$1 Billion-Plus Divorce Settlement 'Not Equitable' to Oil Tycoon's 'Disappointed' Ex-Wife — So She's Launching Plan B

The ex-wife of oil tycoon Harold Hamm said she will appeal her divorce settlement of more than $1 billion, adding through her attorney that the amount is "not equitable" and that she's "disappointed."

Besides the cash-and-assets settlement awarded to Sue Ann Hamm on Monday — one of the biggest in U.S. history — there's also the California ranch and Oklahoma estate worth millions more, the New York Daily News reported. The couple didn't sign a prenuptial agreement.

"Sue Ann is disappointed in the outcome of this case," attorney Ron Barber said. "She dedicated 25 years as Harold's faithful partner in family and business." In addition she alleged in a March 7, 2013 filing obtained by Reuters that she discovered Harold Hamm "was having an affair" in 2010, which prompted her to file for divorce.

More from the Daily News:

Hamm, the chief executive officer of energy giant Continental Resources, owns 68% of his company's stock, worth an estimated $13.5 billion. The 68-year-old oil magnate owns more of the precious liquid than other American. He was born the 13th child of Oklahoma sharecroppers and is now the state's richest person.

Under his leadership, the company's value grew some 400-fold.

But Sue Ann Hamm put in her work at the firm as well, the Daily News said. A lawyer and an economist, she at one point led the crude marketing department, the Daily News added, citing court documents. In the end Hamm believes she deserves more of the $18 billion spike in Continental shares owned by her husband during their marriage, the Daily News said.

Harold Hamm got 94 percent of that increase in Monday's settlement, the Daily News noted.