Talen Energy Corp 10-K

ITEM 2. PROPERTIES GENERATION FLEET AS OF DECEMBER 31, 2025 Generation Facility MW Capacity (a) Percentage Ownership MW Ownership Fuel Type Plant Type State PJM Susquehanna (b) 2,494 90 % 2,245 Nuclear Baseload PA Guernsey 1,771 100 % 1,771 Natural Gas Baseload OH Martins Creek 1,710 100 % 1,710 Natural Gas/Fuel Oil Peaker PA Montour 1,505 100 % 1,505 Natural Gas Peaker PA Brunner Island (c) (d) 1,419 100 % 1,419 Natural Gas/Coal Intermediate PA Brandon Shores (e) 1,273 100 % 1,273 Coal RMR MD Freedom 1,049 100 % 1,049 Natural Gas Baseload PA H.A. Wagner (e) 702 100 % 702 Fuel Oil RMR MD Lower Mt. Bethel 607 100 % 607 Natural Gas Baseload PA Conemaugh (b) (d) 1,763 22.22 % 392 Coal Intermediate PA Keystone (b) (d) 1,724 12.34 % 213 Coal Intermediate PA Total 16,017 12,886 WECC Colstrip Unit 3 (b) 740 30 % 222 Coal Baseload MT Total 740 222 Generation Fleet 16,757 13,108 __________________ (a) Generation capacity (summer rating, where applicable) is based on factors, among others, such as operating experience and physical conditions, which may be subject to revision. (b) See Note 7 to the Annual Financial Statements for additional information on jointly owned facilities. (c) Coal-fired electric generation is restricted during the EPA Ozone Season, which is May 1 to September 30 of each year. (d) Coal-fired electric generation is required to cease at Brunner Island by December 31, 2028 and at Keystone and Conemaugh by December 31, 2034. (e) See Note 3 to the Annual Financial Statements for additional information on the Brandon Shores and H.A. Wagner RMR arrangements.