The sale took place on Wednesday and Thursday, the filings showed.
Last week, Amazon said that Bezos would sell up to
50 million shares in the firm.
The sale plan, which is subject to certain conditions, was adopted on Nov. 8, 2023, and would be completed by Jan. 31, 2025, according to the company's latest annual report.
Bezos, who stepped down as the company's chief executive and took over as executive chairman in 2021, founded Amazon as a bookseller in 1994.
He is currently the world's second richest person with a net worth of $200 billion, according to Bloomberg Billionaires Index.