RUBINSTEIN JULIE (President) sold 26.1% of their position (179.70K shares) of ADAPTIVE BIOTECHNOLOGIES CORP on the open market

Open‑market sale worth $2.37M — a significant reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 5 sales

RUBINSTEIN JULIE

Filed: 3/13/2026ACC: 0001780664-26-000008

InsiderRUBINSTEIN JULIECIK 1780664

→

IssuerADAPTIVE BIOTECHNOLOGIES CORPCIK 1478320

Officer· President

Since Jun 2019

-179.70K

Net shares

Net seller

$2.37M

Total sold

Open market trades

0B · 5S

Total transactions

44.17K acquired · 223.87K disposed

Non-Derivative Transactions8

Common Stock

Direct

S · Sale

−122.52K

Price / share

$13.17

Trade value

$1.61M

% of position

19.0%

3/11/2026

643.47K→520.95K

Common Stock

Direct

M · Option Exercise

+14.72K

Price / share

$6.55

Trade value

$96.43K

% of position

2.8%

3/11/2026

520.95K→535.67K

Common Stock

Direct

S · Sale

−19.06K

Price / share

$14.08

Trade value

$268.36K

% of position

3.6%

3/11/2026

535.67K→516.61K

Common Stock

Direct

M · Option Exercise

+14.72K

Price / share

$6.55

Trade value

$96.43K

% of position

2.8%

3/12/2026

516.61K→531.33K

Common Stock

Direct

S · Sale

−13.66K

Price / share

$12.63

Trade value

$172.53K

% of position

2.6%

3/12/2026

531.33K→517.67K

Common Stock

Direct

S · Sale

−5.40K

Price / share

$13.43

Trade value

$72.52K

% of position

1.0%

3/12/2026

517.67K→512.27K

Common Stock

Direct

M · Option Exercise

+14.72K

Price / share

$6.55

Trade value

$96.43K

% of position

2.9%

3/13/2026

512.27K→526.99K

Common Stock

Direct

S · Sale

−19.06K

Price / share

$12.96

Trade value

$247.02K

% of position

3.6%

3/13/2026

526.99K→507.93K

Total

Net shares

−135.54K

Net value

-$2.08M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	3/11/2026	S · Sale	−122.52K	$13.17	$1.61M	19.0%	643.47K	520.95K
Common Stock Direct	3/11/2026	M · Option Exercise	+14.72K	$6.55	$96.43K	2.8%	520.95K	535.67K
Common Stock Direct	3/11/2026	S · Sale	−19.06K	$14.08	$268.36K	3.6%	535.67K	516.61K
Common Stock Direct	3/12/2026	M · Option Exercise	+14.72K	$6.55	$96.43K	2.8%	516.61K	531.33K
Common Stock Direct	3/12/2026	S · Sale	−13.66K	$12.63	$172.53K	2.6%	531.33K	517.67K
Common Stock Direct	3/12/2026	S · Sale	−5.40K	$13.43	$72.52K	1.0%	517.67K	512.27K
Common Stock Direct	3/13/2026	M · Option Exercise	+14.72K	$6.55	$96.43K	2.9%	512.27K	526.99K
Common Stock Direct	3/13/2026	S · Sale	−19.06K	$12.96	$247.02K	3.6%	526.99K	507.93K
Total			−135.54K		-$2.08M

Derivative Transactions3

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

14.72K shares

−14.72K

Strike price

6.55

Held after

92.27K

Exercisable

—

3/11/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

14.72K shares

−14.72K

Strike price

6.55

Held after

77.55K

Exercisable

—

3/12/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

14.72K shares

−14.72K

Strike price

6.55

Held after

62.83K

Exercisable

—

3/13/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (right to buy) Direct	Common Stock14.72K shares	3/11/2026	M · Option Exercise	−14.72K	6.55	—	92.27K
Stock Option (right to buy) Direct	Common Stock14.72K shares	3/12/2026	M · Option Exercise	−14.72K	6.55	—	77.55K
Stock Option (right to buy) Direct	Common Stock14.72K shares	3/13/2026	M · Option Exercise	−14.72K	6.55	—	62.83K