Talen Energy Reports PJM Auction Results for the 2027/2028 Planning Year (Form 8-K)

Talen Energy Reports PJM Auction Results for the 2027/2028 Planning Year

HOUSTON, December 17, 2025 - Talen Energy Corporation ("Talen," "we," or "our") (NASDAQ: TLN), a leading independent power producer, today reported its results from the PJM Base Residual Auction for the 2027/2028 planning year. Talen cleared a total of 8,745 megawatts at a clearing price of $333.44 per megawatt-day across the PJM Interconnection Regional Transmission Organization, equating to approximately $1,067 million in capacity revenues for the 2027/2028 planning year. The planning year runs from June 1, 2027, through May 31, 2028.

About Talen

Talen Energy (NASDAQ: TLN) is a leading independent power producer and energy infrastructure company dedicated to powering the future. We own and operate approximately 13.2 gigawatts of power infrastructure in the United States, including 2.2 gigawatts of nuclear power and a significant dispatchable fossil fleet. We produce and sell electricity, capacity, and ancillary services into wholesale U.S. power markets, with our generation fleet located in the Mid-Atlantic, Ohio and Montana. Our team is committed to generating power safely and reliably, delivering the most value per megawatt produced. Talen is also powering the digital infrastructure revolution. We are well-positioned to serve this growing industry, as artificial intelligence data centers increasingly demand more reliable, clean power. Talen is headquartered in Houston, Texas. For more information, visit https://www.talenenergy.com/.

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