Not the OP, but when an investor acquires more than 5% of a stock, they have a limited time to disclose it. Elon disclosed his Twitter stock acquisition too late (20 days after instead of 10) and using the wrong form (Schedule 13G instead of Schedule 13D), painting him as a passive investor rather than an activist.
https://www.bloomberg.com/opinion/articles/2022-04-06/elon-m... talks about it.