Does this Form 4 indicate a net share sale or purchase by the IRM CEO?

The summarized activity indicates a net sale of 38,474 Iron Mountain shares. While Meaney acquired shares by exercising options, he sold an equal number of common shares the same day, so the net effect on his directly held common stock position for this block is a disposal.

Iron Mountain (NYSE: IRM) CEO sells 38,474 shares at $108.17

Filing Impact

(Very High)

Filing Sentiment

(Very Negative)

Form Type

Rhea-AI Filing Summary

Iron Mountain President and CEO William Meaney exercised employee stock options for 38,474 shares at $37 per share and on the same day sold 38,474 common shares at an average price of $108.17 per share under a Rule 10b5-1 trading plan adopted on March 14, 2025. Following these transactions, he continues to have indirect ownership of 82,970 shares through the Meaney 2024 Master Trust and 212,680 shares through the Meaney Master Trust #2.

Insider Trade Summary

Net Seller: 38,474 shares ($4,161,733)

Net Sell 5 txns

Insider Meaney William L

Role President and CEO

Sold 38,474 shs ($4.16M)

Type	Security	Shares	Price	Value
Exercise	Employee Stock Option (Right to Buy)	38,474	$0.00	--
Exercise	Common Stock, par value $.01 per share	38,474	$37.00	$1.42M
Sale	Common Stock, par value $.01 per share	38,474	$108.17	$4.16M
holding	Common Stock, par value $.01 per share	--	--	--
holding	Common Stock, par value $.01 per share	--	--	--

Holdings After Transaction: Employee Stock Option (Right to Buy) — 384,740 shares (Direct); Common Stock, par value $.01 per share — 38,474 shares (Direct); Common Stock, par value $.01 per share — 82,970 shares (Indirect, By Meaney 2024 Master Trust)

Footnotes (1)

The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025. This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested. Not applicable.

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 02/24/2026 - 04:06 PM

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).

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

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)
02/20/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock, par value $.01 per share	02/20/2026		M⁽¹⁾		38,474	A	$37	38,474	D
Common Stock, par value $.01 per share	02/20/2026		S⁽¹⁾		38,474	D	$108.17	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Employee Stock Option (Right to Buy)	$37	02/20/2026		M⁽¹⁾			38,474	⁽²⁾	02/16/2027	Common Stock, par value $.01 per share	38,474	⁽³⁾	384,740	D

Explanation of Responses:

1. The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025.

2. This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

3. Not applicable.

Remarks:

	/s/ Christine Zhang, under Power of Attorney dated February 27, 2025, from William Meaney	02/24/2026
	** 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.

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did IRM CEO William Meaney report on this Form 4?

William Meaney reported exercising options for 38,474 shares, then selling 38,474 Iron Mountain common shares. The sale was executed in an open-market or private transaction, converting a stock option position into cash while also updating his remaining indirect shareholdings in related trusts.

At what prices did the IRM CEO exercise options and sell shares?

The options were exercised at $37 per share, and the 38,474 Iron Mountain common shares were sold at an average price of $108.17 per share. This spread reflects the gain realized on converting the fully vested employee stock options into shares and then selling them.

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

Yes, the filing states the transaction was made under a Rule 10b5-1 trading plan adopted on March 14, 2025. Such plans pre-schedule trades, helping insiders systematically diversify holdings and manage liquidity while reducing concerns about trading on material nonpublic information.

How many Iron Mountain shares does William Meaney hold indirectly after these transactions?

After these transactions, the filing reports indirect ownership of 82,970 Iron Mountain shares through the Meaney 2024 Master Trust and 212,680 shares through the Meaney Master Trust #2. These positions reflect continuing economic exposure held via trust structures rather than directly in his own name.

What happened to the employee stock option involved in the IRM CEO’s Form 4?

The employee stock option initially covered 461,696 shares and is described as fully vested. As part of this Form 4 event, 38,474 option shares were exercised, converting that portion of the derivative position into common stock, which was then sold in the open market or a private transaction.