elon musk tesla ceo stands in the foundry of the tesla gigafactory during a press event twitter stock is on track for its best day since its ipo with shares up more than 29 after an sec filing revealed musk acquired a 92 passive stake in the company the company closed up nearly 73 after its public debut on nov 7 2013 the stock is still down nearly 37 from its alltime high in february 2021 some investors expect the outspoken executive to take a more aggressive stance that could include increasing his stake or taking a controlling interest in the company in an effort to push for change considering what a small investment this is for him 1 of net worth we would not be surprised to see him increase his stake even further and potentially assume a more active role in the decisionmaking at the company truist securities analysts said in a monday note referring to musks reported 273 billion net worth musks investment comes after he said he was considering building a new social media platform the tesla ceo does not like the fact that his tweets are scrutinized by regulators like the us securities and exchange commission given that twitter serves as the de facto public town square failing to adhere to free speech principles fundamentally undermines democracy musk tweeted on march 26 what should be done musk was subpoenaed by the us securities and exchange commission in november after he asked his twitter followers if he should sell 10 of his tesla stock causing shares to fall in february musk accused the sec of harassment and making a calculated effort to chill his right to free speech