The much sought-after 529 Broadway, a two-story building on the northwest corner of Spring Street, has been sold for $150 million to Jeff Sutton, Joe Sitt’s Thor Equities, the Adjmi family and Bobby Cayre’s Aurora Capital. The 22,500-square-foot property, the subject of an off-market bidding war, will be emptied and razed. A new jewel box flagship designed by BKSK Architects of between 40,000 and 50,000 square feet will be built on the site, sources said.