SEC Form 4 reporting owner

Robins Harlan S

Robins Harlan S has filed 19 Form 4 transactions reported between December 3, 2025 and July 21, 2026, as Chief Scientific Officer of Adaptive Biotechnologies Corp.

Name as filed: ROBINS HARLAN S

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$29.5M

16 lines

Companies

with Form 4 filings

Latest transaction

Jul 21, 2026

transaction date

Roles and reported holdings

ADPTAdaptive Biotechnologies Corp
Dec 3, 2025 – Jul 21, 2026
Chief Scientific Officer
Held directly812,058 sh as of Jul 21, 2026 · Form 4
24 months: $29.5M sold

Transaction history

All 19 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Jul 21, 2026	ADPTChief Scientific Officer	Open-market saleCode S · direct	213,702	$22.12	$4.7M@ $22.12	812,058	Form 4
Jul 21, 2026	ADPTChief Scientific Officer	Open-market saleCode S · direct	278,698	$21.72	$6.1M@ $21.72	1,025,760	Form 4
Jul 21, 2026	ADPTChief Scientific Officer	Option exerciseCode M · direct	284,800	$6.55	$1.9M@ $6.55	1,304,458	Form 4
Jul 2, 2026	ADPTChief Scientific Officer	Open-market saleCode S · direct	146,889	$22.45	$3.3M@ $22.45	1,019,658	Form 4
Jul 2, 2026	ADPTChief Scientific Officer	Open-market saleCode S · direct	239,351	$21.74	$5.2M@ $21.74	1,166,547	Form 4
Jun 16, 2026	ADPTChief Scientific Officer	Open-market saleCode S · direct	6,160	$18.01	$111K@ $18.01	1,405,898	Form 4
Jun 15, 2026	ADPTChief Scientific Officer	Open-market saleCode S · direct	100,000	$17.37	$1.7M@ $17.37	1,412,058	Form 4
Apr 8, 2026	ADPTChief Scientific Officer	Open-market saleCode S · direct	10,000	$14.85	$149K@ $14.85	1,512,058	Form 4
Mar 11, 2026	ADPTChief Scientific Officer	Open-market saleCode S · directAlso reported by ROBINS CHAD M	329,600	$13.17	$4.3M@ $13.17	1,522,058	Form 4
Mar 11, 2026	ADPTChief Scientific Officer	Open-market saleCode S · direct	140,666	$13.17	$1.9M@ $13.17	1,851,658	Form 4
Mar 6, 2026	ADPTChief Scientific Officer	Grant or awardCode A · direct	709,220	—	—	1,992,324	Form 4
Mar 4, 2026	ADPTChief Scientific Officer	Grant or awardCode A · direct	127,813	—	—	1,283,104	Form 4
Mar 3, 2026	ADPTChief Scientific Officer	Open-market saleCode S · direct	14,233	$16.52	$235K@ $16.52	1,155,291	Form 4
Mar 2, 2026	ADPTChief Scientific Officer	Open-market saleCode S · direct	10,000	$15.72	$157K@ $15.72	1,169,524	Form 4
Feb 3, 2026	ADPTChief Scientific Officer	Open-market saleCode S · direct	8,120	$19.00	$154K@ $19.00	1,179,524	Form 4
Feb 2, 2026	ADPTChief Scientific Officer	Open-market saleCode S · direct	34,668	$18.60	$645K@ $18.60	1,187,644	Form 4
Jan 6, 2026	ADPTChief Scientific Officer	Open-market saleCode S · direct	10,000	$16.44	$164K@ $16.44	1,222,312	Form 4
Dec 4, 2025	ADPTChief Scientific Officer	Open-market saleCode S · direct	10,000	$16.61	$166K@ $16.61	1,232,312	Form 4
Dec 3, 2025	ADPTChief Scientific Officer	Open-market saleCode S · direct	27,212	$18.61	$506K@ $18.61	1,242,312	Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.