UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934 (Amendment No.           )

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☐	Preliminary Proxy Statement
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☐	Definitive Proxy Statement
☒	Definitive Additional Materials
☐	Soliciting Material under §240.14a‑12

Maxar Technologies Inc.
(Name of Registrant as Specified In Its Charter)
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)
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MMMMMMMMMMMM + C 1234567890 000004 ENDORSEMENT_LINE______________ SACKPACK_____________ MR A SAMPLE DESIGNATION (IF ANY) ADD 1 ADD 2 ADD 3 ADD 4 ADD 5 ADD 6 Online Go to www.envisionreports.com/MAXR or scan the QR code — login details are located in the shaded bar below. Votes submitted electronically must be received by 11:59 p.m., Mountain Time, on May 12, 2020. Important Notice Regarding the Availability of Proxy Materials for the Maxar Technologies Inc. 2020 Annual Stockholder Meeting to be Held on May 13, 2020 Under Securities and Exchange Commission rules, you are receiving this notice that the proxy materials for the annual stockholders’ meeting are available on the Internet. Follow the instructions below to view the materials and vote online or request a copy of the proxy materials be sent to you. The items to be voted on and location of the annual meeting are on the reverse side. Your vote is important! This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting. The 2020 proxy statement and 2019 Annual Report to stockholders are available at: www.envisionreports.com/MAXR Easy Online Access — View your proxy materials and vote. Step 1: Step 2: Step 3: Step 4: Step 5: Go to www.envisionreports.com/MAXR. Click on Cast Your Vote or Request Materials. Follow the instructions on the screen to log in. Make your selections as instructed on each screen for your delivery preferences. Vote your shares. When you go online, you can also help the environment by consenting to receive electronic delivery of future materials. Obtaining a Copy of the Proxy Materials – If you want to receive a copy of the proxy materials, you must request one. There is no charge to you for requesting a copy. Please make your request as instructed on the reverse side on or before May 1, 2020 to facilitate timely delivery. + 2 N O T C O Y 037SCC MMMMMMMMM 2020 Annual Stockholder Meeting Notice1234 5678 9012 345

Maxar Technologies Inc.’s Annual Meeting of Stockholders will be held on May 13, 2020 at the Company’s Corporate Headquarters, 1300 W. 120th Avenue, Westminster, CO 80234, at 2:00 p.m., Mountain Time. Proposals to be voted on at the meeting are listed below along with the Board of Directors’ recommendations. The Board of Directors recommends a vote FOR all the nominees listed and FOR Proposals 2, 3 and 4. 1. Election of Directors: 01 - Howell M. Estes III 02 - Nick S. Cyprus 03 - Roxanne J. Decyk 04 - Joanne O. Isham 05 - Daniel L. Jablonsky 06 - C. Robert Kehler 07 - L. Roger Mason, Jr. 08 - Eric J. Zahler 09 - Eddy Zervigon 2. 3. 4. To approve, on a non-binding advisory basis, the executive compensation of the Company’s named executive officers. To approve an Amendment to the Maxar Technologies Inc. 2019 Incentive Award Plan. To ratify the appointment of KPMG LLP as the Company's independent registered public accounting firm for the year ending December 31, 2020. Note: Stockholders will also transact such other business as may properly come before the meeting and at any adjournments or postponements of the meeting. PLEASE NOTE – YOU CANNOT VOTE BY RETURNING THIS NOTICE. To vote your shares you must go to www.envisionreports.com/MAXR or request a paper copy of the proxy materials to receive a proxy card. If you wish to attend and vote at the meeting, please bring this notice with you. Here’s how to order a copy of the proxy materials and select delivery preferences: Current and future delivery requests can be submitted using the options below. If you request an email copy, you will receive an email with a link to the current meeting materials. PLEASE NOTE: You must use the number in the shaded bar on the reverse side when requesting a copy of the proxy materials. Internet – Go to www.envisionreports.com/MAXR. Click Cast Your Vote or Request Materials. — — — Phone – Call us free of charge at 1-866-641-4276. Email – Send an email to investorvote@computershare.com with “Proxy Materials Maxar Technologies Inc.” in the subject line. Include your full name and address, plus the number located in the shaded bar on the reverse side, and state that you want a paper copy of the meeting materials. To facilitate timely delivery, all requests for a paper copy of proxy materials must be received by May 1, 2020. 2020 Annual Stockholder Meeting Notice