SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
 Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Tomovcsik John
(Last) (First) (Middle)
C/O IRON MOUNTAIN INCORPORATED
85 NEW HAMPSHIRE AVENUE, SUITE 150
(Street)
PORTSMOUTH NH 03801
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
IRON MOUNTAIN INC [ IRM ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
EVP, Chief Operating Officer
3. Date of Earliest Transaction (Month/Day/Year)
03/01/2024
4. If Amendment, Date of Original Filed (Month/Day/Year)
 6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock, par value $.01 per share 03/01/2024 M 40,001(1) A $0 60,456 D
Common Stock, par value $.01 per share 03/01/2024 F 15,181 D $81.03 45,275 D
Common Stock, par value $.01 per share 03/01/2024 M 9,550(2) A $0 54,825 D
Common Stock, par value $.01 per share 03/01/2024 F 4,057 D $81.03 50,768 D
Common Stock, par value $.01 per share 03/01/2024 M 3,104(3) A $0 53,872 D
Common Stock, par value $.01 per share 03/01/2024 F 1,245 D $81.03 52,627 D
Common Stock, par value $.01 per share 03/01/2024 M 4,104(4) A $0 56,731 D
Common Stock, par value $.01 per share 03/01/2024 F 1,647 D $81.03 55,084 D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Performance Units (5) 03/01/2024 M 40,001 03/01/2024(6) (6) Common Stock 40,001 $0 0 D
Restricted Stock Units (7) 03/01/2024 M 9,550 (8) (8) Common Stock 9,550 $0 0 D
Restricted Stock Units (7) 03/01/2024 M 3,104 (9) (9) Common Stock 3,104 $0 3,104 D
Restricted Stock Units (7) 03/01/2024 M 4,104 (10) (10) Common Stock 4,104 $0 8,210 D
Restricted Stock Units (7) 03/01/2024 A 7,990 (11) (11) Common Stock 7,990 $0 7,990 D
Explanation of Responses:
1. This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on March 1, 2021. Effective February 22, 2024, the Compensation Committee of Iron Mountain Incorporated's Board of Directors (the "Compensation Committee") determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2024.
2. This acquisition is reported to reflect the full vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2021.
3. This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2022.
4. This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2023.
5. Each PU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").
6. The PUs were initially granted to the Reporting Person on March 1, 2021. Effective February 22, 2024, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2024.
7. Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").
8. The RSUs, representing a contingent right to receive a total of 28,649 shares of Common Stock, were granted to the Reporting Person on March 1, 2021 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.
9. The RSUs, representing a contingent right to receive a total of 9,311 shares of Common Stock, were granted to the Reporting Person on March 1, 2022 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.
10. The RSUs, representing a contingent right to receive a total of 12,314 shares of Common Stock, were granted to the Reporting Person on March 1, 2023 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.
11. The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.
Remarks:
/s/ Keely Stewart, under Power of Attorney dated April 17, 2023, from John Tomovcsik 03/05/2024
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that I, John Tomovcsik, do hereby make, constitute and appoint, Deborah Marson, Secretary of Iron Mountain Incorporated, Keely Stewart, Assistant Secretary of Iron Mountain Incorporated and Luke Cummiskey, Manager, Senior Corporate Counsel, acting singly, to be my lawful attorney-in-fact for me and to do any and all acts which I could do in connection with any filings required by Section 16 of the Securities Exchange Act of 1934, including, without limitation, the preparation, signing and filing of Forms 3, 4 and 5 (“Section 16 Filings”). Among the powers granted to my attorney-in-fact are: To prepare, sign and file with the Securities and Exchange Commission and the New York Stock Exchange the Section 16 Filings, in my name or stead, and any and all such further documents as he/she may deem necessary or advisable in order to carry out the required Section 16 Filings and the powers granted to him/her by these presents. This Power of Attorney shall remain in effect until revoked by the undersigned in writing. IN WITNESS WHEREOF, I have hereunto set my hand and seal this 17 day of April, 2023. _____________________________ Name: John Tomovcsik DocuSign Envelope ID: 2141533B-7182-492E-9F19-DFFFD050A9C8

 
POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that I, John Tomovcsik, do hereby make, constitute and appoint, Deborah Marson, Secretary of Iron Mountain Incorporated, Keely Stewart, Assistant Secretary of Iron Mountain Incorporated and Luke Cummiskey, Manager, Senior Corporate Counsel, acting singly, to be my lawful attorney-in-fact for me and to do any and all acts which I could do in connection with any filings required by Section 16 of the Securities Exchange Act of 1934, including, without limitation, the preparation, signing and filing of Forms 3, 4 and 5 (“Section 16 Filings”). Among the powers granted to my attorney-in-fact are: To prepare, sign and file with the Securities and Exchange Commission and the New York Stock Exchange the Section 16 Filings, in my name or stead, and any and all such further documents as he/she may deem necessary or advisable in order to carry out the required Section 16 Filings and the powers granted to him/her by these presents. This Power of Attorney shall remain in effect until revoked by the undersigned in writing. IN WITNESS WHEREOF, I have hereunto set my hand and seal this 17 day of April, 2023. _____________________________ Name: John Tomovcsik DocuSign Envelope ID: 2141533B-7182-492E-9F19-DFFFD050A9C8

 
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