The lawsuit was filed by Twentieth Century Fox Film Corporation, Disney Enterprises, Inc., Paramount Pictures Corporation, Universal City Studios Productions LLLP, Columbia Pictures Industries, Inc., and Warner Bros. Entertainment Inc., in the U.S. District Court for the Eastern District of Virginia.
The defendants named in the lawsuit are Megaupload Limited, the registered owner of the website; Vester Limited, the majority shareholder of Megaupload Limited; Megaupload founder Kim Dotcom (aka Kim Schmitz and Kim Tim Jim Vestor); Mathias Ortmann, the Chief Technical Officer; and Bram van der Kolk, who oversaw programming.
The US Justice Department and FBI are seeking to extradite Dotcom to face charges of racketeering fraud, money laundering and copyright theft in a US court, which could see him jailed for up to 20 years if convicted.
Dotcom and his attorney Ira Rothken commented on Twitter.
"MPAA files a meritless civil action against @KimDotcom, who's already facing meritless criminal charges," Rothken tweeted.
Similarly, Dotcom said on Twitter, "Just like the DOJ criminal case against #Megaupload the @MPAA case is a load of nonsense and won't succeed after scrutiny of the facts."