Lin Wei - 07 Mar 2023 Form 4 Insider Report for 2seventy bio, Inc. (TSVT)

Role: Director
Signature: /s/ Teresa Jurgensen, Attorney-in-Fact
Issuer symbol: TSVT
Transactions as of: 07 Mar 2023
Net transactions value: $0
Form type: 4
Filing time: 09 Mar 2023, 20:48:00 UTC
Previous filing: 03 Feb 2023
Next filing: 15 Jun 2023
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TSVT	Common Stock	Award	$0	+16,600		$0.000000	16,600	07 Mar 2023	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	TSVT	Stock Option (Right to buy)	Award	$0	+33,400		$0.000000	33,400	07 Mar 2023	Common Stock	33,400	$10.91	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This restricted stock unit award vests ratably over three years in annual installments with the first installment vesting on March 7, 2024, subject to the Reporting Person's continued service through the applicable vesting date.
F2	This stock option vests ratably over three years in annual installments with the first installment vesting on March 7, 2024, subject to the Reporting Person's continued service through the applicable vesting date.