PRME insider buying
2 cluster buysPrime Medicine, Inc. · Healthcare
When two or more insiders at Prime Medicine, Inc. buy PRME on the open market around the same time, that clustered conviction is one of the highest-signal patterns in SEC filing data. Below is every cluster we've detected in PRME plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.
Detected clusters
- Aug 1 – Aug 1, 2025Detected Aug 1, 20254 insidersTotal bought$34.9MMarket cap$702.6M
- May 21 – May 21, 2025Detected May 21, 2025High conviction2 insidersTotal bought$260.5KMarket cap$702.6M
All notable open-market buys in PRME
Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.
| Date | Insider | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Aug 1, 2025 | GILLIS STEVENcluster 10% Owner | 3,030,300 | $3.30 | $10.0M | SEC ↗ |
| Aug 1, 2025 | NELSEN ROBERTcluster Director, 10% Owner | 3,030,300 | $3.30 | $10.0M | SEC ↗ |
| Aug 1, 2025 | ARCH Venture Fund XII, L.P.cluster 10% Owner | 3,030,300 | $3.30 | $10.0M | SEC ↗ |
| Aug 1, 2025 | Alphabet Inc.cluster 10% Owner | 1,500,000 | $3.30 | $5.0M | SEC ↗ |
| Jun 30, 2025 | 10% Owner | 21,000 | $2.52 | $52.9K | SEC ↗ |
| Jun 23, 2025 | 10% Owner | 21,000 | $2.16 | $45.4K | SEC ↗ |
| Jun 16, 2025 | 10% Owner | 21,000 | $1.49 | $31.3K | SEC ↗ |
| Jun 11, 2025 | 10% Owner | 21,000 | $1.60 | $33.6K | SEC ↗ |
| May 21, 2025 | Reine Allancluster Director, Chief Executive Officer | 125,000 | $1.18 | $147.5K | SEC ↗ |
| May 21, 2025 | LEE ANN L.cluster Chief Technical Officer | 100,000 | $1.13 | $113.0K | SEC ↗ |
| May 20, 2025 | Chief Business Officer | 20,000 | $1.19 | $23.8K | SEC ↗ |
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PRME insider buying — FAQ
- Are insiders buying PRME stock?
- Yes — 8 distinct insiders have bought PRME (Prime Medicine, Inc.) on the open market, including 2 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was Aug 5, 2025.
- How much PRME stock have insiders bought?
- Insiders have bought a combined $35.4M of PRME across 11 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in PRME?
- A cluster buy is two or more distinct Prime Medicine, Inc. insiders — officers, directors, or 10% owners — each buying PRME on the open market within a rolling window. PRME has 2 detected cluster buys to date.
- Where does this PRME insider trading data come from?
- Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.
How we track insider buying in PRME
We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy PRME within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Every figure on this page traces back to an official filing; open any row to jump straight to the source document. What counts as a cluster buy?
This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding PRME.