Instinet Group Announces Sale of Certain Assets and Release of Obligations with Zone Trading Partners.

Business Editors

NEW YORK--(BUSINESS WIRE)--June 9, 2004

Instinet Group Incorporated (NASDAQ: INGP) today announced that it sold to Zone Trading Partners the Gr8Trade and Infocenter technology, and agreed to the mutual release by Instinet Group, Zone and affiliated parties of obligations resulting from Instinet's acquisition of ProTrader in October 2001. As a result of this transaction, Instinet realized proceeds of $7.75 million. Instinet's Gr8Trade technology team will move to Zone after the Gr8Trade transition is completed in the fall of this year. Instinet had acquired ProTrader to provide advanced trading technologies and electronic brokerage services primarily to professional non-institutional traders, active fund managers, direct access brokers and hedge funds who used the Instinet trading platform.

About Instinet Group

Instinet Group, through affiliates, is the largest global electronic agency securities broker and has been providing investors with electronic trading solutions and execution services for more than 30 years. We operate our two major businesses through Instinet, LLC, the Institutional Broker, and Inet ATS, Inc., the electronic marketplace.

-- Instinet, the Institutional Broker, gives its customers the

opportunity to use its sales-trading expertise and advanced

technology tools to interact with global securities markets,

improve trading and investment performance and lower overall

trading costs. Through Instinet's electronic platforms,

customers can access other U.S. trading venues, including

NASDAQ and the NYSE, and almost 30 securities markets

throughout the world. Instinet acts solely as an agent for its

customers, including institutional investors, such as mutual

funds, pension funds, insurance companies and hedge funds.

Lynch, Jones & Ryan, Instinet Group's commission recapture

subsidiary, and Instinet Clearing Services, Inc., Instinet

Group's clearing broker, are also a part of Instinet.

-- INET, the electronic marketplace, represents the consolidation

of the order flow of the former Instinet ECN and former Island

ECN, providing its U.S. broker-dealer customers one of the

largest liquidity pools in NASDAQ-listed securities.

This press release is for information purposes only and is not intended as an offer or solicitation with respect to the purchase or sale of any security. While Instinet believes the information contained herein is reliable, we do not guarantee its accuracy, and it may be incomplete or condensed. Instinet undertakes no obligation to update publicly any of the information contained herein, in light of new information or future events.

(C)2004 Instinet Group Incorporated and its affiliated companies. All rights reserved. INSTINET and INET are service marks in the United States. Instinet Group Incorporated is part of the Reuters family of companies.

Instinet, LLC (branded Instinet, the Institutional Broker), member NASD/SIPC; Inet ATS, Inc. (branded INET), member NASD/NSX/SIPC; Lynch, Jones & Ryan, Inc., member NASD/SIPC; and Instinet Clearing Services, Inc., member NASD/SIPC, are subsidiaries of Instinet Group Incorporated.