Sotheby’s has been sued for allegedly failing to pay a $10.2 million commission tied to the $510 million sale of its former New York headquarters, according to a report by Artnet News. 

The lawsuit, filed April 9 in New York State Supreme Court by the real estate firm Cushman & Wakefield, centers on the auction house’s 2025 sale of its longtime home at 1334 York Avenue to Weill Cornell Medicine. The brokerage firm claims it helped secure the medical school as a tenant in 2023, a deal it says “laid the groundwork” for the eventual sale and triggered a contractual right to a 2 percent commission.