IBKR 424B5: Secondary offering
Interactive Brokers Group, Inc.
Filed with the SEC on · accession 0001381197-26-000133
IBKR filed a 424B5 (prospectus (offering)) with the SEC on Jul 31, 2026. The final terms of an offering of shares or bonds. The stock moved -2.8% by the first close after the filing.
Summary of the filing
Interactive Brokers Group, Inc. filed a prospectus supplement for the issuance of 2,499,567 shares of Class A common stock to IBG Holdings LLC in exchange for membership interests in IBG LLC, with no cash proceeds to the company.
Key details
How IBKR stock reacted
Close before
$90.48
Jul 30, 2026
First close after
-2.75%
$87.99
5 trading days
-4.93%
$86.02
Since filing
-19.62%
$72.73
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Click hereFrequently asked questions
What did IBKR file with the SEC on Jul 31, 2026?
IBKR filed a 424B5 (Secondary offering). Interactive Brokers Group, Inc. filed a prospectus supplement for the issuance of 2,499,567 shares of Class A common stock to IBG Holdings LLC in exchange for membership interests in IBG LLC, with no cash proceeds to the company.
What does a secondary offering mean for IBKR stock?
New shares dilute existing holders and are often sold at a discount to the market price.
How do I read a 424B5?
The final terms of an offering of shares or bonds. Look at price, number of shares and the discount to the market price. Large offerings dilute existing shareholders.
Why are SEC filings important?
Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A 424B5 (prospectus (offering)): The final terms of an offering of shares or bonds.
How did IBKR stock react to this filing?
IBKR closed at $90.48 before the filing and $87.99 on Jul 31, 2026 (-2.75%). Five trading days later: $86.02 (-4.93%).
Other IBKR SEC filings
- 10-Q · SEC filingNov 5, 2026
- 8-K · SEC filingOct 15, 2026
- 10-Q · SEC filingAug 6, 2026
- 424B5 · Secondary offeringJul 31, 2026
- 8-K · Secondary offeringJul 31, 2026
- 8-K · Secondary offeringJul 31, 2026
- 8-K · SEC filingJul 21, 2026
- 10-Q · SEC filingMay 7, 2026
- 8-K · Board changeApr 29, 2026
- 144 · Insider sale plannedApr 28, 2026
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