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SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

SCHEDULE 13D

(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
§240.13d-2(a)
(Amendment No. 6 )*

Argyle Security, Inc.
(Name of Issuer)
Common Stock, par value $0.0001
(Title of Class of Securities)
040311102
(CUSIP Number)
Mezzanine Management Limited
Century House
16 Par la Ville Road
Hamilton, Bermuda
Attention: Arthur Morris
(441) 296-8099
(Name, Address and Telephone Number of Person Authorized to
Receive Notices and Communications)
June 15, 2009
(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box: o

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

 
 

Table of Contents

                       
CUSIP No.
  
040311102 
 13D  Page  
2 
   of   
6  
   Pages

 

           
1.   NAMES OF REPORTING PERSONS

Mezzanine Management Fund IV A, L.P.
     
     
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
  (a)   þ 
  (b)   o 
     
3.   SEC USE ONLY
   
   
     
4.   SOURCE OF FUNDS (SEE INSTRUCTIONS)
   
  OO
     
5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
   
  o
     
6.   CITIZENSHIP OR PLACE OF ORGANIZATION
   
  United Kingdom
       
  7.   SOLE VOTING POWER
     
NUMBER OF   0
       
SHARES 8.   SHARED VOTING POWER
BENEFICIALLY    
OWNED BY   5,300,100
       
EACH 9.   SOLE DISPOSITIVE POWER
REPORTING    
PERSON   0
       
WITH 10.   SHARED DISPOSITIVE POWER
     
    5,300,100
     
11.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   
  5,300,100 shares of common stock
     
12.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
   
  o
     
13.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
   
  49.1%
     
14.   TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
   
  PN

Table of Contents

                       
CUSIP No.
  
893522 20 1 
 13D  Page  
3 
   of   
6  
   Pages

 

           
1.   NAMES OF REPORTING PERSONS

Mezzanine Management Fund IV Coinvest A, L.P.
     
     
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
  (a)   þ 
  (b)   o 
     
3.   SEC USE ONLY
   
   
     
4.   SOURCE OF FUNDS (SEE INSTRUCTIONS)
   
  OO
     
5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
   
  o
     
6.   CITIZENSHIP OR PLACE OF ORGANIZATION
   
  United Kingdom
       
  7.   SOLE VOTING POWER
     
NUMBER OF   0
       
SHARES 8.   SHARED VOTING POWER
BENEFICIALLY    
OWNED BY   69,700
       
EACH 9.   SOLE DISPOSITIVE POWER
REPORTING    
PERSON   0
       
WITH 10.   SHARED DISPOSITIVE POWER
     
    69,700
     
11.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   
  69,700 shares of common stock
     
12.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
   
  o
     
13.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
   
  1.1%
     
14.   TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
   
  PN

Table of Contents

                       
CUSIP No.
  
893522 20 1 
 13D  Page  
4 
   of   
6  
   Pages

 

           
1.   NAMES OF REPORTING PERSONS

Mezzanine Management Limited
     
     
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
  (a)   þ 
  (b)   o 
     
3.   SEC USE ONLY
   
   
     
4.   SOURCE OF FUNDS (SEE INSTRUCTIONS)
   
  OO
     
5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
   
  o
     
6.   CITIZENSHIP OR PLACE OF ORGANIZATION
   
  Bermuda
       
  7.   SOLE VOTING POWER
     
NUMBER OF   0
       
SHARES 8.   SHARED VOTING POWER
BENEFICIALLY    
OWNED BY   5,369,800
       
EACH 9.   SOLE DISPOSITIVE POWER
REPORTING    
PERSON   0
       
WITH 10.   SHARED DISPOSITIVE POWER
     
    5,369,800
     
11.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   
  5,369,800 shares of common stock
     
12.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
   
  o
     
13.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
   
  49.4%
     
14.   TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
   
  PN

TABLE OF CONTENTS

Item 4. Purpose of the Transaction.
Item 7. Material to be Filed as Exhibits.
SIGNATURE
EX-99.A

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CUSIP No.
  
893522 20 1 
 13D  Page  
5 
   of   
6  
   Pages
Amendment No. 6 to Schedule 13D
This Amendment No. 6 to Schedule 13D (this “Sixth Amendment”) amends and supplements the Schedule 13D originally filed on May 5, 2008, as amended by Amendment No. 1 filed on January 15, 2009, Amendment No. 2 filed on May 20, 2009, Amendment No. 3 filed on June 2, 2009, Amendment No. 4 filed on June 5, 2009 and Amendment No. 5 filed on June 11, 2009 (together, the “Schedule 13D”), and relates to the common stock, par value $0.0001 (the “Common Stock”), of Argyle Security, Inc., a Delaware corporation (the “Issuer”). This Fifth Amendment is being filed by and on behalf of Mezzanine Management Fund IV A, L.P., a limited partnership organized under the laws of the United Kingdom (“Fund IV”), Mezzanine Management Fund IV Coinvest A, L.P., a limited partnership organized under the laws of the United Kingdom (“Fund IV Coinvest”), and Mezzanine Management Limited, a limited partnership organized under the laws of Bermuda (“Mezzanine”). Fund IV, Fund IV Coinvest, and Mezzanine are collectively referred to herein as the “Reporting Persons.”
Item 4. Purpose of the Transaction.
Paragraphs (a), (b), (d), (e), (f), (h), (i) and (j) of Item 4 of the Schedule 13D are hereby amended and supplemented, with effect from the date of this Sixth Amendment, as follows:
On June 15, 2009, MML Capital Partners LLC, a Delaware limited liability company and an advisor to the Reporting Persons (“MML”), executed a letter of intent on behalf of the Reporting Persons to acquire all of the outstanding shares of Common Stock and units of the Issuer for $2.00 per share or unit, as applicable, through a merger transaction (the “Offer”), subject to the terms and conditions set forth in such letter (the “Offer Letter”). The Offer Letter includes an exclusivity period for MML expiring on the earlier of the execution of a definitive agreement or 45 days after June 15 in which to complete its confirmatory due diligence and execute definitive documentation with the Issuer. In addition, during this Period, MML will be subject to a standstill provision whereby they will be prohibited from trading in the Issuer’s securities or otherwise engaging in any activity that would enable them to control the Issuer. A copy of the Offer Letter is attached hereto as Exhibit B.
Item 7. Material to be Filed as Exhibits.
Item 7 of the Schedule 13D is hereby amended and supplemented, with effect from the date of this Sixth Amendment, as follows:
Exhibit A — Joint Filing Agreement for the Sixth Amendment.
Exhibit F — Letter of Intent between MML and the Issuer dated June 15, 2009 (incorporated by reference to Exhibit 99.1 to the Issuer’s Current Report on Form 8-K filed on June 15, 2009).

 

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CUSIP No.
  
893522 20 1 
 13D  Page  
6 
   of   
6  
   Pages
SIGNATURE
     After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Date: June 16, 2009
         
  MEZZANINE MANAGEMENT FUND IV A, L.P.
 		  
  By:   /s/ Christopher C. Morris    
    Name:   Christopher C. Morris   
    Title:   Authorized Signatory   
 
  MEZZANINE MANAGEMENT FUND IV COINVEST A, L.P.
 		  
  By:   /s/ Christopher C. Morris    
    Name:   Christopher C. Morris   
    Title:   Authorized Signatory   
 
  MEZZANINE MANAGEMENT LIMITED
 		  
  By:   /s/ Christopher C. Morris    
    Name:   Christopher C. Morris   
    Title:   Authorized Signatory