Douglas Elliman Inc.
A luxury residential real estate brokerage focused on major U.S. markets, Douglas Elliman pairs roughly 5,800 agents across more than a hundred offices with title, escrow, mortgage, and new-development marketing services. It was founded in 1911 by Douglas L. Elliman, who famously started the firm in a basement store on Madison Avenue. The company later briefly operated as "Prudential Douglas Elliman" before reclaiming its founder's name in 2012.