- 1st Discount Brokerage, Inc.   
- A.G.P./ Alliance Global Partners, LLC   
- ABN AMRO Clearing USA LLC   
- ACS Execution Services, LLC   
- Advisors Asset Management, Inc.   
- Aegis Capital Corp.   
- Akuna Securities LLC   
- Allen & Company LLC   
- Alpha Trading L.P. (Israel)  
- ALPINE SECURITIES CORPORATION   
- American Capital Partners, LLC   
- ANDREW GARRETT INC.   
- ANOS CAPITAL, LLC   
- Apex Clearing Corporation   
- Archipelago Securities L.L.C.  
- ATM Execution LLC (Cowen & Co.)  
- AXIOM CAPITAL MANAGEMENT, INC.   
- AXOS Clearing LLC   
- B. RILEY SECURITIES, INC.   
- Banyan Securities, LLC   
- Barclays Capital Inc.   
- Bay Crest Partners, LLC   
- Belvedere Trading LLC   
- BERENBERG CAPITAL MARKETS LLC   
- BERNSTEIN INSTITUTIONAL SERVICES LLC   
- BGC Financial, L.P.   
- BMO Capital Markets Corp.   
- BNP Paribas Securities Corp.   
- BNY Mellon Capital Markets LLC   
- BOFA Securities, Inc.   
- BOLT-X LLC (Sumo Holdings)  
- Bradesco Securities, Inc. (Brazil)  
- BREAN CAPITAL, LLC   
- BROWNSTONE INVESTMENT GROUP, LLC   
- BTIG, LLC   
- BUCKMAN, BUCKMAN & REID, INC.   
- BULLTICK, LLC   
- C. L. King & Associates, Inc.   
- Canaccord Genuity LLC   
- Cantor Fitzgerald & Co.   
- CAPITAL INSTITUTIONAL SERVICES, INC.   
- CAPITAL ONE SECURITIES, INC.   
- CBOE Trading, Inc.   
- Celadon Financial Group LLC   
- CEROS FINANCIAL SERVICES, INC.   
- CHARDAN CAPITAL MARKETS LLC   
- Charles Schwab & Co. Inc.   
- Churchill Capital USA, Inc.   
- CIBC World Markets Corp.   
- Citadel Securities LLC   
- Citigroup Global Markets Inc.   
- Citizens JMP Securities LLC   
- Clear Street Markets LLC   
- CLEAR STREET, LLC   
- Clearpool Execution Services, LLC   
- CLSA AMERICAS, LLC   
- CODA MARKETS, INC.   
- COLLIERS SECURITIES LLC.   
- Comhar Capital Markets, LLC   
- COMPASS POINT RESEARCH & TRADING, LLC   
- Cowen and Company, LLC   
- Craig-Hallum Capital Group LLC   
- CREAND SECURITIES   
- Credit Suisse Securities (USA) LLC D.A.   
- Daiwa Capital Markets America Inc.   
- Dash Financial Technologies LLC   
- Davenport & Company LLC   
- Davidson & Co.   
- DAWSON JAMES SECURITIES, INC   
- Deutsche Bank Securities Inc.   
- DINOSAUR FINANCIAL GROUP, L.L.C   
- Dowling & Partners Securities LLC   
- DRIVEWEALTH INSTITUTIONAL LLC   
- DRW Execution Services, LLC   
- DRW Securities, L.L.C.   
- DV Equities   
- DYNAMEX TRADING, LLC   
- EarlybirdCapital, Inc.   
- Edward Jones   
- EVERCORE GROUP L.L.C.   
- FBN Securities, Inc.   
- FELTL & COMPANY   
- FIRST BROKERS SECURITIES LLC (ICAP)  
- FIRST MANHATTAN SECURITIES LLC   
- Flow Traders U.S. LLC   
- FOG EQUITIES LLC   
- FRED ALGER & COMPANY, LLC.   
- G1 Execution Services, LLC  
- GBM International, Inc.   
- GFI Securities LLC   
- GILDER GAGNON HOWE & CO. LLC   
- GLEN EAGLE WEALTH, LLC   
- Glendale Securities, Inc.   
- Global Execution Brokers, LP  
- Global Financial Services, L.L.C.   
- GMS Group   
- Goldman Sachs & Co. LLC   
- GOLDMAN SACHS CUSTODY SOLUTIONS   
- GREEN PIER FINTECH LLC (Fidelity)  
- GRIFFIN FINANCIAL GROUP, LLC   
- Group One Trading, L.P.   
- GTS Securities, LLC   
- GUGGENHEIM SECURITIES, LLC   
- H.C. WAINWRIGHT & CO., INC.   
- HAITONG INTERNATIONAL SECURITIES (USA) INC.   
- HAP Trading, LLC   
- Height Securities, LLC   
- Hilltop Securities Inc.   
- HOVDE GROUP, LLC   
- HRT Financial LP   
- HSBC Securities (USA) Inc.   
- HULL PARTNERS LLC (Blair Hull)  
- IEX Services LLC   
- IMC-Chicago, LLC   
- IMI SECURITIES CORP   
- IMPERIAL CAPITAL, LLC   
- Industrial and Commercial Bank of China Financial Services LLC   
- ING Financial Markets LLC   
- Instinet, LLC   
- Interactive Brokers LLC   
- INTESA SANPAOLO   
- Investment Placement Group   
- J.H. DARBIE & CO., INC.   
- J.P. Morgan Securities LLC   
- J.V.B. Financial Group, LLC   
- Jane Street Capital, LLC   
- Jane Street Execution Services, LLC   
- Jane Street Options, LLC   
- Janney Montgomery Scott LLC   
- Jefferies LLC   
- Johnson Rice & Company L.L.C.   
- JonesTrading   
- Joseph Gunnar & Co. LLC   
- Jump Execution, LLC   
- Jump Trading, LLC   
- JWTT Inc.   
- Keefe, Bruyette & Woods, Inc.   
- KeyBanc Capital Markets Inc.   
- Kovack Securities Inc.   
- LADENBURG, THALMANN & CO., INC.   
- LAKE STREET CAPITAL MARKETS, LLC   
- LAMPOST CAPITAL, L.C.   
- Latour Trading LLC (Tower Research Capital)  
- LEERINK PARTNERS LLC   
- LIFESCI CAPITAL, LLC   
- Lightspeed Financial Services Group LLC   
- Lime Trading Corp.   
- LIQUIDNET, INC.   
- M. S. Howells & Co.   
- MACQUARIE CAPITAL (USA) INC.   
- Marex Capital Markets Inc.   
- Matrix Executions, LLC   
- Maxim Group LLC   
- MCAP LLC   
- MERIDIAN EQUITY PARTNERS INC.   
- Merrill Lynch, Pierce, Fenner & Smith Incorporated   
- Mesirow Financial, Inc.   
- MIRAE ASSET SECURITIES (USA) INC.   
- MIZUHO SECURITIES USA LLC   
- Monness Crespi Hardt & Co., Inc.   
- MOORS & CABOT, INC.   
- Morgan Stanley & Co. LLC   
- Morgan Stanley Smith Barney LLC   
- MUFG SECURITIES AMERICAS INC.   
- MURIEL SIEBERT & CO., LLC   
- Nasdaq Execution Services, LLC   
- NATIONAL BANK OF CANADA FINANCIAL INC.   
- National Financial Services LLC (Fidelity)  
- Needham & Company, LLC   
- NETWORK 1 FINANCIAL SECURITIES INC.   
- Neuberger Berman BD LLC   
- NEWBRIDGE SECURITIES CORPORATION   
- Newedge Securities, Inc.   
- Nomura Securities International, Inc.   
- NORTHLAND SECURITIES, INC.   
- ODEON CAPITAL GROUP LLC   
- Old Mission Capital LLC   
- Oppenheimer & Co. Inc.   
- Optiver US LLC   
- OSCAR GRUSS & SON, INCORPORATED   
- PARKLAND SECURITIES,  LLC   
- Paulson Investment Company LLC   
- Peak6 Capital Management LLC   
- PENSERRA SECURITIES, LLC   
- PERSHING ADVISOR SOLUTIONS, LLC   
- Pershing LLC   
- Pictet Overseas Inc.   
- Piper Sandler & Co.   
- PRIME EXECUTIONS, INC.   
- PUMA CAPITAL, LLC   
- Pundion LLC   
- Quantlab Brokerage, LLC   
- R. F. LAFFERTY & CO., INC.   
- Raymond James & Associates, Inc.   
- RBC Capital Markets, LLC   
- RBC CMA LLC   
- Regal Securities, Inc.   
- RENAISSANCE MACRO SECURITIES, LLC.   
- RICE FINANCIAL PRODUCTS COMPANY   
- RICE, VOELKER, LLC   
- Robert W. Baird & Co. Incorporated   
- Roberts & Ryan, Inc.   
- ROBINHOOD SECURITIES, LLC   
- ROBOTTI SECURITIES, LLC   
- Rosenblatt Securities Inc.   
- ROTH CAPITAL PARTNERS, LLC   
- ROTHSCHILD INVESTMENT LLC   
- RQD* CLEARING, LLC   
- SageTrader, LLC   
- San Blas Securities LLC   
- SANDERS MORRIS LLC   
- Santander US Capital Markets LLC   
- Scotia Capital (USA) Inc.   
- SEAPORT GLOBAL SECURITIES LLC   
- Sentinel Brokers Company, Inc.   
- SG Americas Securities, LLC   
- SIGMA FINANCIAL CORPORATION   
- Simplex Trading, LLC   
- Smith, Moore & Co.   
- SOGOTRADE, INC.   
- Speedroute LLC   
- SpiderRock EXS, LLC   
- State Street Global Markets, LLC   
- Stephens Inc.   
- Stifel, Nicolaus & Company, Incorporated   
- StoneX Financial Inc.   
- STUART FRANKEL & CO., INCORPORATED   
- Susquehanna Financial Group, Lllp   
- Susquehanna Securities, LLC   
- T.R. Winston & Company, LLC   
- TD Ameritrade Clearing, Inc.   
- TD Prime Services LLC   
- TD Securities (USA) LLC   
- TELSEY ADVISORY GROUP LLC   
- The Benchmark Company, LLC   
- The Investment Center, Inc.   
- The Vertical Trading Group, LLC   
- ThinkEquity, LLC   
- Three Brothers Trading, LLC (Alternative Execution Group)  
- Tower Principal Markets LLC (Tower Research Capital)  
- TP ICAP Global Markets Americas LLC   
- Tradebot Systems, Inc.   
- TRADELINK SECURITIES, LLC   
- Tradepro Securities,Inc.   
- Tradestation Securities, Inc.   
- TRADEZERO AMERICA, INC.   
- Tradition Securities and Derivatives LLC   
- TRC Markets LLC   
- Triad Securities Corp   
- TRIBAL CAPITAL MARKETS, LLC   
- Truist Securities, Inc.   
- Two Sigma Securities, LLC   
- UBS Financial Services, Inc.   
- UBS Securities, LLC   
- US Tiger Securities, Inc. [China]  
- VALUABLE CAPITAL SECURITIES   
- VELOCITY CAPITAL, LLC   
- VELOCITY CLEARING, LLC   
- VELOX CLEARING LLC   
- VIEWTRADE SECURITIES, INC.   
- Virtu Americas LLC   
- Vision Financial Markets LLC   
- Wall Street Access   
- Wallachbeth Capital LLC   
- Walleye Trading LLC   
- WATERMILL INSTITUTIONAL TRADING LLC   
- WEBULL FINANCIAL LLC   
- Wedbush Securities Inc.   
- Wells Fargo Clearing Services, LLC   
- Wells Fargo Securities, LLC   
- William Blair & Company, L.L.C.   
- William O'NEIL SECURITIES   
- WILLIAMS TRADING LLC   
- Wilson-Davis & Co., Inc.   
- Wolverine Execution Services, LLC   
- Wolverine Trading, LLC   
- XR Securities LLC   
- XTX Markets LLC