15 CPW Births $75 M. Listing Linked to Pharma Kingpin

On Thursday, The Observer’s Web site reported that the city’s most expensive listing, an $80 million, 5,276-square-foot, 14-foot-tall, 9.5-room penthouse at Fifteen Central Park West, had come off the market. But the death of a gargantuan Fifteen Central Park West listing always means a fresh one has sprouted.

According to two sources, an 18th-floor duplex bought this March for only $23.5 million, with about 5,870 square feet indoors and 1,112 square feet of terrace space, is quietly asking $75 million. It’s next door to the better-known duplex that a biotechnology venture capitalist reportedly put on the market this year for $90 million.

(Both duplexes are chicly unofficial listings that don’t show up on popular real estate sites like StreetEasy. After last week’s disappearance of that $80 million penthouse, that Web site now shows a $30 million sprawl as the biggest available in the building.)

It’s not clear how long this new duplex has been asking $75 million, and the broker who is said to be handling it, Susan James, would not comment. The apartment was bought under the name Ullman Family Partnership, which bought a high-floor unit at Trump International for $8 million in 2003 and sold another there for $6.4 million in 2004.

New Jersey billing addresses and a signature on old deeds connect the Fifteen Central Park West duplex to the drug benefits mogul Richard O. Ullman. In 2002, he reportedly sold his National Prescription Administrators company to the country’s third largest drug benefits group for over $500 million.

mabelson@observer.com