Greg Carr sold the gold‑domed penthouse at 170 Fifth Avenue in Flatiron District for $9 million on July 29, 2026, after 530 days on the market.
The 5,777‑square‑foot unit, originally listed for $25 million, sits atop the 13‑story Beaux‑Arts Sohmer Piano Building and boasts a two‑story octagonal dome with 360‑degree views of Manhattan.
Carr, a co‑founder of Boston Technology and philanthropist, said he sold the property after realizing his schedule in Africa and Idaho left little time for New York.
He pledged that all net proceeds would go to the Gorongosa Project, a conservation initiative that has received more than $100 million from his foundation over the past two decades.
The auction, run by Concierge Auctions as part of its "America 250" event, closed at $9 million, a 64 percent cut from the original asking price, and the sale marks a rare instance of a high‑end Manhattan home finding a buyer through live bidding.
CityRealty records show the buyer remains unnamed, and the transfer of title is expected to be finalized in the first quarter of 2027, with the proceeds earmarked for wildlife restoration in Mozambique. Local resident Maria Lopez remarked, "The sale reminds us that even iconic homes can change hands for the greater good."