CONSTELLATION ENERGY GENERATION LLC

There have been no changes in the properties that were owned as of December 31, 2025 and disclosed within ITEM 2. PROPERTIES of our 2025 Form 10-K. The following table presents our interests in net electric generating capacity by station as of March 31, 2026, for those acquired from Calpine.

(a)100%, unless otherwise indicated.

(b)Baseload units are those that normally operate to take all or part of the minimum continuous load of a system and, consequently, produce electricity at an essentially constant rate. Intermittent units are those with output controlled by the natural variability of the energy resource rather than dispatched based on system requirements. Intermediate units are those that normally operate to take load of a system during the daytime higher load hours and, consequently, produce electricity by cycling on and off daily. Peaking units consist of lower-efficiency, quick response steam units, gas turbines and diesels normally used during the maximum load periods.

(c)Net generation capacity is stated at proportionate ownership share. All facilities reflect a summer rating.

(d)These stations are pending divestiture as part of the regulatory requirements for the acquisition of Calpine that closed in January 2026 and the associated balances are classified as Assets held for sale in the Consolidated Balance Sheets. See Note 2 — Mergers, Acquisitions, and Dispositions of the Combined Notes to Consolidated Financial Statements for additional information.

The net generation capability available for operation at any time may be less due to regulatory restrictions, transmission congestion, fuel restrictions, efficiency of cooling facilities, level of water supplies, or generating units being temporarily out of service for inspection, maintenance, refueling, repairs, or modifications required by regulatory authorities.

The following table presents our estimated net generation capacity by station for projects under construction at March 31, 2026, each of which is wholly owned by us unless otherwise noted.

(a)The estimated net generation capacity for units under construction is approximate until commercial operation commences and applicable confirmatory testing is completed.

(b)Commercial operation was in April 2026. Additionally, in May 2026, we sold a 25% ownership interest in the facility to an unrelated party. The sale did not have a material impact on our results of operations or financial condition.

(c)Pastoria Solar was commissioned in April 2026.