The Archipelago Exchange(SM) (ArcaEx(R)) Announces Exclusive Listing of ZAP

The Archipelago Exchange(SM) (ArcaEx(R)) Announces Exclusive Listing of ZAP

Tuesday June 21, 9:35 am ET

CHICAGO, June 21 -- The Archipelago Exchange(SM) (ArcaEx?), the world's largest fully-electronic stock exchange, today announced that Zero Air Pollution? (ZAP), a leader in the advancement of transportation technologies and energy products, has listed exclusively on ArcaEx, a facility of the Pacific Exchange, under the four character ticker symbol: ZAAP.

"Like ArcaEx, ZAP is a leader and an innovator in their industry, and we look forward to serving as a fair and transparent marketplace for the company and its shareholders," said Jerry Putnam, CEO of the Archipelago Exchange.

"We are excited to list on an exchange that focuses on efficiency much like we do," said Steve Schneider, CEO of ZAP. "ArcaEx offers ZAP the opportunity to increase awareness in the investor community."

In addition to providing the advantages of electronic trading, ArcaEx enables NYSE-, Amex- and Nasdaq-listed companies and their investors to reap the benefits of ArcaEx's investor focused market structure. ArcaEx operates as an all-electronic auction market, with an open limit order book matching buyers and sellers directly based on simple price and time priority, leveling the playing field for all market participants.

Currently over 230 companies are listed on ArcaEx, a facility of the Pacific Exchange. In addition to its own listings, the exchange trades all NYSE, Nasdaq, and Amex listed stocks. Archipelago Holdings, Inc., the parent company of ArcaEx, announced on January 3, 2005 that the company has entered into a definitive agreement to acquire PCX Holdings, Inc., parent company of the Pacific Exchange and PCX Equities, Inc.

About ArcaEx

Archipelago Holdings (PCX: AX- News) operates The Archipelago Exchange(SM) (ArcaEx?) 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?, American Stock Exchange?, and Pacific Exchange?. In addition to offering core execution services, ArcaEx provides corporate clients with listing services and innovative data products. In 2004, Archipelago launched ArcaVision to provide corporate and trading clients with more transparent market data, analytical tools and access to market-wide and ArcaEx specific trading information. Archipelago Holdings completed its initial public offering in August 2004. For more information please visit http://www.arcaex.com.