{"schema_version":"secwatch.filing_event.v1","accession":"0001288847-25-000063","form_type":"8-K","ticker":"FIVN","cik":"0001288847","company_name":"Five9, Inc.","filed_at":"2025-03-24T23:59:59+00:00","discovered_at":"2026-05-14T18:03:03.223983+00:00","generated_at":"2026-05-24T06:22:07.416253+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Five9: Director Acosta to leave board; Mariner moves to Class II; board size reduced to nine","bullets":["Jack Acosta not nominated for re-election at May 21, 2025 annual meeting.","Jonathan Mariner resigned Class III, reappointed Class II director effective March 19.","Board size to be reduced to nine directors, Class II to three, at conclusion of annual meeting.","Maria Walker to succeed as Audit Committee chair after the annual meeting."],"urls":{"canonical":"https://secwatch.observer/filing/0001288847-25-000063","json":"https://secwatch.observer/filing/0001288847-25-000063.json","markdown":"https://secwatch.observer/filing/0001288847-25-000063.md","text":"https://secwatch.observer/filing/0001288847-25-000063.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1288847/000128884725000063/0001288847-25-000063-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1288847/000128884725000063/fivn-20250319.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-24T06:22:07.416253+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":"0c07a5b3bc","claim":"Jack Acosta departed as Director at Five9, Inc..","evidence_excerpt":"The board of directors (the “Board”) of the Company has determined that Mr. Jack Acosta, who is currently a Class II director, will not be nominated to stand for re-election as a Class II director at the Annual Meeting.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1288847/000128884725000063/0001288847-25-000063-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"not nominated for re-election"},{"label":"Role","value":"Director"}]},{"claim_id":"3e96b13b9b","claim":"Jonathan Mariner was appointed as Director, Class II at Five9, Inc..","evidence_excerpt":"The Board accepted Mr. Mariner’s resignation, reduced Class III to three members, increased Class II to four members and immediately reappointed Mr. Mariner as a Class II director with a term set to expire at the Annual Meeting.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1288847/000128884725000063/0001288847-25-000063-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned from Class III and reappointed as Class II director"},{"label":"Role","value":"Director, Class II"}]}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}