Gibson Sotheby’s International Realty Acquires Madden Group

Acquisition of New Hampshire Brokerage Establishes Firm’s First Office Outside Massachusetts Nicole Rideout Hartwick, Larry Rideout, Jenn Madden, Colleen Barry Gibson Sotheby’s International Realty, a leading New England real estate brokerage, announced today its acquisition of Madden Group, a boutique brokerage serving New Hampshire’s Seacoast and surrounding markets, along with the opening of a new …

The Sotheby’s International Realty Brand Outpaces the Industry, Tripling the U.S. Sales Volume Growth Average

Global Sales Volume Also Increased 16% YOY as Luxury Real Estate Brand Marks Its 50th Anniversary The Sotheby's International Realty® brand announced that its 2025 U.S. sales volume increased 9.3% year over year—more than triple the National Association of REALTORS® reported overall market growth of 2.6%. Globally, the brand achieved $182.4 billion in sales volume in …