TransAlta Corporation (TAC) Stock Price History
Historical prices from 2011 to 2026
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TAC Historical Performance
Short-Term Returns
TAC Stock Price Trajectory (2011–2026)
As of May 8, 2026, TransAlta Corporation (TAC) trades at $12.77, representing a +49.9% return over the past year. The stock has delivered a +39.8% total return over five years (+5.6% 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 -66.3%, currently trading 5% below its 200-day moving average, suggesting potential weakness.
When compared to Utilities sector peers NRG (+19.4% 1Y), VST (+10.4% 1Y), and CWEN (+33.3% 1Y), TAC has underperformed the peer group average. Compare TAC vs NRG →
TAC Historical Price Data (2025–2026)
Showing 30 of 3,650 recordsLoading full history…
| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-05-07 | 12.88 | 12.88 | 12.38 | 12.77 | 1.04M | -0.16% |
| 2026-05-06 | 12.62 | 13.19 | 12.40 | 12.79 | 1.87M | +1.51% |
| 2026-05-05 | 12.69 | 12.73 | 12.44 | 12.60 | 535K | -0.16% |
| 2026-05-04 | 12.48 | 12.62 | 12.36 | 12.62 | 1.18M | +1.12% |
| 2026-05-01 | 12.49 | 12.63 | 12.39 | 12.48 | 1.03M | 0.00% |
| 2026-04-30 | 12.13 | 12.56 | 12.08 | 12.48 | 1.68M | +3.91% |
| 2026-04-29 | 12.69 | 12.78 | 11.94 | 12.01 | 1.36M | -5.51% |
| 2026-04-28 | 12.48 | 12.87 | 12.45 | 12.71 | 806K | +0.95% |
| 2026-04-27 | 12.63 | 12.70 | 12.41 | 12.59 | 639K | +0.80% |
| 2026-04-24 | 12.12 | 12.55 | 11.98 | 12.49 | 904K | +3.39% |
| 2026-04-23 | 12.33 | 12.54 | 11.93 | 12.08 | 745K | -1.63% |
| 2026-04-22 | 12.31 | 12.38 | 12.02 | 12.28 | 599K | +0.99% |
| 2026-04-21 | 12.45 | 12.70 | 12.13 | 12.16 | 999K | -3.95% |
| 2026-04-20 | 12.65 | 12.78 | 12.54 | 12.66 | 1.01M | 0.00% |
| 2026-04-17 | 13.35 | 13.50 | 12.65 | 12.66 | 1.75M | -6.22% |
| 2026-04-16 | 13.66 | 13.68 | 13.36 | 13.50 | 553K | -1.32% |
| 2026-04-15 | 13.46 | 13.90 | 13.32 | 13.68 | 772K | +1.41% |
| 2026-04-14 | 13.71 | 13.79 | 13.43 | 13.49 | 659K | -1.39% |
| 2026-04-13 | 13.92 | 13.98 | 13.66 | 13.68 | 420K | -2.29% |
| 2026-04-10 | 13.88 | 14.12 | 13.87 | 14.00 | 522K | +1.23% |
| 2026-04-09 | 13.80 | 14.24 | 13.75 | 13.83 | 879K | 0.00% |
| 2026-04-08 | 14.02 | 14.02 | 13.57 | 13.83 | 653K | +2.14% |
| 2026-04-07 | 13.58 | 13.79 | 13.39 | 13.54 | 818K | -0.73% |
| 2026-04-06 | 13.41 | 13.71 | 13.41 | 13.64 | 744K | +1.19% |
| 2026-04-02 | 13.07 | 13.49 | 13.03 | 13.48 | 700K | +1.43% |
| 2026-04-01 | 13.22 | 13.46 | 13.15 | 13.29 | 1.26M | +1.45% |
| 2026-03-31 | 12.90 | 13.25 | 12.81 | 13.10 | 1.53M | +3.07% |
| 2026-03-30 | 13.05 | 13.05 | 12.61 | 12.71 | 1.06M | -1.63% |
| 2026-03-27 | 12.94 | 13.08 | 12.79 | 12.92 | 991K | -0.15% |
| 2026-03-26 | 12.98 | 13.21 | 12.87 | 12.94 | 1.12M | -0.92% |
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Start ComparisonTAC — Frequently Asked Questions
Quick answers to the most common questions about buying TAC stock.
How has TAC stock performed recently?
TAC returned +49.9% over the past year, beating its 5-year annualized CAGR of +5.6%. The stock trades below its 200-day moving average, confirming the uptrend.
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 +49.9% places the stock closer to 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 2011-2026, downloadable in CSV format.