The government decided not to appeal the cases against Henry T. Nicholas III and Henry Samueli, U.S. attorney's spokesman Thom Mrozek said.
Prosecutors also withdrew their appeal of U.S. District Judge Cormac Carney's dismissal of former Broadcom human resources director Nancy Tullos' guilty plea to obstruction of justice.
The announcement wipes away the last vestiges of a massive and high-profile criminal and civil prosecution of Broadcom's top leadership on allegations of stock option backdating that fell apart under judicial scrutiny.
Backdating involves retroactively setting a stock option's exercise price to a low point in the stock's value, boosting profits when the shares are sold. It is legal when properly accounted for, but if not properly disclosed it can allow companies to overstate profits and underpay taxes.
The Irvine, Calif.-based chipmaker was ultimately forced to write down $2.2 billion in profits after its actions were uncovered. Hundreds of other companies have been forced to make similar adjustments or pay fines to the SEC since authorities began investigating the practice in 2006.
Carney in December also threw out the stock option backdating case against ex-CFO William Ruehle.
"After a thorough evaluation of the issues associated with the cases, the government decided to not pursue the appeals," said Mrozek. He declined further comment.