Iron Mountain (NYSE: IRM) EVP Mark Kidd reports 6,000-share stock sale at $85

Rhea-AI Filing Summary

Iron Mountain Incorporated (IRM) executive Mark Kidd reported a stock sale under a pre-set trading plan. On 12/01/2025, he sold 6,000 shares of Iron Mountain common stock at a price of $85 per share in an open market transaction coded as "S" (sale). After this transaction, he beneficially owned 61,081 shares, all listed as directly held. The filing notes that the sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 20, 2025, which is designed to allow pre-arranged trades under specified conditions.

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Kidd Mark

(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, GM Data Centers & ALM

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		S(1)		6,000	D	$85	61,081	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

Explanation of Responses:

1. The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 20, 2025.

Remarks:

	/s/ Christine Zhang, under Power of Attorney dated June 19, 2025, from Mark Kidd	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).
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.

FAQ

What insider transaction did IRON MOUNTAIN INC (IRM) report in this Form 4?

The Form 4 reports that executive officer Mark Kidd, EVP, GM Data Centers & ALM, sold 6,000 shares of Iron Mountain common stock on 12/01/2025.

At what price were the IRON MOUNTAIN INC (IRM) shares sold by the insider?

The reported sale of Iron Mountain common stock by the reporting person was at a price of $85 per share.

How many IRON MOUNTAIN INC (IRM) shares does the insider own after this transaction?

Following the reported sale, the filing states that the reporting person beneficially owned 61,081 shares of Iron Mountain common stock, held directly.

Was the IRON MOUNTAIN INC (IRM) insider sale made under a Rule 10b5-1 trading plan?

Yes. The explanation notes that the transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 20, 2025.

What is the role of the reporting person at IRON MOUNTAIN INC (IRM)?

The reporting person is identified as an Officer of Iron Mountain, with the title EVP, GM Data Centers & ALM.

Does this IRON MOUNTAIN INC (IRM) Form 4 include any derivative securities activity?

The Form 4 includes a table for derivative securities, but in the provided content there are no derivative transactions listed with amounts or dates.