Rogue Trader-Victoria aut Mortis
Was plotting against a bishop important to keeping Chaos out of a planet to draw out the Eldar working against that Chaos threat. His main base was on Septimus 5, a planet which has multiple competing regional governments with high tariffs on trade. He took advantage of the thriving black market to make a network to hide his belongings and operatives. He was defeated when the party and the Anonymous Semi-Legal Shipping Contact teamed up to lure him out of hiding to an abandoned warehouse where he was killed in the ensuing fight.
More info about him in: Note from Lili about Inquisitor Richemont