Schedule 13G
 
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
 
SCHEDULE 13G
(Rule 13d-102)
 
INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED
PURSUANT TO RULE 13d-2(b)
 
(Amendment No.            )*
 
IRON MOUNTAIN INC.
(Name of Issuer)
 
COMMON STOCK
(Title of Class of Securities)
 
462846106
                                (CUSIP Number)                                
 
December 31, 2002
(Date of Event Which Requires Filing of this Statement)
 
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
 
x Rule 13d-1(b)
 
¨ Rule 13d-1(c)
 
¨ Rule 13d-1(d)
 
*
 
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 on 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 (“Act”) 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).

   
CUSIP No.
   
462846106
   
13G
   
Page
   
2
   
of
   
10
   
Pages
   
 
  1.

  
Name of Reporting Person
I.R.S. Identification No. of above person
 
Warren E. Buffett
    
  2.
  
Check the Appropriate Box if a Member of a Group (See Instructions)
(a)  x
(b)  ¨
    
  3.

  
SEC Use Only
 
    
  4.

  
Citizenship or Place of Organization
 
United States Citizen
    
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH




  
  5.    Sole Voting Power
 
        NONE
  6.    Shared Voting Power
 
        8,000,000
  7.    Sole Dispositive Power
 
        NONE
  8.    Shared Dispositive Power
 
        8,000,000
  9.

  
Aggregate Amount Beneficially Owned by Each Reporting Person
 
8,000,000
    
10.

  
Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)
 
Not applicable.
¨
    
11.

  
Percent of Class Represented by Amount in Row (9)
 
9.43%
    
12.

  
Type of Reporting Person (See Instructions)
 
IN, HC
    

   
CUSIP No.
   
462846106
   
13G
   
Page
   
3
   
of
   
10
   
Pages
   
 
  1.

  
Name of Reporting Person
I.R.S. Identification No. of above person
 
Berkshire Hathaway Inc.
    
  2.
  
Check the Appropriate Box if a Member of a Group (See Instructions)
(a)  x
(b)  ¨
    
  3.

  
SEC Use Only
 
    
  4.

  
Citizenship or Place of Organization
 
State of Delaware
    
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH




  
  5.    Sole Voting Power
 
        NONE
  6.    Shared Voting Power
 
        8,000,000
  7.    Sole Dispositive Power
 
        NONE
  8.    Shared Dispositive Power
 
        8,000,000
  9.

  
Aggregate Amount Beneficially Owned by Each Reporting Person
 
8,000,000
    
10.

  
Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)
 
Not applicable.
¨
    
11.

  
Percent of Class Represented by Amount in Row (9)
 
9.43%            
    
12.

  
Type of Reporting Person (See Instructions)
 
HC, CO
    

   
CUSIP No.
   
462846106
   
13G
   
Page
   
4
   
of
   
10
   
Pages
   
 
  1.

  
Name of Reporting Person
I.R.S. Identification No. of above person
 
OBH, Inc.
    
  2.
  
Check the Appropriate Box if a Member of a Group (See Instructions)
(a)  x
(b)  ¨
    
  3.

  
SEC Use Only
 
    
  4.

  
Citizenship or Place of Organization
 
State of Delaware
    
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH




  
  5.    Sole Voting Power
 
        NONE
  6.    Shared Voting Power
 
        8,000,000
  7.    Sole Dispositive Power
 
        NONE
  8.    Shared Dispositive Power
 
        8,000,000
  9.

  
Aggregate Amount Beneficially Owned by Each Reporting Person
 
8,000,000
    
10.

  
Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)
 
Not applicable.
¨
    
11.

  
Percent of Class Represented by Amount in Row (9)
 
9.43%
    
12.

  
Type of Reporting Person (See Instructions)
 
HC, CO
    

   
CUSIP No.
   
462846106
   
13G
   
Page
   
5
   
of
   
10
   
Pages
   
 
  1.

  
Name of Reporting Person
I.R.S. Identification No. of above person
 
National Indemnity Company
    
  2.
  
Check the Appropriate Box if a Member of a Group (See Instructions)
(a)  x
(b)  ¨
    
  3.

  
SEC Use Only
 
    
  4.

  
Citizenship or Place of Organization
 
State of Nebraska
    
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH




  
  5.    Sole Voting Power
 
        NONE
  6.    Shared Voting Power
 
        8,000,000
  7.    Sole Dispositive Power
 
        NONE
  8.    Shared Dispositive Power
 
        8,000,000
  9.

  
Aggregate Amount Beneficially Owned by Each Reporting Person
 
8,000,000
    
10.

  
Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)
 
Not applicable.
¨
    
11.

  
Percent of Class Represented by Amount in Row (9)
 
9.43%
    
12.

  
Type of Reporting Person (See Instructions)
 
IC, CO
    

   
CUSIP No.
   
462846106
   
13G
   
Page
   
6
   
of
   
10
   
Pages
   
 
  1.

  
Name of Reporting Person
I.R.S. Identification No. of above person
 
GEICO Corporation
    
  2.
  
Check the Appropriate Box if a Member of a Group (See Instructions)
(a)  x
(b)  ¨
    
  3.

  
SEC Use Only
 
    
  4.

  
Citizenship or Place of Organization
 
State of Delaware
    
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH




  
  5.    Sole Voting Power
 
        NONE
  6.    Shared Voting Power
 
        8,000,000
  7.    Sole Dispositive Power
 
        NONE
  8.    Shared Dispositive Power
 
        8,000,000
  9.

  
Aggregate Amount Beneficially Owned by Each Reporting Person
 
8,000,000
    
10.

  
Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)
 
Not applicable.
¨
    
11.

  
Percent of Class Represented by Amount in Row (9)
 
9.43%
    
12.

  
Type of Reporting Person (See Instructions)
 
HC, CO
    

   
CUSIP No.
   
462846106
   
13G
   
Page
   
7
   
of
   
10
   
Pages
   
 
  1.

  
Name of Reporting Person
I.R.S. Identification No. of above person
 
Government Employees Insurance Company
    
  2.
  
Check the Appropriate Box if a Member of a Group (See Instructions)
(a)  x
(b)  ¨
    
  3.

  
SEC Use Only
 
    
  4.

  
Citizenship or Place of Organization
 
State of Maryland
    
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH




  
  5.    Sole Voting Power
 
        NONE
  6.    Shared Voting Power
 
        8,000,000
  7.    Sole Dispositive Power
 
        NONE
  8.    Shared Dispositive Power
 
        8,000,000
  9.

  
Aggregate Amount Beneficially Owned by Each Reporting Person
 
8,000,000
    
10.

  
Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)
 
Not applicable.
¨
    
11.

  
Percent of Class Represented by Amount in Row (9)
 
9.43%
    
12.

  
Type of Reporting Person (See Instructions)
 
IC, CO
    

Page 8 of 10 Pages
SCHEDULE 13G
 
Item 1.
 
 
(a)
 
Name of Issuer
 
IRON MOUNTAIN INC.
 
 
(b)
 
Address of Issuer’s Principal Executive Offices
 
745 Atlantic Avenue, Boston, MA 02111
 
Item 2(a).    Name of Person Filing:
 
Item 2(b).    Address of Principal Business Office:
 
Item 2(c).    Citizenship:
 
Warren E. Buffett
1440 Kiewit Plaza
Omaha, Nebraska 68131
United States Citizen
 
Berkshire Hathaway Inc.
1440 Kiewit Plaza
Omaha, Nebraska 68131
Delaware corporation
 
OBH, Inc.
1440 Kiewit Plaza
Omaha, Nebraska 68131
Delaware corporation
 
National Indemnity Company
3024 Harney Street
Omaha, Nebraska 68131
Nebraska corporation
 
GEICO Corporation
1 Geico Plaza
Washington, D.C. 20076
Delaware corporation
 
Government Employees Insurance Company
1 Geico Plaza
Washington, D.C. 20076
Maryland corporation
 
 
(d)
 
Title of Class of Securities
 
Common Stock
 
 
(e)
 
CUSIP Number
 
462846106
 
Item 3.    If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b) or (c), check whether the person filing is a:
 
Warren E. Buffett (an individual who may be deemed to control Berkshire Hathaway Inc.), Berkshire Hathaway Inc., OBH, Inc., and GEICO Corporation are each a Parent Holding Company or Control Person, in accordance with Rule 13d-1(b)(1)(ii)(G) (Note: See Item 7).
 
National Indemnity Company and Government Employees Insurance Company are each an Insurance Company as defined in section 3(a)(19) of the Act.
 
The Reporting Persons together are a Group in accordance with Rule 13d-1(b)(1)(ii)(J).
 
Item 4.    Ownership
 
If the percent of the class owned, as of December 31 of the year covered by the statement, or as of the last day of any month described in Rule 13d-1(b)(2), if applicable, exceeds five percent, provide the following information as of that date and identify those shares which there is a right to acquire.
 
 
(a)
 
Amount beneficially Owned
 
See the Cover Pages for each of the Reporting Persons.

 
Page 9 of 10 Pages
 
 
(b)
 
Percent of Class
 
See the Cover Pages for each of the Reporting Persons.
 
 
(c)
 
Number of shares as to which such person has:
 
 
(i)
 
sole power to vote or to direct the vote
 
 
(ii)
 
shared power to vote or to direct the vote
 
 
(iii)
 
sole power to dispose or to direct the disposition of
 
 
(iv)
 
shared power to dispose or to direct the disposition of
 
 
See
 
the Cover Pages for each of the Reporting Persons.
 
Item 5.    Ownership of Five Percent or Less of a Class.
 
Not Applicable.
 
Item 6.    Ownership of More than Five Percent on Behalf of Another Person.
 
Not Applicable.
 
Item 7.
   
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person.
 
See Exhibit A.
 
Item 8.    Identification and Classification of Members of the Group.
 
See Exhibit A.
 
Item 9.    Notice of Dissolution of Group.
 
Not Applicable.
 
Item 10.    Certification.
 
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

Page 10 of 10 Pages
 
SIGNATURES
 
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.
 
Dated:
   
February 14, 2003
      
/s/    WARREN E. BUFFETT        
            
Warren E. Buffett
                   
       
BERKSHIRE HATHAWAY INC.
Dated:
   
February 14, 2003
      
/s/    WARREN E. BUFFETT        
            
By:
   
Warren E. Buffett
            
Title:
   
Chairman of the Board
                   
       
OBH, INC.
Dated:
   
February 14, 2003
      
/s/    WARREN E. BUFFETT        
            
By:
   
Warren E. Buffett
            
Title:
   
Chairman of the Board
                   
       
NATIONAL INDEMNITY COMPANY
Dated:
   
February 14, 2003
      
/s/    WARREN E. BUFFETT        
            
By:
   
Warren E. Buffett
            
Title:
   
Chairman of the Board
                   
       
GEICO CORPORATION
Dated:
   
February 14, 2003
      
/s/    WARREN E. BUFFETT        
            
By:
   
Warren E. Buffett
            
Title:
   
Chairman of the Board
                   
       
GOVERNMENT EMPLOYEES INSURANCE COMPANY
Dated:
   
February 14, 2003
      
/s/    WARREN E. BUFFETT        
            
By:
   
Warren E. Buffett
            
Title:
   
Chairman of the Board

 
SCHEDULE 13G
 
EXHIBIT A
 
RELEVANT SUBSIDIARIES AND MEMBERS OF FILING GROUP
 
PARENT HOLDING COMPANIES OR CONTROL PERSONS:
 
Warren E. Buffett (an individual who may be deemed to control Berkshire Hathaway Inc.)
 
Berkshire Hathaway Inc.
 
OBH, Inc.
 
GEICO Corporation
 
INSURANCE COMPANIES AS DEFINED IN SECTION 3(a)(19) OF THE ACT:
 
National Indemnity Company
 
Government Employees Insurance Company

 
SCHEDULE 13G
 
EXHIBIT B
 
JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)(1)
 
The undersigned persons agree and consent to the joint filing on their behalf of this Schedule 13G in connection with their beneficial ownership of the Common Stock of Iron Mountain Inc.
 
Dated:
   
February 14, 2003
      
/s/    WARREN E. BUFFETT        
            
Warren E. Buffett
                   
       
BERKSHIRE HATHAWAY INC.
Dated:
   
February 14, 2003
      
/s/    WARREN E. BUFFETT        
            
By:
   
Warren E. Buffett
            
Title:
   
Chairman of the Board
                   
       
OBH, INC.
Dated:
   
February 14, 2003
      
/s/    WARREN E. BUFFETT        
            
By:
   
Warren E. Buffett
            
Title:
   
Chairman of the Board
                   
       
NATIONAL INDEMNITY COMPANY
Dated:
   
February 14, 2003
      
/s/    WARREN E. BUFFETT        
            
By:
   
Warren E. Buffett
            
Title:
   
Chairman of the Board
                   
       
GEICO CORPORATION
Dated:
   
February 14, 2003
      
/s/    WARREN E. BUFFETT        
            
By:
   
Warren E. Buffett
            
Title:
   
Chairman of the Board
                   
       
GOVERNMENT EMPLOYEES INSURANCE COMPANY
Dated:
   
February 14, 2003
      
/s/    WARREN E. BUFFETT        
            
By:
   
Warren E. Buffett
            
Title:
   
Chairman of the Board