RUBINSTEIN JULIE (President) sold 14.9% of their position (69.06K 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 · 3 sales

RUBINSTEIN JULIE

Filed: 4/21/2026ACC: 0001780664-26-000028

InsiderRUBINSTEIN JULIECIK 1780664

→

IssuerADAPTIVE BIOTECHNOLOGIES CORPCIK 1478320

Officer· President

Since Jun 2019

-69.06K

Net shares

Net seller

$1.01M

Total sold

Open market trades

0B · 3S

Total transactions

56.05K acquired · 125.11K disposed

Non-Derivative Transactions7

Common Stock

Direct

M · Option Exercise

+14.72K

Price / share

$8.46

Trade value

$124.55K

% of position

3.6%

4/17/2026

408.16K→422.88K

Common Stock

Direct

S · Sale

−19.06K

Price / share

$14.57

Trade value

$277.70K

% of position

4.5%

4/17/2026

422.88K→403.82K

Common Stock

Direct

M · Option Exercise

+14.72K

Price / share

$8.46

Trade value

$124.55K

% of position

3.6%

4/20/2026

403.82K→418.54K

Common Stock

Direct

S · Sale

−19.06K

Price / share

$14.55

Trade value

$277.32K

% of position

4.6%

4/20/2026

418.54K→399.48K

Common Stock

Direct

M · Option Exercise

+14.72K

Price / share

$8.46

Trade value

$124.55K

% of position

3.7%

4/21/2026

399.48K→414.21K

Common Stock

Direct

M · Option Exercise

+11.88K

Price / share

$12.14

Trade value

$144.24K

% of position

2.9%

4/21/2026

414.21K→426.09K

Common Stock

Direct

S · Sale

−30.94K

Price / share

$14.66

Trade value

$453.60K

% of position

7.3%

4/21/2026

426.09K→395.15K

Total

Net shares

−13.01K

Net value

-$490.74K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	4/17/2026	M · Option Exercise	+14.72K	$8.46	$124.55K	3.6%	408.16K	422.88K
Common Stock Direct	4/17/2026	S · Sale	−19.06K	$14.57	$277.70K	4.5%	422.88K	403.82K
Common Stock Direct	4/20/2026	M · Option Exercise	+14.72K	$8.46	$124.55K	3.6%	403.82K	418.54K
Common Stock Direct	4/20/2026	S · Sale	−19.06K	$14.55	$277.32K	4.6%	418.54K	399.48K
Common Stock Direct	4/21/2026	M · Option Exercise	+14.72K	$8.46	$124.55K	3.7%	399.48K	414.21K
Common Stock Direct	4/21/2026	M · Option Exercise	+11.88K	$12.14	$144.24K	2.9%	414.21K	426.09K
Common Stock Direct	4/21/2026	S · Sale	−30.94K	$14.66	$453.60K	7.3%	426.09K	395.15K
Total			−13.01K		-$490.74K

Derivative Transactions4

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

14.72K shares

−14.72K

Strike price

8.46

Held after

134.05K

Exercisable

—

4/17/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

14.72K shares

−14.72K

Strike price

8.46

Held after

119.33K

Exercisable

—

4/20/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

14.72K shares

−14.72K

Strike price

8.46

Held after

104.60K

Exercisable

—

4/21/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

11.88K shares

−11.88K

Strike price

12.14

Held after

379.78K

Exercisable

—

4/21/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (right to buy) Direct	Common Stock14.72K shares	4/17/2026	M · Option Exercise	−14.72K	8.46	—	134.05K
Stock Option (right to buy) Direct	Common Stock14.72K shares	4/20/2026	M · Option Exercise	−14.72K	8.46	—	119.33K
Stock Option (right to buy) Direct	Common Stock14.72K shares	4/21/2026	M · Option Exercise	−14.72K	8.46	—	104.60K
Stock Option (right to buy) Direct	Common Stock11.88K shares	4/21/2026	M · Option Exercise	−11.88K	12.14	—	379.78K