---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-25-032651"
form_type: "8-K"
ticker: "LNZA"
cik: "0001843724"
company_name: "LanzaTech Global, Inc."
filed_at: "2025-06-23T23:59:59+00:00"
generated_at: "2026-05-19T00:09:16.278366+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Chief Accounting Officer Michael Heraty resigns; CFO Koyanagi adds duties

## Summary
- Michael Heraty resigned as Chief Accounting Officer effective June 26, 2025.
- Resignation not related to any disagreement on financial reporting or operations.
- CFO Sushmita Koyanagi will assume principal accounting officer role in addition to CFO.
- No new compensatory arrangement was entered into with Ms. Koyanagi for the additional role.

## SEC filing metadata
- accession: 0001628280-25-032651
- form_type: 8-K
- ticker: LNZA
- cik: 0001843724
- company_name: LanzaTech Global, Inc.
- filed_at: 2025-06-23T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1843724/000162828025032651/0001628280-25-032651-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1843724/000162828025032651/amci-20250616.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-25-032651
- JSON: https://secwatch.observer/filing/0001628280-25-032651.json
- Plain text: https://secwatch.observer/filing/0001628280-25-032651.txt

## Key facts
- Executive change
  Michael Heraty resigned as Chief Accounting Officer at LanzaTech Global, Inc..
  - Action: resigned
  - Role: Chief Accounting Officer
  source text: On June 16, 2025, Michael Heraty, the Chief Accounting Officer of LanzaTech Global, Inc. (the “Company”), submitted his resignation, effective as of June 26, 2025.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1843724/000162828025032651/0001628280-25-032651-index.htm
- Executive change
  Sushmita Koyanagi changed role as Chief Financial Officer and principal accounting officer at LanzaTech Global, Inc..
  - Action: assumed responsibilities of principal accounting officer
  - Role: Chief Financial Officer and principal accounting officer
  source text: Sushmita Koyanagi, the Company’s Chief Financial Officer, is expected to assume the responsibilities of principal accounting officer
  evidence_url: https://www.sec.gov/Archives/edgar/data/1843724/000162828025032651/0001628280-25-032651-index.htm

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