Known for his lavish spreads in his hometown of Austin, Texas, and on the Big Island of Hawaii, tech mogul Michael Dell has expanded east, buying two super-deluxe high-rise homes in Boston and in New York City in recent years.
In 2014, Mr. Dell, 53, spent $100.47 million on a penthouse on New York’s Billionaire’s Row, setting a record for the city’s priciest home purchase, people familiar with the transaction said. Last year, he snapped up a penthouse seeking $40 million at the Four Seasons Private Residences One Dalton Street...