CHICAGO, July 19, 2005 /PRNewswire-FirstCall via COMTEX/ -- The Archipelago Exchange(SM) (ArcaEx(R)), the nation's first totally open, all-electronic stock exchange, today announced that A4S Security, Inc., a developer and distributor of digital video surveillance systems for public transportation and law enforcement, has dually listed on ArcaEx, a facility of the Pacific Exchange under the symbol: SWATU. The dual listing is in conjunction with A4S Security's initial public offering.

"We are pleased to welcome A4S Security to our growing roster of ArcaEx-listed companies," said Sam Long, Managing Director of ArcaEx's Corporate Client Group. "At ArcaEx, a fair and open trading environment designed to foster competition and transparency provides an investor-friendly environment and an ideal-listing venue for companies such as A4S Security."

"As a company seeking to provide investors an open, transparent trading environment, ArcaEx is the perfect exchange to list on," commented Tom Marinelli, CEO of A4S Security, Inc. "We believe our listing on ArcaEx will help us gain exposure and increase recognition across the investment 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-, Amex- and Nasdaq-listed stocks.

About ArcaEx

Archipelago Holdings (PCX: AX) operates The Archipelago Exchange(SM) (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 Pacific Exchange(R). 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.

About A4S Security, Inc.

A4S Security, Inc., headquartered in Loveland, Colorado, markets high resolution, full motion mobile digital video surveillance systems for use in public transportation and law enforcement. A4S Security uses a proprietary patent pending redundant recording technology, which assures the security and long shelf-life of the stored data. ShiftWatch(R), A4S's mobile digital recording product line, is the only mobile digital video surveillance product that uses two redundant modes of digital video capture and storage, a stationary hard disc as well as removable digital video tape, for maximum safety, security and effectiveness in the event of any portentous incident. Using industrial grade components, A4S's systems are designed to handle extreme environmental, high shock and vibration environments. The systems utilize non proprietary software for playback which provides extreme flexibility when managing or reconstructing incidents.

Forward-Looking Statements

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.

Contact:
Archipelago
Margaret Nagle
312-442-7083

SOURCE The Archipelago Exchange

Margaret Nagle of Archipelago, +1-312-442-7083