Summary by Moomoo AI
On December 29, 2023, The Vanguard Group filed an amended Schedule 13G/A with the SEC, indicating a change in their holdings of bluebird bio, Inc. common stock. The filing revealed that The Vanguard Group now beneficially owns 8,775,379 shares of bluebird bio, which represents 4.61% of the company's class of common stock. This position is a result of shared voting power over 49,185 shares and sole dispositive power over 8,670,555 shares, with an additional shared dispositive power over 104,824 shares. The Vanguard Group, headquartered in Pennsylvania, is an investment adviser and reports that the securities were acquired in the ordinary course of business, not with the purpose of changing or influencing the control of bluebird bio, Inc.