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Video: Compound Annual Growth Rate (CAGR) Definition
TAC Historical Price Range
Date Open High Low Close Volume
08/03/2026 $12.20 $12.52 $12.10 $12.34 578.90K
08/04/2026 $12.48 $12.85 $12.31 $12.76 3.61M
08/05/2026 $12.79 $12.92 $12.66 $12.67 1.49M
08/06/2026 $12.67 $12.73 $12.41 $12.48 1.77M
08/07/2026 $12.52 $12.71 $12.41 $12.43 1.56M
About TransAlta
TransAlta Corporation owns, operates and develops a diverse fleet of electrical power generation assets in Canada, the U.S. and Australia. It provides municipalities, medium and large industries, businesses and utility customers with affordable, energy-efficient and reliable power. It also produces wind power and hydro-electric power. Its segments include Hydro, Wind & Solar, Gas, Energy Transition, Energy Marketing, and Corporate. It has a diversified fleet of hydro, wind, solar, natural gas, and cogeneration generate 7,300 megawatt of electricity. It delivers renewable energy solutions for large scale commercial partners, including tech companies.
TAC historical stock prices picture
TransAlta (TAC) has the following price history information. Looking back at TAC historical stock prices for the last five trading days, on August 03, 2026, TAC opened at $12.20, traded as high as $12.52 and as low as $12.10, and closed at $12.34. Trading volume was a total of 578.90K shares. On August 04, 2026, TAC opened at $12.48, traded as high as $12.85 and as low as $12.31, and closed at $12.76. Trading volume was a total of 3.61M shares. On August 05, 2026, TAC opened at $12.79, traded as high as $12.92 and as low as $12.66, and closed at $12.67. Trading volume was a total of 1.49M shares. On August 06, 2026, TAC opened at $12.67, traded as high as $12.73 and as low as $12.41, and closed at $12.48. Trading volume was a total of 1.77M shares. On August 07, 2026, TAC opened at $12.52, traded as high as $12.71 and as low as $12.41, and closed at $12.43. Trading volume was a total of 1.56M shares.

TAC Historical Stock Prices By Date:

TAC historical cagr picture

Below, we examine the compound annual growth rate — CAGR for short — of an investment into TransAlta shares, starting with a $10,000 purchase of TAC, and working forward through the historical stock price information to today.

Growth of $10,000.00
With Dividends Reinvested
Start date: 08/10/2016
End date: 08/07/2026
Start price/share: $4.66
End price/share: $12.43
Starting shares: 2,145.92
Ending shares: 2,559.19
Dividends reinvested/share: $1.35
Total return: 218.11%
Average Annual Total Return: 12.27%
Starting investment: $10,000.00
Ending investment: $31,805.30
Years: 10.00
 
Growth of $10,000.00
Without Dividends Reinvested
Start date: 08/10/2016
End date: 08/07/2026
Start price/share: $4.66
End price/share: $12.43
Dividends collected/share: $1.35
Total return: 195.75%
Average Annual Total Return: 11.46%
Starting investment: $10,000.00
Ending investment: $29,584.30
Years: 10.00
TAC Historical Closing Prices
Date Close
08/03/2026$12.34
08/04/2026$12.76
08/05/2026$12.67
08/06/2026$12.48
08/07/2026$12.43
Materials Historical Prices
TAC is categorized under the Materials sector; below are some other companies in the same sector:

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Also explore: TAC shares outstanding history

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