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

Open‑market sale worth $948.2K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 6 sales

RUBINSTEIN JULIE

Filed: 10/8/2026ACC: 0001780664-26-000037

InsiderRUBINSTEIN JULIECIK 1780664

→

IssuerADAPTIVE BIOTECHNOLOGIES CORPCIK 1478320

Officer· President

Since Jun 2019

-35.64K

Net shares

Net seller

$948.2K

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%

10/6/2026

377.80K→389.68K

Common Stock

Direct

S · Sale

−9.38K

Price / share

$27.36

Trade value

$256.66K

% of position

2.4%

10/6/2026

389.68K→380.30K

Common Stock

Direct

S · Sale

−1.10K

Price / share

$28.21

Trade value

$31.03K

% of position

0.3%

10/6/2026

380.30K→379.20K

Common Stock

Direct

S · Sale

−901.00

Price / share

$29.71

Trade value

$26.77K

% of position

0.2%

10/6/2026

379.20K→378.30K

Common Stock

Direct

S · Sale

−499.00

Price / share

$30.53

Trade value

$15.23K

% of position

0.1%

10/6/2026

378.30K→377.80K

Common Stock

Direct

M · Option Exercise

+11.88K

Price / share

$12.14

Trade value

$144.24K

% of position

3.1%

10/7/2026

377.80K→389.68K

Common Stock

Direct

S · Sale

−11.88K

Price / share

$26.40

Trade value

$313.66K

% of position

3.0%

10/7/2026

389.68K→377.80K

Common Stock

Direct

M · Option Exercise

+11.88K

Price / share

$12.14

Trade value

$144.24K

% of position

3.1%

10/8/2026

377.80K→389.68K

Common Stock

Direct

S · Sale

−11.88K

Price / share

$25.66

Trade value

$304.87K

% of position

3.0%

10/8/2026

389.68K→377.80K

Total

Net shares

+0.00

Net value

-$515.52K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	10/6/2026	M · Option Exercise	+11.88K	$12.14	$144.24K	3.1%	377.80K	389.68K
Common Stock Direct	10/6/2026	S · Sale	−9.38K	$27.36	$256.66K	2.4%	389.68K	380.30K
Common Stock Direct	10/6/2026	S · Sale	−1.10K	$28.21	$31.03K	0.3%	380.30K	379.20K
Common Stock Direct	10/6/2026	S · Sale	−901.00	$29.71	$26.77K	0.2%	379.20K	378.30K
Common Stock Direct	10/6/2026	S · Sale	−499.00	$30.53	$15.23K	0.1%	378.30K	377.80K
Common Stock Direct	10/7/2026	M · Option Exercise	+11.88K	$12.14	$144.24K	3.1%	377.80K	389.68K
Common Stock Direct	10/7/2026	S · Sale	−11.88K	$26.40	$313.66K	3.0%	389.68K	377.80K
Common Stock Direct	10/8/2026	M · Option Exercise	+11.88K	$12.14	$144.24K	3.1%	377.80K	389.68K
Common Stock Direct	10/8/2026	S · Sale	−11.88K	$25.66	$304.87K	3.0%	389.68K	377.80K
Total			+0.00		-$515.52K

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

332.25K

Exercisable

—

10/6/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

11.88K shares

−11.88K

Strike price

12.14

Held after

320.37K

Exercisable

—

10/7/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

11.88K shares

−11.88K

Strike price

12.14

Held after

308.49K

Exercisable

—

10/8/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (right to buy) Direct	Common Stock11.88K shares	10/6/2026	M · Option Exercise	−11.88K	12.14	—	332.25K
Stock Option (right to buy) Direct	Common Stock11.88K shares	10/7/2026	M · Option Exercise	−11.88K	12.14	—	320.37K
Stock Option (right to buy) Direct	Common Stock11.88K shares	10/8/2026	M · Option Exercise	−11.88K	12.14	—	308.49K