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Instinet Announces November 2002 Transaction Information

Date 09/12/2002

Instinet Group Incorporated (NASDAQ: INET) announced today that its U.S. equity share volume in November 2002 was 12,283 million shares.1

This compares to 14,458 million shares in October 2002 and 5,423 million shares in November 2001.

Instinet's U.S. equity share volume in November comprised 10,482 million shares of NASDAQ-listed stocks and 1,801 million shares of exchange-listed stocks.

Instinet's estimated total U.S. equity market share for November 2002 was 16.3%. Estimated share of NASDAQ-listed volume was 28.9%, and of exchange-listed volume was 4.6%.2

Instinet's average net equity transaction fee revenue per U.S. share per side was 0.18 cents for the month of November 2002. 3

                                        Market Share       Average Net
               U.S. Equity Shares    (Instinet (1) volume  U.S. Equity
              Traded by Instinet (1) as percent of total   Transaction
                                      market volume) (2)   Fee Revenue
                                                               (3)
             -------------------------------------------- ------------
                 Million shares               %
----- ------ -------------------------------------------- ------------
                                                            U.S. cents
        #    NASDAQ-                                        per equity
       Trade listed Exchange- Total NASDAQ- Exchange- Total  share per
Month  days    (4)    listed   U.S.  listed  listed   U.S.      side
----- ------ -------------------------------------------- ------------
Nov-
  02     20  10,482    1,801 12,283   28.9     4.6   16.3       0.18
Oct-
  02     23  12,205    2,253 14,458   31.0     4.6   16.3       0.18
Nov-
  01     23   4,323    1,100  5,423   11.2     3.3    7.6       0.62
----------------------------------------------------------------------

Monthly totals may not reflect weekly data, which are preliminary. The number of trading days in each period takes account of U.S. market holidays and any other U.S. market closings.

1 Represents Instinet Group Incorporated volume from all sources, including the Island ECN beginning the week ended 9/27/02, ProTrader Securities L.P. beginning the week ended 10/5/01, and Instinet Corporation.

2 Market share information may be subject to change when NASDAQ posts its final volume statistics.

3 Net equity transaction fee revenue is presented net of "Soft Dollar and Commission Recapture" and "Broker-Dealer Rebate" expenses. The required accounting for our soft dollar and commission recapture businesses requires us to record transaction fee revenues on a gross basis, inclusive of revenue which is associated with our soft dollar and commission recapture expenses and broker dealer rebates.

4 For a description of how we calculate our NASDAQ volumes, see "Management's Discussion and Analysis of Financial Condition and Results of Operations-Key Statistical Information-NASDAQ Volume Calculations" in our Annual Report on Form 10-K for the fiscal year ended December 31, 2001.

Instinet has experienced significant seasonality in its business, and period-to-period comparisons of operating results are not necessarily meaningful, nor are the results for any period necessarily indicative of results for any future period.