Certain Common Stock of Maxar Technologies Inc. are subject to a Lock-Up Agreement Ending on 17-MAY-2021. These Common Stock will be under lockup for 61 days starting from 17-MAR-2021 to 17-MAY-2021. Details: The executive officers and Chairman of the Board have agreed, subject to certain exceptions, that, without the prior written consent of Goldman Sachs & Co. LLC and Morgan Stanley & Co. LLC on behalf of the underwriters, they will not, and will not publicly disclose an intention to, during the period ending 60 days after the date of this prospectus supplement offer, sell, contract to sell, pledge, grant any option to purchase, make any short sale or otherwise transfer or dispose of, directly or indirectly, or file with the Commission a registration statement under the Securities Act relating to, any of securities that are substantially similar to shares of common stock, including but not limited to any options or warrants to purchase shares of common stock or any securities that are convertible into or exchangeable for, or that represent the right to receive, common stock or any such substantially similar securities, or publicly disclose the intention to make any offer, sale, pledge, disposition or filing.