X0306 4 2022-02-28 0 0001121142 Maxar Technologies Inc. MAXR 0001544511 JABLONSKY DANIEL L 1300 W. 120TH AVENUE WESTMINSTER CO 80234 1 1 0 0 President and CEO Common Stock 2022-02-28 4 A 0 62139 0.00 A 519090 D Common Stock 2022-02-28 4 F 0 28562 32.44 D 490528 D Common Stock 2022-02-28 4 F 0 7626 32.44 D 482902 D On February 28, 2022 the Compensation Committee of the Board of Directors of the Issuer determined the attainment of the relative total stockholder return and adjusted cash leverage performance goals underlying the performance stock units. Represents shares issued pursuant to settlement of performance stock units. Amount reported includes 233,220 unvested restricted stock units. Shares withheld by the issuer to satisfy tax withholding obligations upon vesting of performance stock units; not an open market transaction. Shares withheld by the issuer to satisfy tax withholding obligations upon vesting of restricted stock units; not an open market transaction. Amount reported includes 206,777 unvested restricted stock units. /s/ Patricia Lamm, attorney-in-fact for Daniel L. Jablonsky 2022-03-02