Market Makers, O List of Market Makers
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Level2StockQuotes.com - Features a market makers directory list starting with the letter O. Each Market Maker competes for customer order flow by displaying buy and sell quotations for a guaranteed number of shares.
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Market Makers: O List...
Market Makers, O List:
Info: Scroll down until you find the market maker and symbol you are looking for.
Legend: M = Market Maker, O = Order Entry Firm, C = ECN, E = Exchange, P = Service Desk Participant, N = Non-Member

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, INCORPORATED800-332-2282
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 CORPORATION425-646-6699
ONYX - M - ONYX TRADING CORPORATION - TEMPORARY NUMBER - 425-943-7689
ONYX - M - ONYX TRADING CORPORATION608-734-9041
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
Note: Simply select a letter from Market Makers main menu then scroll down to find the market maker and symbol you are looking for from the list above.
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