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

Open‑market sale worth $1.01M — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 5 sales

RUBINSTEIN JULIE

Filed: 10/6/2026ACC: 0001780664-26-000035

InsiderRUBINSTEIN JULIECIK 1780664

→

IssuerADAPTIVE BIOTECHNOLOGIES CORPCIK 1478320

Officer· President

Since Jun 2019

-35.64K

Net shares

Net seller

$1.01M

Total sold

Open market trades

0B · 5S

Total transactions

35.64K acquired · 71.29K disposed

Non-Derivative Transactions8

Common Stock

Direct

M · Option Exercise

+11.88K

Price / share

$12.14

Trade value

$144.24K

% of position

3.1%

10/1/2026

377.80K→389.68K

Common Stock

Direct

S · Sale

−6.08K

Price / share

$27.57

Trade value

$167.65K

% of position

1.6%

10/1/2026

389.68K→383.60K

Common Stock

Direct

S · Sale

−5.80K

Price / share

$28.56

Trade value

$165.65K

% of position

1.5%

10/1/2026

383.60K→377.80K

Common Stock

Direct

M · Option Exercise

+11.88K

Price / share

$12.14

Trade value

$144.24K

% of position

3.1%

10/2/2026

377.80K→389.68K

Common Stock

Direct

S · Sale

−11.88K

Price / share

$28.13

Trade value

$334.21K

% of position

3.0%

10/2/2026

389.68K→377.80K

Common Stock

Direct

M · Option Exercise

+11.88K

Price / share

$12.14

Trade value

$144.24K

% of position

3.1%

10/5/2026

377.80K→389.68K

Common Stock

Direct

S · Sale

−6.70K

Price / share

$28.82

Trade value

$193.07K

% of position

1.7%

10/5/2026

389.68K→382.98K

Common Stock

Direct

S · Sale

−5.18K

Price / share

$29.67

Trade value

$153.75K

% of position

1.4%

10/5/2026

382.98K→377.80K

Total

Net shares

+0.00

Net value

-$581.62K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	10/1/2026	M · Option Exercise	+11.88K	$12.14	$144.24K	3.1%	377.80K	389.68K
Common Stock Direct	10/1/2026	S · Sale	−6.08K	$27.57	$167.65K	1.6%	389.68K	383.60K
Common Stock Direct	10/1/2026	S · Sale	−5.80K	$28.56	$165.65K	1.5%	383.60K	377.80K
Common Stock Direct	10/2/2026	M · Option Exercise	+11.88K	$12.14	$144.24K	3.1%	377.80K	389.68K
Common Stock Direct	10/2/2026	S · Sale	−11.88K	$28.13	$334.21K	3.0%	389.68K	377.80K
Common Stock Direct	10/5/2026	M · Option Exercise	+11.88K	$12.14	$144.24K	3.1%	377.80K	389.68K
Common Stock Direct	10/5/2026	S · Sale	−6.70K	$28.82	$193.07K	1.7%	389.68K	382.98K
Common Stock Direct	10/5/2026	S · Sale	−5.18K	$29.67	$153.75K	1.4%	382.98K	377.80K
Total			+0.00		-$581.62K

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

367.90K

Exercisable

—

10/1/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

11.88K shares

−11.88K

Strike price

12.14

Held after

356.01K

Exercisable

—

10/2/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

11.88K shares

−11.88K

Strike price

12.14

Held after

344.13K

Exercisable

—

10/5/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (right to buy) Direct	Common Stock11.88K shares	10/1/2026	M · Option Exercise	−11.88K	12.14	—	367.90K
Stock Option (right to buy) Direct	Common Stock11.88K shares	10/2/2026	M · Option Exercise	−11.88K	12.14	—	356.01K
Stock Option (right to buy) Direct	Common Stock11.88K shares	10/5/2026	M · Option Exercise	−11.88K	12.14	—	344.13K