Form 4 Filing for Adaptive Biotechnologies Corp

This filing details stock transactions by Julie Rubinstein, President and COO of Adaptive Biotechnologies Corp. On October 1st, 2nd, and 5th, 2026, Rubinstein acquired 11,881 shares of common stock at $12.14 per share through the exercise of stock options. Concurrently, she disposed of shares of common stock on the same dates. Specifically, on October 1st, 6,081 shares were sold at a weighted average price of $27.57 and 5,800 shares at $28.56. On October 2nd, 11,881 shares were sold at a weighted average price of $28.13. On October 5th, 6,699 shares were sold at a weighted average price of $28.82, and 5,182 shares were sold at $29.67. These transactions were executed under a Rule 10b5-1 trading plan. Following these transactions, Rubinstein