Elon Musk has faced questions from the US Securities and Exchange Commission about how and when he disclosed his large stake in Twitter last month, prior to agreeing to buy the social media company.
The SEC asked him to advise why the initial disclosure does not appear to have been made within the required 10 days from the date on which he acquired a stake in the company greater than 5%.
Musk had previously made several comments on Twitter suggesting he felt changes needed to be made to the platform.