|Issuer:||BLUEBIRD BIO, INC. (BLUE)|
|Original Submission Date:|
C/O BLUEBIRD BIO, INC.
60 BINNEY STREET CAMBRIDGE, MA 02142
|Title of Security||Transaction Date||2a. Deemed Execution Date||Transaction Code||Shares||Acquired or Disposed||Price per share||5. Amount of Securities Beneficially Owned Following Reported Transaction||6. Ownership Form Direct or Indirect||Nature of Indirect Ownership|
|Title of Derivative Security||Conversion or Exercise Price of Derivative Security||Transaction Date||Deemed Execution Date||Transaction Code||Number of Derivative Securities Acquired (A) or Disposed of (D)||Date Exercisable||Expiration Date||Title and Amount of Securities Underlying Derivative Security||Price of Derivative Security||Number of derivative Securities Beneficially Owned Following Reported Transaction(s)||Ownership Form: Direct (D) or Indirect (I)||Nature of Indirect Beneficial Ownership|
|f1||this transaction represents a gift of securities by the reporting person's indirectly owned revocable trust account to the nick leschly irrevocable gst trust of 2019 (the "irrevocable trust") designed for the benefit of his spouse and his daughters. the reporting person's brother is the trustee of the irrevocable trust. the reporting person disclaims beneficial ownership of the irrevocable trust.|