DEFSEC TECHNOLOGIES — AGM Information 2024

May 16, 2024

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TSX TRUST COMPANY

VIA ELECTRONIC TRANSMISSION

May 16, 2024

TO ALL APPLICABLE EXCHANGES AND COMMISSIONS:

RE: KWESST MICRO SYSTEMS INC. Confirmation of Notice of Record and Meeting Dates

We are pleased to confirm that Notice of Record and Meeting Dates was sent to The Canadian Depository for Securities.

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----- Start of picture text ----- We advise the following with respect to the upcoming Annual General Meeting of Security Holders for thesubject issuer:1 ISIN: CA5015066049CUSIP: 5015066042 Date Fixed for the Meeting: June 28, 20243 Record Date for Notice: May 9, 20244 Record Date for Voting: May 9, 20245 Beneficial Ownership Determination Date: May 9, 20246 Classes or Series of Securities that entitle COMMON SHARESthe holder to receive Notice of the Meeting:7 Classes or Series of Securities that entitle COMMON SHARESthe holder to vote at the meeting:8 Business to be conducted at the meeting: Annual General9 Notice-and-Access:Registered Shareholders: YESBeneficial Holders: YESStratification Level: Not Applicable10 Reporting issuer is sending proxy-related materialsdirectly to Non-Objecting Beneficial Owners: YESCANCELLED----- End of picture text -----

YES YES

• 11 Issuer paying for delivery to Objecting Beneficial Owners:

Yours truly, TSX Trust Company

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