Quick answer
Interactive Brokers Group, Inc. (IBKR) disclosed a 4-for-1 stock split in SEC filings (first reported in a 10-Q filed 2025-08-06, period ending 2025-04-15).
Data as of 2025-08-06. Source: SEC EDGAR XBRL filings
| Period end | Split ratio | Form | Filed |
|---|---|---|---|
| 2025-04-15 | 4-for-1 | 10-Q | 2025-08-06 |
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Last updated 2026-10-16. Data only, not financial or tax advice.