,999,990 | Aug 1, 2025 |
| ARCH Venture Fund XII, L.P. | — | Purchase | 3,030,300 | $3.30 | $9,999,990 | Aug 1, 2025 |
| GILLIS STEVEN | — | Purchase | 3,030,300 | $3.30 | $9,999,990 | Aug 1, 2025 |
| Liu David R. | — | Purchase | 21,000 | $2.52 | $52,920 | Jun 30, 2025 |
| Liu David R. | — | Purchase | 21,000 | $2.16 | $45,360 | Jun 23, 2025 |
| Liu David R. | — | Purchase | 21,000 | $1.49 | $31,290 | Jun 16, 2025 |
| Liu David R. | — | Purchase | 21,000 | $1.60 | $33,600 | Jun 11, 2025 |
| LEE ANN L. | Chief Technical Officer | Purchase | 100,000 | $1.13 | $113,000 | May 21, 2025 |
| Reine Allan | Chief Executive Officer | Purchase | 125,000 | $1.18 | $147,500 | May 21, 2025 |
| Brudnick Richard | Chief Business Officer | Purchase | 20,000 | $1.19 | $23,800 | May 20, 2025 |
| Gottesdiener Keith Michael | See Remarks | Gift | 226,925 | — | — | Oct 8, 2024 |
| Gottesdiener Keith Michael | See Remarks | Gift | 250,000 | — | — | Jun 5, 2024 |
| NELSEN ROBERT | — | Purchase | 3,200,000 | $6.25 | $20,000,000 | Feb 15, 2024 |
| ARCH Venture Partners XII, LLC | — | Purchase | 3,200,000 | $6.25 | $20,000,000 | Feb 15, 2024 |
| ARCH Venture Partners X, L.P. | — | Purchase | 3,200,000 | $6.25 | $20,000,000 | Feb 15, 2024 |
| Gottesdiener Keith Michael | See Remarks | Gift | 5,000 | — | — | Nov 11, 2023 |
| Liu David R. | — | Gift | 1,000,000 | — | — | Jul 21, 2023 |
| Liu David R. | — | Gift | 1,000,000 | — | — | Jul 21, 2023 |
| GV 2021 GP, L.P. | — | Sale | 19,003 | $14.97 | $284,475 | Jun 20, 2023 |
| Alphabet Inc. | — | Other | 6,532 | — | — | Jun 15, 2023 |
| GV 2021 GP, L.P. | — | Other | 28,100 | — | — | Jun 13, 2023 |
| GV 2019 GP, L.L.C. | — | Sale | 16,031 | $14.98 | $240,144 | Jun 12, 2023 |
| GV 2021 GP, L.P. | — | Sale | 5,000 | $15.74 | $78,700 | Jun 8, 2023 |
| GV 2021 GP, L.P. | — | Other | 29,975 | — | — | Jun 5, 2023 |
| GV 2021 GP, L.L.C. | — | Other | 45,223 | — | — | May 31, 2023 |
| GV 2019 GP, L.L.C. | — | Sale | 16,805 | $13.70 | $230,229 | May 26, 2023 |
| Alphabet Inc. | — | Other | 7,900 | — | — | May 24, 2023 |
| Alphabet Inc. | — | Sale | 43,939 | $14.74 | $647,661 | May 22, 2023 |
| GV 2021 GP, L.P. | — | Other | 63,212 | — | — | May 18, 2023 |
| GV 2021, L.P. | — | Sale | 50,649 | $12.59 | $637,671 | May 17, 2023 |
| GV 2019 GP, L.L.C. | — | Sale | 157,952 | $12.74 | $2,012,308 | May 12, 2023 |
| GV 2019, L.P. | — | Sale | 87,397 | $14.03 | $1,226,180 | May 11, 2023 |
| GV 2021 GP, L.P. | — | Sale | 100,772 | $14.13 | $1,423,908 | May 9, 2023 |
| GV 2021, L.P. | — | C | 1,762,440 | — | — | Oct 24, 2022 |
| ARCH Venture Partners X, LLC | — | Purchase | 400,000 | $17.00 | $6,800,000 | Oct 24, 2022 |
| NELSEN ROBERT | — | C | 16,080 | — | — | Oct 24, 2022 |
| Liu David R. | — | C | 321,665 | — | — | Oct 24, 2022 |
| Cahill Thomas | — | Purchase | 400,000 | $17.00 | $6,800,000 | Oct 24, 2022 |
| FMR LLC | — | C | 98,967 | — | — | Oct 24, 2022 |