{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-23-282759","form_type":"8-K","ticker":null,"cik":"0001524741","company_name":"U.S. SILICA HOLDINGS, INC.","filed_at":"2023-11-24T23:59:59+00:00","discovered_at":"2026-05-14T18:03:29.362592+00:00","generated_at":"2026-06-07T21:51:20.012014+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"CFO Donald A. Merril terminated without cause effective October 20, 2023; separation agreement signed November 17","bullets":["Merril receives lump sum of $440,000 (annual base salary), plus 12 months COBRA continuation.","Unvested time-based RSUs (totaling 47,067 shares) will vest within 30 days of execution.","PSUs will vest on pro-rata basis based on actual performance for the full performance period.","Vested stock options exercisable until 90 days after Oct 20 or original expiration.","Merril released all claims and reaffirms non-compete/non-solicitation obligations."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-23-282759","json":"https://secwatch.observer/filing/0001193125-23-282759.json","markdown":"https://secwatch.observer/filing/0001193125-23-282759.md","text":"https://secwatch.observer/filing/0001193125-23-282759.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1524741/000119312523282759/0001193125-23-282759-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1524741/000119312523282759/d892389d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-07T21:51:20.012014+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":"a63da7d5e7","claim":"Donald A. Merril departed as Executive Vice President and Chief Financial Officer at U.S. SILICA HOLDINGS, INC..","evidence_excerpt":"Donald A. Merril, the Company’s Executive Vice President and Chief Financial Officer, was terminated without cause effective October 20, 2023","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1524741/000119312523282759/0001193125-23-282759-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"terminated without cause"},{"label":"Role","value":"Executive Vice President and Chief Financial Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}