TransAlta Corporation (TAC) Stock Price History
Historical prices from 2001 to 2026
- 1M
- +4.3%
- 3M
- -8.3%
- YTD
- -5.1%
- 1Y
- -9.9%
- 3Y
- +13.9%
- 5Y
- +3.1%
Loading 10-year price history...
TAC Historical Performance
TAC Annual Returns
Year-by-year price performance · 2002–2026
- 2002 annual price return
- -19.0%
- 2003 annual price return
- +27.3%
- 2004 annual price return
- +4.6%
- 2005 annual price return
- +44.5%
- 2006 annual price return
- -0.6%
- 2007 annual price return
- +45.2%
- 2008 annual price return
- -40.7%
- 2009 annual price return
- +7.7%
- 2010 annual price return
- -6.0%
- 2011 annual price return
- -3.7%
- 2012 annual price return
- -27.9%
- 2013 annual price return
- -18.3%
- 2014 annual price return
- -28.4%
- 2015 annual price return
- -61.2%
- 2016 annual price return
- +57.1%
- 2017 annual price return
- +8.2%
- 2018 annual price return
- -30.8%
- 2019 annual price return
- +71.3%
- 2020 annual price return
- +8.1%
- 2021 annual price return
- +45.2%
- 2022 annual price return
- -23.5%
- 2023 annual price return
- -6.6%
- 2024 annual price return
- +71.1%
- 2025 annual price return
- -10.2%
- 2026 annual price return
- -4.0%
TAC Stock Price Trajectory (2001–2026)
As of October 3, 2026, TransAlta Corporation (TAC) trades at $12.35, representing a -9.9% return over the past year. The stock has delivered a +24.4% total return over five years (+3.1% CAGR), reflecting significant long-term value creation.
The stock reached its all-time high of $37.84 on July 21, 2008. From this peak, TAC has corrected -67.4%, currently trading 4% below its 200-day moving average, suggesting potential weakness.
When compared to Utilities sector peers NRG (-43.1% 1Y), VST (-30.9% 1Y), and CWEN (-2.4% 1Y), TAC has underperformed the peer group average. Compare TAC vs NRG →
TAC Historical Price Data · from 2001
Rows 1–50 of 6,331| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-10-02 | 12.27 | 12.44 | 12.18 | 12.35 | 1.08M | +1.06% |
| 2026-10-01 | 12.12 | 12.36 | 12.09 | 12.22 | 1.23M | +1.16% |
| 2026-09-30 | 11.82 | 12.13 | 11.73 | 12.08 | 1.13M | +2.46% |
| 2026-09-29 | 11.79 | 11.87 | 11.60 | 11.79 | 848K | -0.17% |
| 2026-09-28 | 11.49 | 11.98 | 11.41 | 11.81 | 2.01M | +2.43% |
| 2026-09-25 | 11.77 | 11.89 | 11.46 | 11.53 | 703K | -2.04% |
| 2026-09-24 | 11.82 | 11.87 | 11.68 | 11.77 | 964K | -1.51% |
| 2026-09-23 | 11.93 | 12.04 | 11.81 | 11.95 | 964K | +0.17% |
| 2026-09-22 | 12.29 | 12.36 | 11.89 | 11.93 | 1000K | -3.09% |
| 2026-09-21 | 12.35 | 12.41 | 12.22 | 12.31 | 1.36M | +0.74% |
| 2026-09-18 | 12.24 | 12.33 | 12.13 | 12.22 | 1.05M | -0.57% |
| 2026-09-17 | 12.10 | 12.31 | 12.10 | 12.29 | 714K | +2.85% |
| 2026-09-16 | 11.63 | 12.12 | 11.63 | 11.95 | 1.15M | +3.91% |
| 2026-09-15 | 11.82 | 11.96 | 11.47 | 11.50 | 600K | -2.46% |
| 2026-09-14 | 11.98 | 11.98 | 11.71 | 11.79 | 1.13M | -2.40% |
| 2026-09-11 | 12.27 | 12.28 | 12.04 | 12.08 | 863K | -0.82% |
| 2026-09-10 | 12.24 | 12.31 | 12.06 | 12.18 | 1.10M | -1.38% |
| 2026-09-09 | 12.35 | 12.50 | 12.25 | 12.35 | 745K | -0.48% |
| 2026-09-08 | 12.01 | 12.52 | 12.00 | 12.41 | 1.02M | +3.76% |
| 2026-09-04 | 11.79 | 12.07 | 11.75 | 11.96 | 1.05M | +1.27% |
| 2026-09-03 | 11.91 | 11.98 | 11.72 | 11.81 | 1.26M | -0.25% |
| 2026-09-02 | 11.74 | 11.90 | 11.65 | 11.84 | 1.12M | +0.59% |
| 2026-09-01 | 11.99 | 12.12 | 11.69 | 11.77 | 985K | -2.65% |
| 2026-08-31 | 12.21 | 12.21 | 12.01 | 12.09 | 922K | -0.82% |
| 2026-08-28 | 12.54 | 12.55 | 12.11 | 12.19 | 851K | -2.48% |
| 2026-08-27 | 12.64 | 12.72 | 12.37 | 12.50 | 941K | -1.11% |
| 2026-08-26 | 12.18 | 12.75 | 12.18 | 12.64 | 1.10M | +3.18% |
| 2026-08-25 | 12.25 | 12.29 | 12.10 | 12.25 | 887K | +1.24% |
| 2026-08-24 | 12.16 | 12.16 | 11.87 | 12.10 | 1.06M | -0.90% |
| 2026-08-21 | 12.67 | 12.75 | 12.19 | 12.21 | 1.59M | -3.02% |
| 2026-08-20 | 12.29 | 12.84 | 12.29 | 12.59 | 1.17M | +1.70% |
| 2026-08-19 | 12.57 | 12.61 | 12.29 | 12.38 | 925K | -0.72% |
| 2026-08-18 | 12.62 | 12.68 | 12.44 | 12.47 | 966K | -1.89% |
| 2026-08-17 | 12.82 | 12.84 | 12.66 | 12.71 | 1.28M | -0.63% |
| 2026-08-14 | 12.60 | 12.88 | 12.60 | 12.79 | 890K | +1.43% |
| 2026-08-13 | 12.39 | 12.63 | 12.38 | 12.61 | 2.42M | +1.69% |
| 2026-08-12 | 12.50 | 12.67 | 12.30 | 12.40 | 3.84M | -0.64% |
| 2026-08-11 | 12.30 | 12.54 | 12.30 | 12.48 | 1.87M | +1.79% |
| 2026-08-10 | 12.39 | 12.47 | 12.22 | 12.26 | 964K | -1.37% |
| 2026-08-07 | 12.52 | 12.71 | 12.41 | 12.43 | 1.56M | -0.40% |
| 2026-08-06 | 12.67 | 12.73 | 12.41 | 12.48 | 1.77M | -1.50% |
| 2026-08-05 | 12.79 | 12.92 | 12.66 | 12.67 | 1.49M | -0.71% |
| 2026-08-04 | 12.48 | 12.85 | 12.31 | 12.76 | 3.61M | +3.40% |
| 2026-08-03 | 12.20 | 12.52 | 12.10 | 12.34 | 579K | -1.28% |
| 2026-07-31 | 12.88 | 13.00 | 12.48 | 12.50 | 3.42M | -2.80% |
| 2026-07-30 | 12.78 | 12.92 | 12.56 | 12.86 | 1.37M | +3.46% |
| 2026-07-29 | 12.82 | 12.84 | 12.33 | 12.43 | 2.76M | -2.43% |
| 2026-07-28 | 13.36 | 13.36 | 12.67 | 12.74 | 2.75M | -5.28% |
| 2026-07-27 | 13.73 | 13.73 | 13.30 | 13.45 | 1.17M | -1.97% |
| 2026-07-24 | 14.05 | 14.07 | 13.69 | 13.72 | 854K | -2.76% |
TAC Chart Terminal
Live VCP patterns, Cup & Handle overlays, support/resistance, and AI trade plans.
Live Breakouts Feed
High-probability breakout stocks crossing their pivot across 5 pattern engines.
Intrinsic Valuation
DCF models, multiple analysis, and analyst estimates.
Historical Returns
10-year return with dividends reinvested.
Peer Comparison
Compare growth, multiples, and margins vs sector.
TAC — Frequently Asked Questions
Quick answers to the most common questions about buying TAC stock.
How has TAC stock performed recently?
TAC declined -9.9% over the past year, below its 5-year annualized CAGR of +3.1%. The stock trades below its 200-day moving average, reflecting the downtrend.
What is TAC's all-time high price?
TransAlta Corporation reached $37.84 on 2008-07-21. The 52-week high is $17.88. Current 1-year return of -9.9% places the stock further from historical peaks.
Where can I download TAC historical price data?
This page provides TAC daily OHLCV data with 50-day MA, 200-day MA, and RSI indicators. Data spans 2001-2026, downloadable in CSV format.