In a move that has caught the attention of investors, regulators, and the public alike, the U.S. Securities and Exchange Commission (SEC) has filed a lawsuit against Elon Musk, accusing the billionaire of failing to disclose a major stock purchase of Twitter in 2022. According to the SEC, Musk’s failure to report buying over 5% of Twitter’s shares allowed him to buy them at a significantly lower price, saving himself a substantial sum—approximately $150 million.