September 16, 2010 Google Inc. Attn: Lease Administration

Exhibit 10.26

September 16, 2010

Google Inc.

Attn:  Lease Administration

0000 Xxxxxxxxxxxx Xxxxxxx

Xxxxxxxx Xxxx, XX  00000

Re:           Lease Agreement dated as of February 1, 2007, by and between Google, Inc.

successor in interest to DoubleClick, Inc. and Epsilon Data Management, LLC (“Lease”)

Dear Sir/Madam:

Pursuant to Article 29 of the Lease, Tenant hereby requests an extension of the Lease.  Article 29 suggests that the extension shall be for thirty (30) months; however, Tenant understands that Landlord wants the Tenant to move out of the Premises.  As a compromise, Tenant only seeks an extension for eighteen (18) months.  Such time will enable Tenant to prepare a suitable replacement site and execute a move out of the Thornton facility.

Please confirm your agreement to this extension below.

Sincerely,

Epsilon Data Management, LLC

/s/ Xxxxxxxx Xxxxxxxxxx

Xxxxxxxx Xxxxxxxxxx

Vice President and Assistant General Counsel

ACCEPTANCE:

Google, Inc. agrees to extend the Lease for eighteen (18) additional months until July 31, 2013.

GOOGLE, INC.

/s/ Xxxxx Xxxxx

cc:           Xxxxx Xxxxx

00000 Xxxxx Xxxxxx

Xxxxxxxx, XX  00000