{"schema_version":"secwatch.filing_event.v1","accession":"0001109448-23-000030","form_type":"8-K","ticker":null,"cik":"0001109448","company_name":"ALLIANCEBERNSTEIN L.P.","filed_at":"2023-06-01T23:59:59+00:00","discovered_at":"2026-05-14T18:03:37.968181+00:00","generated_at":"2026-06-14T08:58:08.380164+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"AB CFO & COO Kate Burke resigns; Siemers interim CFO, Sprules COO","bullets":["Kate Burke resigned as COO and CFO effective May 31, 2023 to become president of a large private asset manager.","William R. Siemers (Controller & CAO) appointed Interim CFO, effective immediately; he held the same interim role in 2022.","Karl Sprules (Head of Global Technology & Operations) appointed COO, effective immediately; he joined AB in 1998 and was CTO."],"urls":{"canonical":"https://secwatch.observer/filing/0001109448-23-000030","json":"https://secwatch.observer/filing/0001109448-23-000030.json","markdown":"https://secwatch.observer/filing/0001109448-23-000030.md","text":"https://secwatch.observer/filing/0001109448-23-000030.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1109448/000110944823000030/0001109448-23-000030-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1109448/000110944823000030/ab-20230601.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-14T08:58:08.380164+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":"834563de21","claim":"William R. Siemers was appointed as Interim Chief Financial Officer at ALLIANCEBERNSTEIN L.P..","evidence_excerpt":"AB appointed William R. Siemers, AB's Controller and Chief Accounting Officer, as Interim Chief Financial Officer, effective immediately.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1109448/000110944823000030/0001109448-23-000030-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Interim Chief Financial Officer"}],"fact_type":"executive_change"},{"claim_id":"eaa3f39e95","claim":"Karl Sprules was appointed as Chief Operating Officer at ALLIANCEBERNSTEIN L.P..","evidence_excerpt":"In addition, AB appointed Karl Sprules, AB's Head of Global Technology & Operations, as Chief Operating Officer, effective immediately.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1109448/000110944823000030/0001109448-23-000030-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Chief Operating Officer"}],"fact_type":"executive_change"},{"claim_id":"f1dc99dbb3","claim":"Kate Burke resigned as Chief Operating Officer and Chief Financial Officer at ALLIANCEBERNSTEIN L.P..","evidence_excerpt":"On May 31, 2023, Kate Burke notified AllianceBernstein L.P. (“AB”) of her resignation from her positions as Chief Operating Officer and Chief Financial Officer, effective May 31, 2023, to become the president of a large privately-owned asset management firm.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1109448/000110944823000030/0001109448-23-000030-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Chief Operating Officer 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"}