Sotheby’s stiffed Cushman & Wakefield on a $10 million commission tied to the auction house’s blockbuster Upper East Side headquarters sale, the brokerage claims.
In a lawsuit filed Thursday in New York State Supreme Court, Cushman accuses Sotheby’s of breaching a commission agreement connected to the October 2025 sale of 1334 York Avenue to Weill Cornell Medicine.
Cushman claims it spent years brokering a 200,000-square-foot lease at the building on behalf of Weill Cornell that ultimately paved the way for the $510 million sale. At the time of the 2023 lease signing, Cushman says both sides inked a separate agreement entitling the firm to a 2 percent commission on any sale to Weill Cornell during the 30-year lease term.
But Sotheby’s never informed the brokerage it was weighing a sale a few years later, the complaint alleges, and Cushman first learned of the deal through news reports. The brokerage sent Sotheby’s a $10.2 million commission bill in December, but the brokerage refused to pay it, “choosing instead to retain those funds to address its deteriorating financial condition,” the suit alleges.
“This lawsuit is baseless and completely meritless,” said a Sotheby’s spokesperson in a statement. “We will defend ourselves vigorously in court and we are confident that when the facts come out, we’ll be vindicated.”
News reports at the time of the sale credited JLL’s David Giancola, Geoff Goldstein and Steve Klein with representing Weill Cornell in the sale and CBRE’s Doug Middleton and Mary Ann Tighe with advising Sotheby’s.
The complaint paints a picture of a financially strained Sotheby’s seeking to shed debt tied to the property, including a $175 million mortgage. Cushman says the lease it arranged with Weill Cornell was “a financial life-preserver to Sotheby’s” that boosted the property’s value and ultimately helped Sotheby’s command a hefty sale price; the building traded for almost 40 percent more than the auction house paid in 2009.
Sotheby’s itself acknowledged the financial upside. Following the sale, Sotheby’s CEO Charles F. Stewart told staff in an e-mail the move would be “very financially beneficial,” noting proceeds would be used to reduce debt and fund investments, according to an article from the trade publication The Art Newspaper cited in the lawsuit.
The transaction capped a run of real estate moves by the auction house. In 2023, Sotheby’s bought the landmark Breuer Building from the Whitney for about $100 million, a year after it picked up a converted office building in Long Island City for $82 million.
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