A $723M offer isn’t nearly enough for a billionaire hedge funder’s estranged wife. What one marital mess says about prenups for the rest of us

But there’s one thing they didn’t do before getting married: sign a prenup.

John has offered Laura $723 million to settle their divorce. But she believes she’s entitled to considerably more: roughly $2.2 billion, or 35% of what she estimates his stake is worth.

“Laura, I think, was alongside me for all of this, and I think it is fair that she received some amount of the appreciation, the net appreciation that occurred during the marriage,” John testified in court, according to the New York Post.

“On reflection, I think that $600 million approximately is a fair amount of that appreciation for her to receive in final judgment,” he added.

The $600 million figure refers to what John considers Laura’s share of the growth in his Two Sigma stake, rather than the entire proposed settlement. The rest of his offer accounts for other marital assets.

The prenup they never signed

According to the WSJ, John proposed to Laura in March 2002, shortly before Two Sigma began investing with more than $20 million in capital. By the time they married later that year, the firm was managing roughly $350 million.

Since the couple didn’t have a prenup and under New Jersey law, the increase in value of a business during a marriage can be subject to equitable distribution, depending on the circumstances. That means the wealth John built could potentially be divided between them.

Prenups are becoming more common especially among younger Americans. A May 2026 Harris Poll conducted for Bloomberg found that 53% of engaged or married Americans under 45 had signed one.

While prenups may have once carried a negative connotation, they give couples a chance to decide how their money, property and other assets would be divided if they divorce, rather than leaving those decisions up to state laws and the courts.

What’s John’s business really worth?

In the case of the Overdeck’s, another sticking point is the couple can’t even agree on what John’s stake in the company is worth. John values his ownership stake at approximately $4.5 billion, while Laura argues it’s worth closer to $6.2 billion. Adding another layer to the dispute, a valuation expert hired by John estimated that his stake was already worth $50 million when the couple married, per the WSJ.

Laura’s legal team has also challenged that valuation, arguing that John’s ownership stake in Two Sigma didn’t fully vest until well after the couple married.

Determining what a business is worth is only part of the equation. Divorce attorney Sarah Jacobs of Jacobs Berger LLC said that courts may also need to consider how much of its growth occurred during the marriage, what drove that growth and whether either spouse contributed to its success, directly or indirectly.

“The value of the business itself is one component, of course, but for the most part, it’s the nuances that make or break the legal arguments,” Jacobs told Moneywise.

Those details can make a significant difference in what each spouse ultimately walks away with. Jacobs explained that the outcome also depends on state law, how the couple’s other assets are divided and whether a settlement involves a lump-sum payment or an exchange of assets. Even the tax consequences can affect how much each person ultimately receives.

The case has also taken another turn. In April 2026, Laura was barred from testifying in support of her claims, presenting her own evidence or calling valuation experts after New Jersey Superior Court Judge Bruce Buechler found that she had committed multiple discovery violations. Her attorneys can still cross-examine John, and her legal team is appealing the ruling.

What can everyday Americans learn from this billion-dollar divorce?

Chances are, you’ll never find yourself fighting over billions of dollars in divorce court. But that doesn’t mean you have nothing to lose if your marriage ends. Maybe you own a small business, have a stake in a family company or are building something you hope will one day take off.