---
schema_version: "secwatch.filing_event.v1"
accession: "0000089439-25-000037"
form_type: "8-K"
ticker: "MLI"
cik: "0000089439"
company_name: "MUELLER INDUSTRIES INC"
filed_at: "2025-06-10T23:59:59+00:00"
generated_at: "2026-05-19T16:35:09.481071+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Mueller Industries CMO Steffen Sigloch transitions to Strategic Advisor effective Aug 1, 2025

## Summary
- Effective August 1, 2025, Steffen Sigloch steps down as Chief Manufacturing Officer.
- He will continue as Strategic Advisor for Industry Relations, leveraging expertise gained before and at Mueller.
- No replacement named; Sigloch will advise on projects using specialized knowledge.
- Role change is not a departure; Sigloch remains with the company in an advisory capacity.

## SEC filing metadata
- accession: 0000089439-25-000037
- form_type: 8-K
- ticker: MLI
- cik: 0000089439
- company_name: MUELLER INDUSTRIES INC
- filed_at: 2025-06-10T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/89439/000008943925000037/0000089439-25-000037-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/89439/000008943925000037/mli-20250610.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000089439-25-000037
- JSON: https://secwatch.observer/filing/0000089439-25-000037.json
- Plain text: https://secwatch.observer/filing/0000089439-25-000037.txt

## Key facts
- Executive change
  Steffen Sigloch changed role as Strategic Advisor for Industry Relations at MUELLER INDUSTRIES INC.
  - Action: transitioned
  - Role: Strategic Advisor for Industry Relations
  source text: Effective August 1, 2025, Steffen Sigloch will transition from his position as Chief Manufacturing Officer of Mueller Industries, Inc. (the “Company”) and continue in the role of Strategic Advisor for Industry Relations.
  evidence_url: https://www.sec.gov/Archives/edgar/data/89439/000008943925000037/0000089439-25-000037-index.htm

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