EDISON INTERNATIONAL

SCE supplies electricity to its customers through extensive transmission and distribution networks. Its transmission facilities, which are located primarily in California but also in Nevada and Arizona, deliver power from generating sources to the distribution network and consist of approximately 13,000 circuit-miles of lines ranging from 55 kV to 500 kV and approximately 80 transmission substations. SCE's distribution system, which takes power from distribution substations to customers, consists of approximately 38,000 circuit-miles of overhead lines, approximately 32,000 circuit-miles of underground lines and approximately 730 distribution substations.

At December 31, 2025, SCE had ownership interests in generating and energy storage facilities, primarily located in California, with approximately 7,000 MW of net physical capacity, of which SCE's pro-rata share is approximately 3,500 MW. SCE's pro rata share includes approximately 70 MW of capacity from facilities that were not operational or out of service at December 31, 2025 and excludes retired facilities. In addition, SCE owns two utility storage facilities in SCE’s service area with an aggregate capacity of 312.5 MW and a third 225 MW facility is expected to be in-service in 2026.

Certain of SCE's substations, and portions of its transmission, distribution and communication systems are located on lands owned by the federal, state or local governments pursuant to licenses, permits, easements or leases, or on public streets or highways pursuant to franchises. Certain of the documents evidencing such rights obligate SCE, under specified circumstances and at its expense, to relocate such transmission, distribution, and communication facilities located on lands owned or controlled by federal, state, or local governments.

SCE owns and operates hydroelectric plants and related reservoirs, which are located on private lands and U.S.-owned lands and are subject to FERC licenses. The majority of these plants have FERC licenses that expire at various times through 2046. FERC licenses impose numerous restrictions and obligations on SCE, including the right of the United States to acquire projects upon payment of specified compensation. When a FERC license expires, SCE must obtain a new license or shut down, and FERC may reissue the license, often with stricter conditions or award it to a competing applicant that offers a superior proposal. New FERC hydroelectric licenses generally impose stricter environmental requirements, longer and more structured pre-application processes, and greater stakeholder involvement compared to older licenses, reflecting updated laws that prioritize environmental protection and resource management. In addition, SCE expects additional opposition to new licenses by environmental stakeholder groups. If, in the future, SCE decides to, or is forced to, decommission one or more hydroelectric projects, the costs related to the decommissioning will be substantial. The CPUC approved SCE recovering a portion of estimated decommissioning costs for hydroelectric projects in the 2021 and 2025 GRCs. SCE intends to sell, subject to regulatory approval, a portion of its hydroelectric facilities comprising of approximately 17 MW of capacity by 2027.

Substantially all of SCE's properties are subject to the lien of a trust indenture securing first and refunding mortgage bonds. See "Notes to Consolidated Financial Statements—Note 5. Debt and Credit Agreements."