In the last three days of July, Bezos has sold stock worth about $1.8 billion, regulatory filings with the Securities and Exchange Commission showed.
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Amazon declined to comment on Bezos’ stock sale.
The move comes as part of a previously announced 10b5-1 trading plan.
Bezos had previously said he plans to sell stock worth about $1 billion each year to fund his rocket company, Blue Origin.
Bezos’ former wife, Mackenzie Bezos, who currently owns Amazon stake worth more than $37 billion, is now the online retailer’s second largest individual shareholder.