ADPT Adaptive Biotechnologies Corporation

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES                                                                                   
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940                       

1. Name and Address of Reporting Person * BALDO LANCE	2. Issuer Name and Ticker or Trading Symbol Adaptive Biotechnologies Corp [ ADPT ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                    _____ 10% Owner __X__ Officer (give title below)    _____ Other (specify below) Chief Medical Officer
(Last)          (First)          (Middle) C/O ADAPTIVE BIOTECHNOLOGIES CORP., SUITE 200	3. Date of Earliest Transaction (MM/DD/YYYY) 10/6/2020
(Street) SEATTLE, WA 98102 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	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. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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	10/6/2020		M(1)		6250	A	$7.80	6250	D
Common Stock	10/6/2020		S(1)		4236	D	$48.90 (2)	2014	D
Common Stock	10/6/2020		S(1)		2014	D	$49.84 (3)	0	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		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 of Derivative Security: 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
Stock Option (Right to Buy)	$7.80	10/6/2020		M (1)			6250	(4)	5/6/2029	Common Stock	6250	$0.00	393750	D

Explanation of Responses:
(1)	The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2020.
(2)	The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $48.44 to 49.39, inclusive.
(3)	The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $49.47 to 50.065, inclusive.
(4)	The options vested with respect to 1/4 of the shares on May 6, 2020, with 1/48 of the shares vesting thereafter at the end of each full month of continuous service until fully vested.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
BALDO LANCE C/O ADAPTIVE BIOTECHNOLOGIES CORP. SUITE 200 SEATTLE, WA 98102			Chief Medical Officer

Signatures
/s/ Lance Baldo by Eric L. Billings, attorney-in-fact		10/7/2020
**Signature of Reporting Person		Date