Over the past 12 months, 4 insiders at Prime Medicine, Inc. filed 4 open-market SEC Form 4 transactions on PRME: 4 purchases worth $34.9M and 0 sales worth $0. Insiders have been net buyers over this period. The most recent filing was on Aug 1, 25.
| Date | Insider | Type | Shares | Price | Value |
|---|---|---|---|---|---|
| Aug 1, 25 | Arch Venture Fund Xii, L.p.TenPercentOwner | BUY | 3.03M | $3.30 | $10.0M |
| Aug 1, 25 | Alphabet Inc.TenPercentOwner | BUY | 1.50M | $3.30 | $5.0M |
| Aug 1, 25 | Steven GillisTenPercentOwner | BUY | 3.03M | $3.30 | $10.0M |
| Aug 1, 25 | Robert NelsenDirector,TenPercentOwner | BUY | 3.03M | $3.30 | $10.0M |
| Jun 30, 25 | David R. LiuTenPercentOwner | BUY | 21.0K | $2.52 | $53K |
| Jun 23, 25 | David R. LiuTenPercentOwner | BUY | 21.0K | $2.16 | $45K |
| Jun 16, 25 | David R. LiuTenPercentOwner | BUY | 21.0K | $1.49 | $31K |
| Jun 11, 25 | David R. LiuTenPercentOwner | BUY | 21.0K | $1.60 | $34K |
| May 21, 25 | Ann L. LeeChief Technical Officer | BUY | 100.0K | $1.13 | $113K |
| May 21, 25 | Allan ReineChief Executive Officer | BUY | 125.0K | $1.18 | $148K |
| May 20, 25 | Richard BrudnickChief Business Officer | BUY | 20.0K | $1.19 | $24K |
| Feb 15, 24 | Arch Venture Partners X, L.p.TenPercentOwner | BUY | 3.20M | $6.25 | $20.0M |
| Feb 15, 24 | Arch Venture Partners Xii, LlcTenPercentOwner | BUY | 3.20M | $6.25 | $20.0M |
| Feb 15, 24 | Robert NelsenDirector,TenPercentOwner | BUY | 3.20M | $6.25 | $20.0M |
| Jun 21, 23 | L.p. Gv 2021 GpTenPercentOwner | SELL | 19.0K | $14.97 | $284K |
| Jun 20, 23 | L.p. Gv 2021 GpTenPercentOwner | SELL | 37.4K | $15.06 | $563K |
| Jun 16, 23 | Alphabet Inc.TenPercentOwner | SELL | 6.5K | $15.02 | $98K |
| Jun 15, 23 | Alphabet Inc.TenPercentOwner | SELL | 66.7K | $14.92 | $995K |
| Jun 14, 23 | L.p. Gv 2021 GpTenPercentOwner | SELL | 29.0K | $14.87 | $431K |
| Jun 13, 23 | L.p. Gv 2021 GpTenPercentOwner | SELL | 28.1K | $15.13 | $425K |
| Jun 12, 23 | L.l.c. Gv 2019 GpTenPercentOwner | SELL | 16.0K | $14.98 | $240K |
| Jun 9, 23 | L.l.c. Gv 2019 GpTenPercentOwner | SELL | 15.7K | $14.48 | $227K |
| Jun 8, 23 | L.p. Gv 2021 GpTenPercentOwner | SELL | 5.0K | $15.74 | $79K |
| Jun 7, 23 | L.p. Gv 2021 GpTenPercentOwner | SELL | 15.0K | $16.92 | $254K |
| Jun 6, 23 | L.p. Gv 2021 GpTenPercentOwner | SELL | 30.0K | $17.02 | $510K |
| Jun 5, 23 | L.p. Gv 2021 GpTenPercentOwner | SELL | 22.4K | $16.70 | $375K |
| Jun 1, 23 | L.l.c. Gv 2021 GpTenPercentOwner | SELL | 44.8K | $14.75 | $642K |
| May 31, 23 | L.l.c. Gv 2021 GpTenPercentOwner | SELL | 16.6K | $13.65 | $227K |
| May 30, 23 | L.l.c. Gv 2019 GpTenPercentOwner | SELL | 16.8K | $13.70 | $230K |
| May 26, 23 | L.l.c. Gv 2019 GpTenPercentOwner | SELL | 12.6K | $13.70 | $173K |
| May 25, 23 | Alphabet Inc.TenPercentOwner | SELL | 23.2K | $13.38 | $310K |
| May 24, 23 | Alphabet Inc.TenPercentOwner | SELL | 7.9K | $13.66 | $108K |
| May 23, 23 | Alphabet Inc.TenPercentOwner | SELL | 43.9K | $14.74 | $648K |
| May 22, 23 | Alphabet Inc.TenPercentOwner | SELL | 87.9K | $14.13 | $1.2M |
| May 19, 23 | L.p. Gv 2021 GpTenPercentOwner | SELL | 63.2K | $13.88 | $877K |
| May 18, 23 | L.p. Gv 2021 GpTenPercentOwner | SELL | 14.0K | $13.06 | $183K |
| May 17, 23 | L.p. Gv 2021TenPercentOwner | SELL | 15.0K | $12.77 | $192K |
| May 16, 23 | L.p. Gv 2021TenPercentOwner | SELL | 50.6K | $12.59 | $638K |
| May 15, 23 | L.l.c. Gv 2019 GpTenPercentOwner | SELL | 158.0K | $12.74 | $2.0M |
| May 12, 23 | L.l.c. Gv 2019 GpTenPercentOwner | SELL | 27.3K | $12.72 | $347K |
| May 11, 23 | L.p. Gv 2019TenPercentOwner | SELL | 21.8K | $13.79 | $283K |
| May 10, 23 | L.p. Gv 2019TenPercentOwner | SELL | 87.4K | $14.03 | $1.2M |
| May 9, 23 | L.p. Gv 2021 GpTenPercentOwner | SELL | 321.2K | $14.08 | $4.5M |
| May 8, 23 | L.p. Gv 2021 GpTenPercentOwner | SELL | 100.8K | $14.13 | $1.4M |
| Oct 24, 22 | Arch Venture Partners X, LlcTenPercentOwner | BUY | 400.0K | $17.00 | $6.8M |
| Oct 24, 22 | Thomas CahillDirector | BUY | 400.0K | $17.00 | $6.8M |
| Oct 24, 22 | L.p. Gv 2021Other | BUY | 800.0K | $17.00 | $13.6M |
| Oct 24, 22 | Robert NelsenDirector,TenPercentOwner | BUY | 400.0K | $17.00 | $6.8M |
Over the past 12 months, insiders at Prime Medicine, Inc. filed 4 open-market purchases worth $34.9M and 0 sales worth $0 on PRME, which makes them net buyers over the period. The most recent Form 4 was filed on Aug 1, 25.
The largest recent open-market PRME insider purchase in our data was $20.0M by Arch Venture Partners X, L.p., TenPercentOwner, filed on Feb 15, 24.
4 different insiders at Prime Medicine, Inc. filed open-market SEC Form 4 transactions on PRME over the last 12 months.
InsiderTape plots every PRME insider buy and sell directly on the price chart and flags new SEC Form 4 filings as they arrive, with cluster detection and buy/sell pressure. The data updates daily from SEC EDGAR.
InsiderTape plots every Prime Medicine, Inc. insider buy and sell on the price chart, with buy/sell pressure, cluster detection, and alerts the moment new Form 4s hit. Start a free 7-day trial, cancel anytime.
Does it work? In five years of data, insider clusters beat the Russell 2000 about 60% of the time and the CFO's buy was the sharpest signal of all. See the backtest →
START FREE TRIAL →