X0306 4 2020-12-22 0 0001478320 Adaptive Biotechnologies Corp ADPT 0001780790 HILL NANCY LOUISE C/O ADAPTIVE BIOTECHNOLOGIES CORP. SUITE 200 SEATTLE WA 98102 0 1 0 0 EVP, Operations & Program Mana Common Stock 2020-12-22 4 M 0 57000 0.84 A 67000 D Common Stock 2020-12-22 4 S 0 36514 63.52 D 30486 D Common Stock 2020-12-22 4 S 0 20486 64.06 D 10000 D Common Stock 500 I By Ryan Hill (son) Common Stock 400 I By Brandon Hill (son) Common Stock 300 I By Connor Hill (son) Stock Option (Right to Buy) 0.84 2020-12-22 4 M 0 57000 0.00 D 2023-11-03 Common Stock 57000 2000 D The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020. The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $62.79 to 63.785, inclusive. The reporting person undertakes to provide to Adaptive Biotechnologies Corporation, any security holder of Adaptive Biotechnologies Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in any footnotes to this Form 4. The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $63.79 to 64.58, inclusive. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein. The option is fully vested and exercisable. /s/ Nancy Hill by Eric Billings, Attorney-in-Fact 2020-12-23