PENWEST PHARMACEUTICALS CO Contracts & Agreements

(In thousands, except share (Filed With SEC on May 10, 2010)

Working closely with Endo to maximize the value of Opana ER (Filed With SEC on March 16, 2010)

EX-10.1 Settlement Agreement dated May 5, 2009 (Filed With SEC on August 10, 2009)

Ex-10.1 Rights Agreement, dated as of March 11, 2009 (Filed With SEC on May 11, 2009)

Ex-10.2 Third Amendment, signed March 31, 2009, to the Amended and Restated Strategic Alliance Agreement, dated as of April 2, 2002 (Filed With SEC on May 11, 2009)

EX-10.26 Summary of Executive Officer Bonus Program (Filed With SEC on March 16, 2009)

EX-10.27 Summary of the Director Compensation Program (Filed With SEC on March 16, 2009)

EX-10.34 Form of Executive Retention Agreements (Filed With SEC on March 16, 2009)

Ex-4.1 Rights Agreement, dated as of March 11, 2009 (Filed With SEC on March 12, 2009)

Ex-10.1 Second Amendment, dated July 14, 2008, to the Amended and Restated Strategic Alliance Agreement (Filed With SEC on November 10, 2008)

EX-10.1 2005 STOCK INCENTIVE PLAN, AS AMENDED (Filed With SEC on August 8, 2008)

EX-4.1 - Amendment No. 3 to Rights Agreement (Filed With SEC on April 23, 2008)

Ex-4.1 Amendment No.2 to Rights Agreement (Filed With SEC on March 20, 2008)

Ex-4.1 Amendment to Rights Agreement (Filed With SEC on March 6, 2008)

Ex-10.1 Securities Purchase Agreement (Filed With SEC on March 6, 2008)

Ex-10.2 Form of Warrant (Filed With SEC on March 6, 2008)

EX-10.1 COLLABORATION AND LICENSE AGREEMENT DATED JULY 16, 2007 (Filed With SEC on November 8, 2007)

Ex-10.1 Second Amendment to Lease, dated June 6, 2006 and Third Amendment to Lease, dated April 13, 2007 (Filed With SEC on August 8, 2007)

EX-10.4 Severance and Settlement Agreement and Release (Filed With SEC on May 10, 2007)

EX-10.5 Credit and Security Agreement (Filed With SEC on May 10, 2007)

EX-10.1 Amendment, dated January 7, 2007 (Filed With SEC on February 15, 2007)

EX-10.1 BAICHWAL TERMINATION AGREEMENT (Filed With SEC on February 5, 2007)

EX-10.2 STANIFORTH TERMINATION AGREEMENT (Filed With SEC on February 5, 2007)

EX-10.1 Amendment No.1 to 2005 Stock Incentive Plan (Filed With SEC on November 9, 2006)

EX-10.1 Offer Letter Benjamin L. Palleiko (Filed With SEC on August 9, 2006)

EX-10.28 Form of Executive Retention Agreement (Filed With SEC on March 16, 2006)

EX-10.29 Summary Description of Officer Bonus Program (Filed With SEC on March 16, 2006)

EX-10.1 2005 STOCK INCENTIVE PLAN (Filed With SEC on June 7, 2005)

EX-10.2 FORM OF INCENTIVE STOCK OPTION AGREEMENT (Filed With SEC on June 7, 2005)

EX-10.3 FORM OF EMPLOYEEE NONSTATUTORY STOCK OPTION (Filed With SEC on June 7, 2005)

EX-10.4 FORM OF NONSTATUTORY STOCK OPTION AGREEMENT (Filed With SEC on June 7, 2005)

EX-10.5 FORM OF DIRECTOR RESTRICTED STOCK AGREEMENT (Filed With SEC on June 7, 2005)

Ex-10.1 Severance and Settlement Agreement and Release (Filed With SEC on May 9, 2005)

Ex-10.2 Supplemental Executive Retirement Plan (Filed With SEC on May 9, 2005)

Ex-10.3 Deferred Compensation Plan (Filed With SEC on May 9, 2005)

Ex-10.4 Offer Letter to Robert J. Hennessey (Filed With SEC on May 9, 2005)

Ex-10.19 Summary Description of Directors Compensation (Filed With SEC on March 16, 2005)

Ex-10.22 Form of Option Agreement for 1997 Incentive Plan (Filed With SEC on March 16, 2005)

EX-10.1 Lease Amendment Dated March 15, 2004 (Filed With SEC on August 3, 2004)

EX-10.1 LEASE AGREEMENT DATED FEBRUARY 3, 2003 (Filed With SEC on May 15, 2003)

Ex-10.1 Amend. & Restated Strategic Alliance Agmnt (Filed With SEC on August 14, 2002)

EX-10.1 ROYALTY AGREEMENT DATED SEPTEMBER 25, 1992 (Filed With SEC on May 15, 2002)

EX-10.2 CONFIDENTIALITY, CONSULTING AND NONCOMP (Filed With SEC on May 15, 2002)

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PENWEST PHARMACEUTICALS CO Contracts & Agreements