RUBINSTEIN JULIE (President) sold 10.6% of their position (57.18K shares) of ADAPTIVE BIOTECHNOLOGIES CORP on the open market

Open‑market sale worth $769.6K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 3 sales

RUBINSTEIN JULIE

Filed: 3/23/2026ACC: 0001780664-26-000014

InsiderRUBINSTEIN JULIECIK 1780664

→

IssuerADAPTIVE BIOTECHNOLOGIES CORPCIK 1478320

Officer· President

Since Jun 2019

-57.18K

Net shares

Net seller

$769.6K

Total sold

Open market trades

0B · 3S

Total transactions

44.17K acquired · 101.35K disposed

Non-Derivative Transactions7

Common Stock

Direct

M · Option Exercise

+14.72K

Price / share

$6.55

Trade value

$96.43K

% of position

3.0%

3/19/2026

494.92K→509.64K

Common Stock

Direct

S · Sale

−19.06K

Price / share

$13.18

Trade value

$251.21K

% of position

3.7%

3/19/2026

509.64K→490.58K

Common Stock

Direct

M · Option Exercise

+3.94K

Price / share

$6.55

Trade value

$25.80K

% of position

0.8%

3/20/2026

490.58K→494.52K

Common Stock

Direct

M · Option Exercise

+10.78K

Price / share

$7.27

Trade value

$78.39K

% of position

2.2%

3/20/2026

494.52K→505.30K

Common Stock

Direct

S · Sale

−19.06K

Price / share

$13.37

Trade value

$254.83K

% of position

3.8%

3/20/2026

505.30K→486.24K

Common Stock

Direct

M · Option Exercise

+14.72K

Price / share

$7.27

Trade value

$107.03K

% of position

3.0%

3/23/2026

486.24K→500.97K

Common Stock

Direct

S · Sale

−19.06K

Price / share

$13.83

Trade value

$263.60K

% of position

3.8%

3/23/2026

500.97K→481.91K

Total

Net shares

−13.01K

Net value

-$461.99K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	3/19/2026	M · Option Exercise	+14.72K	$6.55	$96.43K	3.0%	494.92K	509.64K
Common Stock Direct	3/19/2026	S · Sale	−19.06K	$13.18	$251.21K	3.7%	509.64K	490.58K
Common Stock Direct	3/20/2026	M · Option Exercise	+3.94K	$6.55	$25.80K	0.8%	490.58K	494.52K
Common Stock Direct	3/20/2026	M · Option Exercise	+10.78K	$7.27	$78.39K	2.2%	494.52K	505.30K
Common Stock Direct	3/20/2026	S · Sale	−19.06K	$13.37	$254.83K	3.8%	505.30K	486.24K
Common Stock Direct	3/23/2026	M · Option Exercise	+14.72K	$7.27	$107.03K	3.0%	486.24K	500.97K
Common Stock Direct	3/23/2026	S · Sale	−19.06K	$13.83	$263.60K	3.8%	500.97K	481.91K
Total			−13.01K		-$461.99K

Derivative Transactions4

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

14.72K shares

−14.72K

Strike price

6.55

Held after

3.94K

Exercisable

—

3/19/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

3.94K shares

−3.94K

Strike price

6.55

Held after

0.00

Exercisable

—

3/20/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

10.78K shares

−10.78K

Strike price

7.27

Held after

214.22K

Exercisable

—

3/20/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

14.72K shares

−14.72K

Strike price

7.27

Held after

199.50K

Exercisable

—

3/23/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (right to buy) Direct	Common Stock14.72K shares	3/19/2026	M · Option Exercise	−14.72K	6.55	—	3.94K
Stock Option (right to buy) Direct	Common Stock3.94K shares	3/20/2026	M · Option Exercise	−3.94K	6.55	—	0.00
Stock Option (right to buy) Direct	Common Stock10.78K shares	3/20/2026	M · Option Exercise	−10.78K	7.27	—	214.22K
Stock Option (right to buy) Direct	Common Stock14.72K shares	3/23/2026	M · Option Exercise	−14.72K	7.27	—	199.50K