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Filing Details

Accession Number:: 0001062993-24-003738
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2024-02-20 17:37:44
Reporting Period:: 2024-02-15

Accepted Time:: 2024-02-20 17:37:44
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1894562	Prime Medicine Inc.	PRME	()	4

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1219039	Keith Crandell	C/O Arch Venture Partners Ix, Llc 8755 W. Higgins Road, Suite 1025 Chicago IL 60631	No	No	Yes	No
1229592	Steven Gillis	C/O Arch Venture Partners 8755 West Higgins Road, Suite 1025 Chicago IL 60631	No	No	Yes	No
1569248	Kristina Burow	8755 W. Higgins Road,Suite 1025 Chicago IL 60631	No	No	Yes	No
1757011	Arch Venture Fund X, L.p.	8755 W. Higgins Road, Suite 1025 Chicago IL 60631	No	No	Yes	No
1757017	Arch Venture Fund X Overage, L.p.	8755 W. Higgins Road, Suite 1025 Chicago IL 60631	No	No	Yes	No
1768905	Arch Venture Partners X Overage, L.p.	8755 W. Higgins Road, Suite 1025 Chicago IL 60631	No	No	Yes	No
1769012	Arch Venture Partners X, Llc	8755 W. Higgins Road, Suite 1025 Chicago IL 60631	No	No	Yes	No
1782583	Arch Venture Partners X, L.p.	8755 W. Higgins Road, Suite 1025 Chicago IL 60631	No	No	Yes	No

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2024-02-15	3,200,000	$6.25	3,200,000	No	4	P	Indirect	By ARCH Venture Fund XII, L.P.

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	By ARCH Venture Fund XII, L.P.

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	6,128,297	Indirect	By ARCH Venture Fund X, L.P.
Common Stock	6,128,297	Indirect	By ARCH Venture Fund X Overage, L.P.

Footnotes

Represents shares held directly by ARCH Venture Fund X, L.P. ("ARCH X"). ARCH Venture Partners X, L.P. ("AVP X LP") is the sole general partner of ARCH X.
Represents shares held directly by ARCH Venture Fund X Overage, L.P. ("ARCH X Overage"). ARCH Venture Partners X Overage, L.P. ("AVP X Overage LP") is the sole general partner of ARCH X Overage.
ARCH Venture Partners X, LLC ("AVP X LLC") is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow and Steven Gillis are members of the investment committee of AVP X LLC (the "AVP X Committee Members"). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage. AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to the extent of any pecuniary interest therein, and this report shall not be deemed an admission that such shares are beneficially owned by them for Section 16 or any other purpose.
Represents shares held directly by ARCH Venture Fund XII, L.P. ("ARCH XII"). ARCH Venture Partners XII, L.P. ("AVP XII LP") is the general partner of ARCH XII. ARCH Venture Partners XII, LLC ("AVP XII LLC") is the general partner of AVP XII LP. Keith Crandell, Kristina Burow and Steven Gillis are members of the investment committee of AVP XII LLC (the "AVP XII LLC Committee Members"). Each of AVP XII LP and AVP XII LLC may be deemed to beneficially own the shares held by ARCH XII, and each of the AVP XII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XII. Each of AVP XII LP, AVP XII LLC and the AVP XII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any.