Summary of accounting policies	12 Months Ended
Dec. 31, 2025
EBP 001
EBP, Accounting Policy [Line Items]
Summary of accounting policies	Summary of accounting policies Basis of Accounting The financial statements of the Plan are presented on an accrual basis of accounting in accordance with U.S. generally accepted accounting principles (GAAP). Amounts are stated in U.S. dollars unless otherwise indicated. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and changes therein, and disclosure of contingent assets and liabilities. Actual results could differ from these estimates. Investment Valuation and Income Recognition The Plan’s investments are stated at fair value. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. See Note 3 for discussion of fair value measurements. Interest income is recorded on the accrual basis and dividends are recorded on the ex-dividend date. Net appreciation (depreciation) in fair value of investments consists of: (1) the unrealized gains or losses on investments held during the year and (2) the realized gains or losses recognized on the sale of investments during the year. Realized gains and losses from security transactions are reported on the average cost basis. Purchases and sales of securities are recorded on a trade-date basis. Notes Receivable from Participants Notes receivable from participants includes the unpaid principal balance plus any accrued interest. Defaulted notes receivable from participants are recorded as a distribution based upon the terms of the plan document. Contributions Contributions from Plan participants and the matching contributions from the employer are recorded in the year in which the employee contributions are withheld from compensation. Other Revenue Certain mutual fund companies share their management fees with the Trustee. The agreement between the Trustee and the Plan includes a revenue sharing arrangement whereby the Trustee shares this revenue with the Plan. These deposits are included in the other revenue amount in the Statement of changes in net assets available for benefits. The funds can be allocated to participants. Income from revenue sharing during 2025 was $384,506, none of which was used to pay plan expenses. During 2025, $280,103 was allocated to participants. At December 31, 2025, $106,765 remained available for future allocation to participants in the revenue sharing account (2024 – nil). Other revenue during 2025 also includes $8,323 from a class action lawsuit commenced by former shareholders of Columbia Pipeline Group Inc. (CPG) related to the acquisition of CPG by TC Energy in 2016. During 2025, $498,713 of the proceeds received in 2024 from the class action lawsuit was allocated to participants. Payment of Benefits Benefits are recorded when paid.

Summary of accounting policies

12 Months Ended

Dec. 31, 2025

Basis of Accounting

The financial statements of the Plan are presented on an accrual basis of accounting in accordance with U.S. generally accepted accounting principles (GAAP). Amounts are stated in U.S. dollars unless otherwise indicated.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and changes therein, and disclosure of contingent assets and liabilities. Actual results could differ from these estimates.

Investment Valuation and Income Recognition

The Plan’s investments are stated at fair value. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. See Note 3 for discussion of fair value measurements.

Interest income is recorded on the accrual basis and dividends are recorded on the ex-dividend date.

Net appreciation (depreciation) in fair value of investments consists of: (1) the unrealized gains or losses on investments held during the year and (2) the realized gains or losses recognized on the sale of investments during the year. Realized gains and losses from security transactions are reported on the average cost basis.

Purchases and sales of securities are recorded on a trade-date basis.

Notes Receivable from Participants

Notes receivable from participants includes the unpaid principal balance plus any accrued interest. Defaulted notes receivable from participants are recorded as a distribution based upon the terms of the plan document.

Contributions

Contributions from Plan participants and the matching contributions from the employer are recorded in the year in which the employee contributions are withheld from compensation.

Other Revenue

Certain mutual fund companies share their management fees with the Trustee. The agreement between the Trustee and the Plan includes a revenue sharing arrangement whereby the Trustee shares this revenue with the Plan. These deposits are included in the other revenue amount in the Statement of changes in net assets available for benefits. The funds can be allocated to participants. Income from revenue sharing during 2025 was $384,506, none of which was used to pay plan expenses. During 2025, $280,103 was allocated to participants. At December 31, 2025, $106,765 remained available for future allocation to participants in the revenue sharing account (2024 – nil).

Other revenue during 2025 also includes $8,323 from a class action lawsuit commenced by former shareholders of Columbia Pipeline Group Inc. (CPG) related to the acquisition of CPG by TC Energy in 2016. During 2025, $498,713 of the proceeds received in 2024 from the class action lawsuit was allocated to participants.

Payment of Benefits

Benefits are recorded when paid.