The most expensive home sale in recorded history didn’t happen in Manhattan or Beverly Hills. It happened in a 19th-century Georgian mansion tucked inside the grounds of a London military hospital — and the man who wrote the check is a billionaire most Americans have never heard of.
Suneil Setiya, co-founder of the London-based quantitative trading powerhouse Quadrature Capital, has been identified as the buyer of Providence House in Chelsea, according to the Financial Times. The estate is a sprawling Grade II-listed estate that recently traded for north of $350 million — a figure that rewrites the record books and leaves every previous luxury home sale in the dust.
The deal, first reported earlier this month without a named buyer, blows past the previous global benchmark: the $238 million that hedge fund titan Ken Griffin shelled out in 2019 for a New York penthouse that was, until now, the gold standard of obscene real estate spending.
Sitting on a 2-acre plot within the Royal Hospital Chelsea, Providence House — once known as Gordon House — commands sweeping views of the River Thames and claims the largest private garden in central London outside of Buckingham Palace.
The grounds include a private lake. Below grade, there’s a full underground swimming pool. The mansion also reportedly houses a panic room, a private cinema complete with a “Candy bar” pick ‘n’ mix concession and a greenhouse — all while preserving its original Georgian bones.
“It had never been marketed for sale,” one real estate agent told the Financial Times, meaning Setiya and his representatives came to the owner directly.
Setiya, who co-founded Quadrature Capital in 2010 alongside partner Greg Skinner — both veterans of D.E. Shaw and quant research firm G-Research — runs one of the most profitable and least-publicized trading firms in the world.
The company, headquartered in London’s landmark Leadenhall Building, saw revenues explode nearly fivefold to roughly $1.53 billion between 2020 and 2024. Last year alone, it paid its owners a dividend equivalent to approximately $459 million.
A spokesperson for Quadrature told the Financial Times that Setiya does not comment on personal matters.
Despite the firm’s low profile, its political footprint is hard to miss. Quadrature donated roughly $5.1 million to Britain’s Labour Party (similar to the democratic party in the US) ahead of the 2024 general election — the single largest donation Labour has ever received — citing what it called the “urgently needed” green transition.
Setiya himself topped the Sunday Times Giving List in 2025, donating 13.8% of his estimated $1.25 billion fortune to philanthropic causes. He and Skinner pushed roughly $344 million through their Quadrature Climate Foundation last year, directing major gifts to organizations including the Arctic Basecamp, the African Climate Foundation and the World Wide Fund for Nature.
“We are passionate about supporting causes that address poverty, inequality and human suffering,” the two men said in a joint statement last year.
The seller, Nick Candy, is one half of the Candy brothers — the British developer duo who built their fortunes on One Hyde Park, the Knightsbridge ultra-luxury tower that became a global symbol of excess and a favored address for oligarchs, celebrities and the international super-wealthy.
Candy’s brother Christian originally acquired the property in 2012 for approximately $95.6 million, later transferring ownership to Nick, according to court documents obtained by the Times. The mansion was held through Providence House LLP, with Nick Candy listed as its sole beneficial owner.
The sale comes as Candy’s personal life has faced significant turbulence. His spokesperson confirmed last year that he and his wife, Australian actress and singer Holly Valance, are divorcing. Both remain listed as directors of the LLP that owned the property. On Sunday, Valence was spotted kissing her new flame — her former bodyguard.
Candy himself, meanwhile, has undergone a political transformation of his own. A former donor to Britain’s Conservative Party, he defected to Nigel Farage’s Reform UK party in 2025, taking on the role of party treasurer and spearheading fundraising operations that have drawn in former Tory donors. He was present at a December meeting at President Donald Trump’s Mar-a-Lago resort in Florida between Farage and Elon Musk.
Candy was not immediately available for comment.
He isn’t walking away from the luxury market entirely. His penthouse at One Hyde Park — a five-bedroom, eight-bathroom duplex with unobstructed views over Hyde Park, wraparound terraces and Jacuzzi-style jet pools — remains on the market with an asking price of approximately $223 million.
The stamp duty alone on the transaction — Britain’s equivalent of a transfer tax — is estimated at roughly $40.4 million, assuming the property serves as Setiya’s primary residence and he owns additional properties.
The previous British record had been held by a Knightsbridge address acquired in 2020 for approximately $268 million by Hui Ka Yan, the founder of Chinese property giant Evergrande Group, which was subsequently liquidated in 2024.
