TransAlta Corporation
US ˙ NYSE ˙ CA89346D1078

SecurityTAC / TransAlta Corporation
InstitutionQube Research & Technologies Ltd
Latest Disclosed Ownership211,875 shares
Latest Disclosed Value $ 2,775,638
Qube Research & Technologies Ltd reports 50.31% decrease in ownership of TAC / TransAlta Corporation

On May 15, 2026 - Qube Research & Technologies Ltd filed a 13F-HR form disclosing ownership of 211,875 shares of TransAlta Corporation (US:TAC) valued at $2,775,562 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 426,412 shares of TransAlta Corporation. This represents a change in shares of -50.31% during the quarter. The current value of the position is $3,063,712 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.

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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)
2026-05-15 2026-03-31 13F TRANSALTA COM 89346D107 211,875 -214,537 -50.31 2,776 -48.52 0.0031
2026-02-17 2025-12-31 13F TRANSALTA COM 89346D107 426,412 385,161 933.70 5,390 857.37 0.0055
2025-11-14 2025-09-30 13F TRANSALTA COM 89346D107 41,251 -165,562 -80.05 564 -74.76 0.0006
2025-08-14 2025-06-30 13F TRANSALTA COM 89346D107 206,813 -40,794 -16.48 2,232 -3.59 0.0023
2025-05-15 2025-03-31 13F TRANSALTA COM 89346D107 247,607 247,607 2,315 0.0027
2024-11-14 2024-09-30 13F TRANSALTA COM 89346D107 0 -227,009 -100.00 0 -100.00
2024-08-14 2024-06-30 13F TRANSALTA COM 89346D107 227,009 108,267 91.18 1,607 110.62 0.0025
2024-05-14 2024-03-31 13F TRANSALTA COM 89346D107 118,742 39,734 50.29 764 16.31 0.0012
2024-02-13 2023-12-31 13F TRANSALTA COM 89346D107 79,008 61,818 359.62 657 340.27 0.0013
2023-11-13 2023-09-30 13F TRANSALTA COM 89346D107 17,190 17,190 150 0.0004
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.