FRANCIS LO - 06 Mar 2023 Form 4 Insider Report for Adaptive Biotechnologies Corp (ADPT)

Role: Chief People Officer
Signature: /s/ Francis Lo by Stacy L Taylor, Attorney-in-Fact
Issuer symbol: ADPT
Transactions as of: 06 Mar 2023
Net transactions value: -$58,413
Form type: 4
Filing time: 08 Mar 2023, 19:04:27 UTC
Previous filing: 10 Mar 2022
Next filing: 06 Mar 2024
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ADPT	Common Stock	Award	$0	+85,697	+96%	$0.000000	175,285	06 Mar 2023	Direct
transaction	ADPT	Common Stock	Sale	$58,413	-6,816	-3.9%	$8.57	168,469	06 Mar 2023	Direct	F1
holding	ADPT	Common Stock						2,500	06 Mar 2023	By You Jin Lee (spouse)

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ADPT	Stock Option (right to buy)	Award	$0	+128,599		$0.000000	128,599	06 Mar 2023	Common Stock	128,599	$8.46	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
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.
F2	The options vest with respect to 1/4 of such shares on March 4, 2024, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.

Content

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.

The options vest with respect to 1/4 of such shares on March 4, 2024, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.