With four congenerating plants in Alberta, TransCanada manages, operates and markets close to 450 megawatts (MW) of electricity. Alberta Power Marketing offers wholesale power for a range of industries, including agriculture, oil and gas, commercial real estate, large scale commercial and industrial, public institutions and brokers and consultants.

The document listed below in this Section and filed as Exhibit 99.1 to this Form 6-K is hereby filed with the Securities and Exchange Commission for the purpose of being and hereby is incorporated by reference into Registration Statement on Form F-9 (Reg. No. 333-121265) under the Securities Act of 1933, as amended.

tce-elt-bio-sean-odonnell.pdf

The Tamazunchale Pipeline is a 370 km (230 miles) natural gas pipeline, comprised of two segments: Naranjos – El Sauz (130 km) and Tamazunchale - El Sauz, better known as the Tamazunchale Extension (240 km). The pipeline serves communities on the East Coast of Mexico and Central Mexico.

The Guadalajara Pipeline connects to an LNG facility located near Manzanillo on the Pacific Coast of Mexico. It has capacity to transport 500 million cubic feet of natural gas per day to a nearby power plant and transport 320 million cubic feet per day to a pipeline system near Guadalajara.

Edson Mainline Expansion Project – Commitment Tracking Table No. 1

tce-2025-q2-results-presentation.pdf