{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-24-083409","form_type":"8-K","ticker":"MKSI","cik":"0001049502","company_name":"MKS INC","filed_at":"2024-04-01T23:59:59+00:00","discovered_at":"2026-05-14T18:03:17.038833+00:00","generated_at":"2026-06-04T04:19:09.404751+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"MKS Instruments CFO Seth Bagshaw retires; CEO John Lee assumes interim CFO role","bullets":["Seth H. Bagshaw retired as EVP, CFO & Treasurer on April 1, 2024; remains special advisor until May 1, 2024.","CEO John T.C. Lee assumes interim principal financial officer role; company continues search for permanent CFO.","No material arrangements or family relationships disclosed in connection with Lee's interim appointment."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-24-083409","json":"https://secwatch.observer/filing/0001193125-24-083409.json","markdown":"https://secwatch.observer/filing/0001193125-24-083409.md","text":"https://secwatch.observer/filing/0001193125-24-083409.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1049502/000119312524083409/0001193125-24-083409-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1049502/000119312524083409/d782021d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-04T04:19:09.404751+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":"102adbe339","claim":"John T.C. Lee was appointed as principal financial officer at MKS INC.","evidence_excerpt":"Following Mr. Bagshaw’s retirement, on April 1, 2024, John T.C. Lee, President and Chief Executive Officer of the Company, assumed the role of principal financial officer of the Company on an interim basis while the Company continues its search for Mr. Bagshaw’s successor.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1049502/000119312524083409/0001193125-24-083409-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"assumed"},{"label":"Role","value":"principal financial officer"}],"fact_type":"executive_change"},{"claim_id":"4877a65737","claim":"Seth H. Bagshaw retired as Executive Vice President, Chief Financial Officer and Treasurer at MKS INC.","evidence_excerpt":"As previously announced, on April 1, 2024, Seth H. Bagshaw retired as Executive Vice President, Chief Financial Officer and Treasurer of MKS Instruments, Inc. (the “Company”).","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1049502/000119312524083409/0001193125-24-083409-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retired"},{"label":"Role","value":"Executive Vice President, Chief Financial Officer and Treasurer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}