Former Egyptian president Hosni Mubarak, his interior minister Habib El-Adly and his top aides were all found not guilty of killing protesters in the January 2011 uprising.
Mubarak and his two sons were also acquitted of all corruption charges.
Mubarak had been accused of selling natural gas to Israel at below-market prices in cooperation with business tycoon Hussein Salem.
Salem, Mubarak and his two sons Alaa and Gamal were also acquitted on other charges of illicit gains.
Mubarak and his co-defendants were found guilty in June 2012 and sentenced to life imprisonment. The initial verdict was appealed successfully and a retrial began in April 2013. Alaa and Gamal were defendants in the trial, but only faced corruption charges.
Despite being acquitted on Saturday, Mubarak and his two sons are still facing separate three-year prison terms for embezzlement of public funds.
The 86-year-old former president who ruled for 30 years has spent much of his detention at a military hospital on the southern outskirts of Cairo.
El-Adly will also remain jailed. In May 2011, he was convicted of money laundering and profiteering, for which he now serves a seven-year jail sentence.
Mubarak, Alaa, Gamal and Adly arrived to court early Saturday ahead of the verdict.
As with past trials, a number of Mubarak supporters were present in front of the court, raising his photograph.
source: ahram online