Major U.S. energy company owning Southern California Edison. Edison International is a leading American public utility holding company headquartered in Rosemead, California. The company principally owns Southern California Edison (SCE), which serves approximately 15 million people across a vast area of Central, Coastal, and Southern California. Edison International also operates unregulated energy services under the name Trio, providing sustainability, energy advisory, decarbonization, renewable energy procurement, energy optimization, and transportation electrification services to commercial and institutional clients. Founded in 1886, Edison International has been a key player in the nation’s energy sector, with long-standing involvement in grid modernization, clean energy transition, and customer-centric innovation. As of December 31, 2024, the company employs roughly 14,013 people.