Elon Musk, CEO of Tesla (NASDAQ: TSLA), exercised options to buy additional 2.13 million shares of Tesla, according to the latest filings.

Musk then sold 934,091 shares to ink $906.5 million. The Chief Executive of Tesla and SpaceX earned $12.72 billion so far from selling Tesla stock.

The selling spree has started after Musk asked tens of millions of his Twitter followers whether he should sell 10% of his Tesla holdings.

If he is to fulfill the Twitter poll promise, he is due to sell additional 5 million shares of Tesla.

Tesla stock price closed 5% lower yesterday at $966.41 and is down a further 1% in pre-open Tuesday.