Billionaire’s wife says she was coerced into signing pre-nup

It looks like the gloves are off in the divorce of one of Chicago’s wealthiest couples.

In an explosive response to the divorce filing from her husband, billionaire investor Ken Griffin, Anne Dias Griffin filed a petition in Cook County court Tuesday demanding the couple’s premarital agreement be dissolved because it was signed under duress.

Dias Griffin also filed a petition requesting sole custody of the couple’s three children, claiming Ken Griffin has shown “little interest” in them.

◆ Backshot: Ken Griffin is the founder and CEO of Citadel Investment Group, who filed for divorce from his wife of 11 years, Anne Dias Griffin, in late July. According to the filings, the Griffins have been living apart since Feb. 2012.

Dias Griffin requests sole custody of the couple’s children, who are 2, 3, and 6, and plans to file a separate petition to move them to New York. She claims Ken left the family home in 2012 when she was pregnant with their third child, and has never been part of the children’s care.

The prenuptual agreement requires her to waive rights to property and financial help — and Dias Griffin asks the court to dissolve the agreement and give her support for both herself and the children.

In the filing, Dias Griffin said she was given a copy of the prenup just before the wedding, preventing her from reviewing and fairly negotiating it. She first met with a lawyer to review it 11 days before the wedding – and she didn’t get Ken’s financial disclosures until three days before.

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