{"filing":{"accession_number":"0001381197-26-000135","cik":"0001381197","ticker":"IBKR","company_name":"Interactive Brokers Group, Inc.","form":"8-K","filing_date":"2026-07-31","report_date":"2026-07-31","primary_document":"ibkr-20260731.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1381197/000138119726000135/ibkr-20260731.htm"},"events":[{"id":22843,"run_id":20677,"accession_number":"0001381197-26-000135","anchor_item_number":"8.01","event_type":"dilutive_issuance","event_domain":"financial","is_material":true,"confidence":0.85,"summary":"Interactive Brokers filed a Prospectus Supplement under Rule 424(b)(5) to register up to 920,000 shares of common stock from its shelf Registration Statement on Form S-3. This is a registered offering of equity securities that will dilute existing shareholders. The filing of a prospectus supplement with a specific share count and legal opinion supporting validity indicates a material equity issuance event.","company_name":"Interactive Brokers Group, Inc.","ticker":"IBKR","filing_date":"2026-07-31","form":"8-K","submitted_at":null,"items":[{"id":22916,"accession_number":"0001381197-26-000135","item_number":"8.01","item_title":"Other Events.","event_type":"dilutive_issuance","event_domain":"financial","is_material":true,"confidence":0.85,"reasoning":"Interactive Brokers filed a Prospectus Supplement under Rule 424(b)(5) to register up to 920,000 shares of common stock from its shelf Registration Statement on Form S-3. This is a registered offering of equity securities that will dilute existing shareholders. The filing of a prospectus supplement with a specific share count and legal opinion supporting validity indicates a material equity issuance event.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-02T02:33:31.428246+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":22916,"accession_number":"0001381197-26-000135","item_number":"8.01","item_title":"Other Events.","event_type":"dilutive_issuance","event_domain":"financial","is_material":true,"confidence":0.85,"reasoning":"Interactive Brokers filed a Prospectus Supplement under Rule 424(b)(5) to register up to 920,000 shares of common stock from its shelf Registration Statement on Form S-3. This is a registered offering of equity securities that will dilute existing shareholders. The filing of a prospectus supplement with a specific share count and legal opinion supporting validity indicates a material equity issuance event.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-02T02:33:31.428246+00:00","company_name":"Interactive Brokers Group, Inc.","ticker":"IBKR","filing_date":"2026-07-31"}]}