Katherine Weingartt: Ken Griffin’s First Wife and High School Sweetheart

Katherine Weingartt is best known as the first wife of Kenneth C. Griffin, the billionaire founder of Citadel LLC, one of the world’s largest hedge funds. The two were high-school sweethearts who married in 1991, years before Griffin became one of the wealthiest people on the planet. Their marriage lasted five years before ending in divorce in 1996. Since then, Katherine has stayed almost entirely out of the public eye. While Griffin went on to build a fortune now estimated at roughly $45 billion, Katherine chose a path defined by privacy. Here’s what we know about her story, her connection to one of finance’s biggest names, and where she stands today.

Who Is Katherine Weingartt?

Details about Katherine Weingartt’s early life are scarce. She was born around 1968, though her exact birthdate and birthplace haven’t been publicly confirmed. What is known is that she grew up in the same area as Ken Griffin and the two became close during their high school years in Boca Raton, Florida.

Beyond her connection to Griffin, Katherine has kept personal details — her education, career, and family background — away from the press. Unlike many people linked to billionaire figures, she’s never pursued public attention or a media profile. That decision to stay private has meant that most of what’s written about her centers on her marriage rather than her own accomplishments, which may well be considerable but remain undocumented in public records.

Katherine Weingartt and Ken Griffin

Katherine and Ken Griffin’s relationship began when they were teenagers. The two dated through high school and maintained their bond as Griffin went on to attend Harvard University, where he famously began trading from his dorm room. Even as an undergraduate, Griffin showed the kind of financial instinct that would later make him a Wall Street legend. He reportedly set up a satellite dish on the roof of his dormitory to get real-time market data.

The couple married in 1991, shortly after Griffin graduated. At the time, he was still in the early stages of building what would become Citadel. Founded in 1990 with roughly $4.6 million in capital, the firm was ambitious but far from the powerhouse it is today. Katherine was there during these formative years, when Citadel was a young startup and Griffin was an unproven fund manager working to establish credibility in a fiercely competitive industry.

Those early years of their marriage coincided with Citadel’s initial growth phase. By the mid-1990s, the firm was gaining traction, but it hadn’t yet reached the scale that would later define Griffin’s career.

The Divorce

Katherine and Ken Griffin divorced in 1996 after approximately five years of marriage. The specific reasons behind the split have never been made public, and neither party has spoken about it in interviews. Given that this happened before Griffin reached peak public prominence, the divorce received relatively little media coverage at the time.

Financial details of any settlement remain private as well. It’s worth noting that in 1996, Citadel was successful but still a fraction of the size it would eventually become. Griffin’s net worth at the time, while substantial, was nowhere near the tens of billions he’d accumulate in later decades. Whatever arrangement was reached, Katherine has never publicly discussed it.

The divorce appears to have been handled quietly, consistent with Katherine’s overall approach to her personal life.

Ken Griffin’s Rise After the Marriage

To understand Katherine Weingartt’s place in the Griffin story, it helps to know what happened after their marriage ended. Ken Griffin went on to turn Citadel into one of the most profitable hedge funds in history. As of recent estimates, his personal net worth sits at approximately $45 billion, making him one of the richest people in the United States.

Griffin married his second wife, Anne Dias-Griffin, in 2003. Dias was herself a hedge fund manager who founded Aragon Global Management. Their divorce in 2015 became one of the most expensive and publicly contentious in American history, with reports of bitter custody battles and allegations on both sides. That separation stood in sharp contrast to the quiet end of Griffin’s first marriage to Katherine.

Beyond finance, Griffin has become a major philanthropist and political donor. He’s given hundreds of millions to educational institutions, cultural organizations, and political causes. He purchased a $238 million penthouse in New York City in 2019, setting a record for the most expensive home ever sold in the U.S. at the time.

All of this happened long after Katherine Weingartt exited his life, but it provides useful context. She knew Griffin before the billions, before the headlines, and before the public persona that now defines him.

Where Is Katherine Weingartt Now?

The honest answer is that very little is known about Katherine Weingartt’s current life. She doesn’t maintain a public social media presence, hasn’t given interviews, and doesn’t appear in society pages or event coverage. This level of privacy is unusual for someone connected to a figure as prominent as Ken Griffin, but it seems to be entirely by choice.

There’s no publicly available information about whether she remarried, pursued a specific career, or relocated after the divorce. It’s possible she’s living a fulfilling life that simply doesn’t intersect with the media spotlight — and there’s nothing unusual about that. Not everyone connected to a famous person wants or needs public recognition.

What we can say is that Katherine Weingartt was part of Ken Griffin’s life during a formative chapter, before Citadel became a household name in finance. Her story is a reminder that behind every public figure, there are private individuals whose contributions and experiences don’t always make the news.

Frequently Asked Questions

Who is Katherine Weingartt?

Katherine Weingartt is the first wife of billionaire hedge fund manager Ken Griffin, founder of Citadel LLC. The two were high-school sweethearts who married in 1991 and divorced in 1996. She has maintained a private life since their separation.

How long were Katherine Weingartt and Ken Griffin married?

They were married for approximately five years, from 1991 to 1996. Their relationship began even earlier, during their high school years in Boca Raton, Florida.

What is Katherine Weingartt’s net worth?

Katherine Weingartt’s net worth has not been publicly disclosed. Details about any divorce settlement from her 1996 split with Ken Griffin remain private. Her ex-husband’s current net worth is estimated at around $45 billion.

Where is Katherine Weingartt today?

Katherine Weingartt has stayed out of the public eye since her divorce from Ken Griffin. There is no confirmed information about her current location, career, or personal life. She does not appear to maintain any public social media accounts.