Iron Mountain Greg W. McIntosh sells 5,000 shares

Iron Mountain's chief commercial officer held 70,634 shares directly after the reported plan-based sale.

Rhea-AI Filing Summary

Iron Mountain Inc. EVP, Chief Commercial Officer Greg W. McIntosh sold 5,000 shares of common stock on October 1, 2026, at $110.72 per share. The sale was made pursuant to a Rule 10b5-1 trading plan adopted May 8, 2026. He directly held 70,634 shares after the transaction.

Insider Trade Summary 10b5-1

Net Seller: 5,000 shares

Net Sell 1 txn

Insider McIntosh Greg W

Role EVP, Chief Commercial Officer

Sold 5,000 shs ($554K)

Type	Security	Shares	Price	Value
Sale	Common Stock, par value $.01 per share F1	5,000	$110.72	$554K

Holdings After Transaction: Common Stock, par value $.01 per share — 70,634 shares (Direct)

Footnotes (1)

1. F1. The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 8, 2026.

Key Figures

Shares sold: 5,000 shares Sale price: $110.72 per share Shares held after transaction: 70,634 shares

3 metrics

Shares sold 5,000 shares Sale on October 1, 2026

Sale price $110.72 per share Sale on October 1, 2026

Shares held after transaction 70,634 shares Direct holdings after the October 1, 2026 transaction

Key Terms

Rule 10b5-1 trading plan, par value, non-derivative

3 terms

Rule 10b5-1 trading plan financial

"pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

par value financial

"Common Stock, par value $.01 per share"

Par value is the fixed amount printed on a bond or stock that represents its original value when issued. It’s like the face value of a coin or bill—what the issuer promises to pay back or the starting price of a stock—though it often doesn’t change with market prices. It matters because it helps determine certain financial details, like how much the company will pay back at maturity.

non-derivative financial

"non-derivative transaction"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many IRM shares did the chief commercial officer sell, and at what price?

Greg W. McIntosh, Iron Mountain Inc.'s EVP, Chief Commercial Officer, sold 5,000 shares at $110.72 per share on October 1, 2026. The sale was made pursuant to a Rule 10b5-1 trading plan adopted May 8, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/05/2026 - 04:06 PM Accepted by SEC EDGAR 10/05/2026 - 04:06 PM Learn about SEC filing dates

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^*

McIntosh Greg W

(Last) (First) (Middle)

C/O IRON MOUNTAIN INCORPORATED

85 NEW HAMPSHIRE AVENUE, SUITE 150

(Street)

PORTSMOUTH NEW HAMPSHIRE 03801

(City) (State) (Zip)

UNITED STATES

(Country)

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 Commercial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	10/01/2026		S(1)		5,000	D	$110.72	70,634	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 May 8, 2026.

Remarks:

	/s/ Christine Zhang, under Power of Attorney dated June 19, 2025, from Greg McIntosh	10/05/2026
	** 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.
* Form 4: SEC 1474 (03-26)