{"schema_version":"secwatch.filing_event.v1","accession":"0001552000-23-000016","form_type":"8-K","ticker":"MPLX","cik":"0001552000","company_name":"MPLX LP","filed_at":"2023-05-03T23:59:59+00:00","discovered_at":"2026-05-14T18:03:39.358369+00:00","generated_at":"2026-06-16T01:03:12.388165+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Dan D. Sandman retires from MPLX board under mandatory retirement policy","bullets":["Dan D. Sandman retired from the board of MPLX GP LLC, general partner of MPLX LP, on May 1, 2023.","Retirement was required by the mandatory retirement policy in MPLX's Governance Principles.","No replacement director was named in the filing."],"urls":{"canonical":"https://secwatch.observer/filing/0001552000-23-000016","json":"https://secwatch.observer/filing/0001552000-23-000016.json","markdown":"https://secwatch.observer/filing/0001552000-23-000016.md","text":"https://secwatch.observer/filing/0001552000-23-000016.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1552000/000155200023000016/0001552000-23-000016-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1552000/000155200023000016/mplx-20230501.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-16T01:03:12.388165+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":"9a4ac227cf","claim":"Dan D. Sandman retired as member of the board of directors at MPLX LP.","evidence_excerpt":"On May 1, 2023, Dan D. Sandman retired from his service as a member of the board of directors of MPLX GP LLC, a Delaware limited liability company (the “General Partner”) and the general partner of MPLX LP, a Delaware limited partnership (“MPLX”), as required by the mandatory retirement policy set forth in the Governance Principles of MPLX and the General Partner.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1552000/000155200023000016/0001552000-23-000016-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retired"},{"label":"Role","value":"member of the board of directors"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}