Gold Sponsors

• Bank of America Merrill Lynch

• Barclays Capital

• Chicago Board Options Exchange | CBOE Stock Exchange

• Penson Worldwide, Inc.

Vendor Sponsors

• Bloomberg SSEOMS

• Morgan Stanley

• Quod Financial

• SAVVIS

• SunGard

Silver Sponsors

• BATS Exchange

• Citadel

• E*TRADE Capital Markets

• Hudson Securities, Inc.

• NASDAQ OMX

Bronze Sponsors

• BIDS Trading, L.P.

• Canaccord Adams Inc.

• Cantor Fitzgerald

• GETCO Execution Services, LLC

• Jefferies & Company, Inc.

• Pipeline Trading Systems

• Piper Jaffray

• StockCross Financial Services, Inc.

• The Depository Trust & Clearing Corporation

• Weeden & Co.

Media Sponsor