Executives Legend
The color legend to the right illustrates the various backgrounds for the top executives in the residential real estate industry.
Mark Lowham

Mark Lowham

CEO and Managing Partner, 
TTR Sotheby’s International Realty
2024 Rank: 138
As CEO of Washington, D.C.-based TTR Sotheby’s International Realty, Lowham oversees nearly 500 agents in 11 offices who do over $4.6 billion in annual sales. A graduate of Stanford University and a second-generation real estate professional, he also serves on the executive committee for Bright MLS.