Corrected: Archipelago Holdings, Inc. Announces Change To Start Time For Earnings Results Conference Call Scheduled For October 25

Archipelago Holdings, Inc. (PCX:AX), owner and operator of the Archipelago Exchange(SM) (ArcaEx(R)), announced today that the Company is changing the start time of its third quarter 2004 earnings conference call which is taking place on Monday, October 25, 2004. The call will now begin at 7:30 am Central Time instead of 3:00 pm Central Time as previously announced. The release will be issued at 7:00 am Central Time on Monday.

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.