Beam Therapeutics Inc. — Director's Dealing 2021

Apr 2, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Beam Therapeutics Inc. (BEAM)
CIK: 0001745999
Period of Report: 2021-03-31

Reporting Person: Burow Kristina (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-03-31	Common Stock	J	200000	—	Disposed	3521520	Indirect
2021-03-31	Common Stock	J	200000	—	Disposed	3521519	Indirect
2021-03-31	Common Stock	J	2011	—	Acquired	6034	Direct

Footnotes

F1: Distribution of Common Stock held by a limited partnership to its partners for no consideration.

F2: The shares are held by ARCH Venture Fund IX, L.P. ("ARCH IX"). ARCH Venture Partners IX, L.P. ("GPLP"), as the sole general partner of ARCH IX, may be deemed to beneficially own the shares held by ARCH IX. ARCH Venture Partners IX, LLC ("GPLLC"), as the sole general partner of GPLP, may be deemed to beneficially own the shares held by GPLP. The Reporting Person has an interest in the GPLP and the GPLLC but does not have voting or investment control over the shares held by ARCH IX. The Reporting Person disclaims ownership of such shares, except to the extent of her pecuniary interest therein.

F3: The shares are directly held by ARCH Venture Fund IX Overage, L.P. ("ARCH Overage"). ARCH Venture Partners IX Overage, L.P. ("Overage GPLP"), as the sole general partner of ARCH Overage, may be deemed to beneficially own the shares held by ARCH Overage. GPLLC, as the sole general partner of Overage GPLP, may be deemed to beneficially own the shares held by Overage GPLP. The Reporting Person has an interest in the Overage GPLP and the GPLLC but does not have voting or investment control over the shares held by ARCH Overage. The Reporting Person disclaims ownership of such shares, except to the extent of her pecuniary interest therein.

F4: Change from indirect to direct ownership of shares previously reported as beneficially owned by the Reporting Person.