RUBINSTEIN JULIE (President) sold 11.1% of their position (57.18K shares) of ADAPTIVE BIOTECHNOLOGIES CORP on the open market

Open‑market sale worth $751.3K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 4 sales

RUBINSTEIN JULIE

Filed: 3/31/2026ACC: 0001780664-26-000018

InsiderRUBINSTEIN JULIECIK 1780664

→

IssuerADAPTIVE BIOTECHNOLOGIES CORPCIK 1478320

Officer· President

Since Jun 2019

-57.18K

Net shares

Net seller

$751.3K

Total sold

Open market trades

0B · 4S

Total transactions

44.17K acquired · 101.35K disposed

Non-Derivative Transactions7

Common Stock

Direct

M · Option Exercise

+14.72K

Price / share

$7.27

Trade value

$107.03K

% of position

3.1%

3/27/2026

468.89K→483.61K

Common Stock

Direct

S · Sale

−2.74K

Price / share

$12.49

Trade value

$34.20K

% of position

0.6%

3/27/2026

483.61K→480.88K

Common Stock

Direct

S · Sale

−16.32K

Price / share

$13.48

Trade value

$220.02K

% of position

3.4%

3/27/2026

480.88K→464.55K

Common Stock

Direct

M · Option Exercise

+14.72K

Price / share

$7.27

Trade value

$107.03K

% of position

3.2%

3/30/2026

464.55K→479.28K

Common Stock

Direct

S · Sale

−19.06K

Price / share

$12.63

Trade value

$240.73K

% of position

4.0%

3/30/2026

479.28K→460.22K

Common Stock

Direct

M · Option Exercise

+14.72K

Price / share

$7.27

Trade value

$107.03K

% of position

3.2%

3/31/2026

460.22K→474.94K

Common Stock

Direct

S · Sale

−19.06K

Price / share

$13.45

Trade value

$256.36K

% of position

4.0%

3/31/2026

474.94K→455.88K

Total

Net shares

−13.01K

Net value

-$430.22K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	3/27/2026	M · Option Exercise	+14.72K	$7.27	$107.03K	3.1%	468.89K	483.61K
Common Stock Direct	3/27/2026	S · Sale	−2.74K	$12.49	$34.20K	0.6%	483.61K	480.88K
Common Stock Direct	3/27/2026	S · Sale	−16.32K	$13.48	$220.02K	3.4%	480.88K	464.55K
Common Stock Direct	3/30/2026	M · Option Exercise	+14.72K	$7.27	$107.03K	3.2%	464.55K	479.28K
Common Stock Direct	3/30/2026	S · Sale	−19.06K	$12.63	$240.73K	4.0%	479.28K	460.22K
Common Stock Direct	3/31/2026	M · Option Exercise	+14.72K	$7.27	$107.03K	3.2%	460.22K	474.94K
Common Stock Direct	3/31/2026	S · Sale	−19.06K	$13.45	$256.36K	4.0%	474.94K	455.88K
Total			−13.01K		-$430.22K

Derivative Transactions3

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

14.72K shares

−14.72K

Strike price

7.27

Held after

140.61K

Exercisable

—

3/27/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

14.72K shares

−14.72K

Strike price

7.27

Held after

125.89K

Exercisable

—

3/30/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

14.72K shares

−14.72K

Strike price

7.27

Held after

111.16K

Exercisable

—

3/31/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (right to buy) Direct	Common Stock14.72K shares	3/27/2026	M · Option Exercise	−14.72K	7.27	—	140.61K
Stock Option (right to buy) Direct	Common Stock14.72K shares	3/30/2026	M · Option Exercise	−14.72K	7.27	—	125.89K
Stock Option (right to buy) Direct	Common Stock14.72K shares	3/31/2026	M · Option Exercise	−14.72K	7.27	—	111.16K