TRANSALTA CORPORATION Form SUPPL: Voluntary supplemental material by a foreign issuer
Filings on SEC EDGAR, newest first; amendments sit with their base form. Values are as filed.
- 2026-06-05: Form SUPPL; Description SUPPL; Document d148742dsuppl.htm.
- 2026-06-03: Form SUPPL; Description SUPPL; Document d148742dsuppl.htm.
- 2025-12-12: Form SUPPL; Description SUPPL; Document d938159dsuppl.htm.
- 2025-12-11: Form SUPPL; Description SUPPL; Document d938159dsuppl.htm.
| Filed | Form | Period of report | Description | Document |
|---|---|---|---|---|
| 2026-06-05 | SUPPL | SUPPL | d148742dsuppl.htm | |
| 2026-06-03 | SUPPL | SUPPL | d148742dsuppl.htm | |
| 2025-12-12 | SUPPL | SUPPL | d938159dsuppl.htm | |
| 2025-12-11 | SUPPL | SUPPL | d938159dsuppl.htm | |
| 2022-11-16 | SUPPL | SUPPL | d396528dsuppl.htm | |
| 2022-11-14 | SUPPL | SUPPL | d396528dsuppl.htm | |
| 2014-05-30 | SUPPL | SUPPL | a2220363zsuppl.htm | |
| 2014-05-29 | SUPPL | SUPPL | a2220330zsuppl.htm | |
| 2012-11-05 | SUPPL | SUPPL | a2211568zsuppl.htm | |
| 2012-11-02 | SUPPL | SUPPL | a2211568zsuppl.htm | |
| 2010-03-10 | SUPPL | SUPPLEMENT | a2197169zsuppl.htm | |
| 2010-03-09 | SUPPL | SUPPLEMENT | a2197169zsuppl.htm | |
| 2009-11-10 | SUPPL | SUPPL | a2195387zsuppl.htm | |
| 2009-11-09 | SUPPL | SUPPL | a2195387zsuppl.htm | |
| 2009-10-30 | SUPPL | SUPPL | a2195164zsuppl.htm | |
| 2008-05-08 | SUPPL | SUPPL | a2185457zsuppl.htm | |
| 2008-05-05 | SUPPL | SUPPL | a2185457zsuppl.htm | |
| 2003-11-21 | SUPPL | SUPPLEMENT | a2122820zsuppl.txt | |
| 2002-06-21 | SUPPL | SUPPL | a2082914zsuppl.txt |