Mikhail Kodanev, also Liberal Russia co-chairman, received the verdict of "guilty" as mastermind. Eleven out of the twelve on the jury voted for it. The jury refused to recommend him for mercy.
Four of the six suspects on the case were considered guilty.
Alexander Vinnik, Kodanev's right-hand man and the only defendant to have pleaded guilty, was unanimously recommended for mercy.
The jury deemed Kulachinsky and Kiselev guilty of complicity in premeditated murder, though they had no idea a well-known parliamentary activist was their victim. The jury did not recommend either for mercy.
The four defendants were also found guilty of acquiring, storing and carrying the murder weapon.
Two of the defendants, Palkov and Drozd, were acquitted and released in the courtroom.
Verdict debates took the jury a bit longer than four hours.
Sergei Yushenkov received two fatal pistol bullets in his home yard in Moscow's northwest, April 17, 2003.
The prosecution tracked the assassination down to clashes in his party.