---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-22-015606"
form_type: "8-K"
ticker: "CYAN"
cik: "0000768408"
company_name: "CYANOTECH CORP"
filed_at: "2022-06-22T23:59:59+00:00"
generated_at: "2026-06-25T00:09:41.648366+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Gerald Cysewski steps down as CEO of Cyanotech; Matthew Custer named new President and CEO effective June 16, 2022

## Summary
- Gerald Cysewski resigned as CEO and Director effective June 16, 2022; will continue as CEO Emeritus and Chief Scientific Officer.
- Board unanimously appointed Matthew K. Custer as President, CEO, and Director; Custer had been President since May 2021.
- Custer's employment agreement provides $195,000 base salary, $25,000 signing bonus, and 50,000 stock options at $3.43 per share.
- Options vest over three years; agreement runs through June 16, 2025, with automatic renewal.

## SEC filing metadata
- accession: 0001437749-22-015606
- form_type: 8-K
- ticker: CYAN
- cik: 0000768408
- company_name: CYANOTECH CORP
- filed_at: 2022-06-22T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/768408/000143774922015606/0001437749-22-015606-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/768408/000143774922015606/cyan20220617_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-22-015606
- JSON: https://secwatch.observer/filing/0001437749-22-015606.json
- Plain text: https://secwatch.observer/filing/0001437749-22-015606.txt

## Key facts
- Executive change
  Gerald Cysewski resigned as Chief Executive Officer at CYANOTECH CORP.
  - Action: resigned
  - Role: Chief Executive Officer
  source text: Effective as of June 16, 2022, Gerald Cysewski has resigned from his position as Chief Executive Officer of Cyanotech Corporation, a Nevada corporation (the “Company”), and as a Director of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/768408/000143774922015606/0001437749-22-015606-index.htm
- Executive change
  Matthew K. Custer was appointed as President and Chief Executive Officer at CYANOTECH CORP.
  - Action: appointed
  - Role: President and Chief Executive Officer
  source text: Effective immediately upon Mr. Cysewski’s resignation, the Board of the Company has unanimously appointed Matthew K. Custer as President and Chief Executive Officer of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/768408/000143774922015606/0001437749-22-015606-index.htm

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