Certain Stock Option of ViacomCBS Inc. are subject to a Lock-Up Agreement Ending on 22-JUN-2021. These Stock Option will be under lockup for 91 days starting from 23-MAR-2021 to 22-JUN-2021. Details: Directors, executive officers and National Amusements, Inc., controlling stockholder, have entered into lock-up agreements with the underwriters prior to the commencement of this offering pursuant to which each of these persons, with limited exceptions, for a period of 45 days after the date of this prospectus supplement, may not, without the prior written consent of Morgan Stanley & Co. LLC, offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, lend or otherwise transfer or dispose of, directly or indirectly, any shares of Class B common stock or any securities convertible into or exercisable or exchangeable for Class B common stock, or enter into any swap, hedge or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of Class B common stock or any securities convertible into or exercisable or exchangeable for Class B common stock, whether in any case such transaction is to be settled by delivery of Class B common stock or such other securities, in cash, or otherwise.