This document summarizes what is known about the perpetrators of the November 2015 Paris attacks based on an intelligence report. At least 25 individuals from France, Belgium, Germany and Syria were involved in planning and executing the highly coordinated multi-site attacks that killed 132 people. Many of the identified attackers had traveled to Syria for military training with ISIS and then entered Europe as refugees, exploiting weaknesses in border security. The attacks required significant planning and manpower, involving suicide bombings and shootings across Paris. Ongoing investigations continue to reveal new suspects and accomplices who helped facilitate the attacks.