---
schema_version: "secwatch.filing_event.v1"
accession: "0001260221-23-000048"
form_type: "8-K"
ticker: "TDG"
cik: "0001260221"
company_name: "TransDigm Group INC"
filed_at: "2023-05-26T23:59:59+00:00"
generated_at: "2026-06-14T12:35:07.837236+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# TransDigm appoints co-COOs and new CFO; COO Valladares to retire, joins board

## Summary
- COO Jorge Valladares to retire end of FY2023; appointed to Board effective May 26, 2023.
- Mike Lisman (former CFO) and Joel Reiss appointed Co-Chief Operating Officers, effective immediately.
- Sarah Wynne (former Chief Accounting Officer) appointed CFO, continuing as principal accounting officer.
- All promotions are internal; Lisman and Reiss to co-lead operations, Valladares aiding transition.
- Board expanded from 11 to 12 members with Valladares appointment; effective May 26, 2023.

## SEC filing metadata
- accession: 0001260221-23-000048
- form_type: 8-K
- ticker: TDG
- cik: 0001260221
- company_name: TransDigm Group INC
- filed_at: 2023-05-26T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1260221/000126022123000048/0001260221-23-000048-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1260221/000126022123000048/tdg-20230526.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001260221-23-000048
- JSON: https://secwatch.observer/filing/0001260221-23-000048.json
- Plain text: https://secwatch.observer/filing/0001260221-23-000048.txt

## Key facts
- Executive change
  Joel Reiss was appointed as Co-Chief Operating Officer at TransDigm Group INC.
  - Action: appointed
  - Role: Co-Chief Operating Officer
  source text: appointed Michael J. Lisman, the Company’s current Executive Vice President and Chief Financial Officer, and Joel Reiss, an Executive Vice President of the Company, as Co-Chief Operating Officers of the Company, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1260221/000126022123000048/0001260221-23-000048-index.htm
- Executive change
  Jorge L. Valladares III departed as Chief Operating Officer at TransDigm Group INC.
  - Action: retire
  - Role: Chief Operating Officer
  source text: Jorge L. Valladares III, the Company’s current Chief Operating Officer, who will retire from the Company effective September 30, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1260221/000126022123000048/0001260221-23-000048-index.htm
- Executive change
  Michael J. Lisman was appointed as Co-Chief Operating Officer at TransDigm Group INC.
  - Action: appointed
  - Role: Co-Chief Operating Officer
  source text: appointed Michael J. Lisman, the Company’s current Executive Vice President and Chief Financial Officer, and Joel Reiss, an Executive Vice President of the Company, as Co-Chief Operating Officers of the Company, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1260221/000126022123000048/0001260221-23-000048-index.htm
- Executive change
  Jorge L. Valladares III was appointed as Director at TransDigm Group INC.
  - Action: appointed
  - Role: Director
  source text: the Board, upon the recommendation of the Nominating and Corporate Governance Committee (the “Committee”) of the Board, increased the number of Board members from eleven directors to twelve directors and appointed Mr. Valladares to the Board, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1260221/000126022123000048/0001260221-23-000048-index.htm
- Executive change
  Sarah Wynne was appointed as Chief Financial Officer at TransDigm Group INC.
  - Action: appointed
  - Role: Chief Financial Officer
  source text: the Board appointed Sarah Wynne, the Company’s current Chief Accounting Officer, as the Chief Financial Officer of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1260221/000126022123000048/0001260221-23-000048-index.htm

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