TransAlta Corporation
DE ˙ DB ˙ CA89346D1078
12,48 € ↑0,42 (3,44%)
2026-06-03
DEL PRIS
SecurityDE:TZ1 / TransAlta Corporation
InstitutionVanguard Group Inc
Latest Disclosed Ownership11,123,833 shares
Latest Disclosed Value $ 140,694,240
Vanguard Group Inc reports 1.59% increase in ownership of TZ1 / TransAlta Corporation

On January 29, 2026 - Vanguard Group Inc filed a 13F-HR form disclosing ownership of 11,123,833 shares of TransAlta Corporation (DE:TZ1) valued at $119,414,347 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 7, 2025 disclosing 10,949,384 shares of TransAlta Corporation. This represents a change in shares of 1.59% during the quarter. The current value of the position is $138,825,436 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-01-29 2025-12-31 13F TRANSALTA COM 89346D107 11,123,833 174,449 1.59 140,694 -5.93 0.0020
2025-11-07 2025-09-30 13F TRANSALTA COM 89346D107 10,949,384 248,027 2.32 149,569 29.56 0.0022
2025-08-11 2025-06-30 13F TRANSALTA COM 89346D107 10,701,357 409,389 3.98 115,446 20.19 0.0019
2025-05-09 2025-03-31 13F TRANSALTA COM 89346D107 10,291,968 62,145 0.61 96,055 -33.61 0.0017
2025-02-11 2024-12-31 13F TRANSALTA COM 89346D107 10,229,823 150,554 1.49 144,680 38.47 0.0025
2024-11-13 2024-09-30 13F TRANSALTA COM 89346D107 10,079,269 -167,788 -1.64 104,482 44.01 0.0019
2024-08-13 2024-06-30 13F TRANSALTA COM 89346D107 10,247,057 122,258 1.21 72,549 11.44 0.0014
2024-05-10 2024-03-31 13F TRANSALTA COM 89346D107 10,124,799 -373,652 -3.56 65,102 -25.38 0.0013
2024-03-11 2023-12-31 13F/A-1 TRANSALTA COM 89346D107 10,498,451 2,116,907 25.26 87,242 19.64 0.0019
2024-02-14 2023-12-31 13F TRANSALTA COM 89346D107 10,498,451 2,116,907 87,242 0.0017
2023-12-18 2023-09-30 13F/A-1 TRANSALTA COM 89346D107 8,381,544 82,419 0.99 72,919 -6.13 0.0018
2023-11-14 2023-09-30 13F TRANSALTA COM 89346D107 8,381,544 82,419 72,919 0.0003
2023-08-14 2023-06-30 13F TRANSALTA COM 89346D107 8,299,125 103,577 1.26 77,680 8.32 0.0018
2023-07-14 2023-03-31 13F/A-1 TRANSALTA COM 89346D107 8,195,548 25,998 0.32 71,711 -2.14 0.0018
2023-05-15 2023-03-31 13F TRANSALTA COM 89346D107 8,195,548 25,998 71,711 0.0004
2023-02-10 2022-12-31 13F TRANSALTA COM 89346D107 8,169,550 215,104 2.70 73,281 4.33 0.0020
2022-11-14 2022-09-30 13F TRANSALTA COM 89346D107 7,954,446 201,919 2.60 70,238 -20.53 0.0021
2022-08-12 2022-06-30 13F TRANSALTA COM 89346D107 7,752,527 76,405 1.00 88,378 11.13 0.0025
2022-05-13 2022-03-31 13F TRANSALTA COM 89346D107 7,676,122 -47,979 -0.62 79,525 -7.41 0.0019
2022-02-14 2021-12-31 13F TRANSALTA COM 89346D107 7,724,101 84,412 1.10 85,892 6.47 0.0020
2021-11-12 2021-09-30 13F TRANSALTA COM 89346D107 7,639,689 -193,105 -2.47 80,676 3.20 0.0020
2021-08-13 2021-06-30 13F TRANSALTA COM 89346D107 7,832,794 -714,860 -8.36 78,171 -3.33 0.0019
2021-05-14 2021-03-31 13F TRANSALTA COM 89346D107 8,547,654 291,933 3.54 80,860 29.04 0.0022
2021-02-12 2020-12-31 13F TRANSALTA COM 89346D107 8,255,721 22,332 0.27 62,661 23.75 0.0018
2020-11-16 2020-09-30 13F TRANSALTA COM 89346D107 8,233,389 -40,775 -0.49 50,636 3.20 0.0017
2020-08-14 2020-06-30 13F TRANSALTA COM 89346D107 8,274,164 -319,585 -3.72 49,066 8.96 0.0017
2020-05-15 2020-03-31 13F TRANSALTA COM 89346D107 8,593,749 639,095 8.03 45,031 -20.94 0.0019
2020-02-14 2019-12-31 13F TRANSALTA COM 89346D107 7,954,654 40,188 0.51 56,955 10.71 0.0019
2019-11-14 2019-09-30 13F TRANSALTA COM 89346D107 7,914,466 97,350 1.25 51,444 1.09 0.0019
2019-08-14 2019-06-30 13F TRANSALTA COM 89346D107 7,817,116 211,378 2.78 50,889 -8.84 0.0019
2019-05-15 2019-03-31 13F TRANSALTA COM 89346D107 7,605,738 171,420 2.31 55,826 82.26 0.0022
2019-02-14 2018-12-31 13F TRANSALTA COM 89346D107 7,434,318 282,203 3.95 30,630 -23.91 0.0014
2018-12-13 2018-09-30 13F/A-2 TRANSALTA COM 89346D107 7,152,115 477,166 7.15 40,255 20.61 0.0016
2018-11-23 2018-09-30 13F/A-1 TRANSALTA COM 89346D107 7,152,115 0 40,255 0.0016
2018-11-14 2018-09-30 13F TRANSALTA COM 89346D107 7,152,115 477,166 40,255
2018-08-14 2018-06-30 13F TRANSALTA COM 89346D107 6,674,949 121,132 1.85 33,375 -6.56 0.0014
2018-05-15 2018-03-31 13F TRANSALTA COM 89346D107 6,553,817 119,166 1.85 35,719 -6.70 0.0016
2018-02-14 2017-12-31 13F TRANSALTA COM 89346D107 6,434,651 362,583 5.97 38,286 7.78 0.0017
2017-11-14 2017-09-30 13F TRANSALTA COM 89346D107 6,072,068 216,657 3.70 35,522 -5.21 0.0017
2017-08-24 2017-06-30 13F/A-1 TRANSALTA COM 89346D107 5,855,411 298,315 5.37 37,475 15.28 0.0018
2017-08-11 2017-06-30 13F TRANSALTA COM 89346D107 5,855,411 298,315 37,475
2017-05-12 2017-03-31 13F TRANSALTA COM 89346D107 5,557,096 220,705 4.14 32,509 10.76 0.0017
2017-02-14 2016-12-31 13F TRANSALTA COM 89346D107 5,336,391 175,417 3.40 29,350 27.79 0.0016
2016-11-14 2016-09-30 13F TRANSALTA COM 89346D107 5,160,974 195,210 3.93 22,967 -11.40 0.0013
2016-08-10 2016-06-30 13F TRANSALTA COM 89346D107 4,965,764 623,815 14.37 25,922 28.39 0.0016
2016-05-13 2016-03-31 13F TRANSALTA COM 89346D107 4,341,949 779,621 21.89 20,190 60.10 0.0013
2016-02-08 2015-12-31 13F TRANSALTA COM 89346D107 3,562,328 -21,203 -0.59 12,611 -24.32 0.0008
2015-11-12 2015-09-30 13F/A-1 TRANSALTA COM 89346D107 3,583,531 444,399 14.16 16,663 -31.51 0.0007
2015-11-12 2015-09-30 13F/A-1 TRANSALTA COM 89346D107 3,583,531 444,399 16,663 0.0007
2015-08-13 2015-06-30 13F TRANSALTA COM 89346D107 3,139,132 341,974 12.23 24,328 -6.48 0.0016
2015-05-15 2015-03-31 13F/A-1 TRANSALTA COM 89346D107 2,797,158 2,797,158 26,014 0.0018
2015-05-14 2015-03-31 13F TRANSALTA COM 89346D107 2,797,158 26,014 0.0016
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.