Beam Therapeutics Inc. — Director's Dealing 2021

Jul 1, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Beam Therapeutics Inc. (BEAM)
CIK: 0001745999
Period of Report: 2021-06-28

Reporting Person: Ciaramella Giuseppe (President & CSO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-06-28	Common Stock	M	78580	$17.00	Acquired	123341	Direct
2021-06-28	Common Stock	S	2405	$103.83	Disposed	120936	Direct
2021-06-28	Common Stock	S	5464	$104.40	Disposed	115472	Direct
2021-06-28	Common Stock	S	7040	$105.52	Disposed	108432	Direct
2021-06-28	Common Stock	S	10444	$106.35	Disposed	97988	Direct
2021-06-28	Common Stock	S	10829	$107.30	Disposed	87159	Direct
2021-06-28	Common Stock	S	30369	$108.11	Disposed	56790	Direct
2021-06-28	Common Stock	S	9856	$109.32	Disposed	46934	Direct
2021-06-28	Common Stock	S	2173	$110.00	Disposed	44761	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-06-28	Stock Option (Right to Buy)	$17.00	M	78580	Disposed	2030-02-05	Common Stock (78580)	Direct

Footnotes

F1: The stock option exercise reported in this Form 4 was effected pursuant to a 10b5-1 trading plan.

F2: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan. Each sale price reported is a weighted average price. The Reporting Person undertakes to provide to Beam Therapeutics Inc. ("BEAM"), any security holder of BEAM or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

F3: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $103.74 to $103.97, inclusive.

F4: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.04 to $104.96, inclusive.

F5: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.01 to $105.98, inclusive.

F6: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $106.00 to $106.97, inclusive.

F7: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.00 to $107.99, inclusive.

F8: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.00 to $108.90, inclusive.

F9: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $109.00 to $109.95, inclusive.

F10: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $110.00 to $110.01, inclusive.

F11: 25% of the shares subject to the stock option shall vest on the first anniversary of the vesting commencement date, February 5, 2020, and at a rate of 2.78% each month thereafter until the option is fully vested.