Exhibit 10.29

FIRST AMENDMENT

THIS FIRST AMENDMENT(the "Amendment") is made and entered into effective as of
October 31, 2007 (the "Effective Date") by and betweenNORMANDY LEXINGTON ACQUISITION, LLC,a
Delaware limited liability company ("Landlord") andBLADELOGIC, INC., a Delaware corporation
("Tenant").

RECITALS

NOW, THEREFORE, in consideration of the above recitals which by this reference are incorporated herein, the mutual covenants and
conditions contained herein and other valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Landlord and Tenant agree as follows:

1.Term; Extension Option.



2.Expansion Premises.



1

---







3.Annual Base Rent; Tax Costs and Operating Expenses; Security Deposit.



2

---





4.Improvement Allowance; Refurbishment Allowance.



5.Parking.



3

---





6.Miscellaneous.



If by Regular Mail:

Normandy Lexington Acquisition, LLC
P.O. Box 30930
New York, New York 10087-0930If by Overnight Mail/Courier:

JP Morgan Chase - Lockbox Processing
Normandy Lexington Acquisition, LLC
Lockbox 30930
4 Chase Metrotech Center
Ground Level Courier on Willoughby Street
Brooklyn, NY 11245If by Wire Transfer:

Normandy Lexington Acquisition, LLC
Account No. 230460283
ABA: 021000021
Bank: JPMorgan Chase Bank
401 Madison Avenue
New York, NY 10017




4

---





[SIGNATURES ARE ON FOLLOWING PAGE]

5

---



IN WITNESS WHEREOF, Landlord and Tenant have duly executed this Amendment as of the day and year first above written.

|WITNESS/ATTEST:                               |  | LANDLORD:                                                                
|--------------------------------------------- |  | -------------------------------------------------------------------------
|                                              |  | NORMANDY LEXINGTON ACQUISITION, LLC, a Delaware limited liability company
|/s/LAURA J. ALLEN                             |  | By:                                                                      
|Name (print): Laura J. Allen                  |  | Name:                                                                    
|                                              |  | Title:                                                                   
|/s/LEONA MADDOCKSName (print): Leona Maddocks |  |                                                                          
|WITNESS/ATTEST:                               |  | TENANT:                                                                  
|                                              |  | BLADELOGIC, INC., a Delaware corporation                                 
|/s/MICHAEL J. CAYER                           |  | By:                                                                      
|Name (print): Michael J. Cayer                |  | Name:                                                                    
|                                              |  | Title:                                                                   
|/s/SCOTT E. CHASEName (print): Scott E. Chase |  |                                                                          

6

---



SCHEDULE 1

ANNUAL BASIC RENT

|Period                                                        |  | Basic Rent
Per RSF |                                       | Annual
Base Rent |   | Monthly Installment
of Base Rent
|------------------------------------------------------------- |  | ------------------ | ------------------------------------- | ---------------- | - | --------------------------------
|I.Original Premises.(31,697 s.f.)                             |  |                    |                                       |                  |   |                                 
|Through 9/30/2010                                             |  |                    | Per Section 1.2 of the Original Lease
|October 1, 2010 - February 28, 2011                           |  |                    | 29.00                                 |                  | $ | 919,213.00                      
|II.Expansion Premises.(15,941 s.f.).                          |  |                    |                                       |                  |   |                                 
|Expansion Premises Rent Commencement Date - February 28, 2009 |  |                    | 27.00                                 |                  | $ | 430,407.00                      
|March 1, 2009 - February 28, 2010                             |  | $                  | 28.00                                 |                  | $ | 446,348.00                      
|March 1, 2010 - February 28, 2011                             |  | $                  | 29.00                                 |                  | $ | 462,289.00                      
|III.Original Plus Expansion Premises. (47,638 s.f.).          |  |                    |                                       |                  |   |                                 
|March 1, 2011 - February 29, 2012                             |  | $                  | 30.00                                 |                  | $ | 1,429,140.00                    
|March 1, 2012 - February 28, 2013                             |  | $                  | 31.00                                 |                  | $ | 1,476,778.00                    

7

---



EXHIBIT A-1

PLAN OF EXPANSION PREMISES

GRAPHIC

8

---



EXHIBIT B

TENANT WORK LETTER

This Exhibit is attached to and made a part of the First Amendment by and between NORMANDY LEXINGTON ACQUISITION, LLC, a Delaware limited liability company
("Landlord") and BLADELOGIC, INC., a Delaware corporation ("Tenant") for certain space in the
Building known as "building 3" located at 10 Maguire Road, Lexington, Massachusetts 02421.

1.General.



2.Landlord Work; Labor Harmony.Tenant acknowledges and agrees that in the event any portion of the
construction of the Tenant Improvements interferes with, or in the reasonable judgment of Landlord may interfere with, the construction of any work to be performed by Landlord in the Building during
construction of the Tenant Improvements, in all such events the work on the Tenant Improvements shall take priority. If at any time construction of the Tenant Improvements shall cause disharmony,
interference or union disputes of any nature whatsoever, whether with contractors of the Landlord and/or other tenants or occupants of the Building, Landlord reserves the right, without any liability
to Landlord whatsoever, to immediately halt such construction of the Tenant Improvements and/or bar any offending contractors and/or subcontractors from the Building until such disharmony,
interference or union disputes may be resolved. Notwithstanding the foregoing, Tenant shall be permitted to use J. Calnan Associates for the performance of the Tenant Improvements.

3.Design and Schedule.



9

---





Tenant
shall not commence the Tenant Improvements until the following is provided to the Landlord:



10

---





5.Change Orders.If Tenant requests any change or addition to or subtraction from the Tenant Improvements
("Change Order") after Landlord's approval of the final and complete Construction Drawings and Specifications for the Tenant Improvements, Landlord
shall respond to Tenant's request for consent as soon as reasonably possible, but in no event later than ten (10) business days after being made, provided, however, Landlord will endeavor to
respond to Tenant's Change Order request within five (5) business days after receipt. Any changes, additions or modifications that Tenant desires to make to the Tenant Plans shall not be
unreasonably withheld, except that Landlord shall have complete discretion with regard to granting or withholding approval for the Building structure, system or appearance as provided in
Section 3.2 above. All costs incurred by Landlord in connection with such change orders shall by reimbursed by Tenant to Landlord, as additional rent, with fifteen (15) days of Tenant's
receipt of an invoice therefor.

6.Cooperation With Other Tenants.Tenant shall promptly remove from the common facilities any of Tenant's or
Tenant's contractors' or subcontractors' equipment, materials, supplies or other property deposited in the common facilities during the construction of the Tenant Improvements. Further, Tenant shall
at no time disrupt or allow disruption to any other existing tenant's or Building occupant's access to their premises or the Building, nor allow disruptions of mechanical, electrical, telephone and
plumbing services. In addition, Tenant shall not interrupt or interfere with the normal business operations of any other tenant or occupant of the Building, the Project or adjacent buildings. To the
extent construction of the Tenant Improvements does, or in the reasonable opinion of Landlord may, interrupt the normal business operations of any other tenant or occupant of the Building, the Project
or adjacent buildings, such portion of the Tenant Improvement work shall be performed after normal business hours at such times as are directed by Landlord.

7.Inspection by Landlord; Construction Supervision.Landlord shall have the right to inspect the Tenant
Improvements at all reasonable times. Landlord's failure to inspect the Tenant Improvements shall in no event constitute a waiver of any of Landlord's rights hereunder nor shall Landlord's inspection
of the Tenant Improvements constitute the Landlord's approval of same. Tenant shall pay Landlord a fee of $12,000 for construction management and supervision which shall be the total fee charged by
Landlord for construction review and oversight of the Tenant Improvements performed by Tenant and for which Tenant seeks payment from Landlord of the Improvement Allowance and the Additional
Improvement Allowance.

8.Completion of Tenant Improvements.Tenant shall notify Landlord in writing when the Tenant Improvements have
been substantially completed. Landlord shall thereupon have the opportunity to inspect the Tenant Improvements in order to determine if the Tenant Improvements have been substantially completed in
accordance with the Tenant Plans. If the Tenant Improvements have not been substantially completed in accordance with the Tenant Plans, Landlord shall immediately following

11

---



inspection,
provide Tenant with written notification of the items deemed incorrect or incomplete. Tenant shall forthwith proceed to correct the incorrect or incomplete items. Notwithstanding anything
to the contrary, the Tenant Improvements shall not be considered suitable for review by Landlord until all designated or required governmental inspections, permits and certifications necessary for the
Tenant Improvements, including, but not limited to a temporary or final certificate of occupancy, have been made, given and/or posted.

9.Tenant Improvement Allowance.



"Costs
of Tenant Improvements" shall mean the design and architectural costs to prepare the Tenant Plans, costs of all labor and materials, costs for removal of all construction debris,
general contractor's fees and any permit or license fees necessary for completion of construction of Tenant Improvements and shall include the construction management and supervisory fee described in
Section 7 above. Landlord shall be under no obligation to apply any portion of the Improvement Allowance for any purposes other than as provided in this Exhibit B, except that Tenant may
utilize up to $79,705.00 of the Improvement Allowance towards Tenant's costs associated with the purchase and
installation of furniture systems and wiring infrastructure in the Premises, nor shall Landlord be deemed to have assumed any obligations, in whole or in part, of Tenant to any contractors,

12

---



subcontractors,
supplier, workers or material men. Landlord shall be under no obligation to disburse any remaining portion of the Improvement Allowance if (i) there is a Default of Tenant under
the Lease at the time of request of such disbursement or at the time such disbursement is due from Landlord or (ii) any disbursement request is received after (x) December 1, 2008
with respect to the Improvement Allowance set forth in Section 9(a) hereof and (y) after September 30, 2011, with respect to the Additional Improvement Allowance set forth in
Section 9(b) hereof, and Tenant shall not thereafter be entitled to any such undisbursed portion of the Improvement Allowance. Additionally, if the Lease has terminated on or prior to the
Additional Improvement Allowance Date, Landlord shall be under no obligation to disburse any of the Additional Improvement Allowance.

13

---



QuickLinks