Announcing the advance in the probe, the Paris prosecutors' office today hailed the "remarkable work" of the French anti-bandit crime squad.
Robbers are believed to have forced their way into the private apartment where Kardashian West was staying during Paris Fashion Week in October.
They allegedly tied up the reality TV star and stole more than USD 10 million worth of jewelry, with authorities now looking at a possible inside job.
The preliminary charges filed today covered a wide range of alleged crimes, including armed robbery in an organized gang, kidnapping, criminal association, illegal possession of firearms and ammunition, use of forged papers, and complicity.