https://www.theguardian.com/technology/2022/may/26/elon-musk-twitter-investors-sue

Investors say Musk saved himself $156m by failing to disclose that he had purchased more than 5% of Twitter by 14 March

Elon Musk was sued by Twitter investors for delaying the disclosure of his stake in the company, as the Tesla owner mounts a $44bn takeover bid for the social media platform.