{"schema_version":"secwatch.filing_event.v1","accession":"0001381197-24-000116","form_type":"8-K","ticker":"IBKR","cik":"0001381197","company_name":"Interactive Brokers Group, Inc.","filed_at":"2024-07-25T23:59:59+00:00","discovered_at":"2026-05-14T18:03:12.844989+00:00","generated_at":"2026-05-31T16:13:56.463174+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.2,"calibrated_materiality_score":0.2,"confidence":"high","headline":"Interactive Brokers files prospectus supplement to sell 333,000 shares off shelf","bullets":["Filed prospectus supplement to sell 333,000 shares of common stock under existing shelf registration S-3 (No. 333-273451).","Legal opinion from Dechert LLP regarding share validity filed as Exhibit 5.4.","Shelf registration statement originally filed July 26, 2023.","Date of filing: July 25, 2024."],"urls":{"canonical":"https://secwatch.observer/filing/0001381197-24-000116","json":"https://secwatch.observer/filing/0001381197-24-000116.json","markdown":"https://secwatch.observer/filing/0001381197-24-000116.md","text":"https://secwatch.observer/filing/0001381197-24-000116.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1381197/000138119724000116/0001381197-24-000116-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1381197/000138119724000116/ibkr-20240725x8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-31T16:13:56.463174+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"}