---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-407330"
form_type: "8-K"
ticker: "CTKB"
cik: "0001831915"
company_name: "Cytek Biosciences, Inc."
filed_at: "2026-09-29T20:06:24+00:00"
generated_at: "2026-10-12T13:48:22.696362+00:00"
event_type: "regulatory"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Cytek Biosciences board adopts amended and restated bylaws effective September 23, 2026

## Summary
- Board unanimously adopted amended and restated bylaws on September 23, 2026, effective immediately; Exhibit 3.1 attached to the 8-K.
- Changes include removing Rule 14a-8 prefatory clause and adding disclosure/representation requirements for stockholder proposal proponents and director nominees.
- Bylaws expand chairperson authority to disregard non-compliant nominations and incorporate Rule 14a-19 universal proxy rules; add special meeting advance notice procedures.
- Also update adjournment notices for virtual/remote meetings and stockholder list procedures under Delaware General Corporation Law; CEO Wenbin Jiang signed on September 29, 2026.

## SEC filing metadata
- accession: 0001193125-26-407330
- form_type: 8-K
- ticker: CTKB
- cik: 0001831915
- company_name: Cytek Biosciences, Inc.
- filed_at: 2026-09-29T20:06:24+00:00
- event_type: regulatory
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1831915/000119312526407330/0001193125-26-407330-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1831915/000119312526407330/d94407d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-407330
- JSON: https://secwatch.observer/filing/0001193125-26-407330.json
- Plain text: https://secwatch.observer/filing/0001193125-26-407330.txt

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