{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-21-236517","form_type":"8-K","ticker":"BXSL","cik":"0001736035","company_name":"Blackstone Secured Lending Fund","filed_at":"2021-08-05T23:59:59+00:00","discovered_at":"2026-05-14T18:04:19.434419+00:00","generated_at":"2026-06-29T21:52:23.086405+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.35,"calibrated_materiality_score":0.35,"confidence":"high","headline":"Blackstone Secured Lending Fund appoints Katherine Rubenstein as COO effective August 4, 2021","bullets":["Katherine Rubenstein, age 43, appointed Chief Operating Officer effective August 4, 2021.","She is a Managing Director in Blackstone Credit and also serves as COO of Blackstone Private Credit Fund.","Joined Blackstone in 2015, where she created and led the GSO Advantage platform (now Blackstone Credit Advantage).","Previously originated senior secured loans at GE Capital and worked in brand management at World Kitchen."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-21-236517","json":"https://secwatch.observer/filing/0001193125-21-236517.json","markdown":"https://secwatch.observer/filing/0001193125-21-236517.md","text":"https://secwatch.observer/filing/0001193125-21-236517.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1736035/000119312521236517/0001193125-21-236517-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1736035/000119312521236517/d212475d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-29T21:52:23.086405+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":"71b35185bf","claim":"Katherine Rubenstein was appointed as Chief Operating Officer at Blackstone Secured Lending Fund.","evidence_excerpt":"appointed Katherine Rubenstein as Chief Operating Officer of the Company.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1736035/000119312521236517/0001193125-21-236517-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Chief Operating Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}