Archipelago Holdings, Inc. To Release 2005 Second Quarter Results On July 25th

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.