{"schema_version":"secwatch.filing_event.v1","accession":"0001381197-21-000034","form_type":"8-K","ticker":"IBKR","cik":"0001381197","company_name":"Interactive Brokers Group, Inc.","filed_at":"2021-08-03T23:59:59+00:00","discovered_at":"2026-05-14T18:04:17.896312+00:00","generated_at":"2026-06-29T23:13:35.662846+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"Interactive Brokers CIO adopts Rule 10b5-1 plan to sell 2M shares","bullets":["Dr. Thomas Frank, EVP and CIO, adopted a plan on July 30, 2021 to sell 2,000,000 Class A common shares.","Shares were obtained through partial redemption of his interests in IBG Holdings LLC per prospectus supplement.","Sales will occur over time at market prices; Frank has no control over timing; plan valid until July 20, 2022.","Plan adopted for personal tax, asset diversification, and liquidity purposes."],"urls":{"canonical":"https://secwatch.observer/filing/0001381197-21-000034","json":"https://secwatch.observer/filing/0001381197-21-000034.json","markdown":"https://secwatch.observer/filing/0001381197-21-000034.md","text":"https://secwatch.observer/filing/0001381197-21-000034.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1381197/000138119721000034/0001381197-21-000034-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1381197/000138119721000034/ibkr-20210730x8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-29T23:13:35.662846+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"}