MDA Space — Proxy Solicitation & Information Statement 2023

Apr 21, 2023

TMX THE FUTURE IS YOURS TO SEE.

TSX TRUST COMPANY

VIA ELECTRONIC TRANSMISSION

April 21, 2023

TO ALL APPLICABLE EXCHANGES AND COMMISSIONS:

RE: MDA LTD.

We are pleased to confirm that copies of the following proxy-related materials were mailed on April 20, 2023 to the Registered Securityholders and to the Non-Objecting Beneficial Owners ("NOBO"):

1. Proxy with Request for Financial Statements - Registered Securityholders
2. Voting Instruction Form with Request for Financial Statements - NOBOs
3. Notice of Meeting Combined with Information Circular
4. Virtual Meeting Guide Form
5. Proxy Return Envelope

Yours truly,

TSX Trust Company

"Rebecca Prentice"

Relationship Manager

rebecca.prentice@tmx.com

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