BILLIONAIRE NEIGHBOR ALERT: Live Next Door to Ajay Gupta in Miami's Ultimate Mansion in the Sky. Penthouse 401 at Waldorf Astoria Residences Miami — a half-floor sky mansion in Cube 9, beside Ajay Gupta's own residence at the very top of the Penthouse Collection. 6,597 SF, 4 BR / 5.5 BA, private elevator, 13-foot ceilings, private pool, and 613 SF Sky Conservatory. Sweeping NE views of Miami Beach, Biscayne Bay, the Atlantic, and the downtown skyline. BAMO interiors. Wolf & Sub-Zero. Italian cabinetry. Exclusive 5-star beach club with Major Food Group, helicopter access, Peacock Alley, Michelin-star dining. Imagine living next to Ajay Gupta — the ultimate proximity — for under $25M. Truly a one-of-a-kind mansion in the sky. Offered at $24,350,000. 96% sold. Topping off now, completion early 2028.