SCHEDULE 13G/A 0000945621-20-000333 0001538449 XXXXXXXX LIVE 8 Common Shares 03/31/2025 0001368519 North American Construction Group Ltd. 656811106 27287-100 Avenue Acheson A0 T7X 6H8 Rule 13d-1(b) Mawer Investment Management Ltd. A0 1890536 0 2678487 0 2678487 N 8.72 IA Based upon 30,701,680 Common Shares of North American Construction Group Ltd. (the "Issuer") outstanding as of March 14, 2025, as reported in the Issuer's 6-K (Annual Report) filed with the Securities and Exchange Commission on March 21, 2025. North American Construction Group Ltd. 27287-100 Avenue, Acheson, Alberta, Canada, T7X 6H8 Mawer Investment Management Ltd. 600, 517 - 10th Avenue SW Calgary Alberta, Canada T2R 0A8 Canada N IA 2,678,487 8.72 1,890,536 0 2,678,487 0 Y Y 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. Mawer Investment Management Ltd. /s/ Samir Taghiyev 05/07/2025