International Securities Exchange Elects Jason Lehman To Board Of Directors

The International Securities Exchange (ISE) said today that Jason Lehman, Managing Director and head of the Global Options business at Citadel Investment Group LLC, joined its Board of Directors. The ISE Board consists of 15 members, six industry directors, eight non-industry directors and ISE's Chief Executive Officer. Mr. Lehman will serve as one of the two representatives of ISE's Primary Market Makers (PMMs). Mr. Lehman replaces Scott Prince, Managing Director, Goldman, Sachs and Co., SLK-Hull Derivatives LLC.

"ISE is pleased to elect Jason to its board of directors. He has helped to build Citadel's derivatives group into a major force in the options industry," said David Krell, ISE's president and Chief Executive Officer. "We believe that his appointment will bring an important perspective to ISE's Board of Directors."

Mr. Lehman joined Citadel in 1996 as a trader in the Japanese Convertible Bond Trading Group. During his tenure with the organization, he has also worked on the statistical high frequency trading and private investments teams, making significant contributions in both areas.

Mr. Lehman received a BS in Economics from the Wharton School of the University of Pennsylvania.