---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-25-028421"
form_type: "8-K"
ticker: "LNZA"
cik: "0001843724"
company_name: "LanzaTech Global, Inc."
filed_at: "2025-05-29T23:59:59+00:00"
generated_at: "2026-05-20T06:26:16.950995+00:00"
event_type: "leadership"
sentiment: "positive"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# LanzaTech names Sushmita Koyanagi CFO; GC resigns; board member retires; $1M cost savings

## Summary
- CFO Justin Pugh steps down June 2; CAO Sushmita Koyanagi appointed permanent CFO effective same date.
- GC Joseph Blasko resigns effective June 13; Deputy GC Amanda Fuisz named interim General Counsel.
- Board member Gary Rieschel will not stand for re-election; term ends at July 21, 2025 annual meeting.
- Leadership consolidation expected to reduce annual costs by approximately $1 million.
- Company cites focus on commercial projects for sustainable aviation fuel production.

## SEC filing metadata
- accession: 0001628280-25-028421
- form_type: 8-K
- ticker: LNZA
- cik: 0001843724
- company_name: LanzaTech Global, Inc.
- filed_at: 2025-05-29T23:59:59+00:00
- event_type: leadership
- sentiment: positive
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1843724/000162828025028421/0001628280-25-028421-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1843724/000162828025028421/amci-20250522.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-25-028421
- JSON: https://secwatch.observer/filing/0001628280-25-028421.json
- Plain text: https://secwatch.observer/filing/0001628280-25-028421.txt

## Key facts
- Executive change
  Sushmita Koyanagi was appointed as Chief Financial Officer at LanzaTech Global, Inc..
  - Action: appointed
  - Role: Chief Financial Officer
  source text: Sushmita Koyanagi, the Company’s current Chief Accounting Officer, would take on the position of Chief Financial Officer.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1843724/000162828025028421/0001628280-25-028421-index.htm
- Executive change
  Amanda Koenig Fuisz was appointed as Interim General Counsel at LanzaTech Global, Inc..
  - Action: appointed as interim General Counsel
  - Role: Interim General Counsel
  source text: Amanda Koenig Fuisz, Deputy General Counsel, will serve as interim General Counsel effective as of such date.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1843724/000162828025028421/0001628280-25-028421-index.htm
- Executive change
  Joseph Blasko resigned as General Counsel and Corporate Secretary at LanzaTech Global, Inc..
  - Action: resigned
  - Role: General Counsel and Corporate Secretary
  source text: On May 22, 2025, Joseph Blasko, General Counsel and Corporate Secretary, notified the Company of his decision to resign, effective June 13, 2025, in order to pursue another professional opportunity.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1843724/000162828025028421/0001628280-25-028421-index.htm
- Executive change
  Justin Pugh departed as Interim Chief Financial Officer at LanzaTech Global, Inc..
  - Action: stepped down
  - Role: Interim Chief Financial Officer
  source text: effective June 2, 2025, Justin Pugh would step down from his role as the Company’s interim Chief Financial Officer
  evidence_url: https://www.sec.gov/Archives/edgar/data/1843724/000162828025028421/0001628280-25-028421-index.htm
- Executive change
  Gary Rieschel departed as Member of the Board at LanzaTech Global, Inc..
  - Action: not stand for re-election
  - Role: Member of the Board
  source text: On May 23, 2025, Gary Rieschel notified the Company of his decision to not stand for re-election as a member of the Board.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1843724/000162828025028421/0001628280-25-028421-index.htm

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