Apple is accused of teaming up against Amazon with publishers to raise e-book prices in 2010.
The U.S. District Court for the Southern District of New York found that Apple “played a central role in facilitating and executing” the conspiracy to raise e-book prices, and that “Apple’s orchestration” of the conspiracy was necessary to its success.
Attorney General J.B. Van Hollen said Wisconsin and 32 other states pursued the case because Apple violated antitrust laws that resulted in consumers paying more for e-books.
Amazon had been selling them for $9.99 but prices went to $12.99 or $14.99.
The court ruled Apple was the ringleader of a plan to let publishers set their own e-book prices while giving Apple a 30 percent commission.
Apple said it was publishers like Penguin and Harper Collins that created the model.
A hearing to discuss possible damage has yet to be set.
Wisconsin is one of 33 states pursuing the case and consumers here could benefit.
“We look forward to pursuing the next phase of litigation -- recovery of damages for those consumers who were harmed,” said Van Hollen in a release.