Welcome to our dedicated page for Transalta SEC filings (Ticker: TSLTF), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The SEC filings page for TRANSALTA CORP PFD E (TSLTF) aggregates U.S. regulatory documents submitted by TransAlta Corporation that are relevant to this preferred share series. As a foreign private issuer and Form 40-F filer, TransAlta reports current information primarily through Form 6-K, and references a cross-border registration statement on Form F-10.
Among the filings, investors will find a Form 6-K that identifies a Second Supplemental Indenture dated December 22, 2025, filed as Exhibit 99.1 and incorporated by reference into the Form F-10 registration statement. Supplemental indentures are key documents for understanding how specific securities, including preferred shares, are governed under existing trust indentures.
Other Form 6-K reports provide insight into the issuer’s operations and asset portfolio, which are important when assessing the credit profile behind the TRANSALTA CORP PFD E series. These include filings describing TransAlta’s notice to mothball Sheerness Unit 1, a long-term agreement for 700 MW at the Centralia facility enabling coal to natural gas conversion, and the planned acquisition of a 310 MW contracted Ontario gas portfolio. Each filing offers details on commitments and changes that can influence the company’s overall financial and operational position.
The filings set also covers governance disclosures, such as the Form 6-K announcing president and CEO succession. Leadership and governance information can be relevant to preferred shareholders evaluating how the company is managed.
On Stock Titan, these filings are presented with AI-powered summaries that explain the main points of each document, helping users interpret complex legal and technical language. Real-time updates from EDGAR ensure that new Form 6-K submissions, supplemental indentures, and other key exhibits related to TransAlta Corporation and the TSLTF preferred shares are accessible as they are filed.
TransAlta Corporation filed a Form 6-K for November 2025, signed by its Executive Vice President Finance and Chief Financial Officer, Joel Hunter. The report includes an exhibit titled "TransAlta to Acquire 310 MW Contracted Ontario Gas Portfolio for $95 million," indicating a planned acquisition of a sizable, contracted natural gas power portfolio in Ontario. This suggests an expansion of TransAlta's generation assets through a contracted capacity addition of 310 megawatts.
TransAlta Corporation (TAC) received an amended Schedule 13G (Amendment No. 2) from Millennium Management affiliates and Integrated Core Strategies (Asia) Pte. Ltd., reporting passive beneficial ownership as of 09/30/2025.
Millennium Management LLC, Millennium Group Management LLC, and Israel A. Englander each report beneficial ownership of 13,115,689 common shares, representing 4.4% of the class, with shared voting and dispositive power. Integrated Core Strategies (Asia) Pte. Ltd. reports 11,672,205 common shares, representing 3.9% of the class, also with shared voting and dispositive power.
The filing includes the standard passive investor certification stating the shares were not acquired to change or influence control.
Goldman Sachs Group Inc. and Goldman Sachs & Co. LLC filed an amended Schedule 13G reporting beneficial ownership in TransAlta Corporation. As of 09/30/2025, they reported 7,054,299.44 common shares, representing 2.4% of the class.
The filing shows 0 shares with sole voting or dispositive power and 7,054,299.44 shares with shared voting and shared dispositive power. The signatories certified the holdings were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control.
FMR LLC filed an amended Schedule 13G/A reporting beneficial ownership of 32,248,431 shares of TransAlta Corporation common stock, representing 10.9% of the class as of the event date 10/31/2025. The filing also lists Abigail P. Johnson as a reporting person.
FMR reports sole voting power over 32,097,880 shares and sole dispositive power over 32,248,431 shares. Ms. Johnson reports sole dispositive power over 32,248,431 shares and no voting power. The filers certify the shares were acquired and are held in the ordinary course and not for the purpose of changing or influencing control. One or more other persons may have rights to dividends or sale proceeds, but no such person holds more than five percent.
TransAlta Corporation filed a Form 6-K as a foreign private issuer for November 2025, signed by Executive Vice President Finance and Chief Financial Officer Joel Hunter on November 6, 2025. The filing includes an exhibit titled “TransAlta Announces President and CEO Succession”, indicating the company has announced a planned leadership transition at the president and chief executive officer level.
TransAlta Corporation filed a Form 6-K as a foreign private issuer to furnish additional financial information to investors. The filing attaches a Management’s Discussion and Analysis of Financial Condition and Results of Operations as Exhibit 99.2 and consolidated comparative interim unaudited financial statements as Exhibit 99.3, each covering the period ended Sept. 30, 2025. These documents are incorporated by reference into several existing TransAlta registration statements on Forms S-8 and F-10 under the U.S. Securities Act of 1933.
TransAlta Corp (TAC): Schedule 13G/A (Amendment No. 1) — FMR LLC and Abigail P. Johnson reported beneficial ownership of 22,621,020 common shares of TransAlta, representing 7.6% of the class as of 09/30/2025.
FMR LLC reports sole voting power over 22,461,169 shares and sole dispositive power over 22,621,020 shares; Abigail P. Johnson reports sole dispositive power over 22,621,020 shares and no voting power. The filing certifies the holdings were acquired and are held in the ordinary course and not for the purpose of changing or influencing control.
TransAlta Corporation furnished a Form 6-K for October 2025, indicating it files annual reports on Form 40-F. The report was signed by Executive Vice President Finance and Chief Financial Officer Joel Hunter on October 22, 2025. The submission includes Exhibit 99.1 titled "TransAlta Declares Dividends," providing an update on dividend actions via the accompanying exhibit.
TransAlta Corporation filed a Form 6-K as a foreign private issuer that files annual reports under Form 40-F. The report, signed by Executive Vice President Finance and Chief Financial Officer Joel Hunter on September 18, 2025, includes Exhibit 99.1 titled “TransAlta to Host 2025 Investor Day.”