Beam Therapeutics Inc. — Director's Dealing 2021

Jul 9, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Beam Therapeutics Inc. (BEAM)
CIK: 0001745999
Period of Report: 2021-07-07

Reporting Person: Evans John M. (Director, CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-07-07	Common Stock	M	25000	$1.03	Acquired	1046525	Direct
2021-07-07	Common Stock	S	645	$100.69	Disposed	1045880	Direct
2021-07-07	Common Stock	S	2300	$101.27	Disposed	1043580	Direct
2021-07-07	Common Stock	S	100	$102.00	Disposed	1043480	Direct
2021-07-07	Common Stock	S	2864	$103.52	Disposed	1040616	Direct
2021-07-07	Common Stock	S	1336	$104.40	Disposed	1039280	Direct
2021-07-07	Common Stock	S	1800	$105.44	Disposed	1037480	Direct
2021-07-07	Common Stock	S	500	$106.48	Disposed	1036980	Direct
2021-07-07	Common Stock	S	167	$107.31	Disposed	1036813	Direct
2021-07-07	Common Stock	S	800	$108.65	Disposed	1036013	Direct
2021-07-07	Common Stock	S	4800	$109.58	Disposed	1031213	Direct
2021-07-07	Common Stock	S	3982	$110.54	Disposed	1027231	Direct
2021-07-07	Common Stock	S	3456	$111.51	Disposed	1023775	Direct
2021-07-07	Common Stock	S	2250	$112.62	Disposed	1021525	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-07-07	Stock Option (Right to Buy	$1.03	M	25000	Disposed	2028-07-13	Common Stock (25000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	223000	Indirect

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. The 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 ranging from $100.25 to $100.99, inclusive.

F4: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $101.00 to $101.85, inclusive.

F5: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $103.21 to $103.96, inclusive.

F6: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $104.00 to $104.96, inclusive.

F7: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $105.02 to $105.98, inclusive.

F8: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $106.12 to $106.77, inclusive.

F9: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $107.29 to $107.33, inclusive.

F10: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $108.32 to $108.99, inclusive.

F11: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $109.01 to $109.98, inclusive.

F12: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $110.04 to $110.99, inclusive.

F13: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $111.04 to $111.99, inclusive.

F14: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $112.00 to $112.99, inclusive.

F15: The option vests as to 25% on the first anniversary of the of the vesting commencement date, January 8, 2018, and at a rate of 2.78% each month thereafter until the option is fully vested.