The stock sale comes at a time when the company's shares have surged more than 73% this year.
During the first two working days of August, Bezos sold 1 million shares as part of a previously announced trading plan, according to the filings.
Bezos, the world's richest man, had said he planned to sell stock worth about $1 billion each year to fund his rocket company, Blue Origin.
The latest share sale leaves him with 54.5 million shares worth roughly $174.64 billion at the current market price.
(Reporting by Munsif Vengattil and Akanksha Rana in Bengaluru; Editing by Sriraj Kalluvila and Anil D'Silva)