ATS CORPORATION

Common Shares

Debt Securities

Subscription Receipts

Warrants

Units

ATS Corporation (the "Corporation", "ATS", "us", "we" or "our") may offer and issue, from time to time, (i) common shares in the capital of the Corporation ("Common Shares"), (ii) bonds, debentures, notes or other evidences of indebtedness of any kind, nature or description (collectively, "Debt Securities"), (iii) subscription receipts ("Subscription Receipts"), (iv) warrants to purchase securities ("Warrants"), or (v) units comprising any combination of the foregoing securities ("Units"). The Common Shares, Debt Securities, Subscription Receipts, Warrants and Units (collectively, the "Securities") offered hereby may be offered separately or together, in separate series, in amounts, at prices and on terms to be determined based on market conditions at the time of sale and set forth in one or more prospectus supplements (each, a "Prospectus Supplement"). In addition, Securities may be offered and issued in consideration for the acquisition of other businesses, assets, or securities by us or one of our subsidiaries. The consideration for any such acquisition may consist of any of the Securities separately, a combination of Securities or any combination of, among other things, Securities, cash, and assumption of liabilities. The Corporation may sell the Securities at any time and from time to time during the 37-month period that this short form base shelf prospectus (the "Prospectus"), including any amendments thereto, remains valid, including by way of transactions that are deemed to be "at-the-market distributions" as defined in NI 44-102. One or more selling securityholders may also offer and sell the Securities under this Prospectus. The term "offering" refers in this Prospectus to Securities we may offer or issue, or those Securities that one or more securityholders may sell. See "Selling Securityholders".