COLUMBIA CASCADE COMPANY

s, labor, and other operating expenses (excluding depreciation) 5,350.7 5,393.6 Depreciation and amortization 158.2 144.1 Selling and distribution expenses 616.3 594.9 General and administrative expenses 99.7 102.3 Other (income) expense, net (3.6) (0.7) 6,221.3 6,234.3 Income from operations $ 183.3 $ 490.0 (percentage of sales) Sales 100.0 % 100.0 % Costs and expenses Materials, labor, and other operating expenses (excluding depreciation) 83.5 % 80.2 % Depreciation and amortization 2.5 2.1 Selling and distribution expenses 9.6 8.8 General and administrative expenses 1.6 1.5 Other (income) expense, net (0.1) — 97.1 % 92.7 % Income from operations 2.9 % 7.3 % 36 Table of Contents Sales Volumes and Prices Set forth below are historical U.S. housing starts data, sales mix and gross margin in

ns. Participants who have attained age 50 before the end of the Plan year are eligible to make catch-up contributions. Employer match – The Company may elect to make discretionary matching contributions to the Plan. Matching contributions are made each pay period. The Company matched 50 % of employee contributions, up to 8 % of eligible compensation deferred to the Plan for the year ended December 31, 2025. Employer profit sharing – The Company may elect to make discretionary profit sharing contributions to the Plan. Participants must complete at least 1,000 hours of service during the Plan year and be employed as of the last day of the Plan year, to be eligible to receive any profit sharing contributions. Profit sharing contributions are allocated to participants in the same proportion as

G PLAN NOTES TO FINANCIAL STATEMENTS AS OF DECEMBER 31, 2025 AND 2024, AND FOR THE YEAR ENDED DECEMBER 31, 2025 Note 1 – Description of Plan (continued) Vesting – Participants are fully vested at all times in that portion of their accounts attributable to their own contributions and earnings or losses thereon. Vesting in Company contributions is based on years of service pursuant to the following vesting schedule. Participants who were part of acquired plans may have specific vesting schedules in accordance with those plans. Years of service Percentage Less than 1 year — % 1 year but less than 2 20 % 2 years but less than 3 40 % 3 years but less than 4 60 % 4 years but less than 5 80 % 5 years or more 100 % Notes receivable from participants – Participants may borrow from their accounts a

signated as independent contractors, are eligible to participate in the 401(k) portion of the Plan upon reaching age 18. Once the eligibility criteria have been met, employees are automatically enrolled into the Plan at a deferral rate of 6 % of their eligible compensation, unless they choose to opt-out. Employees enter the Plan on scheduled enrollment dates following their completion of the eligibility requirements. Contributions – Contributions are subject to regulatory limitations. Employee deferrals – Participants may elect to contribute up to 80 % of eligible compensation. In addition, participants may make voluntary Roth after-tax contributions or voluntary non-deductible after-tax contributions to the Plan. Participants may also roll over eligible amounts from other qualified plans.

37,765 Rollovers 9,637 Total contributions 60,844 Total additions 180,848 DEDUCTIONS FROM NET ASSETS ATTRIBUTED TO Benefits paid to participants 91,654 Corrective distributions 26 Administrative expenses 607 Total deductions 92,287 CHANGE IN NET ASSETS 88,561 NET ASSETS AVAILABLE FOR BENEFITS Beginning of year 761,328 End of year $ 849,889 See accompanying notes. 4 COLUMBIA BANK 401(k) AND PROFIT SHARING PLAN NOTES TO FINANCIAL STATEMENTS AS OF DECEMBER 31, 2025 AND 2024, AND FOR THE YEAR ENDED DECEMBER 31, 2025 Note 1 – Description of Plan The following description of the Columbia Bank 401(k) and Profit Sharing Plan (the "Plan") provides only general information. Participants should refer to the Plan Agreement, as amended, for a more complete description of Plan provisions. Effective Sept