SCHEDULE 13G/A 0000905148-25-002004 0001484148 XXXXXXXX LIVE 1 Common Shares 06/30/2025 0001394832 ATS Corp /ATS 00217Y104 730 Fountain Street North Building 3 Cambridge A6 N3H 4R7 Rule 13d-1(b) Turtle Creek Asset Management Inc. Z4 7590538 0 7590538 0 7590538 N 7.8 FI ATS Corp /ATS 730 Fountain Street North, Building 3, Cambridge, Ontario, Canada, N3H 4R7 This statement on Schedule 13G is being filed by Turtle Creek Asset Management Inc. ("Turtle Creek"). Scotia Plaza, 40 King Street West, Suite 5100, Toronto, Ontario M5H 3Y2 Canada Canada N FI Investment advisor See the response(s) to Item 9 on the attached cover page. See the response(s) to Item 11 on the attached cover page. See the response(s) to Item 5 on the attached cover page. See the response(s) to Item 6 on the attached cover page. See the response(s) to Item 7 on the attached cover page. See the response(s) to Item 8 on the attached cover page. Y N Turtle Creek holds the Common Shares reported herein for the benefit of unit holders of mutual funds managed by Turtle Creek, none of whom is known to Turtle Creek to have an interest of more than 5 percent of the class. Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. By signing below I certify that, to the best of my knowledge and belief, the foreign regulatory scheme applicable to investment fund managers and portfolio managers registered with the Ontario Securities Commission is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D. Turtle Creek Asset Management Inc. /s/ Meaghan Einav 08/14/2025