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Marvel Comics was the leading publisher in Retail Dollar and Unit Market Shares based on total sales of comics, graphic novels and magazines to comic book specialty stores in July 2009, according to Diamond Comic Distributors.

JULY MARKET SHARES
Based on Total Sales for Comics, Graphic Novels & Magazines Invoiced in July 2009

Publisher Unit Share Dollar Share
MARVEL COMICS 42.58% 37.20%
DC COMICS 34.14% 30.36%
DARK HORSE COMICS 4.06% 5.31%
IDW PUBLISHING 3.72% 4.82%
IMAGE COMICS 3.21% 3.42%
DYNAMITE ENTERTAINMENT 2.27% 2.54%
BOOM! STUDIOS 1.52% 1.45%
VIZ MEDIA 0.76% 1.48%
AVATAR PRESS 0.68% 0.74%
ASPEN MLT 0.62% 0.45%
ARCHIE COMIC PUBLICATIONS 0.53% 0.39%
WIZARD ENTERTAINMENT 0.47% 0.58%
EAGLEMOSS PUBLICATIONS 0.34% 1.35%
ANTARCTIC PRESS 0.34% 0.31%
DABEL BROTHERS PRODUCTIONS 0.32% 0.32%
ZENESCOPE ENTERTAINMENT 0.32% 0.37%
TOKYOPOP 0.30% 0.73%
BONGO COMICS 0.29% 0.23%
DEVILS DUE PUBLISHING 0.23% 0.29%
RANDOM HOUSE 0.22% 0.81%
OTHER NON-TOP 20 3.09% 6.85%

This information may not be reproduced in any format without the express permission of Diamond Comic Distributors.

How does Diamond calculate the charts? It all starts at the comic book shop.

Data for Diamond’s sales charts – which include the monthly market shares and all top product charts – are compiled by Diamond Comic Distributors from a universe of over 4,000+ accounts, comprised of comic book specialty shops and other merchant stores and buyers. The shops are primarily located in North America, with a percentage of sales also to international stores and buyers located throughout the world. The account base includes not only brick-and-mortar comic book specialty shops, but also Internet stores, chain stores, and other specialty stores.

Unit and Retail Dollar sales are calculated based upon orders invoiced and shipped to Diamond accounts during any given month, which comprises initial pre-orders, advance reorders, and reorders, minus any copies that are received back from a title marked as returnable.