TransAlta Corporation (TAC:NYSE) closed at $12.22 on October 23, 2026, down 2.32% on the day. The stock trades 31.7% below its 52-week high of $17.88 and 7.4% above its 52-week low of $11.38. Over the past year, it lost 29.2%. TransAlta Corporation is part of the Public Utilities sector (Electric Utilities: Central).
In 252 trading sessions since October 23, 2025, TAC closed higher on 119 days (47%). Its best day was June 11, 2026 (+8.00%) and its worst was November 6, 2025 (-11.44%). The stock moved 10% or more in a single session 2 times.
TransAlta Corporation operates as non-regulated electricity generation and energy marketing company in Canada, the United States, and Western Australia. The company operates through eight segments: Canadian Coal, U.S. Coal, Canadian Gas, Australian Gas, Wind and Solar, Hydro, Energy Marketing, and Corporate. It generates and markets electricity through various generation facilities. The company has an aggregate net ownership interest of approximately 8,716 megawatts of generating capacity. TransAlta Corporation was founded in 1909 and is headquartered in Calgary, Canada.
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Based on end-of-day data. For information only, not investment advice.