Exhibit 21.1

Subsidiaries of Talen Energy Corporation

The following is a list of the subsidiaries of Talen Energy Corporation as of June 20, 2024.

Name	Jurisdiction
Brandon Shores Battery Storage LLC	Delaware
Brandon Shores LLC	Delaware
Brunner Island, LLC	Delaware
Brunner Island Services, LLC	Pennsylvania
Camden Plant Holding, L.L.C.	Delaware
Colstrip Comm Serv, LLC	Delaware
Cumulus Battery Storage Holdings LLC	Delaware
Cumulus Coin LLC	Delaware
Cumulus Coin Holdings LLC	Delaware
Cumulus Compute Holdings LLC	Delaware
Cumulus Data LLC	Delaware
Cumulus Data Holdings LLC	Delaware
Cumulus Digital LLC	Delaware
Cumulus Digital Holdings LLC	Delaware
Cumulus Growth Holdings LLC	Delaware
Cumulus Real Estate Holdings LLC	Delaware
Cumulus Renewables Holdings LLC	Delaware
Cumulus Texas Renewables LLC	Delaware
Dartmouth Plant Holding, LLC	Delaware
Dartmouth Power Associates Limited Partnership	Massachusetts
Dartmouth Power Generation, L.L.C.	Delaware
Dartmouth Power Holding Company, L.L.C.	Delaware
Elmwood Park Power, LLC	Delaware
Fort Armistead Road – Lot 15 Landfill, LLC	Delaware
H.A. Wagner LLC	Delaware
Holtwood, LLC	Delaware
Lady Jane Collieries, Inc.	Pennsylvania

Liberty View Power, L.L.C.	Delaware
LMBE Project Company LLC	Delaware
Lower Mount Bethel Energy, LLC	Delaware
Martins Creek, LLC	Delaware
MC OpCo LLC	Delaware
MC Project Company LLC	Delaware
Montana Growth Holdings LLC	Delaware
Montour, LLC	Delaware
Montour Services, LLC	Pennsylvania
Morris Energy Operations Company, LLC	Delaware
Newark Bay Cogeneration Partnership, L.P.	New Jersey
Newark Bay Holding Company, L.L.C.	Delaware
Noria Hondo Solar LLC	Delaware
NorthEast Gas Generation Holdings, LLC	Delaware
Pennsylvania Mines, LLC	Delaware
Raven FS Property Holdings LLC	Delaware
Raven Lot 15 LLC	Delaware
Raven Power Finance LLC	Delaware
Raven Power Fort Smallwood LLC	Delaware
Raven Power Generation Holdings LLC	Delaware
Raven Power Group LLC	Delaware
Raven Power Property LLC	Delaware
RMGL Holdings LLC	Delaware
Sapphire Power Generation Holdings LLC	Delaware
Silverthorn Solar LLC	Delaware
Susquehanna Nuclear, LLC	Delaware
Talen Conemaugh LLC	Delaware
Talen Energy Marketing, LLC	Pennsylvania

2

Talen Energy Services Group, LLC	Delaware
Talen Energy Services Holdings, LLC	Delaware
Talen Energy Supply, LLC	Delaware
Talen Generation, LLC	Delaware
Talen KeyCon Holdings LLC	Delaware
Talen Keystone LLC	Delaware
Talen Land Holdings, LLC	Pennsylvania
Talen MCR Holdings LLC	Delaware
Talen Montana, LLC	Delaware
Talen Montana Holdings, LLC	Delaware
Talen NE LLC	Delaware
Talen Technology Ventures LLC	Delaware
Talen Treasure State, LLC	Delaware
The Riverlands Recreation Area LLC	Delaware
Wagner Battery Storage Two LLC	Delaware
York Plant Holding, LLC	Delaware

3