CHICAGO, July 5 /PRNewswire-FirstCall/ -- Archipelago Holdings, Inc. (PCX: AX), owner and operator of the Archipelago Exchange(SM) (ArcaEx(R)), will release its results for the second quarter of 2005 on Monday, July 25, 2005 at 4:00 PM ET, and will hold a conference call at approximately 5:00 PM ET to review the results with the investment community.

The call will be webcast live from Archipelago's Investor Relations webpage available at http://www.archipelago.com and will be accessible by telephone at the following numbers:

Calling from the USA or Canada: 800-510-9661
Calling from other countries: 617-614-3452
Participant Passcode: 99747686

Results will be available in the Investors Relations section at http://www.archipelago.com on July 25, 2005. Visitors to http://www.archipelago.com will be able to listen to an archived copy of the conference call webcast for one month following the call.

About Archipelago

Archipelago Holdings, Inc. (PCX: AX) owns and operates the Archipelago Exchange (ArcaEx). ArcaEx is the first totally open all-electronic stock market in the United States. Through its alliance with the Pacific Exchange, Inc., Archipelago operates ArcaEx as the exclusive equities trading facility of PCX Equities, Inc. Through ArcaEx, Archipelago customers can trade over 8,000 equity securities, including securities listed on the New York Stock Exchange(R), Nasdaq(R), American Stock Exchange(R) and Pacific Exchange(R). ArcaEx is regulated by the Pacific Exchange. The Archipelago ECN, a precursor to ArcaEx, was one of the four original ECNs, formed in December 1996 with Townsend Analytics.

"Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: Statements in this press release regarding Archipelago Holdings, Inc.'s business which are not historical facts are "forward-looking statements" that involve risks and uncertainties. For a discussion of such risks and uncertainties, which could cause actual results to differ from those contained in the forward-looking statements, see "Risk Factors" in the Company's Annual Report or Form 10-K for the most recently ended fiscal year.

SOURCE Archipelago Holdings, Inc.
07/05/2005
CONTACT: Media, Margaret Nagle, +1-312-442-7083, or Investor Relations,
Patrick Murphy, +1-312-442-7005, both of Archipelago Holdings, Inc.
/Web site: http://www.archipelago.com
(AX)