RUBINSTEIN JULIE (President) sold 8.6% of their position (35.64K shares) of ADAPTIVE BIOTECHNOLOGIES CORP on the open market

Open‑market sale worth $897.5K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 6 sales

RUBINSTEIN JULIE

Filed: 10/26/2026ACC: 0001780664-26-000045

InsiderRUBINSTEIN JULIECIK 1780664

→

IssuerADAPTIVE BIOTECHNOLOGIES CORPCIK 1478320

Officer· President

Since Jun 2019

-35.64K

Net shares

Net seller

$897.5K

Total sold

Open market trades

0B · 6S

Total transactions

35.64K acquired · 71.29K disposed

Non-Derivative Transactions9

Common Stock

Direct

M · Option Exercise

+11.88K

Price / share

$12.14

Trade value

$144.24K

% of position

3.1%

10/22/2026

377.80K→389.68K

Common Stock

Direct

S · Sale

−10.18K

Price / share

$24.38

Trade value

$248.21K

% of position

2.6%

10/22/2026

389.68K→379.50K

Common Stock

Direct

S · Sale

−1.70K

Price / share

$25.29

Trade value

$42.99K

% of position

0.4%

10/22/2026

379.50K→377.80K

Common Stock

Direct

M · Option Exercise

+11.88K

Price / share

$12.14

Trade value

$144.24K

% of position

3.1%

10/23/2026

377.80K→389.68K

Common Stock

Direct

S · Sale

−4.50K

Price / share

$24.50

Trade value

$110.25K

% of position

1.2%

10/23/2026

389.68K→385.18K

Common Stock

Direct

S · Sale

−7.38K

Price / share

$25.28

Trade value

$186.59K

% of position

1.9%

10/23/2026

385.18K→377.80K

Common Stock

Direct

M · Option Exercise

+11.88K

Price / share

$12.14

Trade value

$144.24K

% of position

3.1%

10/26/2026

377.80K→389.68K

Common Stock

Direct

S · Sale

−8.50K

Price / share

$25.94

Trade value

$220.57K

% of position

2.2%

10/26/2026

389.68K→381.18K

Common Stock

Direct

S · Sale

−3.38K

Price / share

$26.30

Trade value

$88.84K

% of position

0.9%

10/26/2026

381.18K→377.80K

Total

Net shares

+0.00

Net value

-$464.75K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	10/22/2026	M · Option Exercise	+11.88K	$12.14	$144.24K	3.1%	377.80K	389.68K
Common Stock Direct	10/22/2026	S · Sale	−10.18K	$24.38	$248.21K	2.6%	389.68K	379.50K
Common Stock Direct	10/22/2026	S · Sale	−1.70K	$25.29	$42.99K	0.4%	379.50K	377.80K
Common Stock Direct	10/23/2026	M · Option Exercise	+11.88K	$12.14	$144.24K	3.1%	377.80K	389.68K
Common Stock Direct	10/23/2026	S · Sale	−4.50K	$24.50	$110.25K	1.2%	389.68K	385.18K
Common Stock Direct	10/23/2026	S · Sale	−7.38K	$25.28	$186.59K	1.9%	385.18K	377.80K
Common Stock Direct	10/26/2026	M · Option Exercise	+11.88K	$12.14	$144.24K	3.1%	377.80K	389.68K
Common Stock Direct	10/26/2026	S · Sale	−8.50K	$25.94	$220.57K	2.2%	389.68K	381.18K
Common Stock Direct	10/26/2026	S · Sale	−3.38K	$26.30	$88.84K	0.9%	381.18K	377.80K
Total			+0.00		-$464.75K

Derivative Transactions3

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

11.88K shares

−11.88K

Strike price

12.14

Held after

189.68K

Exercisable

—

10/22/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

11.88K shares

−11.88K

Strike price

12.14

Held after

177.80K

Exercisable

—

10/23/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

11.88K shares

−11.88K

Strike price

12.14

Held after

165.92K

Exercisable

—

10/26/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (right to buy) Direct	Common Stock11.88K shares	10/22/2026	M · Option Exercise	−11.88K	12.14	—	189.68K
Stock Option (right to buy) Direct	Common Stock11.88K shares	10/23/2026	M · Option Exercise	−11.88K	12.14	—	177.80K
Stock Option (right to buy) Direct	Common Stock11.88K shares	10/26/2026	M · Option Exercise	−11.88K	12.14	—	165.92K