ATS Announces Pricing of Increased Offering of $400 Million Senior Unsecured Notes Page 1

ATS Corporation (TSX and NYSE: ATS) (“ATS” or the “Company”) today announced that it has entered into an agreement to acquire, pursuant to a private placement (the “To offer”), an aggregate principal amount of C$400 million of senior unsecured notes due 2032 (the “Notes”), which aggregate principal amount of Notes was increased from the original deal size of C$300 million. The Notes are being issued at a price of C$1,000 per C$1,000 principal amount of Notes. The Notes will bear interest at a rate of 6.50% per annum, payable in cash in equal payments semi-annually in arrears on February 21 and August 21 of each year, commencing on February 21, 2025. The Notes are being issued pursuant to a deed to be entered into between the Company and Computershare Trust Company of Canada, as trustee.

ATS intends to use the net proceeds from the offering to pay the outstanding amounts due under the revolving credit facility available under its senior syndicated credit facility.