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Exhibit 10.10.1


FIRST AMENDMENT TO OFFICE LEASE

        This FIRST AMENDMENT TO OFFICE LEASE (this "First Amendment") is executed as of March 31, 2006 (the "Effective Date") by and between HOUSTON COMMUNITY COLLEGE SYSTEM, a local governmental entity organized pursuant to the Texas Education Code ("Landlord") and PROS REVENUE MANAGEMENT, L.P., a Texas limited partnership, formerly PROS Revenue Management, Inc, ("Tenant").


Introduction

        A.    Landlord and Tenant entered into that certain Office Lease dated as of January 31, 2001 (the "Original Lease") covering 73,200 square feet of RSF (as defined in the Original Lease) on floors 9 and 10 of the Building (as defined in the Original Lease) commonly known as the ComTech Center, Houston, Harris County. Texas, and being described in the Original Lease as the "Premises" after including therein the Subsequent Premises (as defined in the Original Lease).

        B.    The Original Lease is for a term expiring on the Expiration Date (as defined in the Original Lease) and which is currently May 31, 2006.

        C.    Landlord and Tenant desire to further amend the Original Lease subject to the specific terms and conditions of this First Amendment, but not otherwise.

        NOW THEREFORE, in consideration of the of the mutual covenants and agreements contained herein and for Ten and No/100 Dollars ($10.00) and other good and valuable consideration to each party, the receipt and sufficiency of which are hereby acknowledged, Landlord and Tenant, intending to be legally bound, hereby agree as follows:

        1.    Capitalized Terms.    Capitalized terms that are used herein but not defined in this First Amendment shall have the meanings given to them in the Original Lease. The term "Lease" as used in this First Amendment shall mean the Original Lease as amended by this First Amendment.

        2.    Premises.    Landlord and Tenant acknowledge and agree that the Premises is comprised of "Floor 9" and "Floor 10" of that certain Condominium Declaration for the 3100 Main Condominium recorded under Clerk's File No. W441927 of the Official Public Records of Real Property of Harris County, Texas on February 20, 2003 (the "Condominium Declaration" and that the Premises consists of 73,200 RSF.

        3.    Base Rent.    Paragraph 1.D of the Original Lease is hereby amended to provide that from and after June 1, 2006 Base Rent will be as follows and otherwise Base Rent will remain unchanged:

DATE
  RATE
6/1/06 to 5/31/08   $14.75/RSF
6/1/08 to 5/31/09   $15.75/RSF
6/1/09 to 7/31/11   $16.50/RSF

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        4.    Rental Abatement.    


"RENTAL ABATEMENT"

        5.    Tenant's Pro Rata Share.    Paragraph 1.E of the Original Lease is hereby amended and restated in its entirety to read as follows:

        6.    Base Year.    

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        7.    Term.    Paragraph 1.G of the Original Lease is hereby amended and restated in its entirety to read as follows:

        8.    Notice Addresses.    Paragraph 1.L of the Original Lease is hereby amended and restated in its entirety to read as follows:

Notices to Tenant shall be sent to Tenant at the Premises    

with a copy to Thompson & Knight LLP
333 Clay Street, Suite 3300
Houston, Texas 77002
Attn: Susan A. Stanton

 

 

Notices to Landlord shall be sent to:

 

With a copy to:

Houston Community College System
3100 Main Street, 12th Floor
Houston, Texas 77002
Attention: Mark Lambert
                    Director of Building Operations

 

Bracewell & Giuliani LLP
711 Louisiana, Suite 2300
Houston, Texas 77002
Attention: Ron I. Erlichman"

        9.    Definition of Rent.    Paragraph 4.A of the Original Lease is hereby amended as follows:

        10.    Operating Expenses Defined.    

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        11.    Audit.    Paragraph 4.G of the Original Lease is hereby amended to provide that the "Audit Election Period" shall be within ninety (90) days after Landlord furnishes its statement of actual Operating Expenses for any calendar year (including the Base Year).

        12.    Parking.    

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        13.    Taxes Attributable to the Premises.    

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        14.    Refurbishment Allowance.    The following is hereby added as Paragraph 4.J to the Original Lease:

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        15.    Building Management.    The following is hereby added to the Original Lease as Paragraph 7.E:

        16.    Tax Waiver.    Paragraph 32.K of the Original Lease is hereby amended and restated in its entirety as follows:

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        17.    Renewal Option: Right of First Offer.    Rider 1 of the Original Lease is hereby amended (but not restated) as follows:


"RIGHT OF FIRST OFFER

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"ARBITRATION

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        18.    Existing Claims.    Tenant hereby waives any claims, damages, suits, liabilities costs or expenses ("Claims") it may have against Landlord with respect to the Lease or all or any part of the Property to the extent such Claims are related to the payment of Taxes, the Tax Penalties and/or the operation or management of the Property and which arose prior to the Effective Date, but not any such Claims arising from and after the Effective Date.

        19.    Brokers.    Tenant represents that it has dealt only with Cushman & Wakefield of Texas, Inc. ("Tenant's Broker") in connection with this First Amendment. Tenant agrees to indemnify, defend, protect and hold Landlord harmless from all claims of any broker, agent or similar person or entity (other than Tenant's Broker) arising by, through or under Tenant and in connection with the Property or this First Amendment. Landlord shall pay a real estate commission to Tenant's Broker equal to four percent (4%) times the Base Rent (and not including Additional Rent, Taxes or Excess Operating Expenses) due by Tenant during the portion of the Term commencing on June 1, 2006 and ending on July 31, 2011, less the abatements provided for in Section 4 of this First Amendment (other than the Parking Abatement).

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        20.    Successors and Assigns.    The obligations in this First Amendment shall be binding upon and inure to the benefit of the successors and assigns of Landlord, and shall be binding upon and inure to the benefit of the permitted successors and assigns of Tenant.

        21.    Original Lease In Full Force and Effect.    The Original Lease remains in full force and effect and is unchanged except specifically modified by the provisions of this First Amendment. In the event of any conflicts between the terms of the Original Lease and this First Amendment, the terms of this First Amendment shall control.

        22.    Entire Agreement.    This First Amendment and the Original Lease contain all the agreements of the parties regarding the matters discussed in this First Amendment, and no prior agreement, understanding or representation about any such matter is effective for any purpose. The terms and conditions of this First Amendment may not be amended or otherwise affected except by instrument in writing executed by each party to be bound by the instrument. All references in the Original Lease to the "Lease" shall mean and refer to the Original Lease as amended by this First Amendment.

EXECUTED to be effective for all purposes as of the Effective Date.

TENANT:   LANDLORD:

PROS Revenue Management, L.P. (formerly Houston Community College System PROS Revenue Management, Inc.)

By:

/s/ Charles H. Murphy  


 

By:

/s/ Bruce Leslie  

Name: Charles H. Murphy
  Name: Bruce Leslie
Title: EVP & CFO
  Title: Chancellor

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Exhibit "A"

9th Floor Credit Space

[GRAPHIC OF FLOORPLAN]

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QuickLinks

FIRST AMENDMENT TO OFFICE LEASE
Introduction
"RENTAL ABATEMENT"
" RIGHT OF FIRST OFFER
Exhibit "A" 9th Floor Credit Space