Key Takeaways

• Ares Infrastructure funds purchased 49% of TransAlta’s operating 500 MW Oklahoma wind portfolio.
• TransAlta received $305 million before customary closing adjustments.
• TransAlta retains majority ownership and operational oversight.
• The portfolio comprises three facilities with long-term contracts.

On October 22, 2026, TransAlta confirmed it had completed the sale of a 49% minority interest in its 500 MW Oklahoma wind portfolio to Ares Infrastructure funds for $305 million in cash, before closing adjustments. This is a sale of an ownership stake in existing generation, not construction of an additional 500 MW.

Three Oklahoma Wind Farms

The portfolio comprises White Rock West (100 MW), White Rock East (200 MW), and Horizon Hill (200 MW). Together, their nameplate capacity totals 500 MW. The 49% ownership interest does not change the turbines’ physical capacity.

TransAlta keeps its controlling 51% interest and will oversee operations through a long-term asset-management agreement. The transaction was also documented by the seller’s transaction counsel. For background on the difference between power capacity and actual output, see our capacity-factor explainer.

Financial Details and Power Demand

TransAlta expects the three assets to produce approximately $60 million in adjusted EBITDA during 2026. At 49%, that represents about $29 million attributable to the minority interest. This is a company forecast, not a confirmed annual result. Long-term contracts support the portfolio, while production tax credits are scheduled to expire in 2034.

The company said the proceeds support its balance sheet and future opportunities, including the Centralia conversion and Alberta data-center projects. The deal follows a wider pattern of investments in operating power assets, including Enel’s 270 MW solar acquisition. Our older renewable-energy and Bitcoin-mining report provides additional historical context.

What Comes Next

Ares gains a minority position in contracted wind generation while TransAlta retains day-to-day oversight. Investors will watch actual generation, contracted revenues and post-2034 tax-credit economics. For direct documentation, consult the SEC-filed company announcement.

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