---
schema_version: "secwatch.filing_event.v1"
accession: "0001104657-23-000127"
form_type: "8-K"
ticker: "MTRN"
cik: "0001104657"
company_name: "MATERION Corp"
filed_at: "2023-08-08T23:59:59+00:00"
generated_at: "2026-06-12T00:33:59.863072+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Materion CAO Zaranec appointed Division CFO – Performance Materials; CFO Chadwick adds accounting officer role

## Summary
- John M. Zaranec transitions from Chief Accounting Officer to Division CFO of Performance Materials, effective Aug 28, 2023.
- CFO Shelly M. Chadwick will assume principal accounting officer responsibilities as of the effective date.
- Zaranec remains with the company; no departure or new external hire announced.

## SEC filing metadata
- accession: 0001104657-23-000127
- form_type: 8-K
- ticker: MTRN
- cik: 0001104657
- company_name: MATERION Corp
- filed_at: 2023-08-08T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1104657/000110465723000127/0001104657-23-000127-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1104657/000110465723000127/mtrn-20230804.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104657-23-000127
- JSON: https://secwatch.observer/filing/0001104657-23-000127.json
- Plain text: https://secwatch.observer/filing/0001104657-23-000127.txt

## Key facts
- Executive change
  John M. Zaranec was appointed as Division Chief Financial Officer – Performance Materials at MATERION Corp.
  - Action: appointed
  - Role: Division Chief Financial Officer – Performance Materials
  source text: On August 4, 2023, John M. Zaranec, the Chief Accounting Officer of Materion Corporation (the “Company”), was appointed as Division Chief Financial Officer – Performance Materials, effective as of August 28, 2023 (the “Effective Date”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1104657/000110465723000127/0001104657-23-000127-index.htm
- Executive change
  Shelly M. Chadwick changed role as principal accounting officer at MATERION Corp.
  - Action: assumed
  - Role: principal accounting officer
  source text: Shelly M. Chadwick, the Company’s Chief Financial Officer, will assume the role of the Company’s principal accounting officer as of the Effective Date in connection with Mr. Zaranec’s transition.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1104657/000110465723000127/0001104657-23-000127-index.htm

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