Billionaire Julia Koch sells home in NYC’s most exclusive co-op building for $45M admin 4 days ago Pinoy Tv Comments Off on Billionaire Julia Koch sells home in NYC’s most exclusive co-op building for $45M 0 Views John D. Rockefeller, financier Saul Steinberg and Blackstone’s Stephen Schwarzman all called the same unit at 740 Park Ave. their home. Share Facebook Twitter Stumbleupon LinkedIn Pinterest