Judge Viktor Danilkin on Thursday handed down the sentence after convicting Khodorkovsky of stealing oil from his own company annd laundering the proceeds.
Khodorkovsky is in the final year of an eight-year prison sentence. His lawyers say the new sentence is counted from his 2003 arrest and includes his previous term in jail.
Putin is seen as the driving force behind the trial of Khodorkovsky, who challenged him during his presidency.
Putin, eyeing a return to the presidency in 2012, appears unwilling to risk the possibility that a freed Khodorkovsky could help lead his political foes.
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