Nine men and one woman are accused of planning and carrying out the armed robbery at Paris Fashion Week in 2016.

A Paris court on Friday found the ringleader and seven other people guilty in the robbery of Kim Kardashian at her residence in the French capital in 2016.

The chief judge, David De Pas, said the ages of the defendants — the oldest is 79 and some others are in their 60s and 70s — weighed on the court’s decision not to impose harsher sentences that would...