Document and Entity Information
Document and Entity Information Document | Jul. 26, 2024 | Mar. 05, 2024 |
Cover [Abstract] | ||
Document Type | 8-K | |
Document Period End Date | Jul. 26, 2024 | |
Entity Registrant Name | 2seventy bio, Inc. | |
Entity Incorporation, State or Country Code | DE | |
Entity File Number | 001-40791 | |
Entity Tax Identification Number | 86-3658454 | |
Entity Address, Address Line One | 60 Binney Street, | |
Entity Address, City or Town | Cambridge | |
Entity Address, State or Province | MA | |
Entity Address, Postal Zip Code | 02142 | |
City Area Code | 617 | |
Local Phone Number | 675-7270 | |
Written Communications | false | |
Soliciting Material | false | |
Pre-commencement Tender Offer | false | |
Pre-commencement Issuer Tender Offer | false | |
Title of 12(b) Security | Common Stock, par value $0.0001 per share | |
Trading Symbol | TSVT | |
Security Exchange Name | NASDAQ | |
Entity Emerging Growth Company | true | |
Entity Ex Transition Period | false | |
Entity Central Index Key | 0001860782 | |
Amendment Flag | false |