| ABS Brokerage Services |
| Ameritrade,
Inc. |
| Assent LLC |
| Automated
Trading Desk |
| Automated Trdg Desk
Brok |
| Banc of America Securities |
| Barclays Capital Inc. |
| Bear,
Stearns and Co Inc. |
| Bernard L. Madoff |
| BNY Brokerage LLC. |
| B-Trade
Services LLC |
| Calyon Securities (USA)
Inc. |
| Cantor, Fitzgerald & Co. |
| CIBC World Markets Corp. |
| Citadel
Derivatives Group LLC |
| Citadel Trading
Group LLC |
| Citigroup Global Markets
Inc. |
| Credit Suisse Securities USA |
| D. A. Davidson & Co., Inc. |
| Deutsche Banc Alex Brown |
| E*Trade
Capital Markets LLC |
| Edgetrade Inc. |
| Fox River Execution Tech |
| Fox
River Execution Tehnology |
| Genesis
Securities, LLC |
| Goldman, Sachs &
Co. |
| Instinet, LLC |
| Interactive Brokers LLC |
| Investment Technology Group |
| J.P. Morgan Securities Inc. |
| Jane Street Markets |
| Jefferies
& Company, Inc. |
| Jefferies Execution
Services |
| JonesTrading |
| Knight Equity Markets, L.P. |
| Lehman
Brothers Inc. |
| Lek, Schoenau &
Co, Inc |
| Lightspeed Professional |
| Lime
Brokerage LLC |
| Liquidnet, Inc. |
| Maple
Partners USA, Inc. |
| Maxim Group LLC |
| Merrill
Lynch Pro. Clearing |
| Merrill Lynch Professional
Cl |
| Merrill Lynch, Pierce, Fenner |
| Millenco |
| Morgan
Stanley & Co., Inc. |
| Morgan, Keegan
& Company |
| Natexis Bleichroeder
Inc. |
| National Financial Services |
| Neuberger
& Berman |
| Nomura Securities Int'l
Inc. |
| Nova Fund L.P. |
| NYFIX
Millennium, L.L.C. |
| Octeg, LLC |
| Pipeline
Trading Systems LLC |
| RBC Capital Markets
Corp |
| Sandford C. Bernstein & Co. |
| Schonfeld
Securities Inc. |
| SG Americas Securities
LLC |
| Shoreline Trading Group |
| State
Street Brokerage Svcs. |
| Susquehanna
Capital Group |
| TD Ameritrade, Inc. |
| TD
Professional Execution |
| Terra Nova Trading,
LLC |
| Thinkorswim, Inc. |
| Torc
Investments and Research |
| Tradestation
Securities Inc. |
| UBS Securities, LLC |
| UNX,
Inc. |
| Wedbush
Morgan Securities Inc |
| Weeden and
Co. Inc. |
| Wolverine Execution Services |
| Wood
Gundy Corp. |
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