https://techcrunch.com/2022/04/12/twitter-investor-sues-elon-musk-over-delay-in-disclosure-of-stake/

A Twitter shareholder is suing Tesla CEO Elon Musk in a federal securities class action lawsuit because Musk failed to disclose his 5% stake in the social media company when he was required to do so. The delay allowed Musk to buy more shares of Twitter at a lower price and cheat sellers of Twitter stock out of increased profits, claims the plaintiff.

The lawsuit was filed in Manhattan federal court on Tuesday by Marc Bain Rasella on behalf of “all investors who sold or otherwise disposed of Twitter, Inc. securities between March 24, 2022 and April 1, 2022, inclusive.”