On December 4, 2024, bluebird bio reconvened its Annual Meeting, where stockholders approved a reverse stock split of common stock at a 1-for-20 ratio. The Board finalized this decision, abandoning other amendments. The Reverse Stock Split will be effective at 5:00 p.m. Eastern Time on December 12, 2024, with trading on a split-adjusted basis starting December 13, 2024, under the symbol "BLUE."No fractional shares will be issued; instead, stockholders will receive cash payments for fractional shares based on the closing price on December 12, 2024. The new CUSIP number will be 09609G 209. This move aims to adjust the stock price and improve marketability. Forward-looking statements indicate potential risks and uncertainties affecting future performance.

On December 4, 2024, bluebird bio reconvened its Annual Meeting, where stockholders approved a reverse stock split of common stock at a 1-for-20 ratio. The Board finalized this decision, abandoning other amendments. The Reverse Stock Split will be effective at 5:00 p.m. Eastern Time on December 12, 2024, with trading on a split-adjusted basis starting December 13, 2024, under the symbol "BLUE."No fractional shares will be issued; instead, stockholders will receive cash payments for fractional shares based on the closing price on December 12, 2024. The new CUSIP number will be 09609G 209. This move aims to adjust the stock price and improve marketability. Forward-looking statements indicate potential risks and uncertainties affecting future performance.