---
schema_version: "secwatch.filing_event.v1"
accession: "0001381197-25-000086"
form_type: "8-K"
ticker: "IBKR"
cik: "0001381197"
company_name: "Interactive Brokers Group, Inc."
filed_at: "2025-07-30T23:59:59+00:00"
generated_at: "2026-05-17T22:56:28.352896+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "medium"
source: SEC EDGAR
---

# Interactive Brokers takes down 3.8M common shares from shelf registration

## Summary
- 3,836,000 shares of common stock taken down under July 2023 shelf registration statement (333-273451).
- Prospectus supplement filed July 30, 2025, under Rule 424(b)(5).
- Dechert LLP legal opinion on share validity filed as Exhibit 5.5.
- Use of proceeds not disclosed in the 8-K.

## SEC filing metadata
- accession: 0001381197-25-000086
- form_type: 8-K
- ticker: IBKR
- cik: 0001381197
- company_name: Interactive Brokers Group, Inc.
- filed_at: 2025-07-30T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: medium
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1381197/000138119725000086/0001381197-25-000086-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1381197/000138119725000086/ibkr-20250730x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001381197-25-000086
- JSON: https://secwatch.observer/filing/0001381197-25-000086.json
- Plain text: https://secwatch.observer/filing/0001381197-25-000086.txt

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