Tesla ($TSLA@US) CEO Elon Musk sold nearly $5 billion in Tesla stock, according to financial filings on Wednesday night. He still holds more than 166 million shares. Musk’s trust sold more than 3.5 million shares in trades carried out Tuesday and Wednesday. The sales, worth more than $3.8 billion, were not scheduled sales. Earlier Wednesday evening, filings showed Musk is also selling a separate block of Tesla shares aligned with a plan he set in motion in September. This sale amounts to more than 930,000 shares worth over $1.1 billion. Musk sold the shares partly to satisfy tax obligations related to an exercise of stock options. Before he made the plan public, Musk posted a poll for his 62.5 million Twitter ($TWTR@US) followers to vote and determine the future of his Tesla holdings. Following the poll, Tesla shares dipped more than 15% over Monday and Tuesday and rebounded more than 4% Wednesday. Tesla stock was higher in after-hours trade on Thursday. Musk had previously signaled he may sell a “huge block” of his option in the fourth quarter. When he appeared at the Code Conference in September, Musk said when his stock options expire at Tesla, his marginal tax rate would be over 50%.