| Member | Seat Type | Firm |
| Abdelmaseeh, Michael | Regular | Wolverine Trading, LLC |
| Abel, Stanley | Associate | ABEL/NOSER Corporation |
| Accardi, John M. | Regular | Kellogg Capital Group, LLC |
| Adams, John D. | Regular | Jane Street Specialists, LLC; Jane Street Capital, LLC |
| Adcock, Paul D. | Regular | Archipelago Securities, LLC |
| Adorney, David J. | Regular | Goldman Sachs Execution & Clearing, LP |
| Albert, Nasir N. | OPM | Consolidated Trading, LLC |
| Alger, Fred | Associate | Fred Alger & Company, Incorporated |
| Alter, John E. | Regular | AGS Specialists II, LLC |
| Alvarado, Michele L. | Regular | Cohen Specialists, LLC |
| Amato, Jr., Stephen A. | Regular | RET Securities, Corp.; Jefferies Execution Services, Inc. |
| Amato, Steven | Regular | AIM Securities, Co. |
| Anastas, James S. | Regular | Taylor Execution Service, LLC |
| Andersen, John C. | Regular | Bear, Stearns & Co., Inc. |
| Anderson, George | Associate | Anderson & Strudwick, Incorporated |
| Anderson, Lindsay B. | Regular | J. Streicher & Co., LLC |
| Aponte, Jose A. | Regular | Israel A. Englander & Co., Inc. |
| Ashley, Michael L. | Regular | AGS Specialists II, LLC |
| Assante, Michael C. | Regular | Bluefin Trading, LLC; Bluefin Specialists, LLC |
| Atkins, Daniel E. | Regular | STR Specialists, LLC |
| Avila, Antonio B. | Regular | G. S. Trading Partners, LLC |
| Ayres, Michael J. | Regular | Cohen Specialists, LLC |
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