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

Open‑market sale worth $897.4K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 5 sales

RUBINSTEIN JULIE

Filed: 10/16/2026ACC: 0001780664-26-000041

InsiderRUBINSTEIN JULIECIK 1780664

→

IssuerADAPTIVE BIOTECHNOLOGIES CORPCIK 1478320

Officer· President

Since Jun 2019

-35.64K

Net shares

Net seller

$897.4K

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%

10/14/2026

377.80K→389.68K

Common Stock

Direct

S · Sale

−6.78K

Price / share

$25.57

Trade value

$173.39K

% of position

1.7%

10/14/2026

389.68K→382.90K

Common Stock

Direct

S · Sale

−5.10K

Price / share

$25.82

Trade value

$131.68K

% of position

1.3%

10/14/2026

382.90K→377.80K

Common Stock

Direct

M · Option Exercise

+11.88K

Price / share

$12.14

Trade value

$144.24K

% of position

3.1%

10/15/2026

377.80K→389.68K

Common Stock

Direct

S · Sale

−11.88K

Price / share

$25.61

Trade value

$304.27K

% of position

3.0%

10/15/2026

389.68K→377.80K

Common Stock

Direct

M · Option Exercise

+11.88K

Price / share

$12.14

Trade value

$144.24K

% of position

3.1%

10/16/2026

377.80K→389.68K

Common Stock

Direct

S · Sale

−11.58K

Price / share

$24.21

Trade value

$280.38K

% of position

3.0%

10/16/2026

389.68K→378.10K

Common Stock

Direct

S · Sale

−300.00

Price / share

$25.45

Trade value

$7.63K

% of position

0.1%

10/16/2026

378.10K→377.80K

Total

Net shares

+0.00

Net value

-$464.65K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	10/14/2026	M · Option Exercise	+11.88K	$12.14	$144.24K	3.1%	377.80K	389.68K
Common Stock Direct	10/14/2026	S · Sale	−6.78K	$25.57	$173.39K	1.7%	389.68K	382.90K
Common Stock Direct	10/14/2026	S · Sale	−5.10K	$25.82	$131.68K	1.3%	382.90K	377.80K
Common Stock Direct	10/15/2026	M · Option Exercise	+11.88K	$12.14	$144.24K	3.1%	377.80K	389.68K
Common Stock Direct	10/15/2026	S · Sale	−11.88K	$25.61	$304.27K	3.0%	389.68K	377.80K
Common Stock Direct	10/16/2026	M · Option Exercise	+11.88K	$12.14	$144.24K	3.1%	377.80K	389.68K
Common Stock Direct	10/16/2026	S · Sale	−11.58K	$24.21	$280.38K	3.0%	389.68K	378.10K
Common Stock Direct	10/16/2026	S · Sale	−300.00	$25.45	$7.63K	0.1%	378.10K	377.80K
Total			+0.00		-$464.65K

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

260.97K

Exercisable

—

10/14/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

11.88K shares

−11.88K

Strike price

12.14

Held after

249.09K

Exercisable

—

10/15/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

11.88K shares

−11.88K

Strike price

12.14

Held after

237.21K

Exercisable

—

10/16/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (right to buy) Direct	Common Stock11.88K shares	10/14/2026	M · Option Exercise	−11.88K	12.14	—	260.97K
Stock Option (right to buy) Direct	Common Stock11.88K shares	10/15/2026	M · Option Exercise	−11.88K	12.14	—	249.09K
Stock Option (right to buy) Direct	Common Stock11.88K shares	10/16/2026	M · Option Exercise	−11.88K	12.14	—	237.21K