{"schema_version":"secwatch.filing_event.v1","accession":"0001381197-25-000086","form_type":"8-K","ticker":"IBKR","cik":"0001381197","company_name":"Interactive Brokers Group, Inc.","filed_at":"2025-07-30T23:59:59+00:00","discovered_at":"2026-05-14T18:02:43.851901+00:00","generated_at":"2026-05-17T22:56:28.352896+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"medium","headline":"Interactive Brokers takes down 3.8M common shares from shelf registration","bullets":["3,836,000 shares of common stock taken down under July 2023 shelf registration statement (333-273451).","Prospectus supplement filed July 30, 2025, under Rule 424(b)(5).","Dechert LLP legal opinion on share validity filed as Exhibit 5.5.","Use of proceeds not disclosed in the 8-K."],"urls":{"canonical":"https://secwatch.observer/filing/0001381197-25-000086","json":"https://secwatch.observer/filing/0001381197-25-000086.json","markdown":"https://secwatch.observer/filing/0001381197-25-000086.md","text":"https://secwatch.observer/filing/0001381197-25-000086.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1381197/000138119725000086/0001381197-25-000086-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1381197/000138119725000086/ibkr-20250730x8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T22:56:28.352896+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":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}