Adaptive Biotechnologies Corp — Director's Dealing 2025

Nov 19, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Adaptive Biotechnologies Corp (ADPT)
CIK: 0001478320
Period of Report: 2025-11-17

Reporting Person: PISKEL KYLE (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-11-17	Common Stock	S	238	$14.05	Disposed	269343	Direct

Footnotes

F1: This transaction represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the Reporting Person.