TransAltaTAC 51 10-Year Share Buyback Ratio is -0.40 as of Mar. 2026. GuruFocus rates TAC with a GF Score™ of 51/100 and a GF Value™ of $6.86 (Significantly Overvalued). The stock has 6 warning signs investors should review. Among 213 Utilities - Independent Power Producers companies, TransAlta ranks better than 81.69% on this metric.
Shares Outstanding (EOP) are shares that have been authorized, issued, and purchased by investors and are held by them.
10-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past ten years. It is calculated as the annualized percentage change in shares outstanding from ten years ago to the current year. A positive ratio may indicate share buybacks over the period, while a zero or negative ratio may reflect no repurchases or potential share issuance. TransAlta's current 10-Year Share Buyback Ratio was -0.40%.
TAC's 10-Year Share Buyback Ratio is ranked better than 81.69% of 213
companies
in the Utilities - Independent Power Producers industry
Industry Median: -2.9
vs TAC: -0.40
TransAlta (NYSE:TAC) 10-Year Share Buyback Ratio Explanation
A negative number means the company might be issuing new shares. A positive number indicates that the company is buying back shares.
Be Aware
Investors usually like share buybacks. But as pointed by Warren Buffett, only if a company buys back shares at the prices below the stock's intrinsic value, it rewards remaining shareholders. If a company buys its overvalued stocks back, it destroys shareholder value.
TransAlta 10-Year Share Buyback Ratio Related Terms
TAC vs CEG, VST, NRG: 10-Year Share Buyback Ratio Comparison
For the Utilities - Independent Power Producers subindustry, TransAlta's 10-Year Share Buyback Ratio, along with its competitors' market caps and 10-Year Share Buyback Ratio data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
TransAlta 10-Year Share Buyback Ratio vs Utilities - Independent Power Producers Industry
For the Utilities - Independent Power Producers industry and Utilities sector, TransAlta's 10-Year Share Buyback Ratio distribution charts can be found below:
* The bar in red indicates where TransAlta's 10-Year Share Buyback Ratio falls into.
This is the annualized percentage change in shares outstanding from ten years ago to the current year. The annualized percentage change is calculated with least-square regression based on the eleven years of annual data on Shares Outstanding (EOP).
Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the average dividends per share growth rate.
What does a 10-Year Share Buyback Ratio of -0.40 mean?
TransAlta (TAC) has a 10-Year Share Buyback Ratio of -0.40 as of Mar. 2026. The 10-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past ten years. It is calculated as the annualized percentage change in shares outstanding from ten years ago to the current year. View historical data for TransAlta and its competitors. According to the industry distribution chart, TransAlta ranks #39 out of 213 companies in the Utilities - Independent Power Producers industry, placing it in the top 18.3%.
Is TransAlta's 10-Year Share Buyback Ratio too high?
TransAlta's current 10-Year Share Buyback Ratio is -0.40. Based on the distribution chart, TransAlta ranks #39 out of 213 companies in the Utilities - Independent Power Producers industry, which is in the top quartile — a strong position relative to peers. Overall, TransAlta has a GF Score™ of 51/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does TransAlta's 10-Year Share Buyback Ratio compare to CEG and VST?
According to the Utilities - Independent Power Producers industry distribution chart, TransAlta ranks #39 out of 213 companies for 10-Year Share Buyback Ratio. This places TransAlta in the top 18% of its industry — outperforming the majority of peers. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good 10-Year Share Buyback Ratio for an Utilities - Independent Power Producers company?
A good 10-Year Share Buyback Ratio depends on the Utilities - Independent Power Producers industry context. However, 10-Year Share Buyback Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high 10-Year Share Buyback Ratio mean?
A high 10-Year Share Buyback Ratio can signal that a stock is expensive relative to its fundamentals. The 10-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past ten years. It is calculated as the annualized percentage change in shares outstanding from ten years ago to the current year. View historical data for TransAlta and its competitors. TransAlta's current 10-Year Share Buyback Ratio is -0.40. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is TransAlta stock overvalued right now?
Based on GuruFocus' analysis, TransAlta (TAC) is currently considered Significantly Overvalued. The stock's GF Value™ is $6.86, compared to a current price of $13.69 — trading 99.6% above its estimated fair value. The current 10-Year Share Buyback Ratio is -0.40. TransAlta's overall GF Score™ is 51/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is 10-Year Share Buyback Ratio calculated?
10-Year Share Buyback Ratio is calculated from a company's financial statements. For TransAlta (TAC), the current 10-Year Share Buyback Ratio is -0.40 as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is TransAlta (TAC) Overvalued in 2026?
Based on GuruFocus' analysis, TransAlta stock appears to be overvalued.
The current stock price of $13.69 is trading 99.6% above its estimated GF Value™ of $6.86.
GuruFocus considers TransAlta to be Significantly Overvalued.
Key valuation signals for TAC:
10-Year Share Buyback Ratio: -0.40
GF Value™: $6.86 vs. price of $13.69 (99.6% above fair value)
No single metric tells the full story. See the TAC stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
TransAlta Corp is an independent power producer based in Alberta, Canada. The company operates a diverse electrical power generation assets in Canada, the United States, and Western Australia. The company has reportable segments namely, Hydro, Wind & Solar, Gas, Energy Transition segment and Corporate Segment. The company generates the majority of its revenue from the gas segment.
51GF Score
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10-Year Share Buyback Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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