This company reigns over tenants in multi-family settings. UDR (formerly United Dominion Realty Trust) is a real estate investment trust (REIT) that owns and operates more than 140 multi-family apartment communities with more than 51,000 units. Through joint ventures, it owns 37 more properties with nearly 10,000 units. It holdings are primarily located in fast-growing urban markets on both US coasts; more than half of its income comes from California, Washington, and metro Washington, DC. The acquisitive REIT's strategy is to continue to increase its presence in markets that have strong job growth, limited apartment supply, and high single-family home prices.