Washington, D.C. 20549


Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB Number: 3235-0104
Estimated average burden
hours per response: 0.5
1. Name and Address of Reporting Person*

(Last) (First) (Middle)


(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
3. Issuer Name and Ticker or Trading Symbol
Adaptive Biotechnologies Corp [ ADPT ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
Chief People Officer
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Right to Buy) (1) 05/06/2029 Common Stock 200,000 7.8 D
Explanation of Responses:
1. The options vest with respect to 1/4 of such shares on May 6, 2020, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.
/s/ Francis Lo by Stacy Taylor, Attorney-in-Fact 06/26/2019
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
lo lpoa

           FOR SECTION 16(a) REPORTING

	KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby 
revokes any prior power of attorney regarding reporting requirements
under Section 16(a) of the Securities Exchange Act of 1934, as amended
(the "Exchange Act") with respect to equity securities of the Company, and
hereby makes, constitutes and appoints Chad Cohen, Stacy Taylor and 
Kyle Piskel and each of them, as the undersigned's true and lawful 
attorney-in-fact (the "Attorney-in-Fact"), with full power of substitution 
and resubstitution, each with the power to act alone for the undersigned 
and in the undersigned's name, place and stead, in any and all 
capacities to:

	1.	Prepare, execute, deliver and file with the United 
States Securities and Exchange Commission, any national securities 
exchange and Adaptive Biotechnologies Corporation (the "Company") any and 
all reports (including any amendment thereto) of the undersigned 
required or considered advisable under Section 16(a) of the Exchange Act,  
and the rules and regulations thereunder, with respect to the equity 
securities of the Company, including Form 3 (Initial Statement of 
Beneficial Ownership
 of Securities), Form 4 (Statement of Changes in 
Beneficial Ownership), and Form 5 (Annual Statement of Changes in 
Beneficial Ownership); and

	2.	Seek or obtain, as the undersigned's representative and 
on the undersigned's behalf, information on transactions in the Company's 
equity securities from any third party, including the Company, brokers, 
dealers, employee benefit plan administrators and trustees, and the 
undersigned hereby authorizes any such third party to release any such 
information to the Attorney-in-Fact.

	The undersigned acknowledges that:

	1.	This Limited Power of Attorney authorizes, but does not 
require, the Attorney-in-Fact to act at his or her discretion on 
information provided to such Attorney-in-Fact without independent 
verification of such information;

	2.	Any documents prepared and/or executed by the 
Attorney-in-Fact on behalf of the undersigned pursuant to this 
Limited Power of Attorney will be in such form and will contain such 
information as the Attorney-in-Fact, in his or her discretion, deems 
necessary or desirable;

	3.	Neither the Company nor the Attorney-in-Fact assumes any 
liability for the undersigned's responsibility to comply with the 
requirements of Section 16 of the Exchange Act, any liability of the 
undersigned for any failure to comply with such requirements, or any 
liability of the undersigned for disgorgement of profits under 
Section 16(b) of the Exchange Act; and

	4.	This Limited Power of Attorney does not relieve the 
undersigned from responsibility for compliance with the undersigned's 
obligations under Section 16 of the Exchange Act, including, without, 
limitation, the reporting requirements under Section 16(a) of the 
Exchange Act.

	The undersigned hereby grants to the Attorney-in-Fact full power 
and authority to do and perform each and every act and thing requisite, 
necessary or convenient to be done in connection with the foregoing, 
as fully, to all intents and purposes, as the undersigned might or 
could do in person, hereby ratifying and confirming all that the 
Attorney-in-Fact, or his or her substitute or substitutes, shall 
lawfully do or cause to be done by authority of this Limited Power 
of Attorney.

	This Limited Power of Attorney shall remain in full force and 
effect until the undersigned is no longer required to file Forms 3, 4 
or 5 with respect to the undersigned's holdings of and transactions in 
equity securities of the Company, and shall only be revoked upon the 
earliest of (i) revocation by the undersigned in a signed writing 
delivered to the Attorney-in-Fact or to the Secretary of the Company,
(ii) termination of the undersigned's service as an employee or director 
(as applicable) of the Company, (iii) termination of the Attorney-in-Fact's
service as an officer or other employee of the Company, or (iv) execution
of a subsequent power of attorney by the undersigned which specifically
provides for the revocation of any prior power of attorney regarding
reporting requirements under Section 16(a) of the Exchange Act.

	This Limited Power of Attorney shall be governed and construed 
in accordance the laws of the State of Delaware without regard to 
the laws that might otherwise govern under applicable principles of 
conflicts of laws thereof.

	IN WITNESS WHEREOF, the undersigned has caused this Limited Power 
of Attorney to be executed as of June 20, 2019.

	Signature:	/s/ Francis Lo