International Securities Exchange Chief Executive Officer and Chief Operating Officer Adopt Personal Stock Trading Plans

The International Securities Exchange, Inc. (NYSE:ISE)
announced today that President and Chief Executive Officer, David
Krell, and Chief Operating Officer, Gary Katz, have each adopted a
written stock trading plan in accordance with Rule 10b5-1 of the
Securities Exchange Act of 1934 and ISE's policies with respect to
insider sales. These plans will allow them to facilitate personal
portfolio diversification, financial planning and tax planning
strategies over a period of time.
   Under the terms of the plans, Mr. Krell can exercise options on up
to 400,000 shares and sell the shares over a ten month period
beginning on March 23, 2006. This would represent less than 21% of his
current ISE holdings. In addition, he plans to donate charitable gifts
of 40,000 shares during this period. Mr. Katz can exercise options on
up to 236,000 shares and sell the shares over an eight month period
beginning on March 23, 2006. In total, this would represent less than
19% of his current ISE holdings. Mr. Katz plans to donate a charitable
gift of 7,000 shares on March 20, 2006.
   Each of these plans was adopted during an authorized trading
period when the individuals were not in possession of material,
non-public information. Once the plans are executed, Mr. Krell and Mr.
Katz will not retain any discretion over the shares traded as the
broker administering the plan is authorized to trade the securities in
volumes and at prices determined independently by the broker subject
to the limitations set forth in the plan.

   ISE Background

   The International Securities Exchange, the world's largest equity
options exchange, was founded on the principle that technology fosters
and infuses new efficiencies and operational innovations into
securities trading. After developing an innovative market structure
that integrated auction market principles into an advanced
screen-based trading system, ISE launched the first fully electronic
US options exchange in May 2000. ISE continually enhances its trading
systems to provide investors with the best marketplace to execute
their options orders.
   For more information about ISE, its products and its technology,
visit www.iseoptions.com.