Archipelago Holdings, Inc. To Release 2004 Third Quarter Results On October 25

Archipelago Holdings, Inc. (PCX:AX), owner and operator of the Archipelago Exchange(SM) (ArcaEx(R)), will release its results for the third quarter of 2004 on Monday, October 25, 2004 and will hold a conference call later that day at approximately 3:00 pm Central Time to review the results with the investment community.

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

Calling from the USA or Canada: 800-638-5495
Calling from other countries: 617-614-3946
Conference ID: 99743086

Results will be available in the Investors Relations section at www.archipelago.com on October 25, 2004. Visitors to www.archipelago.com will be able to listen to an archived copy of the conference call webcast for one month following the call.