Founded in 1977, Extra Space Storage is an American self-managed and self-administered real estate investment trust that provides self-storage units across the United States and Puerto Rico. The company manages 1,415 facilities and has a team of 3,209 employees. Extra Space Storage operates in three main segments: rental operations; development and acquisition; property management and tenant reinsurance. Headquartered in Cottonwood Heights, Utah, the company is the second biggest operator of self-properties in the USA. Included to the S&P 500 index, Extra Space Storage REIT share price (EXR) is set and traded on the New York Stock Exchange (NYSE).