GENSYM CORP Contracts & Agreements

AMENDED AND RESTATED SEVERANCE BENEFITS AGREEMENT (Filed With SEC on September 21, 2007)

AGREEMENT AND PLAN OF MERGER (Filed With SEC on August 13, 2007)

STOCKHOLDER AGREEMENT (Filed With SEC on August 13, 2007)

SEVERANCE BENEFITS AGREEMENT (Filed With SEC on June 8, 2007)

Gensym Corporation OEM AGREEMENT (Filed With SEC on June 6, 2007)

GENSYM CORPORATION 52 SECOND AVENUE BURLINGTON, MA 01803 August 3, 2006 (Filed With SEC on August 25, 2006)

Page 2 of 6 (Filed With SEC on August 22, 2006)

GENSYM CORPORATION 52 SECOND AVENUE BURLINGTON, MA 01803 August 3, 2006 (Filed With SEC on August 8, 2006)

GENSYM CORPORATION (Filed With SEC on March 24, 2006)

52 SECOND AVENUE BURLINGTON, MA 01803 (Filed With SEC on January 31, 2006)

FIRST AMENDMENT OF LEASE (Filed With SEC on December 21, 2005)

PROFESSIONAL SERVICES AGREEMENT by and between GENSYM CORPORATION and MARKET-PARTNERS INC. (Filed With SEC on November 14, 2005)

INDEPENDENT CONTRACTOR AGREEMENT (Filed With SEC on April 27, 2005)

SEVERANCE BENEFITS AGREEMENT (Filed With SEC on March 31, 2005)

GENSYM CORPORATION (Filed With SEC on March 31, 2005)

GENSYM CORPORATION 52 SECOND AVENUE BURLINGTON, MA 01803 August 16, 2004 (Filed With SEC on August 30, 2004)

GENSYM CORPORATION 52 SECOND AVENUE BURLINGTON, MA 01803 August 19, 2004 (Filed With SEC on August 30, 2004)

GENSYM CORPORATION (Filed With SEC on August 30, 2004)

SEVERANCE BENEFITS AGREEMENT (Filed With SEC on August 30, 2004)

Form of Option Agreement for use with 2000 Stock Incentive Plan (Filed With SEC on August 16, 2004)