ISE Intl Secs Exchange Hldgs

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.