[6-K] TRANSALTA CORP Current Report (Foreign Issuer)

Rhea-AI Filing Summary

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.

Insights

Equity and infrastructure analyst

TransAlta discloses a planned 310 MW Ontario gas portfolio acquisition for $95 million.

The Form 6-K from TransAlta Corporation highlights an exhibit describing a planned acquisition of a 310 MW contracted Ontario gas portfolio for $95 million. While the filing excerpt does not provide further terms, this points to an increase in TransAlta's gas-fired generation footprint within a contracted framework.

The fact that the portfolio is described as "contracted" is important, as such assets typically involve power purchase or similar agreements, which can provide more predictable cash flows compared with purely merchant generation. However, the specific contract counterparties, tenors, and pricing are not detailed here, so the financial impact cannot be quantified from this excerpt alone.

Overall, this appears to be a strategic asset addition rather than a routine administrative item. The actual effect on earnings, leverage, and risk will depend on the acquisition structure and contract terms, which would be expected to appear in the full exhibit 99.1 and subsequent company disclosures.

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of November 2025

Commission File Number: 001-15214

TransAlta Corporation
(Translation of registrant's name into English)

Suite 1400, 1100 – 1st Street S.E., Calgary, Alberta, T2G 1B1
(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.
Form 20-F [   ]      Form 40-F [ X ]

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		TransAlta Corporation
		(Registrant)
Date: November 17, 2025		/s/ Joel Hunter
		Joel Hunter
		Executive Vice President Finance and Chief Financial Officer

EXHIBIT INDEX

Exhibit Number		Description
99.1		TransAlta to Acquire 310 MW Contracted Ontario Gas Portfolio for $95 Million

FAQ

What did TransAlta Corporation (TAC) report in its November 2025 Form 6-K?

TransAlta Corporation filed a Form 6-K for the month of November 2025, signed by Executive Vice President Finance and Chief Financial Officer Joel Hunter, and furnished an exhibit describing a planned acquisition of a 310 MW contracted Ontario gas portfolio for $95 million.

What acquisition is mentioned in TransAlta Corporation (TAC)'s latest Form 6-K?

The exhibit titled "TransAlta to Acquire 310 MW Contracted Ontario Gas Portfolio for $95 Million" indicates that TransAlta plans to acquire a contracted natural gas power portfolio in Ontario with 310 MW of capacity for a purchase price of $95 million.

How large is the gas portfolio TransAlta (TAC) plans to acquire in Ontario?

The exhibit description states that TransAlta plans to acquire a contracted Ontario gas portfolio with a capacity of 310 megawatts (MW).

What is the value of TransAlta Corporation (TAC)'s planned Ontario gas portfolio acquisition?

The exhibit identifies a purchase price of $95 million for the acquisition of the 310 MW contracted Ontario gas portfolio.

Who signed TransAlta Corporation (TAC)'s November 2025 Form 6-K?

The Form 6-K was signed on behalf of TransAlta Corporation by Joel Hunter, who is the Executive Vice President Finance and Chief Financial Officer.

What type of filer is TransAlta Corporation (TAC) under U.S. securities rules?

The Form 6-K indicates that TransAlta Corporation files its annual reports under cover of Form 40-F, consistent with its status as a Canadian foreign private issuer.