Billionaire divorce takes nasty turn after wife who angrily rejected $633m settlement was caught hacking tycoon husband's emails

By NATASHA ANDERSON, US SENIOR NEWS REPORTER Published: 13:40, 18 August 2026 | Updated: 13:57, 18 August 2026 The estranged wife of a billionaire hedge fund manager who rejected his $633 million settlement has been barred from taking the stand in her divorce trial after she was caught hacking her husband's emails. John and Laura Overdeck, both 56, appeared before New Jersey Family Court last week to begin proceedings in the largest contested divorce in the state's history. The hedge fund tycoon, who according to Forbes is worth $8 billion, is set to testify today after the judge ruled that Laura 'engaged in multiple discovery abuses,' the New York Post reported. Laura accessed John's private computer and took photos on her phone of confidential emails between the billionaire and his lawyers, the court heard. A court order required her to turn the device over, but Laura neglected to do so for 'at least 13 months,' Judge Bruce Buechler said. When she finally did, the photographs of the correspondence between John and his legal team had been deleted. Laura allegedly claimed to have deleted images because her phone was low on storage. She also convinced post office staff to provide her with an extra key to John's P.O. box so that she could 'access the mail in that box,' the judge said. She has not disclosed what items, if any, she took from the box. In the wake of her actions, Buechler has issued what he called the 'ultimate sanction' and has dismissed her divorce complaint. John and Laura Overdeck, both 56, are facing off in the largest contested divorce in New Jersey history. John is set to testify today, but Laura has been barred from taking the stand New Jersey Family Court Judge Bruce Buechler, in what he has called the 'ultimate sanction,' dismissed Laura's divorce complaint and barred her from presenting any affirmative evidence in the case This means she is barred from presenting any affirmative evidence in the case, testifying in support of her claim or calling experts to the stand, the Post reported.  Laura's lawyers will instead need to grill John during cross examination to make their case. Buechler, in his ruling, did note that the couple's 'assets need to be equitably distributed.' In their opening statements, Laura's lawyers claimed that John had 'methodically and strategically' tried for decades to secure his own wealth in case of a divorce.  They claimed that he 'schemed' to leave her with as little as possible in the split, an amount they claimed was $633 million. His lawyers said that John was now prepared to hand over $723 million in tax-free cash to Laura.  The main sticking point between the two is over whether Laura is entitled to an even bigger sum tied to the value of John's firm Two Sigma. She is seeking 35 percent of the value of his stake in the firm, which according to her lawyer would be worth $6.2 billion. His lawyers claimed it equated to $4.9 billion. His lawyers have said that the firm is not a marital asset while adding that it was founded two years before they wed in 2002.  John has an estimated net worth of $8 billion according to Forbes, he and his estranged wife lived in a $4 million New Jersey mansion Lawyers for Laura claimed that as well as managing the firm with his partner, John also 'worked tirelessly' to hide assets from his wife John's lawyer Jonathan Wolfe said: 'The company had done substantial work and managed hundreds of millions of dollars before the parties’ marriage.' Her lawyer Therese Lyons countered that the company was just a 'concept' then and that it only started trading after they were wed.  The company grew exponentially during their marriage, with John testifying last Wednesday that he had grown it from under $1 billion in 2001 to now $80 billion.  Lyons claimed that as well as managing the firm with his partner he also 'worked tirelessly' to hide assets from his wife.  She accused him of 'planning his escape' during their marriage, and accused him of a 'scheme' to strip billions out of their marital estate.  Wolfe said that John earned $685 million during their marriage, all of which was held in a joint bank account. Prior to their marriage, John had already made billions, he added.  Prior to co-founding Two Sigma with David Siegel, he had worked at DE Shaw & Co, an investment firm, and also helped Jeff Bezos launch Amazon.  Wolfe said that John's offer to his estranged wife was 'more than enough to meet the needs of the parties' marital lifestyle'.  The New York City headquarters for Two Sigma, which John co-founded with David Siegel The couple alongside the Governor of Maryland Wes Moore in 2019 Laura is also now seeking hundreds of millions in treasury bonds that are held in a trust, as well as a court order handing her equal control of their family foundation.  Failing that order, her lawyers have asked the court to have John give 50 percent of the value of their foundation to a charity of her choosing.  According to a tax filing in 2024 seen by Bloomberg, their family foundation has assets in it totaling $920 million. Laura holds a degree in astrophysics from Princeton University and an MBA from the Wharton School of Business.  She also founded and oversees a nonprofit called Bedtime Math that helps parents teach math to their kids.