The mystery buyer behind a $46 million Venetian Islands sale is no longer a mystery. Palantir Technologies CEO Alex Karp has been identified as the purchaser of a waterfront mansion on Miami Beach’s San Marino Island, tying the tech executive even more closely to South Florida just as his company shifts its corporate base there.
The 9,700-square-foot home at 55 East San Marino Drive closed last June for roughly $46 million, a price that puts it among the priciest residential deals on the Venetian Islands and firmly in trophy territory for Miami Beach waterfront real estate.
The buyer’s identity was revealed this week by The Real Deal, which reports that Karp was the previously undisclosed purchaser of the San Marino Island property. The home changed hands last summer after being held briefly by a Delaware LLC, with the intermediary ownership helping keep Karp’s name out of the spotlight until now. The outlet names Tom and Patricia Kennedy, founders of a Miami Beach-based software firm, as the sellers and notes that Karp’s involvement had not been reported before.
Property records and listing details
Public records and the listing show the house closed on June 24, 2025, for $46,000,000 and describe the property at 9,700 square feet on roughly a half-acre lot with about 160 feet of waterfront and a private dock. The listing history also shows the home was most recently marketed at $48.5 million and credits Douglas Elliman’s Dina Goldentayer as the listing agent, according to Compass.
Palantir’s new Miami connection
Palantir announced in February that it had moved its headquarters to Miami, and the company’s 2025 Form 10-K filed with the U.S. Securities and Exchange Commission lists its principal executive offices at 19505 Biscayne Blvd., Suite 2350, Aventura, Florida. The filing formalized the corporate address change after the company’s social profiles briefly switched to show Miami earlier in the month, according to BusinessDen…