Luca Issi, Ph.D. | Analyst | bluebird bio, Inc.

Media Contacts

Jess Rowlands

Head of Corporate Communications

(857) 299-6103

jess.rowlands@bluebirdbio.com

Investor Contacts

Courtney O’Leary

Investor Relations

(978) 621-7347

coleary@bluebirdbio.com

Luca Issi, Ph.D.

RBC Capital Markets