Sam Boughedda

Investing.com — The U.S. Securities and Exchange Commission (SEC) is looking over Tesla (NASDAQ:) CEO Elon Musk’s disclosure of his initial stake in Twitter (NYSE:).

Musk was contacted by the SEC on April 4th, asking them why they did not file the necessary paperwork within the stipulated time period of 10 days after the acquisition.

It also asks Musk to address his recent public statements made on Twitter regarding the social media platform and whether it “rigorously adheres to” “free speech principles.”

Musk explained to the SEC why Musk filed a “13G” form and not a “13D”. The 13G form is typically filed by investors planning to own a passive interest, while the 13D form is used for those who intend on changing or influencing control of the issuer.

The SEC has had problems with Musk before. After Musk’s previous tweets, in which he claimed that Tesla had secured funding to make it private at $420 per shares, the regulator sued him.

Tesla shares rose more than 6 percent Friday.