Certain Common Stock of CubeSmart are subject to a Lock-Up Agreement Ending on 31-DEC-2021. These Common Stock will be under lockup for 45 days starting from 16-NOV-2021 to 31-DEC-2021. Details: The company's directors and our executive officers have entered into lock-up agreements with the underwriters. Under these agreements, subject to exceptions, their directors and executive officers may not, directly or indirectly, (i) issue, offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option or right or otherwise transfer or dispose of any common shares or securities convertible into or exchangeable for common shares, or file or cause to be filed any registration statement under the Securities Act with respect to any of the foregoing or (ii) enter into any swap or any other agreement, arrangement or any transaction that transfers, in whole or in part, directly or indirectly, the economic consequence of ownership of common shares or securities convertible into or exchangeable for common shares, whether any such swap or transaction described in clause (i) or (ii) above is to be settled by delivery of common shares or such other securities, in cash or otherwise, without the prior written consent of the representatives, for a period of 45 days from the date of this prospectus supplement. This consent may be given at any time without public notice.