Iron Mountain director granted 1,892 RSUs

RAKOWICH WALTER C reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

RAKOWICH WALTER C reported acquisition or exercise transactions in this Form 4 filing.

IRON MOUNTAIN INC director Walter C. Rakowich reported an equity award and updated holdings. On May 7, 2026, he received 1,892 shares of common stock through restricted stock units that vested in full on the grant date, recorded as a compensation-related grant with no cash price per share.

After this award, he directly holds 1,892 common shares and indirectly holds 23,865 shares through the Rakowich Living Trust, where he is the sole trustee. The filing shows no open-market purchases or sales, only this grant and the trust holding entry.

Insider Trade Summary

Grant/Award: 1,892 shares

Grant/Award 2 txns

Insider RAKOWICH WALTER C

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, par value $.01 per share	1,892	$0.00	$0.00
holding	Common Stock, par value $.01 per share	--	--	--

Holdings After Transaction: Common Stock, par value $.01 per share — 1,892 shares (Direct); Common Stock, par value $.01 per share — 23,865 shares (Indirect, By Rakowich Living Trust)

Footnotes (2)

1. F1. Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 7, 2026. The RSUs vest in their entirety on the grant date.
2. F2. Shares held of record by Rakowich Living Trust. The reporting person is the sole trustee.

Key Figures

RSUs granted: 1,892 shares Grant price per share: $0.0000 per share Direct holdings after grant: 1,892 shares +1 more

4 metrics

RSUs granted 1,892 shares Restricted stock units granted and fully vested on May 7, 2026

Grant price per share $0.0000 per share Stated transaction price for the 1,892-share RSU grant

Direct holdings after grant 1,892 shares Common stock directly owned by Walter C. Rakowich after the transaction

Indirect trust holdings 23,865 shares Common stock held by Rakowich Living Trust, with Rakowich as sole trustee

Key Terms

restricted stock units ("RSUs"), Grant, award, or other acquisition, Rakowich Living Trust

3 terms

restricted stock units ("RSUs") financial

"Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 7, 2026."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

Grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

Rakowich Living Trust financial

"Shares held of record by Rakowich Living Trust. The reporting person is the sole trustee."

FAQ

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

What insider transaction did IRON MOUNTAIN INC (IRM) director Walter C. Rakowich report?

Walter C. Rakowich reported receiving an equity grant of 1,892 common shares. These shares came from restricted stock units that vested in full on May 7, 2026, reflecting compensation rather than an open-market stock purchase or sale.

How many Iron Mountain (IRM) shares did Walter C. Rakowich receive in this Form 4 filing?

He received 1,892 shares of Iron Mountain common stock. The shares were issued at a stated price of $0.0000 per share through restricted stock units, which vested entirely on the May 7, 2026 grant date, indicating a standard director compensation award.

What are Walter C. Rakowich’s direct and indirect IRM holdings after this transaction?

After the transaction, he directly holds 1,892 Iron Mountain shares. He also indirectly holds 23,865 shares through the Rakowich Living Trust, where he serves as sole trustee, according to the ownership footnote included in the Form 4 filing.

Does the Iron Mountain (IRM) Form 4 show any insider stock sales or purchases?

The Form 4 does not show any open-market stock sales or purchases. It reports a grant of 1,892 restricted stock units that vested immediately and a holding entry for 23,865 shares in the Rakowich Living Trust, both without market trading activity.

What is the role of the Rakowich Living Trust in Walter C. Rakowich’s IRM ownership?

The Rakowich Living Trust holds 23,865 Iron Mountain shares of record. The filing states that Walter C. Rakowich is the sole trustee of this trust, meaning these shares are reported as indirect ownership associated with his position and control over the trust.

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

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Accepted by SEC EDGAR 05/11/2026 - 05:11 PM EDT 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).

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^*

RAKOWICH WALTER C

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/07/2026

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	05/07/2026		A		1,892(1)	A	$0	1,892	D
Common Stock, par value $.01 per share								23,865	I	By Rakowich Living 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

Explanation of Responses:

1. Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 7, 2026. The RSUs vest in their entirety on the grant date.

2. Shares held of record by Rakowich Living Trust. The reporting person is the sole trustee.

Remarks:

	/s/ Keely Stewart, under Power of Attorney dated April 17, 2023, from Walter C. Rakowich	05/11/2026
	** 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)