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Why a Market Maker?

The NASD ( National Association of Securities Dealers ) member firms that use their own capital, research, retail and/or systems resources to represent a stock and compete with each other to buy and sell the stocks or issues they represent. There are more than 500 member firms that act as Nasdaq Market Makers. One of the major differences between The Nasdaq Stock Market and other major markets in the U.S. is Nasdaq's structure of competing Market Makers. Each Market Maker competes for customer order flow by displaying buy and sell quotations for a guaranteed number of shares. Once an order is received, the Market Maker will immediately purchase for or sell from its own inventory until it is executed, normally in a matter of seconds.

Market
Participant ID

MP Type

Name

Address

Telephone

OAHU  ,M  ,FRY & CO., INC.  ,  ,
OAKF  ,M  ,OAKES, FITZWILLIAMS & CO. L.P.  ,  ,
OBSA  ,M  ,SERFIN SECURITIES,INC.  ,NEW YORK  NY  ,212-750-4232
OCAA  ,M  ,O'CONNOR & ASSOCIATES  ,  ,
OCAP  ,M  ,OCEAN SECURITIES CORPORATION  ,  ,
OCMI  ,M  ,OMNI CAPITAL MARKETS, INCORPORATED   ,  ,
OCON  ,M  ,O'CONNOR SECURITIES INCORPORATED  ,  ,
OCTI  ,M  ,O'CONO/TRADE,INC.  ,BOSTON, MA  ,617-227-3650
ODYS  ,Q  ,ODYSSEY PARTNERS   ,  ,
OFCC  ,N  ,OBERLIN FINANCIAL CORPORATION  ,  ,
OFFR  ,M  ,MARQUETTE FINANCIAL GROUP, INC.  ,NASDAQ/OTCBB TRADING  ,800-678-8999
OFGF  ,M  ,OFG FINANCIAL SERVICES, INC.  ,  ,
OFRD  ,M  ,THE OAKFORD CORPORATION  ,  ,
OFUT  ,M  ,OFFUTT SECURITIES, INC.  ,NASDAQ TRADING  ,410-584-9600
OGRU  ,M  ,OSCAR GRUSS & SON, INCORPORATED  ,NEW YORK  NY  ,212-943-6400
OGRU  ,M  ,OSCAR GRUSS & SON, INCORPORATED  ,NASDAQ TRADING  ,212-943-6400
OGRU  ,M  ,OSCAR GRUSS & SON, INCORPORATED  ,ARBITRAGE  ,212-943-7616
OGRU  ,M  ,OSCAR GRUSS & SON, INCORPORATED  ,WARRANTS,CONVERTABLE  ,212-943-7610
OGRU  ,M  ,OSCAR GRUSS & SON, INCORPORATED  ,FIXED-INCOMES  ,                      N/A
OGRU  ,M  ,OSCAR GRUSS & SON, INCORPORATED  ,BULLETIN BOARDS  ,212-514-2403
OGRU  ,M  ,OSCAR GRUSS & SON, INCORPORATED  ,  ,800-332-2282
OHIO  ,M  ,FIFTH THIRD SECURITIES, INC.  ,CINCINATI OH  ,                      N/A
OHIO  ,M  ,FIFTH THIRD SECURITIES, INC.  ,NASDAQ/OTCBB TRADING  ,513-744-6430
OHIO  ,M  ,FIFTH THIRD SECURITIES, INC.  ,NASDAQ/OTCBB TRADING  ,800-848-0927
OHIO  ,M  ,FIFTH THIRD SECURITIES, INC.  ,CORPORATE BONDS  ,513-744-7186
OIEN  ,P  ,OIEN SECURITIES, INC.  ,  ,
OING  ,M  ,OFTRING & COMPANY, INC.  ,NASDAQ TRADING  ,508-791-7111
OKOK  ,M  ,STRATTON OAKMONT INC.  ,  ,
OKRI  ,M  ,OAK RIDGE INVESTMENTS, INC.  ,NASDAQ TRADING  ,312-857-1040
OLDE  ,M  ,H&R BLOCK FINANCIAL ADVISORS, INC.  ,DETROIT  MI  ,313-964-0616
OLDE  ,M  ,H&R BLOCK FINANCIAL ADVISORS, INC.  ,NASDAQ TRADING  ,800-426-9966
OLDE  ,M  ,H&R BLOCK FINANCIAL ADVISORS, INC.  ,PREFERRED  ,800-684-1900
OLDE  ,M  ,H&R BLOCK FINANCIAL ADVISORS, INC.  ,INSTITUTIONAL  ,800-535-6533
OLDE  ,M  ,H&R BLOCK FINANCIAL ADVISORS, INC.  ,CONVERTIBLES  ,313-964-2091
OLDE  ,M  ,H&R BLOCK FINANCIAL ADVISORS, INC.  ,FIXED INCOME  ,313-964-2091
OLDE  ,M  ,H&R BLOCK FINANCIAL ADVISORS, INC.  ,LISTED TRADING  ,800-684-1900
OLIE  ,M  ,OLSEN PAYNE & COMPANY  ,SALT LAKE CITY, UT  ,801-355-7543
OLIE  ,M  ,OLSEN PAYNE & COMPANY  ,SALT LAKE CITY, UT  ,800-453-5321
OLIE  ,M  ,OLSEN PAYNE & COMPANY  ,SEATTLE, WA  ,800-654-9929
OLIE  ,M  ,OLSEN PAYNE & COMPANY  ,SEATTLE, WA  ,509-623-1600
OLMM  ,M  ,OLMSTED & MULHALL, INC.  ,  ,
OLYM  ,M  ,NT SECURITIES LLC  ,MONROE, LA  ,318-388-2349
ONEL  ,M  ,WILLIAM O'NEIL & COMPANY, INCORPORATED  ,LOS ANGELES, CA  ,310-574-5613
ONLI  ,M  ,HOLD BROTHERS ON-LINE INVESTMENT SERVICES INC.  ,JERSEY CITY- TRADING  ,201-499-8700
ONLI  ,M  ,HOLD BROTHERS ON-LINE INVESTMENT SERVICES INC.  ,TRADES  ,201-499-8712
ONLN  ,N  ,ONLINE STOCK MARKET, INC.  ,  ,
ONST  ,N  ,ON-SITE TRADING INC. (THE RETAIL)  ,  ,516-482-9292
ONYX  ,M  ,ONYX TRADING CORPORATION  ,NASDAQ TRADING  ,425-646-ONYX
ONYX  ,M  ,ONYX TRADING CORPORATION  ,BELLEVUE, WA  ,425-943-7689
ONYX  ,M  ,ONYX TRADING CORPORATION  ,  ,425-646-6699
ONYX  ,M  ,ONYX TRADING CORPORATION  ,TEMPORARY NUMBER  ,425-943-7689
ONYX  ,M  ,ONYX TRADING CORPORATION  ,  ,608-734-9041
OPEN  ,Q  ,OPPENHEIMER MANAGEMENT CORPORATION   ,  ,
OPMA  ,N  ,OPTIMA SECURITIES, INC.  ,  ,
OPCO, M , OPPENHEIMER & CO. INC.NASDAQ/OTCBB TRADING 212-422-7813
ORCL  ,M  ,ORACLE INVESTMENTS, INC.  ,  ,
OREO  ,P  ,ORION TRADING, LLC  ,AUBURN, CA  ,512-453-8531
ORIN  ,M  ,ORION SECURITIES, INC.  ,  ,
ORME  ,M  ,ORMES CAPITAL MARKETS, INC.  ,NASDAQ TRADING  ,212-361-1300
ORRI  ,M  ,ORRINGTON INVESTMENTS LIMITED PARTNERSHIP  ,NASDAQ TRADING  ,708-491-1166
OSBS  ,M  ,OSBORNE, STERN & COMPANY, INC.   ,  ,
OSHN  ,M  ,THE AGEAN GROUP, INC  ,  ,
OSTI  ,M  ,ON-SITE TRADING, INC.  ,  ,
OTAA  ,M  ,OTA LIMITED PARTNERSHIP  ,PURCHASE  NY  ,914-694-5851
OTAA  ,M  ,OTA LIMITED PARTNERSHIP  ,NASDAQ TRADING  ,914-694-5851
OTSB  ,M  ,OAK TREE SECURITIES, INC.  ,  ,
OTTO  ,M  ,HAMILTON PARTNERS L.P.  ,NASDAQ TRADING  ,800-435-0801
OVER  ,M  ,J. A. OVERTON & CO., INC.  ,  ,
OXDB  ,M  ,SAVOY DISCOUNT BROKERAGE  ,SEATTLE, WA  ,(206)623-7376

 

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