TAC · NYSE, OTC, OTC, OTC · CIK 0001144800

TRANSALTA CORP

TRANSALTA CORP’s most recent SEC filing in our snapshot is a Form 6-K filed on Oct 22, 2026. In fiscal 2025 (year ended Dec 31, 2025) it reported revenue of CAD 2.4B and net income of -CAD 158.0M, according to its XBRL data on EDGAR. Its EDGAR record lists 0 Form 4 insider filings from the 12 months before our last refresh.

SEC EDGAR snapshot updated Oct 27, 2026, 11:27 PM EDT. See all filings on sec.gov.

Revenue, FY2025
CAD 2.4B
Net income, FY2025
-CAD 158.0M
Form 4 filings on record, past 12 months
0

Company overview

Legal name (as filed)
TRANSALTA CORP
Tickers
TAC, TACPF, TRNTF, TSLTF
SEC Central Index Key (CIK)
0001144800
Industry (SIC)
Electric Services (code 4911)
Business address
CALGARY, Alberta, Canada
State or country of incorporation
—
Fiscal year ends
December 31
SEC filer category
—
Position in SEC ticker list
#1509 of the 3,000 companies we track

Five-year financial highlights

Full-year figures from TRANSALTA CORP’s annual reports, as tagged in XBRL and published by the SEC. Amounts are in CAD; the fiscal year is named for the calendar year in which it ends.

Revenue
CAD 2.7BFY2021CAD 3.0BFY2022CAD 3.4BFY2023CAD 2.8BFY2024CAD 2.4BFY2025
Net income
-CAD 425.0MFY2021CAD 161.0MFY2022CAD 796.0MFY2023CAD 239.0MFY2024-CAD 158.0MFY2025
TAC annual results
ItemFY2021
ended Dec 31, 2021		FY2022
ended Dec 31, 2022		FY2023
ended Dec 31, 2023		FY2024
ended Dec 31, 2024		FY2025
ended Dec 31, 2025
RevenueCAD 2.7BCAD 3.0BCAD 3.4BCAD 2.8BCAD 2.4B
Net income-CAD 425.0MCAD 161.0MCAD 796.0MCAD 239.0M-CAD 158.0M
Diluted EPS-CAD 2.13CAD 0.01CAD 2.33CAD 0.59-CAD 0.64
Total assetsCAD 9.2BCAD 10.7BCAD 8.7BCAD 9.5BCAD 8.7B
Cash and equivalentsCAD 947.0MCAD 1.1BCAD 348.0MCAD 337.0MCAD 205.0M

XBRL tags used: revenue = Revenue; netIncome = ProfitLoss; assets = Assets; eps = DilutedEarningsLossPerShare; cash = CashAndCashEquivalents. EPS is shown as originally reported for each year and may not be adjusted for later stock splits. A dash means the company did not report that item in a form we could match.

How to read these numbers

Revenue is the money a company brings in from selling its products and services; net income is what is left after all expenses, interest and taxes. Diluted EPS spreads net income across every share that could exist if options and convertible securities were exercised. Total assets and cash are balance-sheet figures measured on the last day of the fiscal year. For the full story — segment results, one-time charges, guidance — read Management’s Discussion and Analysis in the Form 10-K.

Latest key reports

The most recent filing of each major report type, even if it falls outside the 40 newest filings below.

TAC latest annual, quarterly, current and proxy reports
FiledFormWhat it isOriginal
Oct 22, 20266-KReport of a foreign private issuer· period Oct 22, 2026Document · Index
Feb 27, 202640-FAnnual report of certain Canadian issuers· period Dec 31, 2025Document · Index

Recent SEC filings

The 40 newest documents filed by or about TRANSALTA CORP, by form type:

6-K ×30FWP ×3SCHEDULE 13G/A ×3SUPPL ×2SCHEDULE 13G ×140-F ×1
TAC recent filings
FiledFormWhat it isOriginal
Oct 22, 20266-KReport of a foreign private issuer· period Oct 22, 2026Document · Index
Oct 6, 20266-KReport of a foreign private issuer· period Oct 5, 2026Document · Index
Sep 14, 20266-KReport of a foreign private issuer· period Sep 14, 2026Document · Index
Jul 31, 20266-KReport of a foreign private issuer· period Jul 31, 2026Document · Index
Jul 31, 20266-KReport of a foreign private issuer· period Jun 30, 2026Document · Index
Jul 29, 20266-KReport of a foreign private issuer· period Jul 29, 2026Document · Index
Jun 30, 20266-KReport of a foreign private issuer· period Jun 30, 2026Document · Index
Jun 15, 20266-KReport of a foreign private issuer· period Jun 15, 2026Document · Index
Jun 9, 20266-KReport of a foreign private issuer· period Jun 9, 2026Document · Index
Jun 9, 20266-KReport of a foreign private issuer· period Jun 9, 2026Document · Index
Jun 5, 20266-KReport of a foreign private issuer· period Jun 5, 2026Document · Index
Jun 5, 2026SUPPLSUPPLDocument · Index
Jun 4, 20266-KReport of a foreign private issuer· period Jun 3, 2026Document · Index
Jun 3, 2026FWPFWPDocument · Index
Jun 3, 2026FWPFWPDocument · Index
Jun 3, 2026FWPFWPDocument · Index
Jun 3, 2026SUPPLSUPPLDocument · Index
May 13, 2026SCHEDULE 13GPassive beneficial ownership report (over 5%)Document · Index
May 6, 20266-KReport of a foreign private issuer· period May 6, 2026Document · Index
May 6, 20266-KReport of a foreign private issuer· period Mar 31, 2026Document · Index
May 6, 2026SCHEDULE 13G/APassive beneficial ownership report (over 5%)Document · Index
May 1, 20266-KReport of a foreign private issuer· period Apr 30, 2026Document · Index
May 1, 20266-KReport of a foreign private issuer· period Apr 30, 2026Document · Index
Apr 30, 20266-KReport of a foreign private issuer· period Apr 29, 2026Document · Index
Apr 20, 20266-KReport of a foreign private issuer· period Apr 20, 2026Document · Index
Apr 7, 20266-KReport of a foreign private issuer· period Apr 7, 2026Document · Index
Mar 31, 20266-KReport of a foreign private issuer· period Mar 12, 2026Document · Index
Mar 23, 20266-KReport of a foreign private issuer· period Mar 23, 2026Document · Index
Mar 17, 20266-KReport of a foreign private issuer· period Mar 17, 2026Document · Index
Mar 17, 20266-KReport of a foreign private issuer· period Mar 17, 2026Document · Index
Mar 2, 20266-KReport of a foreign private issuer· period Mar 2, 2026Document · Index
Feb 27, 20266-KReport of a foreign private issuer· period Feb 27, 2026Document · Index
Feb 27, 20266-KReport of a foreign private issuer· period Feb 27, 2026Document · Index
Feb 27, 20266-KReport of a foreign private issuer· period Feb 27, 2026Document · Index
Feb 27, 20266-KReport of a foreign private issuer· period Dec 31, 2025Document · Index
Feb 27, 202640-FAnnual report of certain Canadian issuers· period Dec 31, 2025Document · Index
Feb 13, 2026SCHEDULE 13G/APassive beneficial ownership report (over 5%)Document · Index
Feb 5, 2026SCHEDULE 13G/APassive beneficial ownership report (over 5%)Document · Index
Jan 28, 20266-KReport of a foreign private issuer· period Jan 27, 2026Document · Index
Dec 22, 20256-KReport of a foreign private issuer· period Dec 22, 2025Document · Index

Insider filing activity

0 Form 4 filings appear in TRANSALTA CORP’s EDGAR record between Oct 28, 2025 and our last refresh. Most are reports by the company’s own directors, officers and 10% owners, but EDGAR also lists a Form 4 under a company when the company itself is the insider — for example, when it owns more than 10% of another public company. Foreign private issuers’ own insiders generally do not file Form 4. A high count is not by itself a signal: many Form 4s report routine stock awards, tax withholding or sales under pre-arranged Rule 10b5-1 plans. Open each filing to see the transaction code, share count and price. What a Form 4 shows.

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Source

  • U.S. Securities and Exchange Commission, EDGAR submissions for CIK 0001144800 and XBRL company facts. TRANSALTA CORP on EDGAR.
  • Snapshot updated Oct 27, 2026, 11:27 PM EDT. The SEC does not endorse OpenFilings. Company names and tickers are used only to identify the filer; no logos are shown.

Not investment advice. This page summarizes public SEC filings for information only. Figures may contain errors or omissions; confirm everything in the original filing before relying on it.