Adaptive Biotechnologies (ADPT) Director Katey Einterz Sells Shares

What Happened
Owen Katey Einterz, a director of Adaptive Biotechnologies Corp (ADPT), reported an open-market sale of 9,615 shares on August 26, 2026. The shares were sold at $26.00 each for a total transaction value of $249,990. This was a sale (Form 4 code "S"), not a purchase.

Key Details

• Transaction date: 2026-08-26
• Price per share: $26.00; Total value: $249,990
• Transaction type: Open-market or private sale (Form 4 code S)
• Shares owned after transaction: Not specified in the provided filing excerpt
• Notable footnotes/plans: No 10b5-1 plan, tax withholding, or other footnotes disclosed in the supplied data
• Filing date vs transaction date: Filed 2026-08-28 for the 2026-08-26 transaction — appears to be filed within the usual two-business-day window

Context
Sales by insiders can be routine (diversification, tax needs, scheduled plans) and do not by themselves indicate a change in company outlook. This report documents the disposal; there is no additional information here about any related plan or motivation.