• Marty Sprinzen, the founder of Forte Software, which was sold to Sun Microsystems for $540 million in 1999, has put his 4,552-square-foot apartment at 838 Fifth Avenue up for sale. The ninth-floor residence, which was once owned by Lily Safra and is one floor below the apartment Jimmy Nederlander bought in 2006—is now on the market for $24.5 million. [Cityfile, BHS]
• Seymour Zises, founder of the investment advisory firm Family Management, and his wife Cathy, have gone into contract to sell their second-floor apartment at 1016 Fifth Avenue. The five-bedroom co-op had most recently been listed for $10.95 million. [Cityfile, Stribling]
• William Little Jr., the chairman of George Little Management, the trade show production company founded by his father, has paid $6.64 million for a 16th-floor apartment at 170 East End Avenue. [Cityfile]