Diamond Comics Distributors

Diamond Comic Distributors, Inc. (often called Diamond Comics, DCD, or casually Diamond) is the largest comic book distributor serving North America. They transport comic books from both big and small comic book publishers, or suppliers, to the retailers. Diamond dominates the direct market in the United States, and has exclusive arrangements with most major U.S. comics publishers, including Dark Horse Comics, DC Comics, IDW Publishing, Image Comics, Marvel Comics, and Radical Comics.

Diamond is also the parent company of Diamond Select Toys, Diamond International Galleries, Hake's Americana & Collectibles, Morphy's Auctions, Alliance Game Distributors, Baltimore magazine, Diamond Book Distributors, E. Gerber Products, Gemstone Publishing, and Geppi's Entertainment Museum.

http://en.wikipedia.org/wiki/Diamond_Comic_Distributors