(203) 618-5800

David M. Battan
Vice President and General Counsel
Interactive Brokers LLC

March 26, 2004

Via Electronic Mail and Federal Express

Jonathan G. Katz, Secretary
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549

Re: File No. S7-10-04; Request of Interactive Brokers Group to Testify at April 21, 2004 Public Hearings Regarding Proposed Regulation NMS

Dear Mr. Katz:

The Interactive Brokers Group hereby requests the opportunity to present testimony at the Commission's upcoming public hearings on April 21, 2004 in New York regarding proposed Regulation NMS. Interactive Brokers Group would present testimony through its General Counsel, David M. Battan, or through its Chairman, Thomas Peterffy, depending on scheduling issues.

Interactive Brokers Group is among the top 25 largest securities firms in the United States. We are keenly interested in the issues presented by proposed Regulation NMS both in our capacity as brokers for customer orders and as major users of the nation's stock markets through our proprietary trading and market making (our subsidiary Interactive Brokers LLC is a direct-access online brokerage firm that provides low-cost, high-speed access to global markets to the firm's sophisticated customers, and our subsidiary Timber Hill LLC is a significant market making and proprietary trading firm operating on virtually all U.S. securities markets).

Thank you for your consideration of our request and please feel free to contact me at (202) 530-3205 if you require any further information.

Respectfully submitted,

David M. Battan

cc: Annette L. Nazareth, Esq.
Robert L.D. Colby, Esq.
Sapna C. Patel, Esq.