IRM exec exercises 7,306 options at $31.46, sells same-day

Rhea-AI Filing Summary

Iron Mountain (IRM) Form 4: EVP, GM Data Centers & ALM Mark Kidd exercised employee stock options and sold shares on 10/31/2025 under a Rule 10b5-1 plan. He exercised 7,306 options at $31.46 per share (code M) and sold 7,306 common shares at an average price of $100.82 (code S). Following these transactions, he directly owns 73,081 common shares. The reported option covered 7,306 underlying shares, was fully vested, carried a $31.46 exercise price, and shows 0 remaining after the exercise; its expiration date is 03/09/2026.

Insights

Insider transactions analyst

Routine 10b5-1 option exercise and same-day sale; neutral impact.

The officer exercised $31.46 employee stock options for 7,306 shares and sold the same number at $100.82 on 10/31/2025, as reflected by Form 4 codes M and S. The filing states the trade was pursuant to a Rule 10b5-1 plan adopted on March 20, 2025.

Post-transaction direct ownership stands at 73,081 common shares. The option was fully vested, covered 7,306 underlying shares, had an expiration of 03/09/2026, and shows 0 remaining after exercise. This is an administrative disclosure without stated strategic implications.

Insider Trade Summary

Net Seller: 7,306 shares ($736,591)

Net Sell 3 txns

Insider Kidd Mark

Role EVP, GM Data Centers & ALM

Sold 7,306 shs ($737K)

Type	Security	Shares	Price	Value
Exercise	Employee Stock Option (Right to Buy)	7,306	$31.46	$230K
Exercise	Common Stock, par value $.01 per share	7,306	$31.46	$230K
Sale	Common Stock, par value $.01 per share	7,306	$100.82	$737K

Holdings After Transaction: Employee Stock Option (Right to Buy) — 0 shares (Direct); Common Stock, par value $.01 per share — 80,387 shares (Direct)

Footnotes (1)

1. The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 20, 2025. This stock option, representing a right to purchase a total of 7,306 shares, is fully vested.

Form 4 Insider Transactions: What Each Field Means →

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)
10/31/2025

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	10/31/2025		M(1)		7,306	A	$31.46	80,387	D
Common Stock, par value $.01 per share	10/31/2025		S(1)		7,306	D	$100.82	73,081	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
Employee Stock Option (Right to Buy)	$31.46	10/31/2025		M(1)			7,306	(2)	03/09/2026	Common Stock, par value $.01 per share	7,306	$31.46	0	D

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.

2. This stock option, representing a right to purchase a total of 7,306 shares, is fully vested.

Remarks:

	/s/ Christine Zhang, under Power of Attorney dated June 19, 2025, from Mark Kidd	11/03/2025
	** 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 did IRM executive Mark Kidd report on Form 4?

He exercised 7,306 options at $31.46 and sold 7,306 shares at $100.82 on 10/31/2025 under a Rule 10b5-1 plan.

How many IRM shares does Mark Kidd own after the transaction?

He directly owns 73,081 common shares after the reported transactions.

What were the Form 4 transaction codes for IRM?

Code M for the option exercise at $31.46 and code S for the sale at $100.82.

Was the IRM trade made under a Rule 10b5-1 plan?

Yes. The filing notes a Rule 10b5-1 plan adopted on March 20, 2025.

What is the status and expiration of the exercised IRM option?

It was fully vested, covered 7,306 shares at $31.46, and expires on 03/09/2026; 0 remain after exercise.