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    SEC Form SC 13G/A filed by Iron Mountain Incorporated (Delaware) (Amendment)

    2/11/22 2:48:42 PM ET
    $IRM
    Real Estate Investment Trusts
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    SC 13G/A 1 SEC13G_Filing.htm SEC SCHEDULE 13G

    UNITED STATES
    SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549

    SCHEDULE 13G

    Under the Securities Exchange Act of 1934

    (Amendment No. 10 )*

                

    Iron Mountain Inc.


    (Name of Issuer)

    Common Stock


    (Title of Class of Securities)

    46284V101


    (CUSIP Number)

    December 31, 2021


    (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 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 (the "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. 46284V101

    1. NAMES OF REPORTING PERSONS
    I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

    Capital World Investors
    95-1411037
    2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

    (a) [ ]
    (b) [ ]
    3. SEC USE ONLY
    4. CITIZENSHIP OR PLACE OF ORGANIZATION

    Delaware

    NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH

    5. SOLE VOTING POWER 32,713,760
    6. SHARED VOTING POWER 0
    7. SOLE DISPOSITIVE POWER 32,713,760
    8. SHARED DISPOSITIVE POWER 0
    9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    32,713,760 Beneficial ownership disclaimed pursuant to Rule 13d-4
    10. CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

    [ ]
    11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

    11.3%
    12. TYPE OF REPORTING PERSON

    IA

    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    


    Item 1.
    (a) Name of Issuer
    Iron Mountain Inc.
    (b) Address of Issuer's Principal Executive Offices
    One Federal Street, Boston, MA 02110
    Item 2.
    (a) Name of Person Filing
    Capital World Investors
    (b) Address of Principal Business Office or, if None, Residence
    333 SOUTH HOPE STREET, 55TH FLOOR, LOS ANGELES, CALIFORNIA 90071
    (c) Citizenship
    N/A
    (d) Title of Class of Securities
    Common Stock
    (e) CUSIP Number
    46284V101
    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:
    (a) [ ] Broker or dealer registered under Section 15 of the Act (15 U.S.C. 78o).
    (b) [ ] Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c).
    (c) [ ] Insurance Company as defined in Section 3(a)(19) of the Act (15 U.S.C. 78c).
    (d) [ ] Investment Company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).
    (e) [X] An investment adviser in accordance with Rule 240.13d-1(b)(1)(ii)(E);
    (f) [ ] An employee benefit plan or endowment fund in accordance with Rule 240.13d-1(b)(1)(ii)(F);
    (g) [ ] A parent holding company or control person in accordance with Rule 240.13d-1(b)(1)(ii)(G);
    (h) [ ] A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
    (i) [ ] A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
    (j) [ ] Group, in accordance with Rule 240.13d-1(b)(1)(ii)(J).
    Item 4. Ownership.
    Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.
    (a) Amount Beneficially Owned:
    32,713,760 **
    (b) Percent of Class:
    11.3%
    (c) Number of shares as to which such person has:
    (i) sole power to vote or to direct the vote 32,713,760
    (ii) shared power to vote or to direct the vote 0
    (iii) sole power to dispose or to direct the disposition of 32,713,760
    (iv) shared power to dispose or to direct the disposition of 0
    **Capital World Investors ("CWI") is a division of Capital Research and Management Company ("CRMC"), as well as its investment management subsidiaries and affiliates Capital Bank and Trust Company, Capital International, Inc., Capital International Limited, Capital International Sarl, Capital International K.K., and Capital Group Private Client Services, Inc. (together with CRMC, the "investment management entities"). CWI's divisions of each of the investment management entities collectively provide investment management services under the name "Capital World Investors." CWI is deemed to be the beneficial owner of 32,713,760 shares or 11.3% of the 289,549,498 shares believed to be outstanding.
    Item 5. Ownership of Five Percent or Less of Class.
    If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following: [ ]
    Item 6. Ownership of More than Five Percent on Behalf of Another Person.
    American Balanced Fund
    Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company.
    Not Applicable
    Item 8. Identification and Classification of Members of the Group.

    Not Applicable. This schedule is not being filed pursuant to Rule 13d-1(b)(1)(ii)(J) or Rule 13d-1(d).
    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.


    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.

    Capital World Investors
    By: /s/ Erik A. Vayntrub
    Date: February 14, 2022
    Name: Erik A. Vayntrub
    Title: Senior Vice President and Senior Counsel, Fund Business Management Group, Capital Research and Management Company

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