Amazon founder Jeff Bezos is planning to sell nearly 5bn worth of shares in the technology giant, a regulatory filing showed. The planned sale by the world's second-richest person comes as Amazon's stock surged to an all-time high, putting it in an exclusive club of companies with a 2 trillion valuation. The proposed sale of 25 million shares was disclosed in a notice filed after market hours on Tuesday when the stock price climbed to 200.43. That marks a 30 percent jump from the beginning of the year, far outpacing the 4 percent average gain in the Dow Jones Industrial Average index. Once it goes through, Bezos would own about 912 million Amazon shares, or 8.8 percent of the outstanding stock.