http://www.32trades.com/market-makers-knowing-what-youre-up-against/ The “Three C’s”: Citadel Securities (CDEL), Canaccord Genuity (CSTI) and Cantor Fitzgerald (CANT) are almost always on a ticker together with the four more trusted sources mentioned above. While these “Three C’s” are rarely toxic diluters, they can be heavy short sellers at times, taking advantage of a good thing which is part of the game.