Document:

Sixth Amendment to Lease Agreement

 Exhibit 10.52 
 SIXTH AMENDMENT TO LEASE 
 THIS SIXTH AMENDMENT TO LEASE (this “Sixth Amendment”) is made
and entered into this 29th day of February, 2008 (“Execution Date”) by and between RFP Lincoln 293, LLC, a Massachusetts limited liability company, assignee of the leasehold interest of Bronx II, LLC, successor-in-interest to Rosewood III
Associates, L.P. (“Landlord”) and Merrimack Services Corporation, a Delaware corporation, successor-in-interest to PC Connection Sales of Massachusetts, successor to PC Connection Inc., successor to Merisel Americas, Inc., successor to
Microamerica, Inc. (“Tenant”). 
 WITNESSEE 11: 
 WHEREAS, Landlord and Tenant have heretofore entered into that certain Lease, dated
October 27, 1988 (the “Original Lease”), as amended by Lease Amendment dated October 27, 1988 (the “First Amendment”), a Second Lease Amendment dated November 12, 1997 (the “Second Amendment”), a Third
Amendment to Lease dated December 8, 1998 (the “Third Amendment”), a Fourth Amendment to Lease dated August 30, 2001 (the “Fourth Amendment”), and a Fifth Amendment to Lease dated September 24, 2004 (the
“Fifth Amendment and collectively with the Original Lease and foregoing amendments, the “Lease”) with respect to 19,882 square feet of office space (“Demised Premises”) located on the second (2nd) floor of the building within that certain building commonly known as 293 Boston Post Road West, Marlborough, Massachusetts (the “Building”);
and 
 WHEREAS, Tenant wishes to: (i) extend the Term of the Lease in respect of
the remaining portion of the Demised Premises, containing 19,882 square feet on the second (2nd) floor (west) of the Building (“Remainder
Premises”), substantially as shown cross-hatched on Exhibit A, Sixth Amendment to Lease, a copy of which is attached hereto and incorporated by reference herein; 
 NOW, THEREFORE, in consideration of the premises herein contained, and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, Landlord and Tenant hereby agree as follows:

  

	1.	EXTENSION OF TERM OF LEASE IN RESPECT OF REMAINDER PREMISES 

 The Term of the Lease in respect of the Remainder Premises is hereby extended for an additional term commencing on January 1, 2009 and expiring as of December 31, 2011 (“Additional Term”). Said
Additional Term shall be upon all of the same terms and conditions of the Lease in effect immediately preceding the commencement of such Additional Term (including, without limitation, Tenant’s obligation to pay for electricity, pursuant to
Section 4.2.3 of the Lease), except as follows: 
  

 Annual Fixed Rent during the extended Term shall be as follows: 
  

										
	 Time Period
	  	Annual
Fixed Rent	  	PSF	  	Per Month
	 January 1, 2009 – December 31, 2009:
	  	$	377,758.00	  	$	19.00	  	$	31,479.83
	 January 1, 2010 – December 31, 2010:
	  	$	387,699.00	  	$	19.50	  	$	32,308.25
	 January 1, 2011 – December 31, 2011:
	  	$	397,640.00	  	$	20.00	  	$	33,136.67

 B. The Tax Base during the Additional Term shall be the actual amount of Taxes for calendar year
2005. 
 C. The Operating Expense Base during the Additional Term shall be the actual amount of Operating Expenses for calendar year 2005,
determined as though the Building were 95% occupied. 
 D. Tenant’s Share of Tax and Operating Expense Escalation during the Additional
Term shall be 10%. 
 E. In the event that any of the provisions of the Lease are inconsistent with this Amendment or the state of facts
contemplated hereby, the provisions of this Amendment shall control. 
  

	2.	SECURITY DEPOSIT 

 The parties hereby acknowledge
that Landlord is holding a security deposit in the amount of Twenty-Nine Thousand and 00/100 Dollars ($29,000.00) pursuant to the terms of the Fifth Amendment. Landlord shall retain the balance of the security deposit in the amount of Twenty-Nine
Thousand and 00/100 Dollars ($29,000.00) for the Additional Term as well as the First Option Term and Second Option Term, if exercised (“Remaining Security Deposit”). Said Remaining Security Deposit shall otherwise continue to be held by
Landlord during the Additional Term in accordance with the terms and conditions of Article 11 of the Lease. 
  

	3.	OPTION TO EXTEND 

 A. Tenant shall have the option
to extend the term of the Lease for two (2) additional two (2) year periods (collectively, the “Option Terms”). The first option term (“First Option Term”) shall commence as of January 1, 2012 and terminate as of
December 31, 2013 and the second option term (“Second Option Term” and together with the First Option Term, each an “Additional Option Term”) shall commence as of January 

 
1, 2014 and terminate as of December 31, 2015. The terms and conditions of the Lease shall apply during each Additional Option Term except for Base Rent
which will be adjusted as provided below. 
 B. To exercise the First Option Term, Tenant shall provide written notice to Landlord on or
before April 1, 2011 and to exercise the Second Option Term, Tenant shall provide written notice to Landlord on or before April 1, 2013 (“Option Notice”), in each case time being of the essence. Failure of Tenant to timely
exercise the First Option Term shall terminate its rights to exercise the First Option Term and Second Option Term. Failure of Tenant to timely exercise the Second Option Term during the First Option Term shall terminate its rights to exercise the
Second Option Term. 
 C. The Lease terms during each Additional Option Term shall be upon all of the same terms and conditions of the Lease
in effect immediately preceding the commencement of such Additional Term and/or Additional Option Term (including, without limitation, Tenant’s obligation to pay for electricity, pursuant to Section 4.2.3 of the Lease). The Annual Fixed
Rent during each Additional Term shall be fixed as follows: 
 Fixed Rent during the First Option Term shall be as follows: 
  

										
	 Time Period
	  	Annual
Fixed Rent	  	PSF	  	Per Month
	 January 1, 2012 – December 31, 2012:
	  	$	407,581.00	  	$	20.50	  	$	33,965.08
	 January 1, 2013 – December 31, 2013:
	  	$	417,522.00	  	$	21.00	  	$	34,793.50
				
	 Fixed Rent during the Second Option Term shall be as follows:
	  			  			  		
				
	 January 1, 2014 – December 31, 2014:
	  	$	427,463.00	  	$	21.50	  	$	35,621.92
	 January 1, 2015 – December 31, 2015
	  	$	437,404.00	  	$	22.00	  	$	36.450.33

  

	4.	NO EARLY TERMINATION OPTION. Landlord and Tenant agree that Tenant’s rights under Paragraph Six (6) of the Fifth Amendment have fully lapsed and Tenant has no early
termination option under the Lease as of the Effective Date. 

  

	5.	SIGNAGE 

 Tenant shall continue to have the right
to signage as granted under Paragraph 7 of the Fifth Amendment for no additional charge under the Lease but otherwise subject to all terms and conditions as set forth in said Paragraph 7. As of the Effective Date Landlord hereby waives any rights to
Signage Rent (as defined under the Fifth Amendment) for the Additional Term and any Additional Option Term. 

	5.	BROKERAGE 

 Each party hereto warrants and
represents that it has dealt with no real estate broker or agent other than Lincoln Property Company in connection with this Sixth Amendment to Lease and agrees-to defend, indemnify and save the other party harmless from and against any and all
claims for commissions or fees arising out of this Sixth Amendment which, as to the respective parties, are inconsistent with such party’s warranties and representations. Landlord shall be responsible for any commissions or fees owned to the
Brokers in connection with this Sixth Amendment in accordance with separate agreements between the Brokers and Landlord. 
  

	6.	LEASE RATIFIED AND CONFIRMED 

 As modified hereby,
the Lease and all of its terms and provisions are hereby authorized, ratified and confirmed. In the event of any conflicts or inconsistencies between the terms and provisions contained in this Sixth Amendment to Lease and the Lease, the terms and
provisions of this Sixth Amendment to Lease shall control. 
 IN WITNESS WHEREOF, Landlord and Tenant have executed this Sixth Amendment
under seal as of the Effective Date. 
  

	 LANDLORD: 
	RFP LINCOLN 293, LLC 

 a Massachusetts limited
liability company 
  

	 	By:	Lincoln Route 20 (MA), a Delaware limited liability company, its Managing Member 

  

	 	By:	Lincoln Non-Member Manager, Inc., a Texas corporation, its Manager 

 /s/  Gregory S.
Courtwright                                 
 Name: Gregory S. Courtwright 
 Title: Vice President 
  

	 TENANT: 
	MERRIMACK SERVICES CORPORATION 

 By:  /s/
Jack
Ferguson                                        
 
         Name: Jack Ferguson 
         Its: Treasurer 
 Date Signed: 3/5/08 
  

 CONFIRMATION OF LEASE GUARANTY 
 The undersigned, as Guarantor of the above-referenced Lease pursuant to a Lease Guaranty dated as of August 30, 2001, hereby acknowledges and agrees
that the term “Lease” as defined in said Lease Guaranty shall mean the above-referenced Lease, as amended through and including the foregoing Sixth Amendment to Lease, and hereby consents to the foregoing Sixth Amendment to Lease and
confirms and agrees that said Lease Guaranty shall remain in full force and effect in accordance with the terms thereof with respect to the Lease, as amended through and including the foregoing Sixth Amendment to Lease. 
 EXECUTED UNDER SEAL as of the date first above written. 
 GUARANTOR: 
 PC CONNECTION, INC. 
 By:  /s/    Jack
Ferguson                                      
         (Name) Jack Ferguson 
         (Title) CFO 
 STATE OF NEW HAMPSHIRE      ) 
                                        
                    )                    
         ss. March 5, 2008 
 COUNTY OF HILLSBOROUGH    ) 
 Personally appeared, Jack Ferguson, CFO of PC Connection, Inc., who acknowledged that he executed the foregoing instrument as his free act and
deed and the free act and deed of the corporation, before me: 
 Michelle Gauthier 
 Notary Public 
  

 EXHIBIT A, SIXTH AMENDMENT TO LEASE PREMISESSummary of Compensation for Executive Officers

 Exhibit 10.58 
 Summary of Compensation for Executive Officers 
 Following is a description of the
compensation arrangements for each of PC Connection, Inc.’s (the “Company’s”) executive officers. The Company’s executive officers consist of: (i) Patricia Gallup, Chairman and Chief Executive Officer; (ii) Jack
Ferguson, Executive Vice President, Treasurer, and Chief Financial Officer; (iii) Timothy McGrath, Executive Vice President, Enterprise Group, (iv) David Beffa-Negrini, Senior Vice President, Corporate Marketing and Creative Services; and
(v) Bradley Mousseau, Senior Vice President, Human Resources. 
 The Compensation Committee annually sets the compensation of the Chief
Executive Officer. The Compensation Committee also reviews the recommendations of the Chief Executive Officer regarding the compensation of the Company’s other executive officers. The Compensation Committee seeks to achieve three broad goals in
connection with the Company’s compensation philosophy and decisions regarding compensation. First, the Company is committed to providing executive compensation designed to attract, retain, and motivate executives who contribute to the long-term
success of the Company and are capable of leading the Company in achieving its business objectives in the competitive and rapidly changing industry in which the Company operates. Second, the Company wants to reward executives for the achievement of
company-wide business objectives of the Company. By tying compensation in part to achievement, the Company believes that a performance-oriented environment is created for the Company’s executives. Finally, compensation is intended to provide
executives with an equity interest in the Company so as to link a meaningful portion of the compensation of the Company’s executives with the performance of the Company’s Common Stock. 
 Compensation for the Company’s executives generally consists of three elements: 
  

	 	•	 	 salary—levels are generally set by reviewing compensation for competitive positions in the market and considering the executive’s level of responsibility,
qualifications, and experience, as well as the Company’s financial performance and the individual’s performance; 

	 	•	 	 bonus—amounts are generally based on achievement of the Company’s performance goals in any given year; and 

	 	•	 	 equity awards—equity awards provide long-term incentives to promote and identify long-term interests between the Company’s employees and its stockholders
and to assist in the retention of executives. 

  

 The following table lists the 2007 annual salaries and bonuses of the Company’s executive officers: 
  

							
	 	  	Salary	  	Bonus
	Patricia Gallup
Chairman and Chief Executive Officer	  	$	500,000	  	$	524,000
	Timothy McGrath (1)
Executive Vice President, Enterprise Group	  	$	423,846	  	$	461,100
	Jack Ferguson (2)
Executive Vice President, Treasurer, and Chief Financial
Officer	  	$	297,885	  	$	324,900
	Bradley Mousseau
Senior Vice President, Human Resources	  	$	240,000	  	$	128,500
	David Beffa-Negrini
Senior Vice President, Corporate Marketing and Creative Services	  	$	217,692	  	$	119,300

  

	 	(1)	Mr. McGrath was appointed Executive Vice President, Enterprise Group on May 15, 2007. Prior to his appointment, Mr. McGrath had been serving as Senior Vice President,
PC Connection Enterprises. 

	 	(2)	Mr. Ferguson was appointed Executive Vice President on May 15, 2007. Prior to his appointment, Mr. Ferguson had been serving as Senior Vice President.

 The Company granted equity awards in 2007 to the Company’s executive officers, as shown below: 
  

								
	 	  	Stock
Options
(# of Shares)	  	Restricted
Stock
Awards
(# of Shares)	  	Exercise
or Base
Price of
Options
	Jack Ferguson
Executive Vice President, Treasurer, and Chief Financial Officer	  	50,000	  	25,000	  	$	13.13
	Timothy McGrath
Executive Vice President, Enterprise Group	  	140,000	  	—  	  	$	13.13

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