2seventy Bio, Inc.

Corporation Service Company Registered Agent	84 STATE ST, BOSTON, MA 02109
Nick Leschly CEO
William D. Baird III CFO	60 BINNEY ST, CAMBRIDGE, MA 02142
Ramy Ibrahim Md Director
Daniel S. Lynch Director	60 BINNEY ST, CAMBRIDGE, MA 02142
Nick Leschly Director
Denise Torres Director
Teresa Jurgensen Secretary
William D. Baird III TREASURER	60 BINNEY ST, CAMBRIDGE, MA 02142

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60 BINNEY ST, CAMBRIDGE, MA 02142 View Map

Form 5500

60 Binney Street, Cambridge, Ma 02142 (855) 675-7270 EIN:86-3658454 Plan Admin:Jenny Geiger

Year	Plan Name	Participants BOY/EOY	Assets BOY/EOY
2023	Plan Name2SEVENTY BIO, INC. HEALTH AND WELFARE PLAN Plan #501 Participants BOY/EOY435 / 0 Assets BOY/EOY$0 / $0	2023	2SEVENTY BIO, INC. HEALTH AND WELFARE PLAN - Plan #501	435 / 0	$0 / $0
2022	Plan Name2SEVENTY BIO, INC. 401(K) PLAN Plan #001 Participants BOY/EOY416 / 413 Assets BOY/EOY$29,315,412 / $30,277,729	2022	2SEVENTY BIO, INC. 401(K) PLAN - Plan #001	416 / 413	$29,315,412 / $30,277,729
2022	Plan Name2SEVENTY BIO, INC. HEALTH AND WELFARE PLAN Plan #501 Participants BOY/EOY425 / 0 Assets BOY/EOY$0 / $0	2022	2SEVENTY BIO, INC. HEALTH AND WELFARE PLAN - Plan #501	425 / 0	$0 / $0
2021	Plan Name2SEVENTY BIO, INC. 401(K) PLAN Plan #001 Participants BOY/EOY401 / 416 Assets BOY/EOY$0 / $29,315,412	2021	2SEVENTY BIO, INC. 401(K) PLAN - Plan #001	401 / 416	$0 / $29,315,412
2021	Plan Name2SEVENTY BIO, INC. HEALTH AND WELFARE PLAN Plan #501 Participants BOY/EOY450 / 0 Assets BOY/EOY$0 / $0	2021	2SEVENTY BIO, INC. HEALTH AND WELFARE PLAN - Plan #501	450 / 0	$0 / $0

Benefit & Retirement Plans based on Form 5500.

Related Business Names:

2seventy Bio, Inc. Registered in New York	Albany, NY	View Report
2seventy Bio, Inc. Registered in West Virginia	Cambridge, MA Charleston, WV (1 more)	View Report
2seventy Bio, Inc. Registered in New Jersey		View Report
2seventy Bio, Inc. Registered in Michigan	Lansing, MI East Lansing, MI	View Report
2seventy Bio, Inc. Registered in Ohio	Cambridge, MA Upper Arlington, OH	View Report
2seventy Bio, Inc. Registered in Connecticut	Cambridge, MA	View Report
2seventy Bio, Inc. Registered in Washington	Cambridge, MA	View Report
2seventy Bio, Inc. Registered in Pennsylvania	Pennsylvania	View Report
2seventy Bio, Inc. Registered in Oregon	Cambridge, MA	View Report
2seventy Bio, Inc. Registered in Virginia	Cambridge, MA	View Report
2seventy Bio, Inc. Registered in California	Cambridge, MA Sacramento, CA	View Report
2seventy Bio, Inc. Registered in Idaho	Cambridge, MA	View Report
2seventy Bio, Inc. Registered in Montana	Cambridge, MA Helena, MT (1 more)	View Report
2seventy Bio, Inc. Registered in North Carolina	Cambridge, MA Raleigh, NC	View Report
2seventy Bio, Inc. Registered in New Hampshire	Cambridge, MA	View Report
2seventy Bio, Inc. Registered in Colorado	Cambridge, MA Littleton, CO	View Report
2seventy Bio, Inc. Registered in Maine	Augusta, ME Cambridge, MA	View Report
2seventy Bio, Inc. Registered in Texas	Austin, TX Cambridge, MA	View Report
2seventy Bio, Inc. Registered in Wisconsin	Madison, WI	View Report

Address Match:60 Binney St Cambridge, MA

Bluebird Bio, Inc. Registered in Rhode Island	Cambridge, MA	View Report
Bluebird Bio, Inc. Registered in Ohio	Cambridge, MA Upper Arlington, OH (1 more)	View Report
2seventy Bio Securities Corporation Registered in Massachusetts	Cambridge, MA	View Report
2seventy Bio, Inc. Registered in Florida	Cambridge, MA	View Report
Bluebird Bio, Inc. Registered in Tennessee	Cambridge, MA Nashville, TN	View Report
Bluebird Bio, Inc. Registered in Oregon	Cambridge, MA	View Report
Bluebird Bio, Inc. Registered in Massachusetts	Somerville, MA Cambridge, MA	View Report
Bluebird Bio, Inc. Registered in Florida	Somerville, MA Tallahassee, FL (1 more)	View Report
Bluebird Bio, Inc. Registered in Utah	Salt Lake City, UT Somerville, MA (1 more)	View Report
Bluebird Bio, Inc. Registered in Montana	Cambridge, MA Helena, MT	View Report
Bluebird Bio, Inc. Registered in Idaho	Cambridge, MA Somerville, MA	View Report
Bluebird Bio, Inc. Registered in Georgia	Cambridge, MA Peachtree Corners, GA	View Report
Bluebird Bio, Inc. Registered in Alabama	Cambridge, MA Montgomery, AL	View Report
Bluebird Bio, Inc. Registered in Maine	Augusta, ME Cambridge, MA	View Report
Bluebird Bio, Inc. Registered in Arkansas	Cambridge, MA Spring St Little Rock, AR	View Report
Bluebird Bio, Inc. Registered in New Hampshire	Somerville, MA Cambridge, MA	View Report
Bluebird Bio, Inc. Registered in Texas	Cambridge, MA	View Report

Person/City Match:William D Baird III - Cambridge, MA

Bluebird Bio, Inc. Registered in Connecticut	Somerville, MA Cambridge, MA	View Report
Bluebird Bio, Inc. Registered in Washington	Somerville, MA Cambridge, MA	View Report
Bluebird Bio, Inc. Registered in North Carolina	Raleigh, NC Somerville, MA (1 more)	View Report
Bluebird Bio, Inc. Registered in Missouri	Somerville, MA Cambridge, MA (1 more)	View Report

Person/City Match:Daniel S Lynch - Cambridge, MA

Bluebird Bio, Inc. Registered in West Virginia	Charleston, WV Somerville, MA (1 more)	View Report
Blueprint Medicines Corporation Registered in Michigan	New York, MI Plymouth, MI (1 more)	View Report
Bluebird Bio, Inc. Registered in Vermont	Somerville, MA Cambridge, MA	View Report
Blueprint Medicines Corporation Registered in Connecticut	Cambridge, MA	View Report
Blueprint Medicines Corporation Registered in Massachusetts	Cambridge, MA	View Report
Blueprint Medicines Corporation Registered in Vermont	Cambridge, MA Jeffersonville, VT	View Report
Blueprint Medicines Corporation Registered in Nevada	Cambridge, MA	View Report
Blueprint Medicines Corporation Registered in New Hampshire	Cambridge, MA	View Report
Blueprint Medicines Corporation Registered in Missouri	Cambridge, MA	View Report
Blueprint Medicines Corporation Registered in Mississippi	Cambridge, MA	View Report

The following government agencies have contributed data:

Secretary of the Commonwealth of Massachusetts U.S. Department of Labor

Company Summary