# EDGAR Filing Document

**Accession Number:** 0001020569
**File Stem:** 0001566391-25-000004
**Filing Date:** 2025-7
**Character Count:** 10088
**Document Hash:** 832c676bbf2104ae54e3c463332cb2b9
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001566391-25-000004.hdr.sgml**: 20250702

**ACCESSION NUMBER**: 0001566391-25-000004

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 3

**CONFORMED PERIOD OF REPORT**: 20250701

**FILED AS OF DATE**: 20250702

**DATE AS OF CHANGE**: 20250702

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Meaney William L
- **CENTRAL INDEX KEY:** 0001566391

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-13045
- **FILM NUMBER:** 251102469

**MAIL ADDRESS:**
- **STREET 1:** C/O IRON MOUNTAIN INCORPORATED
- **STREET 2:** 85 NEW HAMPSHIRE AVENUE, SUITE 150
- **CITY:** PORTSMOUTH
- **STATE:** NH
- **ZIP:** 03801
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** IRON MOUNTAIN INC
- **CENTRAL INDEX KEY:** 0001020569
- **STANDARD INDUSTRIAL CLASSIFICATION:** REAL ESTATE INVESTMENT TRUSTS [6798]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 232588479
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 85 NEW HAMPSHIRE AVENUE, SUITE 150
- **STREET 2:** PEASE INTERNATIONAL TRADEPORT
- **CITY:** PORTSMOUTH
- **STATE:** NH
- **ZIP:** 03801
- **BUSINESS PHONE:** 617-535-4781

**MAIL ADDRESS:**
- **STREET 1:** 1101 ENTERPRISE DRIVE
- **CITY:** ROYERSFORD
- **STATE:** PA
- **ZIP:** 19468

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** IRON MOUNTAIN INC/PA
- **DATE OF NAME CHANGE:** 20000201

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PIERCE LEAHY CORP
- **DATE OF NAME CHANGE:** 19960807

## Ex-24

![](poa_meaney001.jpg)

POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that I, William L. Meaney, do hereby make, constitute and appoint Michelle Altamura, Secretary of Iron Mountain Incorporated, Keely Stewart, Assistant Secretary of Iron Mountain Incorporated, Christine Zhang, Assistant Secretary of Iron Mountain Incorporated, and Luke Cummiskey, Director and Senior Counsel, each 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"), as well as any filings required under Rule 13h-1 of the Securities Exchange Act of 1934, including, without limitation, the preparation, signing and filing of Form 13H. 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 and filings required under Rule 13h-1, 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 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 27 day of February, 2025. _________________________ Name: William L. Meaney

------

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>Meaney William L<br><sub>(Last) (First) (Middle)</sub><br>C/O IRON MOUNTAIN INCORPORATED<br>85 NEW HAMPSHIRE AVENUE, SUITE 150<br><sub>(Street)</sub><br>PORTSMOUTH, NH 03801<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-07-01 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_President and CEO_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>IRON MOUNTAIN INC [ IRM ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock, par value $.01 per share | 2025-07-01 |  | M<sup>(1)</sup> |  | 69125 | A | $36.588 | 69125 | D |  |
| Common Stock, par value $.01 per share | 2025-07-01 |  | S<sup>(1)</sup> |  | 54162 | D | 100.136<sup>(2)</sup> | 14963 | D |  |
| Common Stock, par value $.01 per share | 2025-07-01 |  | S<sup>(1)</sup> |  | 12339 | D | 101.007<sup>(3)</sup> | 2624 | D |  |
| Common Stock, par value $.01 per share | 2025-07-01 |  | S<sup>(1)</sup> |  | 2624 | D | 101.852<sup>(4)</sup> | 0 | D |  |
| Common Stock, par value $.01 per share |  |  |  |  |  |  |  | 295650 | I<sup>(5)</sup> | By GRAT |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Employee Stock Option (Right to Buy) | $36.588 | 2025-07-01 |  | M<sup>(1)</sup> |  |  | 69125 | <sup>(6)</sup> | 2026-02-18 | Common Stock, par value $.01 per share | 69125 | $36.588 | 345625 | D |  |

---

### Footnotes:

(1) The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2023.

(2) The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $99.630 to $100.620, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (2).

(3) The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $100.630 to $101.620, inclusive. The Reporting Person undertakes to provide the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (3).

(4) The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $101.630 to $102.260, inclusive. The Reporting Person undertakes to provide the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (4).

(5) Balance reflects 295,650 shares transferred from the Grantor for funding of a Grantor Retained Annuity Trust on November 29, 2024. This transfer is exempt from Section 16 pursuant to Rule 16a-13.

(6) This stock option, representing a right to purchase a total of 829,506 shares, is fully vested.

**Signature:** /s/ Christine Zhang, under Power of Attorney dated February 27, 2025, from William Meaney  
**Date:** 2025-07-02

### Remarks:

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.**