Prime Medicine, Inc. (PRME) Insider Trading
Directors, officers and holders of more than 10% of PRME report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 102 transactions on file: 2 with code P, 0 with code S and 48 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 5, 2026 | Chung Wendy | Director | A Award | 75,000 | Not measured | Not measured |
| Jun 5, 2026 | Cahill Thomas | Director | A Award | 75,000 | Not measured | Not measured |
| Jun 5, 2026 | Kelly Michael Aaron | Director | A Award | 75,000 | Not measured | Not measured |
| Jun 5, 2026 | Marrazzo Jeffrey D | Director | A Award | 75,000 | Not measured | Not measured |
| Jun 5, 2026 | NELSEN ROBERT | Director | A Award | 75,000 | Not measured | Not measured |
| Jun 5, 2026 | Schenkein David P | Director | A Award | 75,000 | Not measured | Not measured |
| Jun 5, 2026 | Foster-Cheek Kaye I | Director | A Award | 75,000 | Not measured | Not measured |
| Apr 16, 2026 | Makhni Svetlana Ni | Chief Financial Officer | A Award | 800,000 | Not measured | Not measured |
| Feb 26, 2026 | Reine Allan | Chief Executive Officer | A Award | 1,300,000 | Not measured | Not measured |
| Feb 23, 2026 | Alenson Carman | See Remarks | A Award | 140,000 | Not measured | Not measured |
| Feb 23, 2026 | LEE ANN L. | Chief Technical Officer | A Award | 375,000 | Not measured | Not measured |
| Aug 1, 2025 | LEE ANN L. | Chief Technical Officer | D Disposition | 180,995 | Not measured | Not measured |
| Aug 1, 2025 | Cahill Thomas | Director | A Award | 39,062 | Not measured | Not measured |
| Aug 1, 2025 | LEE ANN L. | Chief Technical Officer | A Award | 180,995 | Not measured | Not measured |
| Aug 1, 2025 | Chung Wendy | Director | A Award | 9,006 | Not measured | Not measured |
| Aug 1, 2025 | NELSEN ROBERT | Director | P Purchase | 3,030,300 | $3.30 | $9,999,990 |
| Aug 1, 2025 | Chung Wendy | Director | D Disposition | 39,062 | Not measured | Not measured |
| Aug 1, 2025 | Cahill Thomas | Director | D Disposition | 45,000 | Not measured | Not measured |
| Aug 1, 2025 | Foster-Cheek Kaye I | Director | D Disposition | 13,510 | Not measured | Not measured |
| Aug 1, 2025 | Chung Wendy | Director | A Award | 39,062 | Not measured | Not measured |
| Aug 1, 2025 | NELSEN ROBERT | Director | A Award | 45,000 | Not measured | Not measured |
| Aug 1, 2025 | Foster-Cheek Kaye I | Director | A Award | 13,510 | Not measured | Not measured |
| Aug 1, 2025 | Foster-Cheek Kaye I | Director | D Disposition | 9,006 | Not measured | Not measured |
| Aug 1, 2025 | Foster-Cheek Kaye I | Director | A Award | 9,006 | Not measured | Not measured |
| Aug 1, 2025 | Foster-Cheek Kaye I | Director | D Disposition | 39,062 | Not measured | Not measured |
| Aug 1, 2025 | Foster-Cheek Kaye I | Director | A Award | 39,062 | Not measured | Not measured |
| Aug 1, 2025 | Foster-Cheek Kaye I | Director | D Disposition | 45,000 | Not measured | Not measured |
| Aug 1, 2025 | Foster-Cheek Kaye I | Director | A Award | 45,000 | Not measured | Not measured |
| Aug 1, 2025 | Schenkein David P | Director | D Disposition | 39,062 | Not measured | Not measured |
| Aug 1, 2025 | Schenkein David P | Director | A Award | 39,062 | Not measured | Not measured |
| Aug 1, 2025 | NELSEN ROBERT | Director | D Disposition | 45,000 | Not measured | Not measured |
| Aug 1, 2025 | ARCH Venture Partners XII, LLC | 10% Owner | P Purchase | 3,030,300 | $3.30 | $9,999,990 |
| Aug 1, 2025 | Chung Wendy | Director | D Disposition | 45,000 | Not measured | Not measured |
| Aug 1, 2025 | Marrazzo Jeffrey D | Director | D Disposition | 45,000 | Not measured | Not measured |
| Aug 1, 2025 | NELSEN ROBERT | Director | A Award | 39,062 | Not measured | Not measured |
| Aug 1, 2025 | Marrazzo Jeffrey D | Director | A Award | 250,000 | Not measured | Not measured |
| Aug 1, 2025 | Marrazzo Jeffrey D | Director | D Disposition | 250,000 | Not measured | Not measured |
| Aug 1, 2025 | Marrazzo Jeffrey D | Director | A Award | 45,000 | Not measured | Not measured |
| Aug 1, 2025 | Kelly Michael Aaron | Director | D Disposition | 13,510 | Not measured | Not measured |
| Aug 1, 2025 | Kelly Michael Aaron | Director | A Award | 13,510 | Not measured | Not measured |
| Aug 1, 2025 | Kelly Michael Aaron | Director | D Disposition | 9,006 | Not measured | Not measured |
| Aug 1, 2025 | Kelly Michael Aaron | Director | A Award | 9,006 | Not measured | Not measured |
| Aug 1, 2025 | Kelly Michael Aaron | Director | D Disposition | 39,062 | Not measured | Not measured |
| Aug 1, 2025 | Kelly Michael Aaron | Director | A Award | 39,062 | Not measured | Not measured |
| Aug 1, 2025 | Kelly Michael Aaron | Director | D Disposition | 45,000 | Not measured | Not measured |
| Aug 1, 2025 | Kelly Michael Aaron | Director | A Award | 45,000 | Not measured | Not measured |
| Aug 1, 2025 | Chung Wendy | Director | D Disposition | 13,510 | Not measured | Not measured |
| Aug 1, 2025 | Chung Wendy | Director | A Award | 13,510 | Not measured | Not measured |
| Aug 1, 2025 | Chung Wendy | Director | D Disposition | 9,006 | Not measured | Not measured |
| Aug 1, 2025 | NELSEN ROBERT | Director | D Disposition | 39,062 | Not measured | Not measured |
The full Form 4 history is on the PRME company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.