---
schema_version: "secwatch.filing_event.v1"
accession: "0001260221-25-000065"
form_type: "8-K"
ticker: "TDG"
cik: "0001260221"
company_name: "TransDigm Group INC"
filed_at: "2025-10-06T23:59:59+00:00"
generated_at: "2026-05-17T04:32:59.696939+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# TransDigm completes $765M acquisition of Simmonds Precision from RTX

## Summary
- Acquisition of Simmonds Precision Products (fuel & proximity sensing, structural health monitoring) closed for ~$765M cash.
- Deal financed entirely through cash on hand; previously announced on June 30, 2025.
- Simmonds expected to generate ~$350M revenue in 2025; ~40% from aftermarket, nearly all proprietary products.
- Simmonds employs ~900 people, headquartered in Vergennes, Vermont.
- RTX Corporation (NYSE: RTX) sold the Goodrich Corporation business unit.

## SEC filing metadata
- accession: 0001260221-25-000065
- form_type: 8-K
- ticker: TDG
- cik: 0001260221
- company_name: TransDigm Group INC
- filed_at: 2025-10-06T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1260221/000126022125000065/0001260221-25-000065-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1260221/000126022125000065/tdg-20251006.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001260221-25-000065
- JSON: https://secwatch.observer/filing/0001260221-25-000065.json
- Plain text: https://secwatch.observer/filing/0001260221-25-000065.txt

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