---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-027702"
form_type: "8-K"
ticker: "ADPT"
cik: "0001478320"
company_name: "Adaptive Biotechnologies Corp"
filed_at: "2023-06-13T23:59:59+00:00"
generated_at: "2026-06-14T01:58:42.905418+00:00"
event_type: "leadership"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Director Robert Hershberg fails to win majority support at AGM; Leslie Trigg resigns

## Summary
- Robert Hershberg received 44.02% for, 55.97% withhold/abstain in Class 1 director election; Katey Owen elected with 76.66%.
- Leslie Trigg voluntarily resigned from board effective June 9, 2023; no disagreement with company.
- Advisory vote on 2022 NEO compensation passed with 82.68% support.
- Ernst & Young ratified as independent auditor for FY2023 with 99.72% shareholder approval.

## SEC filing metadata
- accession: 0000950170-23-027702
- form_type: 8-K
- ticker: ADPT
- cik: 0001478320
- company_name: Adaptive Biotechnologies Corp
- filed_at: 2023-06-13T23:59:59+00:00
- event_type: leadership
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02, 5.07
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1478320/000095017023027702/0000950170-23-027702-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1478320/000095017023027702/adpt-20230609.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-027702
- JSON: https://secwatch.observer/filing/0000950170-23-027702.json
- Plain text: https://secwatch.observer/filing/0000950170-23-027702.txt

## Key facts
- Executive change
  Leslie Trigg resigned as Director at Adaptive Biotechnologies Corp.
  - Action: resigned
  - Role: Director
  source text: On June 9, 2023, Adaptive Biotechnologies Corporation (the " Company ") Board of Directors (the " Board ") member Leslie Trigg submitted her resignation from the Board.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1478320/000095017023027702/0000950170-23-027702-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, 2023 at the 2023-06-09 meeting.
  - Proposal: auditor ratification
  - Outcome: passed
  - Meeting: 2023-06-09
  source text: Proposal 3: Ramification of Ernst & Young LLP as the Company's Independent Registered Public Accounting Firm for the Year Ending December 31, 2023 Votes Submitted As % of Proposal Votes Broker Non Vote For 121,162,529 99.72 % 0 Against 200,965 0.16 % Withhold/Abstain 138,671 0.11 %
  evidence_url: https://www.sec.gov/Archives/edgar/data/1478320/000095017023027702/0000950170-23-027702-index.htm
- Shareholder Votes
  Adaptive Biotechnologies Corp shareholders approved Election of two Class 1 directors to the Board (Drs. Katey Owen and Robert Hershberg) at the 2023-06-09 meeting.
  - Proposal: director election
  - Outcome: passed
  - Meeting: 2023-06-09
  source text: Proposal 1: Election of Class 1 Directors Dr. Katey Owen Votes Submitted As % of Proposal Votes Broker Non Vote For 83,072,262 76.66 % 13,147,625 Against - - Withhold/Abstain 25,282,278 23.33 % Dr. Robert Hershberg Votes Submitted As % of Proposal Votes Broker Non Vote For 47,703,083 44.02 % 13,147,625 Against - - Withhold/Abstain 60,651,457 55.97 %
  evidence_url: https://www.sec.gov/Archives/edgar/data/1478320/000095017023027702/0000950170-23-027702-index.htm
- Shareholder Votes
  Adaptive Biotechnologies Corp shareholders approved Advisory vote concerning the 2022 compensation of the Company's named executive officers at the 2023-06-09 meeting.
  - Proposal: say on pay
  - Outcome: passed
  - Meeting: 2023-06-09
  source text: Proposal 2: Advisory Vote Concerning the 2022 Compensation of the Company's Named Executive Officers Votes Submitted As % of Proposal Votes Broker Non Vote For 89,592,587 82.68 % 13,147,625 Against 17,467,529 16.12 % Withhold/Abstain 1,294,424 1.19 %
  evidence_url: https://www.sec.gov/Archives/edgar/data/1478320/000095017023027702/0000950170-23-027702-index.htm

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