ISE Intl Secs Exchange Hldgs

The Board of Directors of the International Securities Exchange (NYSE:ISE) today declared a quarterly dividend of $0.05 per outstanding share of its Class A Common Stock. The dividend is payable on June 30, 2006, to holders of record as of the close of business on June 23, 2006. ISE Background The International Securities Exchange (ISE) is 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 LLC will launch in the third quarter of 2006 with strategic partners, offering an innovative MidPoint Match platform, followed by a fully integrated displayed Best Bid Offer (BBO) market in the fourth quarter. ISE is also a majority owner of Longitude LLC, an innovative platform for events markets trading, and 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 and for more information about the ISE Stock Exchange LLC, visit www.isestock.com.