Summary
Updated Aug 31, 2026
David R. Liu is 10% Owner of Prime Medicine, Inc. (PRME). 1 SEC Form 4 filing on record, dated 1 July 2025. Most recent open-market trade: bought $53K of PRME on 1 July 2025. Lifetime open-market purchases: $53K.
Recent Transactions
1Every recent SEC Form 4 transaction David R. Liu has reported, most recent first.
Trading Pattern
InsiderAlpha's records for David R. Liu go back to 2025: 1 primary Form 4 filing, an average of 0.5 per year. The typical open-market purchase is $53K (1 buy totaling $53K). The largest single buy on record is $53K of PRME in 2025. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who have reported open-market trades at the same companies as David R. Liu. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- ARCH Venture Partners X, LLC - $10.00M of PRME open-market activity on record
- Robert Nelsen - $10.00M of PRME open-market activity on record
- ARCH Venture Partners XII, LLC - $10.00M of PRME open-market activity on record
- GV 2021 GP, L.L.C. - $4.95M of PRME open-market activity on record
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is David R. Liu?
David R. Liu is a corporate insider, tracked as 10% Owner of Prime Medicine, Inc. (PRME). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did David R. Liu last file a Form 4?
The only primary Form 4 on record is dated 1 July 2025.
Has David R. Liu been buying or selling stock?
Recorded transactions: 1 open-market purchase ($53K) and 0 open-market sales across all tracked filings.
Where can I see all of David R. Liu's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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