X0306 4/A 2019-03-06 2019-03-06 0 0001121142 Maxar Technologies Inc. MAXR 0001463486 Scott Walter S. 1300 W. 120TH AVENUE WESTMINSTER CO 80234 0 1 0 0 EVP and CTO Common Stock 2019-03-06 4 P 0 20300 5.0569 A 90647 D Common Stock 25820 I By Trust This Form 4 is filed solely to amend the transaction code used in the previously filed Form 4 to reflect an open market purchase. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.975 to $5.10, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. Amount reported includes 16,766 unvested restricted stock units. Walter S. Scott and Diane Scott TTEES The Walter and Diane Scott Living Trust DTD 3-19-00. /s/ Patricia A. Lamm, attorney-in-fact for Walter S. Scott 2019-03-08