Susan Bobulsky - 30 Jul 2026 Form 4 Insider Report for Adaptive Biotechnologies Corp (ADPT)

Reporting relationship: Chief Commercial Officer, MRD
Issuer ticker: ADPT
Reported as of: 30 Jul 2026
Net transaction value: -$31,176
SEC form: 4
Accepted by SEC: 03 Aug 2026, 18:26:46 UTC
Prior SEC filing: 20 Jul 2026
Source filing: View source filing
Reporting owner signature: Susan Bobulsky by Kyle Piskel, Attorney-in-Fact

Key filing fact

Susan Bobulsky filed Form 4 for Adaptive Biotechnologies Corp (ADPT) on 03 Aug 2026.

Key facts

This page summarizes Susan Bobulsky's Form 4 filing for Adaptive Biotechnologies Corp (ADPT).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 03 Aug 2026, 18:26.

Change

Previous filing in this sequence was filed on 20 Jul 2026.
Current net transaction value: -$31,176.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001820885 Primary reporting owner

BOBULSKY SUSAN

Relationship: Chief Commercial Officer, MRD
Address: C/O ADAPTIVE BIOTECHNOLOGIES CORPORATION, 1165 EASTLAKE AVENUE EAST, SEATTLE
Signature: Susan Bobulsky by Kyle Piskel, Attorney-in-Fact
Signature date: 03 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ADPT transaction

Common Stock

Sale

Transaction value: $31,176
Shares: -1,299
Change %: -0.32%
Price: $24.00
Shares after: 399,989
Date: 30 Jul 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 1 footnote

Footnote F1

The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 16, 2025.