---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-097389"
form_type: "8-K"
ticker: "ADPT"
cik: "0001478320"
company_name: "Adaptive Biotechnologies Corp"
filed_at: "2023-04-11T23:59:59+00:00"
generated_at: "2026-06-17T03:36:14.698961+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Adaptive Biotech COO Mark Adams terminated; duties absorbed by President Rubinstein

## Summary
- Mark Adams, COO, was informed on April 7, 2023, that his service will be terminated by May 2023.
- President Julie Rubinstein will assume the Chief Operating Officer's duties.
- No replacement COO has been named; organizational impact remains unclear.
- Chad Robins continues as CEO; leadership transition underway.

## SEC filing metadata
- accession: 0001193125-23-097389
- form_type: 8-K
- ticker: ADPT
- cik: 0001478320
- company_name: Adaptive Biotechnologies Corp
- filed_at: 2023-04-11T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1478320/000119312523097389/0001193125-23-097389-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1478320/000119312523097389/d497018d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-097389
- JSON: https://secwatch.observer/filing/0001193125-23-097389.json
- Plain text: https://secwatch.observer/filing/0001193125-23-097389.txt

## Key facts
- Executive change
  Mark Adams was terminated as Chief Operating Officer at Adaptive Biotechnologies Corp.
  - Action: terminated
  - Role: Chief Operating Officer
  source text: On April 7, 2023, Mark Adams, Chief Operating Officer of Adaptive Biotechnologies Corporation (the “Company”), was informed that his service is being terminated by May 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1478320/000119312523097389/0001193125-23-097389-index.htm

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