On March 11, 2026, MDA Space Ltd. has filed a prospectus supplement for a concurrent Canadian and U.S. offering of 9,836,065 common shares at US$30.50 per share, for gross proceeds of approximately US$300.0 million (about C$407.6 million). The shares are offered under a Canadian short form base shelf prospectus and a U.S. Form F-10 registration statement, with conditional TSX listing approval and an application to list on the NYSE under the symbol "MDA." The Canadian underwriters are J.P. Morgan Securities Canada Inc., RBC Dominion Securities Inc., BMO Nesbitt Burns Inc., Jefferies Securities, Inc., Scotia Capital Inc. and Canaccord Genuity Corp. The U.S. underwriters are J.P. Morgan Securities LLC, RBC Capital Markets, LLC, BMO Capital Markets Corp., Deutsche Bank Securities Inc., Jefferies LLC, Scotia Capital (USA) Inc. and Canaccord Genuity LLC, pursuant to an underwriting agreement dated March 11, 2026. After a 4.75% underwriters' fee and estimated expenses of US$2.0 million (about C$2.7 million), net proceeds are expected to total approximately US$283.7 million (about C$385.5 million). If the 15% over-allotment option for 1,475,409 additional shares is fully exercised, gross proceeds would reach approximately US$345.0 million (about C$468.8 million). MDA plans to use proceeds for growth strategies, potential acquisitions, general corporate purposes and partial repayment of its syndicated credit facility.

Goodmans LLP and Skadden, Arps, Slate, Meagher & Flom LLP serve as legal counsel for MDA, while Osler, Hoskin & Harcourt LLP and Simpson Thacher & Bartlett LLP advise the underwriters.