Blackstone Acquisition of 550 Madison Avenue

New York, NY, United States

550 Madison Avenue is a landmark Class A office tower in Midtown Manhattan, originally designed by Philip Johnson and John Burgee for AT&T and later serving as Sony's U.S. headquarters. The property features a distinctive Chippendale-style roof, a newly renovated lobby, and a public atrium with food stalls, following a $300 million redevelopment led by the Olayan Group. Its prime location at Madison Avenue and 56th Street places it among New York's most prestigious commercial corridors, surrounded by luxury retail and major office towers. As of 2025, the building is nearly fully leased to high-profile tenants and stands as a premier destination for global corporations.