{"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","discovered_at":"2026-05-14T18:03:33.150750+00:00","generated_at":"2026-06-12T00:33:59.863072+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Materion CAO Zaranec appointed Division CFO – Performance Materials; CFO Chadwick adds accounting officer role","bullets":["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."],"urls":{"canonical":"https://secwatch.observer/filing/0001104657-23-000127","json":"https://secwatch.observer/filing/0001104657-23-000127.json","markdown":"https://secwatch.observer/filing/0001104657-23-000127.md","text":"https://secwatch.observer/filing/0001104657-23-000127.txt","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"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-12T00:33:59.863072+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"4a720e492a","claim":"John M. Zaranec was appointed as Division Chief Financial Officer – Performance Materials at MATERION Corp.","evidence_excerpt":"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_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1104657/000110465723000127/0001104657-23-000127-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Division Chief Financial Officer – Performance Materials"}],"fact_type":"executive_change"},{"claim_id":"d189f43f42","claim":"Shelly M. Chadwick changed role as principal accounting officer at MATERION Corp.","evidence_excerpt":"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_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1104657/000110465723000127/0001104657-23-000127-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"assumed"},{"label":"Role","value":"principal accounting officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}