SCHEDULE 13G

NORTH AMERICAN CONSTRUCTION

Common Shares · CUSIP: 656811106

Event date: 2025-05-31

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Bank of Montreal

  Shares: 3,293,250 · Class: 10.73%

• BANK OF MONTREAL HOLDING INC.

  Shares: 3,293,250 · Class: 10.73%

• BMO NESBITT BURNS INC. WEALTH MANAGEMENT

  Shares: 2,293,293 · Class: 7.47%

• BMO ASSET MANAGEMENT INC.

  Shares: 1,912,019 · Class: 6.23%

• BMO NESBITT BURNS INC.

  Shares: 999,958 · Class: 3.25%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.