Avoid the stress of overpaying for a stock or missing an opportunity by using the right tools and insights to evaluate TransAlta Corporation before investing.

In this article, we go over a few key elements for understanding TransAlta Corporation’s stock price such as:

• TransAlta Corporation’s current stock price and volume
• Why TransAlta Corporation’s stock price changed recently
• Upgrades and downgrades for TAC from analysts
• TAC’s stock price momentum as measured by its relative strength

About TransAlta Corporation (TAC)

Before we jump into TransAlta Corporation’s stock price, history, target price and what caused it to recently dip, let’s take a look at some background.

TransAlta Corporation engages in the development, production, and sale of electric energy. It operates through Hydro, Wind and Solar, Gas, Energy Transition, and Energy Marketing segments. The Hydro segment holds interest of approximately 922 megawatts (MW) of owned hydroelectric generating capacity located in Alberta, British Columbia, and Ontario. The Wind and Solar segment has a net ownership interest of approximately 2,057 MW of owned wind and solar electrical-generating capacity, as well as battery storage facilities located in Alberta, Ontario, New Brunswick, and Québec in Canada; the states of Massachusetts, Minnesota, New Hampshire, North Carolina, Pennsylvania, Washington, and Wyoming in the United States; and the state of Western Australia. The Gas segment has a net ownership interest of approximately 2,775 MW of owned gas electrical-generating capacity, and facilities located in Alberta, Ontario, Michigan, and the state of Western Australia. The Energy Transition segment has a net ownership interest of approximately 671 MW of owned coal electrical-generating capacity, as well as operates the Skookumchuck hydro facility in Centralia; and engages in the highvale mine and the mine reclamation activities. The Energy Marketing segment is involved in the trading of power, natural gas, and environmental products. It serves customers in various industry segments, including commercial real estate, municipal, manufacturing, industrial, hospitality, finance, and oil and gas. TransAlta Corporation was founded in 1909 and is headquartered in Calgary, Canada.

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TransAlta Corporation’s Stock Price as of Market Close

As of December 12, 2025, 4:00 PM, CST, TransAlta Corporation’s stock price was $13.850.

TransAlta Corporation is down 3.95% from its previous closing price of $14.420.

During the last market session, TransAlta Corporation’s stock traded between $13.840 and $14.540. Currently, there are approximately 213.23 million shares outstanding for TransAlta Corporation.

TransAlta Corporation’s trailing earnings per share are negative, so the stock does not have a meaningful P/E ratio. We suggest investors evaluate other financial metrics to understand its overall valuation.

TransAlta Corporation Stock Price History

TransAlta Corporation’s (TAC) price is currently down 4.81% so far this month.

During the month of December, TransAlta Corporation’s stock price has reached a high of $15.240 and a low of $13.840.

Over the last year, TransAlta Corporation has hit prices as high as $17.875 and as low as $7.820. Year to date, TransAlta Corporation’s stock is down 2.12%.

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What Caused TransAlta Corporation Stock’s Price to Dip?

Stock prices are primarily based on seller supply and buyer demand. But have you ever wondered about what other factors affect a stock's price?

One of the most common factors that can drastically impact a stock’s price is analyst upgrades and downgrades. When an analyst changes their opinion of a stock by upgrading or downgrading their rating, it often leads to a sudden stock price adjustment. However, as of December 11, 2025,, no analysts have changed their rating of TransAlta Corporation’s stock over the last month.

Additionally, you'll want to evaluate TransAlta Corporation’s financial health and valuation. Investors can use AAII's Value Grade, which combines six key valuation metrics like P/E and P/S ratios for a comprehensive analysis to conduct analysis on TransAlta Corporation’s valuation and financial health. This approach mitigates the limitations of single-metric evaluations.

TransAlta Corporation’s current valuation based on AAII’s Value Grade is a C, which means it is considered to be Average.

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Lastly, news and media coverage as well as recent press reports about the company or its industry may cause stock prices to fluctuate. You can check out the most recent news articles about TransAlta Corporation (TAC) by visiting AAII Stock Evaluator.

Relative Price Strength of TransAlta Corporation

Relative price strength measures a stock's performance against the market, helping investors identify stocks that are outperforming benchmarks.

For AAII’s Momentum Grade, a weighted relative price strength is calculated. Follow this link to learn more about the Momentum Grade.

As of December 11, 2025, TransAlta Corporation has a weighted four-quarter relative price strength of 1.24%, which translates to a Momentum Score of 61 and is considered to be Strong.

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TransAlta Corporation Stock Price: Bottom Line

As of December 12, 2025, TransAlta Corporation’s stock price is $13.850, which is down 3.95% from its previous closing price.

AAII advises against making stock decisions based solely on price or past returns. Instead, consider a variety of metrics, fundamentals, and analytics to evaluate a stock like TransAlta Corporation stock prices are influenced by market supply and demand and offer just a snapshot of a company's overall health.

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