Adaptive Biotechnologies Chief People Officer Francis Lo Exercises Options and Sells Shares

Francis Lo, Chief People Officer of Adaptive Biotechnologies Corp (ADPT), filed a Form 4 on June 4, 2026, reporting significant stock transactions executed under a Rule 10b5-1 trading plan. Lo exercised four separate stock option grants totaling 19,521 shares at exercise prices ranging from $3.99 to $12.14 per share, acquiring the underlying common stock. Concurrently, he sold 39,741 shares at $17.49 per share, resulting in a net reduction of his direct holdings. Following these transactions, Lo's direct ownership decreased to 250,934 shares, while he also holds 2,500 shares indirectly through his spouse. The transactions were part of a pre-arranged trading plan established in September 2025, indicating planned disposition rather than reaction to current market conditions.