{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-21-023141","form_type":"8-K","ticker":"XFOR","cik":"0001501697","company_name":"X4 Pharmaceuticals, Inc","filed_at":"2021-11-12T23:59:59+00:00","discovered_at":"2026-05-14T18:04:12.767169+00:00","generated_at":"2026-06-28T09:08:01.938165+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.35,"calibrated_materiality_score":0.35,"confidence":"high","headline":"Director René Russo resigns from X4 Pharmaceuticals Board, effective Nov 11, 2021","bullets":["René Russo resigned from the Board of Directors on November 11, 2021, effective immediately.","Resignation was not due to any disagreement with the Company on operations, policies or practices.","No replacement director has been announced as of the filing date."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-21-023141","json":"https://secwatch.observer/filing/0001628280-21-023141.json","markdown":"https://secwatch.observer/filing/0001628280-21-023141.md","text":"https://secwatch.observer/filing/0001628280-21-023141.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1501697/000162828021023141/0001628280-21-023141-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1501697/000162828021023141/xfor-20211111.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-28T09:08:01.938165+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":"1c7560b117","claim":"René Russo resigned as Director at X4 Pharmaceuticals, Inc.","evidence_excerpt":"On November 11, 2021, René Russo resigned from the Board of Directors","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1501697/000162828021023141/0001628280-21-023141-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}