The stock market case relates to the sale of the Al Watany Bank of Egypt.
The two men, along with their father, are already facing a litany of other charges, including official corruption, in a separate ongoing trial.
That case will result in a verdict by a court on June 2.
Hosni Mubarak, whose regime collapsed in February 2011, also faces charges of murder in connection with the killing of anti-government protesters by security officials during the uprising that ultimately brought down his 30-year rule.
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