• Emanuel Stern, the son of billionaire real estate tycoon Leonard Stern and president of his father's Hartz Mountain Industries, has sold the 6,500-square-foot home in Bridgehampton that he shares with wife Elizabeth for $8.5 million. [Newsday]
• Risa Meyer, the daughter of late socialite and philanthropist Kitty Meyer and founder of the online party-goods store PlumParty.com, has put her three-bedroom condo at Trump Parc East on the market for $14.8 million. [Cityfile, Stribling]
• Real estate developer Hunter Lipton and his wife, Tara, have paid $4.6 million for a third-floor apartment at 255 East 74th Street. [Cityfile]