ARCH Venture Fund XII, L.P. - Aug 7, 2025 SCHEDULE 13D/A Report for Prime Medicine, Inc. Common Stock, $0.00001 par value (PRME)

Filing Manager
ARCH Venture Fund XII, L.P.
Reporting Manager
Robert Nelsen
Security
Prime Medicine, Inc. Common Stock, $0.00001 par value
Symbol
PRME
Shares outstanding
179M shares
Disclosed Ownership
18.6M shares
Ownership
10.4%
Form type
SCHEDULE 13D/A
Date filed
8/11/2025, 09:48 PM
Date of event
Aug 7, 2025
SEC
View on sec.gov

Reporting Managers (12)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
ARCH Venture Fund X, L.P. 10.4% 18.5M 0 18.5M ARCH Venture Partners X, L.P. its General Partner 0001757011
ARCH Venture Fund X Overage, L.P. 10.4% 18.5M 0 18.5M ARCH Venture Partners X Overage, L.P. its General Partner 0001757017
ARCH Venture Fund XII, L.P. 10.4% 18.5M 0 18.5M ARCH Venture Partners XII, L.P. its General Partner 0001906837
ARCH Venture Partners X, L.P. 10.4% 18.5M 0 18.5M ARCH Venture Partners X, LLC its General Partner 0001782583
ARCH Venture Partners X Overage, L.P. 10.4% 18.5M 0 18.5M ARCH Venture Partners X, LLC its General Partner 0001768905
ARCH Venture Partners XII, L.P. 10.4% 18.5M 0 18.5M ARCH Venture Partners XII, LLC its General Partner 0001979765
ARCH Venture Partners X, LLC 10.4% 18.5M 0 18.5M /s/ Mark McDonnell Mark McDonnell, as Attorney-in-Fact for Robert Nelsen, Managing Director 0001769012
ARCH Venture Partners XII, LLC 10.4% 18.5M 0 18.5M /s/ Mark McDonnell Mark McDonnell, as Attorney-in-Fact for Keith Crandell, Managing Director 0001979548
Robert Nelsen 10.4% 18.6M 100K 18.5M /s/ Mark McDonnell Mark McDonnell, as Attorney-in-Fact for Robert Nelsen 0001219042
Keith Crandell 10.4% 18.5M 0 18.5M /s/ Mark McDonnell Mark McDonnell, as Attorney-in-Fact for Keith Crandell 0001219039
Kristina Burow 10.4% 18.5M 0 18.5M /s/ Mark McDonnell Mark McDonnell, as Attorney-in-Fact for Kristina Burow 0001569248
Steven Gillis 10.4% 18.5M 0 18.5M /s/ Mark McDonnell Mark McDonnell, as Attorney-in-Fact for Steven Gillis 0001229592