Prime Medicine Inc. Insider Trading

PRME

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Last 12 months

No open-market buying or selling by insiders.

The last open-market buy by an executive or director was in Aug 2025.

Net open-market

0 buys · 0 sales

Under a 10b5-1 plan

—

no sales

Insiders who bought / sold

0 / 0

executives and directors

Last open-market buy

Aug 2025

Aug 1, 2025

Get an email when PRME's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Aug 1, 2025	Alphabet Inc. Large holder	Bought	1,500,000	$3.30	$4.95M	85%	Form 4
Aug 1, 2025	Robert Nelsen Director	Bought	3,030,300	$3.30	$10M	20%	Form 4
Aug 1, 2025	Arch Venture Fund Xii, L.p. Large holder	Bought	3,030,300	$3.30	$10M	20%	Form 4
Aug 1, 2025	Steven Gillis Large holder	Bought	3,030,300	$3.30	$10M	20%	Form 4
Jun 30, 2025	David R. Liu Large holder	Bought	21,000	$2.52	53K	0.1%	Form 4
Jun 23, 2025	David R. Liu Large holder	Bought	21,000	$2.16	45K	0.1%	Form 4
Jun 16, 2025	David R. Liu Large holder	Bought	21,000	$1.49	31K	0.1%	Form 4
Jun 11, 2025	David R. Liu Large holder	Bought	21,000	$1.60	34K	0.1%	Form 4
May 21, 2025	Ann L. Lee Chief Technical Officer	Bought	100,000	$1.13	113K	New	Form 4
May 21, 2025	Allan Reine Chief Executive Officer	Bought	125,000	$1.18	148K	New	Form 4
May 20, 2025	Richard Brudnick Chief Business Officer	Bought	20,000	$1.19	24K	New	Form 4

Aug 1, 2025
Alphabet Inc.
Large holder · bought 1,500,000 at $3.30
$4.95M
85% of stake
Aug 1, 2025
Robert Nelsen
Director · bought 3,030,300 at $3.30
$10M
20% of stake
Aug 1, 2025
Arch Venture Fund Xii, L.p.
Large holder · bought 3,030,300 at $3.30
$10M
20% of stake
Aug 1, 2025
Steven Gillis
Large holder · bought 3,030,300 at $3.30
$10M
20% of stake
Jun 30, 2025
David R. Liu
Large holder · bought 21,000 at $2.52
53K
0.1% of stake
Jun 23, 2025
David R. Liu
Large holder · bought 21,000 at $2.16
45K
0.1% of stake
Jun 16, 2025
David R. Liu
Large holder · bought 21,000 at $1.49
31K
0.1% of stake
Jun 11, 2025
David R. Liu
Large holder · bought 21,000 at $1.60
34K
0.1% of stake
May 21, 2025
Ann L. Lee
Chief Technical Officer · bought 100,000 at $1.13
113K
New position
May 21, 2025
Allan Reine
Chief Executive Officer · bought 125,000 at $1.18
148K
New position
May 20, 2025
Richard Brudnick
Chief Business Officer · bought 20,000 at $1.19
24K
New position

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch PRME, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Held by ETFs

PRME is in 22 US ETFs. The largest of them, with PRME's weight in each:

Spot a number that looks wrong? Check it in PRME's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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