Amazon stock gains as investment firms buy shares, but Bezos sells a portion of his stake.

Amazon.com's stock saw increased stake purchases by several investment firms including Curi RMB Capital LLC and Banque Transatlantique SA, which now hold 504,052 and 5,849,370 shares respectively. Meanwhile, insider Jeffrey P. Bezos sold a significant amount of shares, reducing his ownership by 0.47%. Amazon reported strong Q2 earnings, surpassing estimates with $1.68 per share, and has set a Q3 guidance. The stock is rated "Buy" with a target price of $262.87.