In the last three days of July, Bezos has sold stock worth about $1.8 billion, regulatory filings (https://www.sec.gov/Archives/edgar/data/1018724/000101872419000083/xslF345X03/wf-form4_156504082729937.xml) with the Securities and Exchange Commission showed.

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.

(Reporting by Manojna Maddipatla in Bengaluru and Jeffrey Dastin in San Francisco; editing by Gopakumar Warrier)