---
schema_version: "secwatch.filing_event.v1"
accession: "0001381197-26-000135"
form_type: "8-K"
ticker: "IBKR"
cik: "0001381197"
company_name: "Interactive Brokers Group, Inc."
filed_at: "2026-07-31T17:14:26+00:00"
generated_at: "2026-07-31T17:15:07.150896+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "medium"
source: SEC EDGAR
---

# Interactive Brokers registers 920,000 shares for potential sale via shelf

## Summary
- Filed prospectus supplement to register up to 920,000 shares of common stock under existing shelf registration.
- Shares registered under Rule 424(b)(5); legal opinion from Dechert LLP included as exhibit.
- No details on whether shares are for company or selling shareholders; offering terms not disclosed.

## SEC filing metadata
- accession: 0001381197-26-000135
- form_type: 8-K
- ticker: IBKR
- cik: 0001381197
- company_name: Interactive Brokers Group, Inc.
- filed_at: 2026-07-31T17:14:26+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: medium
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1381197/000138119726000135/0001381197-26-000135-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1381197/000138119726000135/ibkr-20260731.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001381197-26-000135
- JSON: https://secwatch.observer/filing/0001381197-26-000135.json
- Plain text: https://secwatch.observer/filing/0001381197-26-000135.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.