https://www.theguardian.com/technology/2022/may/27/elon-musk-sec-letter-late-twitter-stake-filing-takeover

US financial watchdog asked Musk 10 days before he announced his takeover bid why he had not disclosed his stake sooner

The US financial watchdog has contacted Elon Musk about the disclosure of his stake in Twitter, asking the Tesla chief executive why he appeared to file a crucial form late.