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Instinet Announces Executive Management Change

Date 10/02/2003

Instinet Group Incorporated (Nasdaq: INET) announced today that Mark Nienstedt has resigned from his position as President of the Corporation, effective immediately.

Mr. Nienstedt will continue to serve as an officer within the Corporation, be a member of the Board of the Corporation and provide advisory services to the CEO and senior management as appropriate. The position of President will remain unfilled at the present time.

About Instinet:
Instinet, through affiliates, is the largest global electronic agency securities broker and has been providing investors with electronic trading solutions for more than 30 years. Our services enable buyers and sellers worldwide to trade securities directly and anonymously with each other, have the opportunity to gain price improvement for their trades and lower their overall trading costs. Through our electronic platforms, our customers also can access over 40 securities markets throughout the world, including Nasdaq, the NYSE and stock exchanges in Frankfurt, Hong Kong, London, Paris, Sydney, Tokyo, Toronto and Zurich. We also provide our customers with access to research generated by us and by third parties, as well as various informational and decision-making tools. Unlike most traditional broker-dealers, we act solely as an agent for our customers and do not trade securities for our own account or maintain inventories of securities for sale.