---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-084748"
form_type: "8-K"
ticker: "ADPT"
cik: "0001478320"
company_name: "Adaptive Biotechnologies Corp"
filed_at: "2024-04-02T23:59:59+00:00"
generated_at: "2026-06-04T03:28:20.361744+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# CFO Tycho Peterson resigns; Kyle Piskel named CFO effective April 8

## Summary
- Tycho Peterson resigned as CFO effective April 5, 2024; resignation voluntary with no disagreement.
- Kyle Piskel, current Principal Accounting Officer and 8-year veteran, appointed CFO starting April 8, 2024.
- No other leadership changes or compensatory arrangements disclosed.

## SEC filing metadata
- accession: 0001193125-24-084748
- form_type: 8-K
- ticker: ADPT
- cik: 0001478320
- company_name: Adaptive Biotechnologies Corp
- filed_at: 2024-04-02T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1478320/000119312524084748/0001193125-24-084748-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1478320/000119312524084748/d821049d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-084748
- JSON: https://secwatch.observer/filing/0001193125-24-084748.json
- Plain text: https://secwatch.observer/filing/0001193125-24-084748.txt

## Key facts
- Executive change
  Kyle Piskel was appointed as Chief Financial Officer at Adaptive Biotechnologies Corp.
  - Action: appointed
  - Role: Chief Financial Officer
  source text: Kyle Piskel, who has been with Company for 8 years and is currently its Principal Accounting Officer will serve as the Chief Financial Officer starting on April 8, 2024.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1478320/000119312524084748/0001193125-24-084748-index.htm
- Executive change
  Tycho Peterson resigned as Chief Financial Officer at Adaptive Biotechnologies Corp.
  - Action: resigned
  - Role: Chief Financial Officer
  source text: On April 1, 2024, the Chief Financial Officer of Adaptive Biotechnologies Corporation (the “ Company ”) Tycho Peterson submitted his resignation.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1478320/000119312524084748/0001193125-24-084748-index.htm

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