Da Newsarama:

TOP COMIC BOOK PUBLISHERS
PUBLISHER - UNIT SHARE - DOLLAR SHARE
MARVEL COMICS 42.56% 38.77%
DC COMICS 34.89% 29.59%
DARK HORSE COMICS 4.20% 5.62%
IMAGE COMICS 3.37% 4.23%

TOP 10 COMICS
RANK - DESCRIPTION - PRICE - VENDOR
1 SIEGE #1 $3.99 MAR
2 GREEN LANTERN #50 $3.99 DC
3 BATMAN AND ROBIN #7 $2.99 DC
4 CAPTAIN AMERICA: REBORN #6 $3.99 MAR
5 NEW AVENGERS #61 $3.99 MAR
6 AMAZING SPIDER-MAN #617 $3.99 MAR
7 GREEN LANTERN CORPS #44 $2.99 DC
8 DARK AVENGERS #13 $3.99 MAR
9 BLACKEST NIGHT: THE FLASH #2 $2.99 DC
10 UNCANNY X-MEN #520 $2.99 MAR

TOP 10 GRAPHIC NOVELS & TRADE PAPERBACKS
RANK - DESCRIPTION - PRICE - VENDOR
1 THE WALKING DEAD VOLUME 11: FEAR THE HUNTERS TP $14.99 IMA
2 THE UNWRITTEN VOLUME 1: TOMMY TAYLOR AND THE BOGUS IDENTITY TP $9.99 DC
3 ULTIMATE SPIDER-MAN VOLUME 22: ULTIMATUM TP $19.99 MAR
4 ULTIMATUM TP $19.99 MAR
5 CHILL HC $19.99 DC
6 CAPTAIN AMERICA: ROAD TO REBORN TP $19.99 MAR
7 HOUSE OF MYSTERY VOLUME 3: THE SPACE BETWEEN TP $14.99 DC
8 BLADE OF THE IMMORTAL VOLUME 22: FOOTSTEPS TP $19.99 DAR
9 STAR WARS: KNIGHTS OF THE OLD REPUBLIC VOLUME 8: DESTROYER TP $17.99 DAR
10 SIEGE: PRELUDE TP $24.99 MAR