Yes, the major utility corporation known as Edison International is headquartered in Rosemead, California, within the United States, and its primary operating subsidiary, Southern California Edison, provides electricity exclusively to millions of residential, commercial, and industrial customers across Central, Coastal, and Southern California. While there are other historical or international entities sharing the name—such as the Italian energy firm Edison S.p.A.—the major publicly traded corporate entity most frequently discussed in American financial markets is thoroughly rooted in the United States. Its entire physical infrastructure, customer service footprint, regulatory compliance framework, and operational assets are strategically concentrated within the American energy grid system, specifically operating under the jurisdiction of state and federal regulatory commissions.