International Securities Exchange Holdings Announces Date of Third Quarter 2006 Earnings Release and Conference Call

The International Securities Exchange Holdings, Inc.
(NYSE: ISE) announced today that it will issue its earnings release
for the third quarter of 2006 on Wednesday, October 25, 2006 before
the financial markets open. The Company will host a conference call at
8:30 a.m. Eastern Time to discuss the results with the investment
community. All interested parties can listen to a live audio webcast
that will be hosted on the Investor Relations section of the Company's
web site at www.iseoptions.com. An investor presentation that will be
referenced during the call will also be posted to the web site.
   The conference call can also be accessed by calling [phone]
and dialing the participant passcode 14293198. Please reserve a line
15 minutes prior to the start of the conference call. The conference
call replay will be available from 10:30 a.m. on October 25, 2006
until midnight on October 26, 2006 and can be accessed by calling
[phone] and dialing the participant passcode 44893091. An
archived replay of the call will be available on the Investor
Relations section of the Company's web site at www.iseoptions.com.

   ISE Background

   International Securities Exchange Holdings, Inc. (ISE Holdings) is
the parent company of International Securities Exchange, LLC (ISE).
ISE operates an innovative securities market, founded on the principle
that technology and competition create better, more efficient markets
for investors. ISE is the largest equity options exchange and is among
the leading options exchanges in the world. ISE developed a unique
market structure for advanced screen-based trading systems and in May
2000 launched the first fully electronic US options exchange. The ISE
Stock Exchange launched in September 2006 with strategic partners and
offers an innovative MidPoint Match platform, which will be followed
by a fully integrated displayed Best Bid Offer market in the fourth
quarter. ISE Holdings is also a majority owner of Longitude LLC, which
operates an innovative platform for events markets trading.
Additionally, ISE offers enhanced market data products for
sophisticated investors.

   ISE continually enhances its trading systems and develops new
products, including index options and market data, to provide
investors with the best marketplace and investment tools to trade
smarter. For more information about ISE, its options products and its
technology, visit www.iseoptions.com, for more information about the
ISE Stock Exchange, visit www.isestock.com and for more information
about Longitude, visit www.longitude.com.