William D. Baird III - 01 Apr 2024 Form 4 Insider Report for 2seventy bio, Inc. (TSVT)

Role: President and CEO, Director
Signature: /s/ Iya Kessler, Attorney-in-Fact
Issuer symbol: TSVT
Transactions as of: 01 Apr 2024
Net transactions value: $0
Form type: 4
Filing time: 03 Apr 2024, 20:11:06 UTC
Previous filing: 09 Jan 2024
Next filing: 03 Jul 2024
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	+56,250	+22%	$0.000000	308,585	01 Apr 2024	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 Options (Right to buy)	Award	$0	+112,500		$0.000000	112,500	01 Apr 2024	Common Stock	112,500	$5.79	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 a four-year period in annual installments with the first installment vesting on March 15, 2025, subject to the Reporting Person's continued service through the applicable vesting date.
F2	This stock option vests over a four-year period at the rate of 25% on March 15, 2025, and then in 36 equal monthly installments thereafter, subject to the Reporting Person's continued service through the applicable vesting date.