2025 Sustainability Scorecard

Introduction Priority Topics Foundational Topics Appendix 1

Sustainability Goals Non-GAAP Reconciliation Sustainability Scorecard Definitions

Carbon-Free Electricity (% of retail sales)* 51 2 49 60 3 Better

Scope 1 Emissions (million metric tons CO2e) - Location-Based

1.2 1.1 0.6 Better

Note: All metrics reflect data associated with Edison International and its consolidated subsidiaries, with the exception of metrics denoted by (*), which reflect SCE data only. Trio's1 subsidiary Alfa Energy Ltd. workforce is based in the United Kingdom and does not track race/ethnicity data.

1. Trio operates under Edison Energy, LLC, an indirect, wholly-owned, non-utility subsidiary of Edison International, and is a global energy advisory firm providing integrated sustainability and energy solutions to commercial, industrial and institutional customers. Trio is not the same company as SCE, the utility, and Trio is not regulated by the CPUC.

2. Carbon-Free Electricity (% of retail sales) for data year 2023 has been updated from 52% to 51% to reflect revisions to inputs made after the 2023 Sustainability Report was published.

3. Certain 2025 data, as noted, is an estimate and includes as an input SCE's estimated 2025 delivered power mix using the methodology prescribed by the CEC PSDP as of April 2, 2026. SCE's final PSDP report will be filed with the CEC on June 1, 2026, and may include updates to the inputs used in these calculations.

4. RPS Compliance (% of retail sales) for data year 2023 has been updated from 40.8% to 40.4% to reflect revisions to inputs made after the 2023 Sustainability Report was published.

5. Approximately 38% of SCE's supply portfolio in 2024 came from renewable sources eligible under California's RPS, of which 35% was delivered to customers and 3% was sold for resale. With the use of excess procurement from prior years, as allowed under the RPS program, SCE met California's 44% RPS requirement for 2024. See Edison International's 2025 Form 10-K, Environmental Considerations, p. 135.

6. Unfavorable variance due to operational variability.

7. D.21-05-031 OP 1 mandates that energy efficiency goals be expressed using the Total System Benefits (TSB) metric. Starting in 2024, the TSB metric replaced energy and peak demand savings goals, except for savings from Codes and Standards efforts, which remains separate. This change aims to incentivize savings that provide the greatest system benefits over their lifecycle.

8. 2025 Customer Energy Efficiency metrics are estimates based on the best-available data at the time of report publication, due to a delay of other IOUs' information and their annual reports. Data may have a significant margin of error.

9. Performance trends reflect a maturing energy-efficient lighting market, where widespread adoption of code-compliant equipment limits incremental energy savings from additional replacements. While year-over-year results declined, program performance continues to exceed established goals, as reflected by achievement levels above 100%. Newly adopted codes and standards are not included in the 2025 Program Goal Scenario and will be reflected in future updates.

Introduction Priority Topics Foundational Topics Appendix 2

Sustainability Goals Non-GAAP Reconciliation Sustainability Scorecard Definitions

Board of Directors: Diverse Race/Ethnicity as % of Directors

36

36

27 Worse1

Board of Directors: Females as % of Directors 45 45 45 No change

Customers & Communities

Supplier Diversity Spend (billions $)*4 2.26 2.16 2.23 Better

Customer Satisfaction: JD Power & Associates

Board of Directors: Self-Identified LGBTQ+ as % of Directors

9 9 9 No change

Survey Results - Electric Residential (out of possible score of 1,000)*

N/A N/A 493 6

Customer Satisfaction: JD Power & Associates Survey Results - Electric Business (out of possible score of 1,000)*

N/A

N/A

627

-6

Nonprofit Organizations by Employees (millions $) Volunteer Hours

Note: All metrics reflect data associated with Edison International and its consolidated subsidiaries, with the exception of metrics denoted by (*), which reflect SCE data only. Trio's9 subsidiary Alfa Energy Ltd. workforce is based in the United Kingdom and does not track race/ethnicity data.

1. The year-over-year decrease reflects a change in Board composition following a director retirement and new appointment in 2025.

2. Representation as of Dec. 31 of the reporting year. Employee-related metrics exclude interns and those on a leave of absence. Part of Trio excluded from race/ethnic representation due to restrictive international reporting. Trio is not the same company as SCE, the utility, and Trio is not regulated by the CPUC.

3. Slight decrease in year-over-year percentage was due to changes within a smaller population. Minor changes to the number of females in total workforce can result in greater variability within the metric.

4. See General Order 156 2025 Annual Report / 2026 Annual Plan.

5. Supplier Diversity Spend Rate Percentage decreased from 2024 because although spending with diverse businesses grew, overall procurement spending grew at a higher rate.

6. JD Power revised its methodology in 2025; therefore, results are not comparable to 2024 or prior years.

7. 2025 total reflects contributions made by Edison International and the Edison International Foundation, and is inclusive of the company's volunteer grants and matching gifts.

8. In 2025, reported volunteer hours declined due to temporary operational factors, including disruptions following regional wildfire response efforts, a transition to a new reporting platform, and staffing changes within volunteer program coordination.

Introduction Priority Topics Foundational Topics Appendix 3

Sustainability Goals Non-GAAP Reconciliation Sustainability Scorecard Definitions

Operations & Environment

Number of Environmental-Related Noncompliance Events With Fine*

4

3

1 Better

Environmental-Related Settlements, Fines and Penalties ($)*

Consumptive Fresh Water Use - Fossil Fuel

$79,750 $5,100 $7,504 Worse3

Environmental-Related Inspections with No NOVs Issued (% of total inspections)*

97 98 98 No Change

Note: All metrics reflect data associated with Edison International and its consolidated subsidiaries, with the exception of metrics denoted by (*), which reflect SCE data only. Trio's4 subsidiary Alfa Energy Ltd. workforce is based in the United Kingdom and does not track race/ethnicity data.

1. Edison International's enterprisewide performance related to serious injuries, Days Away, Restrictions and Transfers (DART) rate and other safety metrics covering sprains, strains and related injuries slightly declined, but overall held steady in 2025. SCE has expanded its plan to target injuries among field employees that result in the most DART categories by engaging local leaders to create actions based on safety data. (See Employee & Contractor Safety.)

2. These outcomes reflect a combination of evolving risk conditions, operational changes to mitigate wildfire threats and the impacts of asset aging in specific portions of the system.

3. In 2025, SCE received an agency notification-related settlement, which carries higher preset penalties than typical violations.

4. Trio operates under Edison Energy, LLC, an indirect, wholly-owned, non-utility subsidiary of Edison International, and is a global energy advisory firm providing integrated sustainability and energy solutions to commercial, industrial and institutional customers. Trio is not the same company as SCE, the utility, and Trio is not regulated by the CPUC.

Introduction Priority Topics Foundational Topics Appendix 4

Sustainability Goals Non-GAAP Reconciliation Sustainability Scorecard Definitions

Includes federal and state regulated hazardous waste disposed of via landfill, incineration, wastewater treatment or chemical treatment. SONGS is included in this metric.

Female and/or diverse race/ethnicity as % of total number of directors (see "Workforce Development & Inclusion" metric definitions).

Renewable energy or other carbon-free resources, such as power from nuclear or large hydroelectric, calculated based on the California Energy Commission (CEC) Power Source Disclosure Program (PSDP) methodology for the Power Content Label as prescribed for each respective reporting year and as % of

retail sales.

Carbon dioxide equivalent (CO2e) emissions associated with electric power generation from all sources of SCE equity-owned generation and purchased power (specified and unspecified power purchases) delivered to electric power customers. The denominator includes electric power generation from all sources of SCE equity-owned generation and purchased power (specified and unspecified power purchases) delivered to electric power customers.

CO2e emissions associated with electric power generation from all sources of SCE equity-owned generation. The denominator includes electric power generation from all sources of SCE equity-owned generation delivered to electric power customers.

Consumptive water use is water removed from available supplies without return to a water resource system (e.g., water used in manufacturing, agriculture and food preparation that is not returned to a stream, river or water treatment plant). The rate of fresh water consumed for use in thermal generation. "Fresh water" includes water sourced from fresh surface water, groundwater, rainwater and fresh municipal water. It does not include recycled, reclaimed or gray water.

GWh % toward SCE energy savings goals from the Statewide Codes and Standards Program as adopted in CPUC decision 23-08-005 in 2023.

MW % of CPUC Goals Percentage toward SCE energy savings goals from the Statewide Codes and Standards Program as adopted in CPUC decision 23-08-005 in 2023.

Percentage achievement toward SCE's Total System Benefit (TSB) goal, a single goal metric that measures the total avoided cost value of energy efficiency. Adopted in CPUC decision 23-08-005 in 2023.

MW Demand Savings generated from achievements in the Statewide Codes and Standards program. Adopted in CPUC decision 23-08-005 in 2023.

Represents percent of employees who responded favorably to employee engagement-related questions in employee Pulse survey. The Pulse survey is voluntary and administered to all employees annually to measure their reactions to key aspects of the work environment, with approximately one-fourth of the employee population (enterprisewide) receiving the survey each quarter.

Percentage of regulatory agency inspections related to environmental compliance requirements that did not result in an issuance of Notices of Violation (NOVs) by the regulatory agency. NOVs are typically issued when the regulatory agency believes the recipient was noncompliant with one or more

regulatory requirements.

Payment made in response to an environmental-related noncompliance activity. Payment is attributed to the year in which the payment was made.

Nitrogen oxide (NOX) emissions rate associated with electric power generation includes Mountainview Generating Station, the five Peakers and Pebbly Beach Generating Station, using

U.S. Environmental Protection Agency (EPA) Part 75 Acid Rain reported values. NOX emissions rate associated with electric power generation from all sources of SCE equity-owned generation, using EPA Part 75 Acid Rain methodology.

Introduction Priority Topics Foundational Topics Appendix 5

Sustainability Goals Non-GAAP Reconciliation Sustainability Scorecard Definitions

NOX emissions rate associated with electric power generation from all sources of SCE equity-owned generation, using the EPA Part 75 Acid Rain methodology. The denominator includes electric power generation from all sources of SCE

equity-owned generation.

Number of noncompliant environmental-related permit events that required a payment by the regulatory agency.

Noncompliance event is attributed to the year in which the agency issued the letter or notice of noncompliance/violation.

Eligible renewable energy generation (or compliance credits) as prescribed by the CEC in its RPS Eligibility Guidebook, 10th Edition as a % of retail sales.

DART sum of work-related restricted duty and lost time injuries that result in at least one whole day away from work after the date of the incident calculated as (count of DART incidents x 200,000)/reported hours worked. Safety metrics reflect classification determinations made by mid-January for the year prior. Prior-year metrics are kept static for year-over-year comparison purposes.

Number of employee work-related deaths. Safety metrics reflect classification determinations made by mid-January for the year prior. Prior-year metrics are kept static for year-over-year comparison purposes.

Work-related injuries that result in at least one whole day away from work after the date of the incident, calculated as (count of injuries resulting in at least one lost workday x 200,000)/ hours

worked. Safety metrics reflect classification determinations made by mid-January for the year prior. Prior-year metrics are kept static for year-over-year comparison purposes.

Work-related injuries and illnesses (including lost time injuries) that result in loss of consciousness, restricted duty, job transfer, medical treatment beyond first aid, fatality or a significant injury or illness according to OSHA, calculated as (count of OSHA recordable injuries and illnesses x 200,000)/reported hours worked. Safety metrics reflect classification determinations made by mid-January for the year prior. Prior-year metrics are kept static for year-over-year comparison purposes.

Work-related incident that results in a fatality or a

life-threatening or life-altering injury, as defined by the Edison Electric Institute (EEI) Safety Classification and Learning (SCL) Model, adopted by SCE effective Jan. 1, 2025. Under the updated EEI definition, SIFs include: work-related fatalities, amputations involving bone (excluding distal phalanx), traumatic brain injury, intracranial bleeding, or loss of consciousness greater than 30 minutes, injury or trauma to vital organs (e.g., brain, spinal cord, heart, lungs, kidneys, liver), bone fractures requiring surgical repair (excluding fingers and toes), acute traumatic herniated disc with neurological deficit (sensory or motor).

Total company SIF rate as defined by EEI criteria, calculated as (count of serious injuries and fatalities x 200,000)/reported hours worked. Refer to "Safety: Employee Serious Injuries" for a description of EEI Serious Injury criteria. Safety metrics reflect classification determinations made by mid-January for the year prior. Prior-year metrics are kept static for year-over-year comparison purposes.

Individuals assigned to contracted work activities that may be high risk and, without implementation of appropriate safety measures, may be potentially hazardous or life threatening. Includes contractors managed by the decommissioning general contractor engaged by SCE to undertake a significant scope of decommissioning activities at SONGS. Safety metrics reflect classification determinations made by mid-January for the year prior. Prior-year metrics are kept static for year-over-year comparison purposes.

Number of contractor work-related serious injuries as defined by EEI criteria. Excludes contractors managed by the decommissioning general contractor engaged by SCE to undertake a significant scope of decommissioning activities at SONGS. Safety metrics reflect classification determinations made by mid-January for the year prior. Prior-year metrics are kept static for year-over-year comparison purposes.

Number of Tier 1 contractor work-related deaths. Excludes contractors managed by the decommissioning general contractor engaged by SCE to undertake a significant scope of decommissioning activities at SONGS. Safety metrics reflect classification determinations made by mid-January for the year prior. Prior-year metrics are kept static for year-over-year comparison purposes.

Tier 1 contractor work-related injuries and illnesses (including lost time injuries) that result in loss of consciousness, restricted duty, job transfer, medical treatment beyond first aid, fatality or a significant injury or illness according to OSHA. Excludes contractors managed by the decommissioning general contractor engaged by SCE to undertake a significant scope of decommissioning activities at SONGS. Safety metrics reflect classification determinations made by mid-January for the year prior. Prior-year metrics are kept static for year-over-year comparison purposes.

Introduction Priority Topics Foundational Topics Appendix 6

Sustainability Goals Non-GAAP Reconciliation Sustainability Scorecard Definitions

Number of Tier 1 contractor work-related serious injuries as defined by EEI criteria (refer to "Safety: Employee Serious Injuries"). Includes contractors managed by the decommissioning general contractor engaged by SCE to undertake a significant scope of decommissioning activities at SONGS. Safety metrics reflect classification determinations made by mid-January for the year prior. Prior-year metrics are kept static for year-over-year comparison purposes.

‌Scope 1 includes GHG emissions under the direct control of SCE, including UOG, stationary combustion (heating equipment, emergency generators), transportation (SCE-owned and/or operated fleet) and fugitives (refrigerants and sulfur hexafluoride (SF6) from transmission and distribution

(T&D) equipment).

Scope 2 includes indirect emissions required for business processes, including facility energy use (electricity) and T&D losses associated with all the power that flows across SCE's wires, including wheeled power.

Scope 3 includes indirect emissions released as a consequence of the activities of Edison International, including specified power purchases and unspecified power purchases, employee commuting and business travel, emissions from waste and wastewater and supply/value chain emissions associated with purchased goods and services, capital goods and upstream transportation and distribution.

SF6 emissions associated with SCE T&D equipment, as reported to the EPA.

SO2 emissions associated with electric power generation from all sources of SCE equity-owned generation, using EPA Part 75 Acid Rain methodology.

SO2 emissions rate associated with electric power generation from all sources of SCE equity-owned generation, using EPA Part 75 Acid Rain methodology. The denominator includes electric power generation from all sources of SCE

equity-owned generation.

SCE's total annual supplier diversity spend/total annual procurement spend. Diverse suppliers are defined by the CPUC's Supplier Diversity Program.

CAIDI is the average repair outage duration (in minutes) per SCE customer interruption (average time to restore service). Excludes major event days in alignment with Institute of Electrical and Electronics Engineers (IEEE) recommendations.

SAIDI is the cumulative duration (in minutes) of sustained repair outages experienced by the average SCE customer in a year. Excludes major event days in alignment with IEEE recommendations.

SAIFI is the number of sustained repair outages (power outage lasting longer than five minutes) experienced by the average SCE customer in a year. Excludes major event days in alignment with IEEE recommendations.

Number of employees leaving Edison International by voluntary (retirement), voluntary (other) or involuntary reasons during the reporting year divided by the total number of employees as of Dec. 31 of the reporting year.

Edison International Board of Directors.

Female and/or racially/ethnically diverse (i.e., not "white" and "male").

All races/ethnicities other than "white."

Officers and directors (Trio1 executives include officers only).

Principal managers, senior managers, managers, senior supervisors and supervisors (Trio leaders include directors).

All employees, including leaders and executives.

1 Trio operates under Edison Energy, LLC, an indirect, wholly-owned, non-utility subsidiary of Edison International, and is a global energy advisory firm providing integrated sustainability and energy solutions to commercial, industrial and institutional customers. Trio is not the same company as SCE, the utility, and Trio is not regulated by the CPUC.

Edison International | 2025 Sustainability Report | June 2026