MATRIXONE INC Contracts & Agreements

AGREEMENT AND PLAN OF MERGER by and among (Filed With SEC on March 2, 2006)

Confidential Materials omitted and filed separately with the Securities and Exchange Commission. Asterisks denote such omissions. (Filed With SEC on November 15, 2005)

AMENDMENT TO SYNCHRONICITY AGREEMENTS (Filed With SEC on November 9, 2005)

MatrixOne Sales Compensation Plan Amendment (Filed With SEC on November 8, 2005)

[Letterhead] (Filed With SEC on November 8, 2005)

2005 Management Incentive Bonus Plan (Filed With SEC on November 8, 2005)

AGREEMENT AND PLAN OF MERGER dated as of June 4, 2004 by and among MATRIXONE, INC., MATRIXONE INTERNATIONAL, INC., (Filed With SEC on August 10, 2004)

PAYMENT, EXCHANGE AND ESCROW AGREEMENT datedas of August 4, 2004 among (Filed With SEC on August 10, 2004)

REGISTRATION RIGHTS AGREEMENT dated as ofAugust 4, 2004 by and between (Filed With SEC on August 10, 2004)

[LOGO APPEARS HERE] (Filed With SEC on May 12, 2004)

LOAN MODIFICATION AGREEMENT (Filed With SEC on February 11, 2004)

EMPLOYMENT AGREEMENT (Filed With SEC on February 11, 2004)

[MatrixOne LOGO] (Filed With SEC on February 11, 2004)

[MatrixOne logo] (Filed With SEC on September 5, 2003)

LOAN MODIFICATION AGREEMENT (Filed With SEC on February 11, 2003)

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MATRIXONE INC Contracts & Agreements