Iron Mountain (IRM) CEO Meaney exercises 69,125 options and sells shares

Rhea-AI Filing Summary

Iron Mountain Incorporated President and CEO, and director, William Meaney reported an option exercise and share sales in company stock. On 12/01/2025, he exercised an employee stock option to acquire 69,125 shares of common stock at an exercise price of $36.588 per share. That same day, he sold 58,556 shares at a weighted average price of $83.229 per share and an additional 10,569 shares at a weighted average price of $83.934 per share under a pre-arranged Rule 10b5-1 trading plan adopted on August 18, 2023. After these transactions, he reported 0 shares held directly, and indirect holdings of 82,970 shares through the Meaney 2024 Master Trust and 212,680 shares through Meaney Master Trust #2. The exercised option, initially covering 829,506 shares, is fully vested and now shows 0 derivative securities remaining.

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

OMB APPROVAL

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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^*

Meaney William L

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

3. Date of Earliest Transaction (Month/Day/Year)
12/01/2025

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	12/01/2025		M(1)		69,125	A	$36.588	69,125	D
Common Stock, par value $.01 per share	12/01/2025		S(1)		58,556	D	$83.229(2)	10,569	D
Common Stock, par value $.01 per share	12/01/2025		S(1)		10,569	D	$83.934(3)	0	D
Common Stock, par value $.01 per share								82,970	I	By Meaney 2024 Master Trust
Common Stock, par value $.01 per share								212,680	I	By Meaney Master Trust #2

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
Employee Stock Option (Right to Buy)	$36.588	12/01/2025		M(1)			69,125	(4)	02/18/2026	Common Stock, par value $.01 per share	69,125	(5)	0	D

Explanation of Responses:

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 $82.730 to $83.720, 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 $83.730 to $84.570, 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. This stock option, initially representing a right to purchase a total of 829,506 shares, is fully vested.

5. Not applicable.

Remarks:

	/s/ Christine Zhang, under Power of Attorney dated February 27, 2025, from William Meaney	12/03/2025
	** 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).
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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.

FAQ

What insider transaction did IRM CEO William Meaney report on December 1, 2025?

On 12/01/2025, Iron Mountain CEO William Meaney exercised an employee stock option for 69,125 shares at $36.588 per share and sold those shares in the open market.

How many Iron Mountain (IRM) shares did the CEO sell and at what prices?

He sold 58,556 shares at a weighted average price of $83.229 per share and 10,569 shares at a weighted average price of $83.934 per share, in multiple transactions within the reported price ranges.

Was the IRM CEO’s stock sale done under a Rule 10b5-1 trading plan?

Yes. The filing states the transactions were made under a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2023.

How many Iron Mountain shares does the CEO hold after these transactions?

Following the reported transactions, he holds 0 shares directly, and indirectly holds 82,970 shares via the Meaney 2024 Master Trust and 212,680 shares via Meaney Master Trust #2.

What is the status of the Iron Mountain stock option reported in this Form 4?

The employee stock option, initially covering 829,506 shares of common stock, is reported as fully vested, with 0 derivative securities remaining after the exercise of 69,125 options on 12/01/2025.

What roles does the reporting person hold at Iron Mountain (IRM)?

The reporting person is listed as a Director and as an Officer, with the title President and CEO of Iron Mountain Incorporated.