Dell Technologies founder and CEO Michael Dell was the buyer behind the $100.47 million purchase of a penthouse on Manhattan’s Billionaire’s Row, according to two people familiar with the deal. The transaction, which closed in 2014, holds the record for the most expensive home ever sold in New York City.

Located in One57, a more than 1,000-foot-tall glass tower on West 57th Street, the duplex apartment totals 10,923 square feet with six bedrooms and six bathrooms, according to an offering plan for the project. Mr. Dell tapped Miró Rivera Architects to spearhead a renovation of the property, according to Department of Buildings filings. Spanish architect Juan Miró worked for New York City firm Gwathmey Siegel and Associates Architects in the 1990s, but relocated to Austin, where Mr. Dell has a home. Mr. Miró declined to comment, citing a non disclosure agreement.

Property records show that the contract to buy the unit was first inked in 2012, when the building was still under construction, and Mr. Dell had purchased the unit via limited liability company P89-90, LLC. It is the first and only property in the city to break the $100 million barrier, public records show, but that record is widely expected to be broken by the sale of a penthouse at a nearby project at 220 Central Park South, which has not yet closed.

Spokespersons for both Mr. Dell and for the building’s developer, Extell Development, declined to comment. Leighton Candler of the Corcoran Group, who represented Mr. Dell in the transaction, declined to comment. Andrea Riina of Wachtell Lipton Rosen & Katz, the attorney who represented Mr. Dell in the deal, did not respond to numerous requests for comment.

Last year, Mr. Dell entered into contract to buy another penthouse in Boston. The property is in the Four Seasons Private Residences One Dalton Street and had been on the market for close to $40 million. A limited-liability company controlled by MSD Capital, an investment vehicle controlled by Mr. Dell and his family, also bought a $10.9 million condo at Boston’s Millennium Tower in 2016, records show, following a $60 billion deal by his company to acquire EMC, based in Hopkinton, Mass.