Mondo Visione Worldwide Financial Markets Intelligence

FTSE Mondo Visione Exchanges Index:

Archipelago Holdings Releases January 2006 Transaction Volume Data

Date 10/02/2006

Archipelago Holdings, Inc. (PCX: AX) today announced its January 2006 market transaction volume data for the Archipelago Exchange (ArcaEx(R)) and the Pacific Exchange (PCX). Specifically, in NYSE-listed equity securities, ArcaEx's total trading market share was 5.0% in January 2006, up from 2.4% in January 2005 and up from 4.7% in December 2005.

In AMEX-listed equity securities, ArcaEx's total trading market share was 31.0% in January 2006, up from 25.5% in January 2005 and up from 29.7% in December 2005. ArcaEx's ETF total monthly share volume showed continued year- over-year growth with 2,662.3 (millions of shares) having traded in January 2006 compared to 1,632.0 (millions of shares) traded in January 2005 and up from 2,003.5 (millions of shares) in December 2005.

In Nasdaq-listed equity securities, ArcaEx's total trading market share was 22.5% in January 2006 down from 24.0% in January 2005 and up from 21.6% in December 2005.

In equity option contracts, the PCX's total trading market share was 12.4% in January 2006 up slightly from 12.3% in January 2005 and down from 14.6% in December 2005.

During the month there were 27 new equity options listed for trading onPCX.

 ArcaEx Transaction Volume Data

                                   January         December       January
                                    2006            2005           2005

    Total monthly volume of        43,671.4        36,081.6       43,788.7
     Nasdaq-listed equity
     securities (millions of
     shares)

    ArcaEx monthly volume of        9,838.4         7,810.6       10,520.0
     Nasdaq-listed equity
     securities (millions of
     shares) (1)

    ArcaEx share of total monthly    22.5 %          21.6 %         24.0 %
     volume of Nasdaq-listed
     equity securities (%)(2)

    Total monthly volume of        51,920.5        44,392.0       40,521.1
     NYSE-listed equity securities
     (millions of shares)

    ArcaEx monthly volume of        2,608.5         2,067.5          985.7
     NYSE-listed equity securities
     (millions of shares)(1)

    ArcaEx share of total monthly     5.0 %           4.7 %          2.4 %
     volume of NYSE-listed equity
     securities (%)(2)

    Total monthly volume of         6,864.7         5,694.4        4,944.8
     AMEX-listed equity
     securities (millions of
     shares)

    ArcaEx monthly volume of        2,131.3         1,693.1        1,260.9
     AMEX-listed equity
     securities (millions of
     shares) (1)

    ArcaEx share of total monthly    31.0 %          29.7 %         25.5 %
     volume of AMEX-listed equity
     securities (%)(2)

    ArcaEx ETF total monthly        2,662.3         2,003.5        1,632.0
     share volume (millions of
     shares)(1)

    ArcaEx monthly customer order    89.3 %          88.5 %         88.8 %
     volume matched internally
     (%)(3)

    ArcaEx monthly customer order     10.7%           11.5%          11.2%
     volume routed out (%)(3)

    Number of trading days in            20              21             20
     period


                       ArcaEx Most Active January 2006

           Symbol                             Share Volume      Market Share

    Nasdaq-100 Index(R) (QQQQ)                 570,959,389          29.0 %
    SPDR(R) (SPY)                              417,582,594          33.9 %
    Intel(R) (INTC)                            371,669,881          20.0 %
    Sun Microsystems (SUNW)                    291,584,160          21.8 %
    iShares(R) Russell 2000 Index (IWM)        280,631,033          46.2 %
    Microsoft(R) (MSFT)                        257,472,977          18.5 %
    Cisco(R) Systems (CSCO)                    235,310,830          17.4 %
    Apple Computer Inc (AAPL)                  224,140,501          28.7 %
    iShares(R) MSCI Japan Index (EWJ)          216,109,099          31.6 %
    ML Semiconductor HLDR (SMH)                208,961,300          49.0 %


                  PCX Equity Option Transaction Volume Data

                                      January       December      January
                                       2006          2005          2005

    Total consolidated monthly         164.8         126.0         108.3
     equity option contract volume
     (millions of contracts)
    PCX monthly equity option           20.4          18.4          13.3
     contract volume (millions of
     contracts) (4)
    PCX share of total monthly          12.4%         14.6%         12.3%
     equity option contract volume
     (%) (4)


                 New Equity Options Listed for Trading on PCX

    Company (Symbol))                     Lead Market Maker (LMM)

    Advanced Energy Industries (AEIS)     Citadel Derivatives Group, LLC
    Bema Gold Corp. (BGO)                 Cutler Group, LP
    BCE, Inc. (BCE)                       Citadel Derivatives Group, LLC
    Covance, Inc. (CVD)                   Group One Trading, LP
    DryShips, Inc. (DRYS)                 Group One Trading, LP
    Grupo Televisa S.A. (TV)              Group One Trading, LP
    I2 Technologies, Inc. (ITWO)          Group One Trading, LP
    Immunomedics, Inc. (IMMU)             Wolverine Trading, LLC
    IRIS International, Inc. (IRIS)       Group One Trading, LP
    iShares Dow Jones Select              Group One Trading, LP
     Dividend Index Fund (DVY)
    iShares Dow Jones U.S. Real           PEAK6 Capital Management, LLC
     Estate Index Fund (IYR)
    Kopin Corp. (KOPN)                    Group One Trading, LP
    Martin Marietta (MLM)                 Timber Hill, LLC
    Microvision, Inc. (MVIS)              Group One Trading, LP
    Multi-Fineline Electronics,           Wolverine Trading, LLC
     Inc. (MFLX)
    Nastech Pharmaceuticals Co.,          Group One Trading, LP
     Inc. (NSTK)
    NovaGold Resources, Inc. (NG)         Group One Trading, LP
    Occulogix, Inc. (RHEO)                Wolverine Trading, LLC
    Pain Therapeutics, Inc. (PTIE)        Wolverine Trading, LLC
    Palatin Technologies, Inc. (PTN)      Cutler Group LP
    Raser Technologies, Inc. (RZ)         PEAK6 Capital Management, LLC
    Regeneron Pharmaceuticals,            Wolverine Trading, LLC
     Inc. (REGN)
    Rentech, Inc. (RTK)                   Group One Trading, LP
    SIFY Ltd. (SIFY)                      Group One Trading, LP
    Spectrum Pharmaceuticals,             Wolverine Trading, LLC
     Inc. (SPPI)
    Stamps.com, Inc. (STMP)               Citadel Derivatives Group, LLC
    SulphCo, Inc. (SUF)                   Cutler Group, LP

Additional information on ArcaEx daily, weekly and monthly trading transaction volumes is publicly available in real time through the ArcaVision website accessible via http://www.archipelago.com. Additional data and enhanced functionality can be obtained through a free subscription to ArcaVision. Investors and ArcaEx clients can subscribe to ArcaVision at http://www.arcavision.com.

(1) For purposes of calculating monthly transaction volume on ArcaEx, we include all shares that are "handled" on ArcaEx for the month. Handled shares include both shares that are bought and sold during the month within our internal liquidity pool and shares that are routed to external market centers for execution.

(2) ArcaEx monthly market share is calculated based on the number of shares handled on the ArcaEx system during the month as a percentage of total monthly volume. Total monthly volume is based on the number of shares of equity securities traded during the month on Nasdaq, AMEX or the NYSE, including, if applicable, exchange-traded funds, as reported in the consolidated tape. The "consolidated tape" provides last sale price and volume of equity securities transactions to the public.

(3) In computing the percentage of monthly client order volume matched internally and the monthly percentage of customer order volume routed out, we calculate the percentage based on the volume of individual customer orders, not the volume of matched trades (i.e., only counting one side of a matched transaction). For example, we calculate two customer orders matched internally on our system as two customer orders matched internally, and we include the volume of both the buy order and the sell order in computing our percentages of monthly customer order volume matched internally and routed out. We calculate one customer order routed to an external market center (which will be matched with an order at that other market center) as one outbound trade or one customer order. We calculate one customer order routed to us from an external market center and matched with an order on our system as one inbound trade or one customer order.

(4) Archipelago Holdings completed its acquisition of PCX Holdings, Inc., the parent company of the PCX, on September 26, 2005. Option volume is reported by the Options Clearing Corporation (OCC).

About Archipelago Holdings
Archipelago Holdings (PCX: AX) operates the Archipelago Exchange(R) (ArcaEx(R)) the first totally open all-electronic stock exchange in the United States. ArcaEx trades all Nasdaq-listed equity securities and exchange listed equity securities, including those listed on the New York Stock Exchange(R), American Stock Exchange(R), and ArcaEx(R). In addition to offering core execution services, ArcaEx provides corporate clients with listing services and innovative data products. In September 2005, Archipelago acquired PCX Holdings, Inc., parent company of the Pacific Exchange and PCX Equities, Inc. allowing Archipelago to bring together the all-electronic trading of equity securities and options products thereby expanding and diversifying Archipelago's business lines. For more information please visit http://www.archipelago.com.

ArcaEx's, past transaction performance is not necessarily indicative of its future results. Periodically, ArcaEX's transaction performance will experience fluctuations due to unforeseen factors effecting trading activity, including seasonality, general economic, political and market conditions, unforeseen market closures or other disruptions in trading. A description of the factors that may influence ArcaEx's volume of securities transactions are identified in the Company's filings with the Securities Exchange Commission, including its Report on Form 10-K for the fiscal year ending December 31, 2004 which is available on the Company's website at http://www.archipelago.com.

Certain statements in this press release may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are based on Archipelago's current expectations and involve risks and uncertainties that could cause Archipelago's actual results to differ materially from those set forth in the statements. There can be no assurance that such expectations will prove to be correct. Factors that could cause Archipelago's results to differ materially from current expectations include: general economic and business conditions, industry trends, competitive conditions, regulatory developments as well as other risks or factors identified in the Company's filings with the Securities Exchange Commission, including its Report on Form 10-K for the fiscal year ending December 31, 2004 which is available on the Company's website at http://www.archipelago.com. You should not place undue reliance on forward- looking statements, which speak only as of the date of this press release. Except for any obligation to disclose material information under the Federal securities laws, Archipelago undertakes no obligation to release publicly any revisions to any forward-looking statements to reflect events or circumstances after the date of this press release.