STOCK TITAN

TRANSALTA CORP SEC Filings

TAC NYSE

Welcome to our dedicated page for TRANSALTA SEC filings (Ticker: TAC), 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.

Our SEC filing database is enhanced with expert analysis from Rhea-AI, providing insights into the potential impact of each filing on TRANSALTA's stock performance. Each filing includes a concise AI-generated summary, sentiment and impact scores, and end-of-day stock performance data showing the actual market reaction. Navigate easily through different filing types including 10-K annual reports, 10-Q quarterly reports, 8-K current reports, proxy statements (DEF 14A), and Form 4 insider trading disclosures.

Designed for fundamental investors and regulatory compliance professionals, our page simplifies access to critical SEC filings. By combining real-time EDGAR feed updates, Rhea-AI's analytical insights, and historical stock performance data, we provide comprehensive visibility into TRANSALTA's regulatory disclosures and financial reporting.

Filing
Rhea-AI Summary

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.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-- %
Tags
other
-
Rhea-AI Summary

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.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-- %
Tags
other
-
Rhea-AI Summary

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.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-11.44%
Tags
current report
Rhea-AI Summary

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.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-11.44%
Tags
current report
-
Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-11.44%
Tags
current report
-
Rhea-AI Summary

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.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-- %
Tags
other
Rhea-AI Summary

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.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
2.99%
Tags
current report
-
Rhea-AI Summary

TransAlta Corporation submitted a Form 6-K as a foreign private issuer. The filing is administrative and primarily points to an exhibit titled “TransAlta to Host Third Quarter 2025 Results Conference Call,” indicating preparation to discuss its third-quarter 2025 results with investors.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-0.06%
Tags
current report
-
Rhea-AI Summary

Bank of Nova Scotia reported beneficial ownership of 13,865,341 shares of TransAlta Corp., representing 4.67% of the outstanding common stock as of 09/30/2025. The filing, submitted as a Schedule 13G/A, shows the bank holds sole voting and sole dispositive power over these shares and classifies itself as a parent holding company. The report states the ownership is below the 5% threshold for required Schedule 13D treatment, and no group members, subsidiaries, or additional parties are identified as holding or acquiring the securities on the bank’s behalf. The signing official certifies comparability of foreign regulatory oversight and agrees to provide additional disclosure to the Commission if requested.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-- %
Tags
other
Rhea-AI Summary

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.”

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
1.26%
Tags
current report

FAQ

How many TRANSALTA (TAC) SEC filings are available on StockTitan?

StockTitan tracks 56 SEC filings for TRANSALTA (TAC), including 10-K annual reports, 10-Q quarterly reports, 8-K current reports, and Form 4 insider trading disclosures. Each filing includes AI-generated summaries, impact scoring, and sentiment analysis.

When was the most recent SEC filing for TRANSALTA (TAC)?

The most recent SEC filing for TRANSALTA (TAC) was filed on November 13, 2025.