Iron Mountain CFO granted 166,412 performance units

Hytinen Barry reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Hytinen Barry reported acquisition or exercise transactions in this Form 4 filing.

Iron Mountain Incorporated’s EVP and CFO Barry Hytinen reported an equity compensation award of 166,412 Performance Units, each representing a contingent right to one share of common stock. The award reflects the Compensation Committee’s determination of his actual PUs earned and will fully vest on March 1, 2026.

Insider Trade Summary

Grant/Award: 166,412 shares

Grant/Award 1 txn

Insider Hytinen Barry

Role EVP and CFO

Type	Security	Shares	Price	Value
Grant/Award	Performance Units	166,412	$0.00	$0.00

Holdings After Transaction: Performance Units — 232,977 contracts (Direct)

Footnotes (3)

1. F1. Each Performance Unit ("PU") represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").
2. F2. The PUs were initially granted to the Reporting Person on March 1, 2023. This Form 4 is being filed to reflect the determination by the Compensation Committee, effective as of February 16, 2026, of the actual award of PUs under the grant after completion of the relevant performance period.
3. F3. The PU were initially granted to the Reporting Person on March 1, 2023, and will fully vest on March 1, 2026.

FAQ

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

What insider transaction did IRM EVP and CFO Barry Hytinen report on this Form 4?

Barry Hytinen reported an equity award of 166,412 Performance Units. These derivative securities were granted as part of his compensation and determined by the Compensation Committee after completion of the relevant performance period.

What does each Performance Unit reported by IRM’s CFO represent?

Each Performance Unit reported by IRM’s CFO represents a contingent right to receive one share of Iron Mountain Incorporated common stock. The ultimate share delivery depends on the terms of the award and vesting conditions.

When will the Performance Units reported by IRM’s CFO fully vest?

The Performance Units reported by IRM’s CFO will fully vest on March 1, 2026. They were initially granted on March 1, 2023, and vest after the completion of the performance and service period specified in the award.

How many Performance Units does IRM’s CFO hold after this Form 4 transaction?

After this transaction, IRM’s CFO is reported as directly owning 232,977 Performance Units. This total reflects the updated award determination and represents derivative securities tied to future delivery of Iron Mountain common shares.

Was the IRM CFO’s Form 4 transaction a market purchase or sale of stock?

No, the IRM CFO’s Form 4 shows a grant or award acquisition of Performance Units, coded “A.” It does not reflect an open-market purchase or sale, but rather equity compensation determined by the Compensation Committee.

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

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Accepted by SEC EDGAR 02/18/2026 - 05:15 PM EST 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^*

Hytinen Barry

(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 and CFO

3. Date of Earliest Transaction (Month/Day/Year)
02/16/2026

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)
			Code	V	Amount	(A) or (D)	Price

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
Performance Units	(1)	02/16/2026		A		166,412(2)		(3)	(3)	Common Stock, par value $.01 per share	166,412	$0	232,977	D

Explanation of Responses:

1. Each Performance Unit ("PU") represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

2. The PUs were initially granted to the Reporting Person on March 1, 2023. This Form 4 is being filed to reflect the determination by the Compensation Committee, effective as of February 16, 2026, of the actual award of PUs under the grant after completion of the relevant performance period.

3. The PU were initially granted to the Reporting Person on March 1, 2023, and will fully vest on March 1, 2026.

Remarks:

	/s/ Barry Hytinen	02/18/2026
	** 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.