I was reading some background about the World eaters, they had roughly 150,000 marines and they were divided into Companies. Are Companies still 100 marines in the Heresy Era? Or were larger/smaller?


Also, Any one have any rough idea's how large some of the other legions were?


From Lexicanum: "By the beginning of the Horus Heresy, the World Eaters had an active strength of roughly 150,000 Space Marines, placing them in the higher-mid level tier with regard to Legion size"