Adaptive Biotechnologies (ADPT) CCO Susan Bobulsky Sells 1,195 Shares

What Happened
Susan Bobulsky, Chief Commercial Officer of Adaptive Biotechnologies (ADPT), sold 1,195 shares in a reported open-market/private sale on September 15, 2026. The shares were sold at $27.00 per share for total proceeds of $32,265. This was a sale (disposition), not a purchase.

Key Details

• Transaction date and price: 2026-09-15 — 1,195 shares at $27.00 each.
• Total value: $32,265.
• Transaction type/code: Sale (S), reported as open market or private sale.
• Shares owned after transaction: Not specified in the provided Form 4 summary.
• Footnote: Reported as executed under a Rule 10b5-1 trading plan adopted by the reporting person on December 16, 2025 (F1).
• Filing/timeliness: Form 4 filed 2026-09-17; appears to be filed within the typical two-business-day window.

Context
Trades executed under a 10b5-1 plan are prearranged and automated, which can mean the sale was part of a scheduled plan rather than a reaction to new company information. Sales by executives are common and do not necessarily indicate a negative view of the company; retail investors often view purchases as a stronger signal of insider confidence.