Dominion asked Facebook, YouTube, Twitter, and Parler to keep posts ahead of threatened lawsuits.
It asked them to keep posts from Trump, far-right news outlets, and pundits in letters Thursday.
Dominion sued Rudy Giuliani and Sidney Powell for defamation. The letters said "more will follow."
Visit the Business section of Insider for more stories.
Lawyers for Dominion Voting Systems sent letters Thursday to Facebook, YouTube, Twitter, and Parler, asking them to preserve posts by more than a dozen high-profile far-right individuals and news outlets ahead of threatened defamation lawsuits.
"A number of posts on your website must be preserved because they are relevant to our client's libel claims; these claims are based on false accusations that Dominion rigged the 2020 election," lawyers from the firm Clare Locke, which represents Dominion, said in the letters.
The lawyers said that, between November and January, then-President Donald Trump, his campaign, attorneys Rudy Giuliani, Sidney Powell, and Lin Wood, MyPillow CEO Mike Lindell, prominent QAnon adherents Ron and Jim Watkins, and far-right commentator Dan Bongino all posted content that could be relevant to Dominion's defamation lawsuits.
Read more: Election-fraud liars are scrambling to avoid lawsuits, but they can't retract the damage they've done
Dominion makes voting machines and has been the target of conspiracy theories, extensively amplified by Trump and his allies, that the company rigged the election.
Last month, Dominion filed defamation lawsuits against Giuliani for $1.3 billion and Powell for another $1.3 billion, and had sent letters threatening to sue various pro-Trump media figures.
In the letters, Dominion's lawyers said "more will follow."
Dominion also asked the social media companies to preserve posts and data from the accounts of: Fox News and Fox anchors Sean Hannity, Jeannine Pirro, Maria Bartiromo, Lou Dobbs; far-right news outlets One America News Network, The Epoch Times, Rebel News, Newsmax, and Newsmax anchor Greg Kelly; Trump campaign lawyer Jenna Ellis; former national security advisor Michael Flynn, entrepreneur Jovan Pulitzer, discredited election analyst Russell Ramsland, former Overstock CEO Patrick Byrne, and conservative talk radio host John Catsimatidis.
Read more: EXCLUSIVE: Dominion sends letters threatening defamation lawsuits to Sean Hannity, Maria Bartiromo, Lou Dobbs, and other pro-Trump media figures