0001193125-05-056544 Sample Contracts

XENOGEN CORPORATION
Stock Option Award Agreement • March 21st, 2005 • Xenogen Corp • Measuring & controlling devices, nec • California

Unless otherwise defined herein, the terms defined in the 2004 Equity Incentive Plan will have the same defined meanings in this Award Agreement.

AMENDMENT NO. 4 TO MARINA VILLAGE NET OFFICE–TECH LEASE
Marina Village Net Office–tech Lease • March 21st, 2005 • Xenogen Corp • Measuring & controlling devices, nec

THIS AMENDMENT NO. 4 (“Amendment No. 4”) is made and entered into as of March 1, 2005 (the “Effective Date”), by and between ALAMEDA REAL ESTATE INVESTMENTS, a California limited partnership (“Landlord”), and XENOGEN CORPORATION, a Delaware corporation (“Tenant”).

AMENDMENT NO. 2 TO MARINA VILLAGE NET OFFICE–TECH LEASE
Marina Village Net Office-Tech Lease • March 21st, 2005 • Xenogen Corp • Measuring & controlling devices, nec

THIS AMENDMENT NO. 2 (“Amendment No. 2”) is made and entered into as of March 1, 2005 (the “Effective Date”), by and between ALAMEDA REAL ESTATE INVESTMENTS, a California limited partnership (“Landlord”), and XENOGEN CORPORATION, a Delaware corporation (“Tenant”).

XENOGEN CORPORATION
Restricted Stock Agreement • March 21st, 2005 • Xenogen Corp • Measuring & controlling devices, nec

Unless otherwise defined herein, capitalized terms defined in the 2004 Director Stock Plan shall have the same defined meanings in this Restricted Stock Agreement (the “Agreement”).