| A. Packard Trading |
| A.B. WATLEY DIRECT |
| ABG Analytics and Consulting |
| ABG Trading |
| AbleSys |
| absolute futures commodity brokerage |
| Absolute Return Portfolio Mgmt |
| Access Futures & Options Trading Inc. |
| AccuWeather, Inc. |
| ACM |
| Acme Trader |
| Activa Funds |
| Acuvest |
| Adam Milton |
| Adaptrade Software |
| Addaptron Software |
| ADEST |
| ADM |
| Trading on Target |
| Advanced Futures |
| Advanced Options Concepts |
| Advanced Trading Systems |
| Advantage Futures |
| Advantage Systems |
| Advantages In Options |
| AdviceTrade |
| AfterHourTrades |
| AG Edwards |
| AGF Group of Funds |
| AGN Futures |
| AIM FUTURES & OPTIONS |
| AIQ Systems |
| AIR Software |
| AiStockCharts |
| AKFOREX |
| Alaron |
| Alchemy Trading Technologies |
| AlertGuru.com |
| Alex Roslin |
| Alger Funds |
| All In The Money |
| Allegro Trading Systems |
| Allendale |
| Alliance Fund Group |
| Alliance Trader |
| Alpari (UK) Limited |
| Alpha Advisor Service |
| Alpha Analytics |
| Alpha One Trading |
| Alpha Trading Systems |
| AlphaKing.com |
| Altamira Investment Services |
| ALTAVEST Worldwide Trading |
| Alterama Inc. |
| Alternative Asset Management |
| Altreva |
| Alyuda Research |
| AmCan Financial Group |
| American Capital |
| American Century Investments |
| American Funds Group |
| American Futures and Options |
| AmericanWare |
| AmiBroker.com |
| Aminda |
| AMP Managment New Zealand |
| AnalyzerXL |
| ANCO Futures |
| Anfield Capital |
| ANFutures |
| Another Winning Trade |
| AOS, Inc. |
| ApexFutures |
| APPL INTL |
| ArcFutures |
| Argo SE |
| Ariel Mutual Funds |
| Armen Computing |
| Aronow Software |
| Artisan Funds |
| Ashkon Technology |
| Asp Media |
| Aspen Research Group |
| Aston Funds |
| Astor Asset Mgmt |
| Astro Economics |
| Astrolabe, Inc. |
| ATC Analytics |
| Athens Stock Exchange |
| ATRADE Investment Technologies |
| Attain Capital Management |
| Aurigen |
| Australian Stock Exchange |
| Autochartist |
| Avarin Systems |
| Avid Trading |
| AWP Financial Group |
