John Overdeck, the billionaire co-founder of Two Sigma Investments, faces a $6.2 billion divorce claim from his wife Laura as their trial began this week in Newark, New Jersey, marking the state’s largest contested divorce case.
The trial opened Wednesday with Laura’s lawyer, Theresa Lyons, arguing that Overdeck had “methodically and strategically” plotted for decades to keep most of his wealth from his wife. Laura is seeking 35 percent of Overdeck’s stake in Two Sigma, valued by her lawyers at $6.2 billion, along with hundreds of millions in Treasury bonds and equal control of the family foundation.
Overdeck’s legal team disputed both the valuation and the core claim. His lawyer, Jonathan Wolfe, said the company was founded in 2001, nearly two years before the couple married in October 2002, and had already developed its business and managed substantial funds before the wedding. Wolfe said a $723 million tax-free settlement was “more than enough to meet the needs of the parties’ marital lifestyle,” and put the actual value of Overdeck’s stake at about $4.9 billion. Laura’s lawyers had characterized an earlier offer of $633 million as inadequate.
The heart of the dispute centers on whether Overdeck’s ownership in Two Sigma should be treated as property built during the marriage. Laura’s legal team argues that Two Sigma had little real value when the couple married and that most of its growth happened during their 20-year relationship. Lyons called the company a “concept of a notion of a company” when they wed. Two Sigma has since grown into a major investment firm managing about $80 billion, compared with less than $1 billion in its early years.
The couple married without a prenuptial agreement and have three children. Laura Overdeck, who has hedge fund experience herself, founded the Bedtime Math nonprofit in 2012. The divorce proceedings began in 2022 after four years of marriage.
The case has broader implications for Two Sigma beyond the couple. Overdeck and fellow co-founder David Siegel each own roughly half the firm but have been locked in a long-running power struggle that became public in 2023. Both stepped down as co-CEOs in August 2024, though they remain as co-chairmen. A major shift in Overdeck’s ownership stake could alter the balance of power between the firm’s two founders, according to Bloomberg reporting.
Laura has also sued Seward & Kissel, the estate planning law firm that worked with the couple, alleging the firm helped Overdeck shield assets into Wyoming trusts before her divorce filing. A New Jersey court has allowed that dispute to continue separately. The foundation the couple established reported about $920 million in assets in its 2024 tax filing.
Sources
- Bloomberg News — trial opening statements, Overdeck’s offer of $633 million, and implications for Two Sigma leadership
- New York Post — trial details, competing valuations, and asset-hiding allegations against estate planning firm
- Moneycontrol — trial timeline, marital property dispute, and Two Sigma valuation context
