---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-25-030028"
form_type: "8-K/A"
ticker: "LNZA"
cik: "0001843724"
company_name: "LanzaTech Global, Inc."
filed_at: "2025-06-06T23:59:59+00:00"
generated_at: "2026-05-19T18:35:13.090336+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# LanzaTech amends CFO disclosure; Koyanagi receives $60K retention award

## Summary
- Justin Pugh stepped down as interim CFO effective June 2; Sushmita Koyanagi appointed CFO.
- On June 4, Koyanagi entered a promotion letter with a $60K cash retention award contingent on service through Dec 31, 2025.
- Retention award satisfies part of prior sign-on awards; total sign-on awards now $135K in cash.

## SEC filing metadata
- accession: 0001628280-25-030028
- form_type: 8-K/A
- ticker: LNZA
- cik: 0001843724
- company_name: LanzaTech Global, Inc.
- filed_at: 2025-06-06T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1843724/000162828025030028/0001628280-25-030028-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1843724/000162828025030028/amci-20250522.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-25-030028
- JSON: https://secwatch.observer/filing/0001628280-25-030028.json
- Plain text: https://secwatch.observer/filing/0001628280-25-030028.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 then-current Chief Accounting Officer, would take on the position of Chief Financial Officer.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1843724/000162828025030028/0001628280-25-030028-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: 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/1843724/000162828025030028/0001628280-25-030028-index.htm

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