Tesla chief executive Elon Musk has sold around $5bn shares in the electric car maker.
It comes days after he asked his 63 million twitter followers whether he should sell 10% of his stake in Tesla.
The agency shares fell by around 16% in the two days after the poll came out in esteem of him selling shares, before regaining some points.
Tesla is the world most valuable carmaker, with a stock market valuation of more than $1tn.
Mr. Musk trust sold almost 3.6 million shares in Tesla, worth around $4bn.
He also sold another 934,000 shares for about $1.1bn after exercising choices to acquire nearly 2.2 million shares, according to a filing with the US stock market regulator.
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The documents showed that the scale of about a fifth of the shares was made based on a pre-arranged trending plan set up in September, long before Elon Musk social media posts at the weekend about selling some of his shares.
However, the regulatory filings also showed that the sale of the remainder of the shares had not been scheduled.
On Saturday, Elon Musk posted a poll asking his followers to vote on whether he should sell part of his stake in Tesla to meet his tax obligations.
“Much is made lately of unrealized gains being a means of tax avoidance, so I propose selling 10% of my Tesla stock,” he tweeted.