International Securities Exchange, Inc. - Market Structure - Members

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Members

Bins 1-10 represent ISE�s first market and Bins 50-56 represent ISE�s second market.
Primary Market Makers "PMMs"
Competitive Market Makers "CMMs"
Electronic Access Members "EAMs"


PRIMARY MARKET MAKERS "PMMs"

PMMs are market makers with significant responsibilities, including overseeing the opening, providing continuous quotations in all of their assigned options classes, and handling customer orders that are not automatically executed. A PMM must purchase or lease a PMM membership entitling the member to act as PMM in one group (or "bin") of stock options. One PMM is assigned to each of the 16 bins of options traded on the Exchange.

An important advantage of having a PMM assigned to each stock option is that members have a point of contact, who is responsible for maintaining orderly markets and is available to answer market questions and resolve trading related issues.

FIRST MARKET
Citigroup Derivatives Markets Inc.Bin 1
SLK-Hull Derivatives LLCBin 2
Citigroup Derivatives Markets Inc.Bin 3
Citadel Derivatives Group LLCBin 4
Merrill Lynch Professional Clearing CorporationBin 5
UBS Securities LLCBin 6
Timber Hill LLCBin 7
Citadel Derivatives Group LLCBin 8
SLK-Hull Derivatives LLCBin 9
Morgan Stanley & Co. IncorporatedBin 10


SECOND MARKET
Citadel Derivatives Group LLCBin 51
SLK-Hull Derivatives LLCBin 52
Morgan Stanley & Co. IncorporatedBin 53
Merrill Lynch Professional Clearing CorporationBin 54
Timber Hill LLCBin 55
UBS Securities LLCBin 56


COMPETITIVE MARKET MAKERS "CMMs"

CMMs are market makers that add depth and liquidity to the market. CMMs in the first market are required to provide continuous quotations in at least 60% of the options classes in their assigned group. Each CMM quotes independently. CMMs in the Second Market do not have a minimum quoting requirement. A CMM must purchase or lease a CMM membership to enter quotations in the first market, and each membership entitles the member to enter quotations in one group of options in the first market. Up to 16 CMMs are appointed to each of the 16 bins of options traded on the Exchange.

FIRST MARKET
Archelon LLC Bins 1, 2, 3, 4, 5, 7, 10
Bear Wagner Specialists LLC Bins 2, 6, 7, 9
Citadel Derivatives Group LLC Bins 1, 2, 3, 5, 6, 7, 9, 10
Citigroup Derivatives Markets Inc. Bins 2, 4, 5, 6, 7, 8, 9, 10
Credit Suisse Securities (USA) LLC Bins 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
CTC, L.L.C. Bin 9
Group One Trading, L.P. Bin 8
Holland Trading House LLC Bin 5
J.P. Morgan Securities Inc. Bins 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Lehman Brothers Inc. Bins 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Merrill Lynch Professional Clearing Corporation Bins 1, 2, 3, 4, 6, 7, 8, 9, 10
Morgan Stanley & Co. Incorporated Bins 1, 2, 3, 4, 5, 6, 7, 8, 9
Optiver US, LLC Bins 3, 4
Ronin Capital, LLC Bins 2, 3, 6, 8, 9, 10
SLK-Hull Derivatives LLC Bins 1, 3, 4, 5, 6, 7, 8, 10
Susquehanna Investment Group Bins 1, 3, 4, 5, 6, 7, 8, 9, 10
TD Options LLC Bins 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Timber Hill LLC Bins 1, 2, 3, 4, 5, 6, 8, 9, 10
UBS Securities LLC Bins 1, 2, 3, 4, 5, 7, 8, 9, 10
Walleye Trading, LLC Bins 1, 2, 4, 5, 6, 7, 8, 10
Wolverine Trading, LLC Bins 1, 2, 3, 4, 5, 6, 7, 8, 9, 10


SECOND MARKET
Citadel Derivatives Group LLC Bins 52, 53, 54, 55, 56
SLK-Hull Derivatives LLC Bins 51, 53, 54, 55, 56
Morgan Stanley & Co. Incorporated Bins 51, 52, 54, 55, 56
Merrill Lynch Professional Clearing Corporation Bins 51, 52, 53, 55, 56
Ronin Capital, LLC Bins 51, 52, 53, 54, 55, 56
Susquehanna Investment Group Bins 51, 52, 53, 54, 55, 56
TD Options LLC Bins 51, 52, 53, 54, 55, 56
Timber Hill LLC Bins 51, 52, 53, 54, 56
UBS Securities LLC Bins 51, 52, 53, 54, 55
Wolverine Trading, LLC Bins 51, 52, 53, 54, 55, 56


ELECTRONIC ACCESS MEMBERS "EAMs"

EAMs are broker/dealers that represent agency and proprietary orders on the Exchange. An EAM does not purchase a membership. Rather, once approved as an ISE member, an EAM pays an access fee that permits the firm to place orders in all of the options traded on the Exchange. EAMs cannot enter quotations or otherwise engage in market making activities on the Exchange.

ABS Brokerage Services, LLC
ADP Clearing & Outsourcing Services, Inc.
Ameritrade, Inc.
Andrie Trading, LLC
Automated Trading Desk Brokerage Services, LLC
Banc of America Securities LLC
Barclays Capital, Inc.
Bear Wagner Specialists LLC
Bear, Stearns & Co. Inc.
Bear, Stearns Securities Corp.
Benchmark Company, LLC [The]
Biremis Corporation
Bloomberg Tradebook LLC
Blue Capital Group LLC
BNP Paribas Securities Corp.
BrownCo, LLC
Bulltick, LLC
Calyon Financial Inc.
Calyon Securities (USA) Inc.
Cantor Fitzgerald & Co.
Capstone Trading, LLC
Casey Professional Services, LLC
Casey Securities, LLC
Cathay Financial, Inc.
Charles Schwab & Co., Inc
CIBC World Markets Corp.
Citadel Derivatives Group LLC
Citadel Trading Group LLC
Citigroup Global Markets Inc.
Clancy's on Wall, Inc.
Collins Stewart Inc.
Compass Professional Services, LLC
Cornerstone Trading, LLC
Correspondent Services Corporation
Cowen & Company, LLC
Credit Suisse Securities (USA) LLC
CTC, L.L.C.
CyberTrader, Inc.
Daiwa Securities America Inc.
DC Trading Partners LLC
Deutsche Bank Securities Inc.
Divine Capital Markets LLC
Dresdner Kleinwort Securities LLC
E*TRADE Clearing LLC
Electronic Brokerage Systems, LLC
Equate Trading Group, LLC
Equitec Proprietary Markets, LLC
EWT, LLC
Exane, Inc.
Fimat USA, LLC
First Clearing, LLC
First New York Securities L.L.C.
First Southwest Company
Fortis Clearing Americas LLC
G-Bar Limited Partnership
Genesis Securities, LLC
Geneva Trading LLC
GFI Securities LLC
Global Execution Brokers, LP
Goldman Sachs Execution & Clearing, L.P.
Goldman, Sachs & Co.
Group One Trading, L.P.
Guzman & Company
Hapoalim Securities USA, Inc.
Hardcastle Trading USA L.L.C.
Heights Partners, Inc.
Holland Trading House LLC
HSBC Securities (USA) Inc.
Husky Trading
ICAP Corporates LLC
Ingalls & Snyder, LLC
Instinet, LLC
Interactive Brokers LLC
International Correspondent Trading, Inc.
ISERoute, LLC
Israel A. Englander & Co. Inc.
J.J.B. Hilliard, W.L. Lyons, Inc.
J.P. Morgan Securities Inc.
Jefferies & Company, Inc.
Jefferies Execution Services, Inc.
Jump Trading, LLC
KBC Financial Products USA Inc.
Kellogg Partners Institutional Services
Kelmoore Investment Company, Inc.
Knight Equity Markets, L.P.
KV Execution Services LLC
LaBranche Structured Products LLC
Lavaflow, Inc.
Legent Clearing Corp.
Lehman Brothers Inc.
Lek Securities Corporation
Linkbrokers Derivatives Corporation
Liquidpoint, LLC
Louis Capital Markets, LP
MAKO Financial Markets, LLC
Man Securities Inc
Maxim Group LLC
Merrill Lynch Professional Clearing Corporation
Merrill Lynch, Pierce, Fenner & Smith Incorporated
Mesirow Financial, Inc.
MillenCo, L.P.
Miller Tabak + Co., LLC
Monadnock Capital Management, LP
Morgan Stanley & Co. Incorporated
Morgan Stanley DW Inc.
Nasdaq Execution Services, LLC
National Financial Services LLC
Neuberger Berman, LLC
Nomura Securities International, Inc.
NYFIX Transaction Services, Inc.
OCTEG, LLC
Oppenheimer & Co. Inc.
optionsXpress, Inc.
OTA LLC
Pali Capital Inc.
Parallax Fund, L.P.
PEAK6 Capital Management LLC
Penson Financial Services, Inc.
Pershing LLC
PFTC L.L.C.
Pictet Overseas Inc.
Prebon Financial Products Inc.
Prudential Equity Group, LLC
PTR, Inc.
Quiet Light Securities, LLC
R.F. Lafferty & Co., Inc.
RBC Capital Markets Corporation
RedSky Financial, LLC
Rochdale Securities LLC
Ronin Capital, LLC
ROQ Capital, LLC
Rosenblatt Securities Inc.
Samurai Trading, LLC
Sanford C. Bernstein & Co., LLC
Schonfeld Securities, LLC
SG Americas Securities, LLC
Shoreline Trading Group, LLC
Southwest Securities, Inc.
Sun Trading, LLC
Swiss American Securities Inc.
TD Options LLC
TD Professional Execution, Inc.
Terra Nova Trading, LLC
TFS Derivatives Corporation
Track Data Securities Corp.
TradeKing
TradeStation Securities, Inc.
Tradition Asiel Securities Inc.
UBS Clearing Services Corporation
UBS Financial Services, Inc.
UBS Securities LLC
Vandham Securities Corp.
VDM Trading, LLC
Wachovia Capital Markets, LLC
Wachovia Securities, LLC
Wall Street Access
Wolverine Execution Services, LLC
Wolverine Trading, LLC