Prime Medicine
Develops Prime Editing therapies for liver, lung, and partnered cell-therapy programs.
$3.59
After-hours close−0.02 (−0.61%)
At close$3.61(−0.77%)
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Breakdown13F · Form 4
Institutions 59.80%108.00M sharesInsiders 3.59%6.48M sharesOther 36.61%66.14M shares
Shares outstanding 180.62M · Float 59.17M · 32.8% free float
Institutions13F, as of Jun 30, 2026
194 holders · 108.00M shares · 24 new positions · 87 increased · 69 reduced · 27 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Alphabet Inc. | 16.56M | 9.17% | 0 | Aug 7, 2026 |
| BlackRock, Inc. | 9.60M | 5.32% | +1.10M | Aug 7, 2026 |
| Ark Investment Management LLC | 8.35M | 4.62% | +2.10M | Aug 14, 2026 |
| State Street Corp | 7.58M | 4.19% | +1.23M | Aug 7, 2026 |
| T. Rowe Price Investment Management, Inc. | 5.24M | 2.90% | −244.6K | Aug 14, 2026 |
| Vanguard Capital Management LLC | 4.52M | 2.50% | +48.5K | Aug 13, 2026 |
| Balyasny Asset Management L.P. | 3.97M | 2.20% | −154.3K | Aug 14, 2026 |
| Goldman Sachs Group Inc | 3.43M | 1.90% | +2.46M | Aug 14, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Robert Nelsenincl. ARCH Venture Fund XII, L.P., Steven Gillis +9 more | 10.40% | 18.59M | 13D | Aug 11, 2025 ↗ |
| Bristol-Myers Squibb Company | 8.40% | 11.01M | 13G | Oct 4, 2024 ↗ |
| GV 2019, L.P. | 7.50% | 10.10M | 13G | Nov 12, 2025 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Liu David R. | 10 percent owner | 20.24M | 11.21% | Jul 1, 2025 |
| Robert Nelsen | director, 10 percent owner: | 6.23M | 3.45% | Aug 1, 2025 |
| GV 2021 GP, L.L.C. | 10 percent owner | 3.26M | 1.81% | Aug 5, 2025 |
| Allan Reine | director, officer: Chief Executive Officer | 125.0K | 0.07% | May 22, 2025 |
| Ann L. Lee | officer: Chief Technical Officer | 100.0K | 0.06% | May 22, 2025 |
| Richard Brudnick | officer: Chief Business Officer | 20.0K | 0.01% | May 22, 2025 |
5 ten-percent owners hold 33.10M shares by Form 4, outside the officers-and-directors figure above · 5 people have not refiled in the last 18 months (6.20M shares), so they are not in the figure above
Latest trades
No open-market trades in the last 12 months.
CongressHouse and Senate disclosures
Not reported.