Beam Therapeutics Inc. — Director's Dealing 2021

Jan 5, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Beam Therapeutics Inc. (BEAM)
CIK: 0001745999
Period of Report: 2021-01-04

Reporting Person: Burrell Terry-Ann (CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-01-04	Common Stock	M	25000	$13.68	Acquired	32309	Direct
2021-01-04	Common Stock	S	800	$78.05	Disposed	31509	Direct
2021-01-04	Common Stock	S	1951	$79.21	Disposed	29558	Direct
2021-01-04	Common Stock	S	2449	$80.25	Disposed	27109	Direct
2021-01-04	Common Stock	S	6509	$81.26	Disposed	20600	Direct
2021-01-04	Common Stock	S	5296	$82.44	Disposed	15304	Direct
2021-01-04	Common Stock	S	7095	$83.15	Disposed	8209	Direct
2021-01-04	Common Stock	S	900	$83.89	Disposed	7309	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-01-04	Stock Option (Right to Buy)	$13.68	M	25000	Disposed	2029-08-31	Common Stock (25000)	Direct

Footnotes

F1: The reported transactions were effected pursuant to a Rule 10b5-1 trading plan. Each price reported for transactions affected pursuant to the Rule 10b5-1 trading plan is a weighted average price. The Reporting Person undertakes to provide to 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.

F2: 25% of the shares subject to the stock option vested on the first anniversary of the of the vesting commencement date, August 20, 2019, and the remaining shares shall vest in 36 substantially equal monthly installments thereafter, subject to continued service with BEAM through such dates.

F3: These shares were sold in multiple transactions ranging from $77.65 to $78.48 inclusive.

F4: These shares were sold in multiple transactions ranging from $78.72 to $79.65 inclusive.

F5: These shares were sold in multiple transactions ranging from $79.73 to $80.72 inclusive.

F6: These shares were sold in multiple transactions ranging from $80.73 to $81.72 inclusive.

F7: These shares were sold in multiple transactions ranging from $81.80 to $82.79 inclusive.

F8: These shares were sold in multiple transactions ranging from $82.80 to $83.78 inclusive.

F9: These shares were sold in multiple transactions ranging from $83.85 to $84.01 inclusive.