On December 2, 2025, Landlion LLC—a quietly incorporated entity organized by Jeffrey Sprecher—completed its purchase of Entelechy II, the late John Portman’s oceanfront retreat on Sea Island, for $30 million.
It was the second-largest real estate transaction in Georgia for 2025, eclipsed only by boxer and YouTube personality Jake Paul’s $39 million purchase of Southlands Plantation in Decatur County earlier in the year. But Paul’s deal involved nearly 6,000 acres of South Georgia hunting land—a different category entirely. For a single-family residential property, the Sea Island sale stood alone.
Sprecher and his wife, Kelly Loeffler, added an architectural landmark to a portfolio that already includes Descante, their Buckhead residence. Since 1964, Portman made his home on wooded acreage off Northside Drive, while Sprecher and Loeffler have called nearby Tuxedo Park home. Buyer and seller, separated by a generation, share Buckhead as home base.
John Calvin Portman Jr. arrived at Georgia Tech from Walhalla, South Carolina in the early 1940s. In 1967, he unveiled the Hyatt Regency Atlanta, with its soaring 22-story atrium lobby—a vast interior volume of light, greenery, and exposed glass elevators. The hospitality industry took notice. Within a decade, Portman’s atrium concept had spread to the Westin Bonaventure in Los Angeles, the Renaissance Center in Detroit, and eventually to Shanghai.
But the laboratory for these ideas wasn’t a hotel. It was a house.
In 1964, Portman built Entelechy I on wooded acreage along Northside Drive in what was then unincorporated Fulton County—the area we now know as Sandy Springs, on Buckhead’s northern edge. The name came from Aristotle’s Greek concept of “entelechy”: the realization of potential. For Portman, who was raising six children with his wife Joan, the house was both laboratory and manifesto. Its hollow cylindrical columns—eight feet in diameter—concealed spiral staircases, libraries, and art alcoves. Water meandered through the living spaces. Light poured down through circular skylights.
“So much of what I’m all about is evident here,” Portman told journalist Steve Oney in a 1987 profile for Esquire magazine, sitting in a butterfly chair in his backyard one autumn morning. “This is where I really first brought nature indoors.”
He elaborated on the philosophy behind his work: “I’m preoccupied with nature. I grew up in an agrarian society. My grandfather had a farm south of Atlanta, and there I fell in love with the stillness of a lake, with flowers. Those are the things I try to put in my buildings.”
Those hollow columns, that indoor nature, those soaring volumes—all would reappear in the Hyatt Regency three years later, scaled up to commercial dimensions but born in domestic intimacy.
Oney captured a moment that illustrated the connection between laboratory and skyline: “Wandering the grounds of his estate, he points through some second-growth forest. ‘See there, you can just make out the skyline,’ he says with pride. True enough, the needle of the Peachtree Plaza is shimmering there in the morning light.”
In 1986, Portman turned to Sea Island for his next project. He purchased three oceanfront lots and announced he would build a home containing “everything I’ve learned as an architect.” He christened it Entelechy II.
The neighbors were not pleased.
Sea Island was, as Oney described it, “a secluded haven of old-money WASPs who disdain ostentation and refer to their multimillion-dollar homes as cottages.” Portman’s 12,586-square-foot creation—with its sculpture gardens, waterfalls, and white concrete latticework roof topped by gazebos and abstract art—was not a cottage. A front-page headline in the Los Angeles Times captured the reaction: “HIS DREAM A NIGHTMARE TO NEIGHBORS.”
Architectural Digest featured the home in 1987—the same year the Los Angeles Times put its controversial construction on the front page.
Jack Portman, the architect’s son, put it more succinctly in a 2018 Architectural Digest profile: “Sea Island is a very conservative place with conservative architecture, and all of a sudden this spaceship lands.” Yet even as neighbors complained, curiosity drew crowds. “During construction, there were people lined up for a mile waiting to see it,” Jack recalled.
Not everyone recoiled. Miles Redd, now among America’s most celebrated interior designers, was a teenager spending summers on Sea Island when Portman broke ground. He and his mother had made a hobby of critiquing the island’s construction sites, but Entelechy II was different: the only one locked tight. “My provincial eyes had never seen such scale and chic,” Redd later wrote in Frederic magazine, recalling cranes hoisting columns and bronze figures emerging behind stucco walls. “We need more Mr. Portmans in this world,” he concluded.
The elder Portman was unbothered by the controversy. “The rooftop is my homage to Dalí,” he told Oney. “I’m an open, straightforward person. I just hate being a phony, which is what I’d be if I went around explaining it all. See, I’m on down the road, thinking about the next thing.”
When Portman died in December 2017 at age 93, he left behind an Atlanta transformed—and two homes that had never been offered for sale.
Jeffrey Sprecher understands what it means to build something from modest beginnings.
In 1996, the California-born entrepreneur acquired a struggling Atlanta energy trading platform for one dollar. Through dealmaking and technological innovation, he transformed that platform into Intercontinental Exchange—ICE—a financial technology company now worth approximately $90 billion in market capitalization. In 2013, ICE acquired the New York Stock Exchange for $10.9 billion, making Sprecher the owner of the most recognizable trading floor in global finance.
Today Sprecher remains ICE’s chairman and CEO. Forbes estimates his net worth at more than $1.3 billion. ICE operates twelve regulated exchanges worldwide and six clearinghouses.
His wife, Kelly Loeffler, has built her own career across business and public service. The Illinois farmer’s daughter holds a CFA designation—she remains the only charterholder to have served in Congress—and rose through ICE as head of investor relations and communications before becoming the founding CEO of Bakkt, the company’s cryptocurrency venture.
In December 2019, Governor Brian Kemp appointed Loeffler to fill a vacant U.S. Senate seat. Her fourteen-month tenure ended with a January 2021 runoff loss to Raphael Warnock. In February 2025, she was confirmed as the 28th Administrator of the Small Business Administration, returning to Washington as a member of the Trump cabinet.
In June 2009, as the financial crisis was reshaping American wealth, Sprecher and Loeffler purchased Descante, a 15,000-square-foot residence in Tuxedo Park, for $10.5 million. At the time, it was the most expensive residential transaction in Atlanta history.
The property had been built in 1997 by Bridget and Jerome Dobson, the soap opera creators behind General Hospital and Guiding Light. The Dobsons had assembled an estate of considerable eclecticism: nine seventeenth-century fireplaces imported from Cambridge University, 170-year-old Versailles parquet flooring in the dining room, a 1,500-year-old Etruscan statue, Renaissance-era frescoes, a nineteenth-century French pool house, and fossilized dinosaur footprints embedded in the kitchen floor.
Sprecher and Loeffler negotiated the purchase at a significant discount from the original $16.9 million asking price—a pattern that would repeat with their Sea Island acquisition.
When the Portman Foundation listed Entelechy II in November 2024, the asking price was $40 million. The family had invested more than $6.5 million in recent renovations before bringing the property to market for the first time.
The sale closed on December 2, 2025 for $30 million and public records soon told the rest. Glynn County filings showed Landlion LLC as the purchasing entity. The LLC’s organizer: Jeffrey Sprecher. Bloomberg and the Atlanta Journal-Constitution traced the connection within days.
Nearly four decades after Sea Island’s old guard dismissed it as a nightmare, Portman’s dream had become arguably the most expensive home ever sold in Georgia.
Which raises a question that Atlanta real estate insiders and architectural enthusiasts have asked for years: What happens if Entelechy I ever comes to market?
Portman’s original home—the 8,604-square-foot residence where he raised six children and first brought nature indoors—has never been sold. The compound remains in Portman family hands, its nearly 25 wooded acres assembled across multiple parcels purchased over decades.
The Fulton County tax assessor values the combined property at slightly over $15 million. This isn’t simply a large lot in Sandy Springs. This is the birthplace of an architectural movement—the residential laboratory where the atrium hotel was conceived.
Jarel Portman, the youngest of John Portman’s six children, described growing up there in a 2014 Atlanta Journal-Constitution profile: “Standing at one particular wall of glass at Entelechy, looking past a rippling canopy of pines, Jarel could see downtown Atlanta. From that perch he watched his father’s constructions—the Hyatt Regency, Peachtree Center, Westin Peachtree Plaza and the Marriott Marquis—climb into the sky, thinking: ‘My dad did that.'”
For context: the current Atlanta intown record stands at $19.8 million, set in March 2024 for a Tuxedo Road property in Buckhead. Entelechy I, with its architectural significance and nearly 25 acres of old-growth trees, could challenge that mark.
Reached for comment by Buckhead.com, Jana Portman Simmons, a daughter of the architect and president of Portman Financial, offered a clear response: “At this point, the Portman Foundation is planning to keep the home.”
Entelechy, in the Greek, means becoming what you were meant to become. In 1987, Portman’s Sea Island home was a scandal. In 2025, it set a record. The market, it seems, eventually caught up with the architect.
From a wooded compound off Northside Drive to a glass-walled retreat on the Atlantic, the story of one of Georgia’s most notable architects continues. A Buckhead couple now holds the keys to one. The Portman family guards the other.