---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-253538"
form_type: "8-K"
ticker: "CTKB"
cik: "0001831915"
company_name: "Cytek Biosciences, Inc."
filed_at: "2026-06-02T20:15:52+00:00"
generated_at: "2026-06-02T20:17:52.634735+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Cytek Biosciences SVP Global Sales Philippe Busque resigns effective June 5

## Summary
- Philippe Busque, Ph.D., SVP Global Sales and Services, resigned effective June 5, 2026.
- Resignation is to pursue another career opportunity; not due to disagreement with company operations.
- No successor or interim appointment announced in the filing.

## SEC filing metadata
- accession: 0001193125-26-253538
- form_type: 8-K
- ticker: CTKB
- cik: 0001831915
- company_name: Cytek Biosciences, Inc.
- filed_at: 2026-06-02T20:15:52+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1831915/000119312526253538/0001193125-26-253538-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1831915/000119312526253538/d161903d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-253538
- JSON: https://secwatch.observer/filing/0001193125-26-253538.json
- Plain text: https://secwatch.observer/filing/0001193125-26-253538.txt

## Key facts
- Executive change
  Philippe Busque resigned as Senior Vice President, Global Sales and Services at Cytek Biosciences, Inc..
  - Action: resigned
  - Role: Senior Vice President, Global Sales and Services
  source text: On May 27, 2026, Philippe Busque, Ph.D. submitted his resignation from his position as the Senior Vice President, Global Sales and Services of Cytek Biosciences, Inc. (the “Company”), effective as of June 5, 2026, to pursue another career opportunity.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1831915/000119312526253538/0001193125-26-253538-index.htm

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