Apple and Disney have now halted advertising on social media platform X amid an antisemitism storm with owner Elon Musk.
The corporate boycott has gathered pace after Musk replied to a post sharing an antisemitic conspiracy theory, calling it "actual truth".
Apple, Disney, Comcast and Warner Brothers Discovery have all stopped advertising on X, US media reports.
The European Commission, TV network Paramount and movie studio Lionsgate have also pulled ads from the social media platform.
The corporate boycott also follows an investigation by a US group which flagged ads appearing next to pro-Nazi posts on X.
However, a spokesperson for X said the company does not intentionally place brands "next to this kind of content" and the platform is committed to tackling antisemitism.
The SpaceX entrepreneur has denied he is antisemitic and said his comments referred not to all Jewish people but to groups like the Anti-Defamation League (ADL) and other unspecified "Jewish communities".
The White House has condemned Musk's endorsement of the post.
Spokesperson Andrew Bates said: "We condemn this abhorrent promotion of antisemitic and racist hate in the strongest terms."