SEC Form 4 reporting owner

Bobulsky Susan

Bobulsky Susan has filed 11 Form 4 transactions reported between March 4, 2026 and September 15, 2026, as Chief Commercial Officer, MRD of Adaptive Biotechnologies Corp.

Name as filed: BOBULSKY SUSAN

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$1.2M

9 lines

Companies

with Form 4 filings

Latest transaction

Sep 15, 2026

transaction date

Roles and reported holdings

ADPTAdaptive Biotechnologies Corp
Mar 4, 2026 – Sep 15, 2026
Chief Commercial Officer, MRD
Held directly395,794 sh as of Sep 15, 2026 · Form 4
24 months: $1.2M sold

Transaction history

All 11 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Sep 15, 2026	ADPTChief Commercial Officer, MRD	Open-market saleCode S · direct	1,195	$27.00	$32K@ $27.00	395,794	Form 4
Aug 10, 2026	ADPTChief Commercial Officer, MRD	Open-market saleCode S · direct	3,000	$25.00	$75K@ $25.00	396,989	Form 4
Jul 30, 2026	ADPTChief Commercial Officer, MRD	Open-market saleCode S · direct	1,299	$24.00	$31K@ $24.00	399,989	Form 4
Jul 16, 2026	ADPTChief Commercial Officer, MRD	Open-market saleCode S · direct	5,000	$23.00	$115K@ $23.00	401,288	Form 4
Jul 1, 2026	ADPTChief Commercial Officer, MRD	Open-market saleCode S · direct	487	$22.00	$11K@ $22.00	406,288	Form 4
Jun 25, 2026	ADPTChief Commercial Officer, MRD	Open-market saleCode S · direct	5,000	$20.50	$103K@ $20.50	406,775	Form 4
Jun 11, 2026	ADPTChief Commercial Officer, MRD	Open-market saleCode S · direct	5,000	$19.00	$95K@ $19.00	411,775	Form 4
Jun 4, 2026	ADPTChief Commercial Officer, MRD	Open-market saleCode S · direct	11,000	$18.00	$198K@ $18.00	416,775	Form 4
Mar 11, 2026	ADPTChief Commercial Officer, MRD	Open-market saleCode S · direct	41,338	$13.17	$544K@ $13.17	427,775	Form 4
Mar 4, 2026	ADPTChief Commercial Officer, MRD	Grant or awardCode A · direct	62,500	—	—	469,113	Form 4
Mar 4, 2026	ADPTChief Commercial Officer, MRD	Grant or awardCode A · direct	59,375	—	—	406,613	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.