The passing of the verdict was delayed twice this week because the jury became fatigued while carrying out a final review of the extensive amount of documents in the case.
Boris Nemtsov, a veteran politician and key opposition figure, was shot dead on the Bolshoy Moskvoretsky Bridge, near the Kremlin, in February 2015.
The assassination resulted in a demonstration of thousands in Moscow, demanding the killers be found and brought to justice.
In March 2015, Russian police arrested five suspects, including two suspected hit men. One of them, Zaur Dadaev, had reportedly confessed his involvement in the murder.
More about: #Boris-Nemtsov
