---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-263844"
form_type: "8-K"
ticker: "ADPT"
cik: "0001478320"
company_name: "Adaptive Biotechnologies Corp"
filed_at: "2026-06-09T20:30:16+00:00"
generated_at: "2026-06-09T20:37:33.258042+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.15
calibrated_materiality_score: 0.15
confidence: "high"
source: SEC EDGAR
---

# Adaptive Biotechnologies annual meeting results: directors elected, say-on-pay approved, auditor ratified

## Summary
- Robert Hershberg elected Class I director with 71.81% of votes cast; 13.6M broker non-votes.
- Katey Owen elected Class I director with 97.72% of votes cast.
- Advisory vote on 2025 named executive officer compensation passed with 96.55% approval.
- Ratification of Ernst & Young as auditor for FY 2026 approved with 99.50% of votes.

## SEC filing metadata
- accession: 0001193125-26-263844
- form_type: 8-K
- ticker: ADPT
- cik: 0001478320
- company_name: Adaptive Biotechnologies Corp
- filed_at: 2026-06-09T20:30:16+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.15
- calibrated_materiality_score: 0.15
- confidence: high
- sec_items: 5.07
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1478320/000119312526263844/0001193125-26-263844-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1478320/000119312526263844/adpt-20260605.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-263844
- JSON: https://secwatch.observer/filing/0001193125-26-263844.json
- Plain text: https://secwatch.observer/filing/0001193125-26-263844.txt

## Key facts
- Shareholder Votes
  Adaptive Biotechnologies Corp shareholders approved Advisory request concerning compensation for the Company's 2025 named executive officers at the 2026-06-05 meeting.
  - Proposal: say on pay
  - Outcome: passed
  - Meeting: 2026-06-05
  source text: Proposal 2: an advisory request concerning compensation for the Company's 2025 named executive officers
  evidence_url: https://www.sec.gov/Archives/edgar/data/1478320/000119312526263844/0001193125-26-263844-index.htm
- Shareholder Votes
  Adaptive Biotechnologies Corp shareholders approved Ratification of Ernst & Young LLP as the Company's independent registered public accounting firm for the year ending December 31, 2026 at the 2026-06-05 meeting.
  - Proposal: auditor ratification
  - Outcome: passed
  - Meeting: 2026-06-05
  source text: Proposal 3: Ramification of Ernst & Young LLP as the Company's Independent Registered Public Accounting Firm for the Year Ending December 31, 2026
  evidence_url: https://www.sec.gov/Archives/edgar/data/1478320/000119312526263844/0001193125-26-263844-index.htm
- Shareholder Votes
  Adaptive Biotechnologies Corp shareholders approved Election of two Class I directors to the Board of Directors (Robert Hershberg, PhD, MD and Katey Owen, PhD) at the 2026-06-05 meeting.
  - Proposal: director election
  - Outcome: passed
  - Meeting: 2026-06-05
  source text: Proposal 1: election of two Class I directors to the Board of Directors (Robert Hershberg, PhD, MD and Katey Owen, PhD)
  evidence_url: https://www.sec.gov/Archives/edgar/data/1478320/000119312526263844/0001193125-26-263844-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.