Certain Common Stock of Sotera Health Company are subject to a Lock-Up Agreement Ending on 16-JUN-2021. These Common Stock will be under lockup for 91 days starting from 17-MAR-2021 to 16-JUN-2021. Details: Each of the officers, directors and the selling stockholders have agreed, subject to certain exceptions, with the underwriters not to dispose of or hedge any of the shares of common stock or securities convertible into or exchangeable for shares of common stock during the period from the date of this prospectus continuing through the date 90 days after the date of this prospectus.