EDISON INTERNATIONAL

Wildfire Related Regulatory Proceedings

In response to the increase in wildfire activity and faster progression of and increase in damage from wildfires across SCE's service area and throughout California, SCE has incurred wildfire mitigation and wildfire and drought restoration related spending at levels exceeding amounts authorized in SCE's GRCs. For regulatory proceedings related to the 2017/2018 Wildfire/Mudslide Events, see "Management Overview—Southern California Wildfires and Mudslides."

2024 Multi-year Wildfire Mitigation and Catastrophic Events Filing ("2024 WMCE Filing")

In December 2025, SCE filed its 2024 WMCE Filing, seeking to recover incremental operating and maintenance expenses of $55 million and incremental capital expenditures of $78 million, recorded in the wildfire risk mitigation balancing account, as well as incremental storm-related costs associated with certain 2017 – 2021 events recorded in the catastrophic event memorandum account. The application also seeks recovery of $36 million in wildfire mitigation related capital expenditures incurred in 2022 that were previously denied without prejudice and permitted to be included in base rates as part of the post-test year ratemaking mechanism, see "—2021 GRC Wildfire Mitigation Memorandum Account Balances" for further discussion. SCE proposed a procedural schedule with the final decision in December 2026.

2023 Multi-year Wildfire Mitigation and Catastrophic Events Filing ("2023 WMCE Filing")

In June 2025, the CPUC approved a settlement agreement among SCE, Cal Advocates, and Small Business Utility Advocates in the WMCE proceeding under which SCE is authorized to recover $702 million in capital expenditures and $308 million in operation and maintenance expenses. This resulted in an initial revenue requirement of $314 million, which has been implemented into customer rates over a 12-month period starting October 1, 2025, along with ongoing capital revenue requirement and interest.

2021 GRC Wildfire Mitigation Memorandum Account Balances

In June 2025, the CPUC issued a final decision that authorized recovery of $291 million in operations and maintenance expenses and $99 million in capital expenditures. The portion of the initial revenue requirement above the interim rate recovery levels has been implemented in customer rates over a 12-month period starting October 1, 2025, along with ongoing capital revenue requirement and interest. Additionally, the final decision disallowed recovery of $65 million in operations and maintenance expenses, and determined that $36 million of requested capital expenditures were not eligible for recovery as part of this proceeding. SCE has filed an application for rehearing with the CPUC regarding the disallowances in this decision.

NextGen Enterprise Resource Planning ("ERP") Program

In March 2025, SCE filed an application with the CPUC seeking funding for the replacement of its core ERP system that has been in service for over 15 years and will soon reach the end of its service life. SCE requested funding through a balancing account of recorded and forecast capital expenditures of approximately $1.1 billion and operations and maintenance expenditures of $239 million. SCE anticipates a proposed decision will be issued by the CPUC in 2026.

2026 FERC Formula Rate Annual Update

In November 2025, SCE filed its 2026 annual transmission revenue requirement update with the FERC, with rates effective January 1,2026. The update reflects a 2026 transmission revenue requirement of$1.5 billion, which is a $157 million, or 12%, increase from the 2025 annual rates. The increase is primarily due to 2026 rates reflecting recovery of previous undercollections.