SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP 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 APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* ROBINS CHAD M (Last) (First) (Middle) C/O ADAPTIVE BIOTECHNOLOGIES CORPORATION 1551 EASTLAKE AVE E STE 200 (Street) SEATTLE WA 98102 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Adaptive Biotechnologies Corp [ ADPT ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner X Officer (give title below) Other (specify below) CEO and Chairman
	3. Date of Earliest Transaction (Month/Day/Year) 07/01/2019
	4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock(1)	07/01/2019		C		70,680	A	(1)	1,858,180	D
Common Stock								2,237,500(2)	I	By South Dakota Trust Company, Trustee of the Harlan Robins 2017 Trust
Common Stock								500,000(2)	I	By HSR 2014 MOther's Trust U/T/A dated June 17, 2014
Common Stock								350,000(2)	I	By HSR 2017 Trust for Descendants u/a/d November 10, 2017

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series E-1 Preferred Stock	(1)	07/01/2019		C			70,680	(1)	(1)	Common Stock	70,680	$0	0	D

Explanation of Responses:

1. Reflects automatic conversion of Series E-1 Preferred Stock into common stock on a one-for-one basis upon the closing of the initial public offering of Issuer's common stock.

2. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.

	/s/ Chad M Robins by Stacy Taylor, Attorney-in-Fact	07/03/2019
	** 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 4 (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).
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