A jury in Texas has decided Apple must pay $626 million for infringing four patents held by a Nevada-based patent licensing company.
The patents cover technology used in Apple's VPN software and its iMessage and FaceTime messaging systems. The trial follows one in 2012 in which Apple was found to infringe on VirnetX patents but managed to overturn the verdict on appeal.
On Wednesday, a jury in the Eastern District of Texas found for VirnetX and against Apple on all counts.
The Eastern District court is a popular place for patent infringement lawsuits and has earned a reputation as somewhere that favors patent holders in such disputes.
Apple has already asked the judge to declare a mistrial after lawyers for VirnetX made what Apple calls "arguments outside the evidence, blatantly misrepresenting the testimony of Apple witnesses."
Those statements "served to confuse, mislead, and inflame the jury, to render a verdict not based on the record."
Apple did not respond to a request for comment.