Reliance Infrastructure Limited (R-Infra), formerly Reliance Energy Limited (REL) and Bombay Suburban Electric Supply (BSES), is an Indian private sector enterprise involved in power generation, infrastructure, construction and defence. It is part of the Reliance Anil Dhirubhai Ambani Group. The company is headed by its chairman, Anil Ambani, and chief executive officer, Punit Narendra Garg. The corporate headquarters is in Navi Mumbai. Reliance Infrastructure's interests are in the fields of power plants, metro rail, airports, bridges, toll roads, and defence. It is a major shareholder in the other group company, Reliance Power and Reliance Naval and Engineering Limited.

Reliance Group is an Indian conglomerate, headquartered in Mumbai, India. The company, which was formed after Dhirubhai Ambani's business was divided up, is headed by his younger son Anil Ambani. Reliance Group has five listed companies, Reliance Power, Reliance Infrastructure, Reliance Home Finance, and Reliance Health. The group provides financial services, construction, entertainment, power, health care, manufacturing, defence, aviation, and transportation services.