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Interactive Brokers draws down nearly 2.5 million shares in same-day shelf move

7/31/2026

Shelf registrations exist to be used. Interactive Brokers Group, Inc.

(IBKR) activated one quickly: on July 31, 2026, the company filed a Prospectus Supplement under Rule 424(b)(5), pulling 2,499,567 shares of common stock from Registration Statement No.

333-297857, a Form S-3 shelf the company also filed with the SEC that same day. The 8-K disclosing the transaction attaches a legal opinion from Dechert LLP on the validity of those shares.

What the filing contains The current report, signed by Paul J.