Certain Stock Options of Caribou Biosciences, Inc. are subject to a Lock-Up Agreement Ending on 12-SEP-2023. These Stock Options will be under lockup for 61 days starting from 13-JUL-2023 to 12-SEP-2023.

Details:
Executive officers, and directors have agreed not to sell or transfer any common stock or securities convertible into, exchangeable for, exercisable for, or repayable with common stock, for 60 days after the date of this prospectus supplement without first obtaining the written consent of the representatives.