---
schema_version: "secwatch.filing_event.v1"
accession: "0001260221-25-000063"
form_type: "8-K"
ticker: "TDG"
cik: "0001260221"
company_name: "TransDigm Group INC"
filed_at: "2025-10-03T23:59:59+00:00"
generated_at: "2026-05-17T04:42:35.985496+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# TransDigm CEO Stein retires, Lisman takes over; consulting deal includes option surrenders

## Summary
- Kevin Stein retired as President & CEO on Sept 30, 2025; Michael Lisman succeeded him.
- Stein remains on Board and entered a 24-month consulting agreement at $25,000/month.
- Stein forfeits 100% of FY25/FY24 and 20% of FY23 stock option grants; remaining options continue to vest.
- Consulting agreement effective Oct 1, 2025, for up to 24 months to support transition.

## SEC filing metadata
- accession: 0001260221-25-000063
- form_type: 8-K
- ticker: TDG
- cik: 0001260221
- company_name: TransDigm Group INC
- filed_at: 2025-10-03T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1260221/000126022125000063/0001260221-25-000063-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1260221/000126022125000063/tdg-20251001.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001260221-25-000063
- JSON: https://secwatch.observer/filing/0001260221-25-000063.json
- Plain text: https://secwatch.observer/filing/0001260221-25-000063.txt

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