Tesla Chief Executive Elon Musk's brother, Kimbal Musk, who is a Tesla board member, sold 27 million worth of Tesla stock on Thursday, according to regulatory filings. That comes as TSLA stock has retreated in recent days to a critical juncture.

Tesla Inc directors Kimbal Musk and Robyn M Denholm as well as Chief Financial Officer Vaibhav Taneja sold shares of the company over the past week, according to recent filings with the Securities and Exchange Commission.

Though Tesla’s shares doubled over the past 12 months, they’ve had a tough run since the inauguration. Investors are waiting to see if Elon Musk can keep the company’s charmed run going.

Elon Musk's Tesla has seen a huge drop in sales in a number of European countries in recent weeks as the billionaire's involvement in politics has taken a toll on his business