January 5, 2024 · Form 4 insider transaction
Colvin Richard A sold 597 shares of bluebird bio, Inc. at $1.42 per share, a transaction worth $844.76. The trade was recorded as open-market sale and disclosed on an SEC Form 4, filed 4 days after the transaction.
Shares were sold to cover tax withholding obligations incurred in connection with the vesting of Restricted Stock Units.