Victoria Eatwell - Jan 6, 2025 Form 4 Insider Report for 2seventy bio, Inc. (TSVT)

Role: Chief Financial Officer
Signature: /s/ Iya Kessler, Attorney-in-Fact
Stock symbol: TSVT
Transactions as of: Jan 6, 2025
Transactions value $: $0
Form type: 4
Date filed: 1/8/2025, 06:51 PM
Previous filing: Jan 7, 2025

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TSVT	Common Stock	Award	$0	+108K	+31.86%	$0.00	447K	Jan 6, 2025	Direct	F1

Showing 1 to 1 of 1 entries

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	+72K		$0.00	72K	Jan 6, 2025	Common Stock	72K	$2.64	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 January 2, 2026, 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 January 2, 2026, and then in 36 equal monthly installments thereafter, subject to the Reporting Person's continued service through the applicable vesting date.