Headquartered in Las Vegas, Nevada, NV Energy, Inc. is a holding company with principal subsidiaries, Nevada Power Company an ... d Sierra Pacific Power Company, doing business as NV Energy. Serving a combined 45,592-square-mile service territory, NV Energy provides a wide range of energy services and products to approximately 2.4 million citizens of Nevada and nearly 40 million tourists annually. Keep up with NV Energy at Facebook.com/NVEnergy and Twitter.com/NVEnergy. read more