TransAlta Corporation
TAC | NYSE
$12.31
+$0.09 (+0.74%)
At close: Sep 21, 2026, 4:00 PM ET
$12.31
$0 (0.00%)
After-hours:
Sep 21, 2026, 5:31 PM ET
Market Cap History History
Annual Market Cap Change Annual Change
| Date | Market Cap | Change | % Change |
|---|---|---|---|
| Sep 17, 2026 | $3.69B | $676.56M | +22.45% |
| Dec 25, 2025 | $3.01B | -$1.2B | -28.50% |
| Dec 26, 2024 | $4.22B | $2.03B | +92.86% |
| Dec 28, 2023 | $2.19B | -$245.34M | -10.09% |
| Dec 29, 2022 | $2.43B | -$582.65M | -19.33% |
| Dec 30, 2021 | $3.01B | $964.22M | +47.05% |
| Dec 30, 2020 | $2.05B | $66.84M | +3.37% |
| Dec 26, 2019 | $1.98B | $794.28M | +66.85% |
| Dec 27, 2018 | $1.19B | -$525.42M | -30.66% |
| Dec 28, 2017 | $1.71B | $129.6M | +8.18% |
| Dec 29, 2016 | $1.58B | $582.18M | +58.11% |
| Dec 30, 2015 | $1B | -$1.49B | -59.76% |
| Dec 25, 2014 | $2.49B | -$851.2M | -25.48% |
| Dec 26, 2013 | $3.34B | -$183.08M | -5.20% |
| Dec 27, 2012 | $3.52B | -$1.07B | -23.36% |
| Dec 29, 2011 | $4.6B | $16.9M | +0.37% |
| Dec 30, 2010 | $4.58B | -$95.34M | -2.04% |
| Dec 30, 2009 | $4.68B | $938.46M | +25.10% |
| Dec 25, 2008 | $3.74B | -$3.19B | -46.04% |
| Dec 27, 2007 | $6.93B | $2.46B | +55.16% |
| Dec 28, 2006 | $4.47B | n/a | n/a |
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