Thus far the most significant member of this group that we’ve met is Santino D’Antonio, who hired John Wick to kill his sister, Gianna, so that he could take her place.
Like in any career field, there is a hierarchy in the assassin game, and sitting at the tippy-top of the ladder in the John Wick universe is The High Table.
It’s a shadowy organization made up of the leaders of the most powerful crime bosses in the world, and they call all the shots and basically make all of the rules that every killer must follow.
Unfortunately for him, he followed his ascension up by putting a hit on Wick’s head (big mistake) – which was a favor that the protagonist returned by putting a bullet in his head in the middle of The Continental dining room.