---
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"
generated_at: "2026-05-31T16:13:56.463174+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Interactive Brokers files prospectus supplement to sell 333,000 shares off shelf

## Summary
- 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.

## SEC filing metadata
- 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
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 8.01
- 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

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001381197-24-000116
- JSON: https://secwatch.observer/filing/0001381197-24-000116.json
- Plain text: https://secwatch.observer/filing/0001381197-24-000116.txt

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