Iron Mountain (NYSE: IRM) accounting chief sells 7,189 shares

Rhea-AI Filing Summary

IRON MOUNTAIN INC senior vice president and chief accounting officer Daniel Borges reported an open-market sale of 7,189 shares of common stock at $125.50 per share. The transaction on May 21, 2026 reduced his directly held common shares to zero. According to a footnote, the sale was carried out under a pre-arranged Rule 10b5-1 trading plan adopted on February 19, 2026, indicating the trade was scheduled in advance rather than timed discretionarily.

Insider Trade Summary 10b5-1

Net Seller: 7,189 shares ($902,220)

Net Sell 1 txn

Insider Borges Daniel

Role SVP & Chief Accounting Officer

Sold 7,189 shs ($902K)

Type	Security	Shares	Price	Value
Sale	Common Stock, par value $.01 per share	7,189	$125.50	$902K

Holdings After Transaction: Common Stock, par value $.01 per share — 0 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 7,189 shares Sale price: $125.50 per share Shares owned after: 0 shares +2 more

5 metrics

Shares sold 7,189 shares Open-market sale of common stock on May 21, 2026

Sale price $125.50 per share Price for the 7,189 shares of common stock sold

Shares owned after 0 shares Total directly held common shares following the transaction

Rule 10b5-1 plan adoption date February 19, 2026 Pre-arranged trading plan governing the reported sale

Net share direction -7,189 shares Form 4 transaction summary shows net-sell direction

Key Terms

Rule 10b5-1 trading plan, open-market sale, Form 4, Common Stock, par value $.01 per share

4 terms

Rule 10b5-1 trading plan regulatory

"The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person"

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.

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Common Stock, par value $.01 per share financial

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

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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^*

Borges Daniel

(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)
	SVP & Chief Accounting Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/21/2026

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	05/21/2026		S(1)		7,189	D	$125.5	0	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 February 19, 2026.

Remarks:

	/s/ Christine Zhang, under Power of Attorney dated June 19, 2025 from Daniel Borges	05/26/2026
	** 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)

FAQ

What insider transaction did IRM executive Daniel Borges report?

Daniel Borges reported selling 7,189 shares of IRON MOUNTAIN INC common stock. The shares were sold in an open-market transaction at a price of $125.50 per share, as disclosed in a Form 4 insider trading report.

At what price were Daniel Borges’ IRM shares sold?

The reported sale by Daniel Borges was executed at $125.50 per share. This price applies to 7,189 shares of IRON MOUNTAIN INC common stock in an open-market transaction disclosed in the Form 4 filing.

How many IRM shares does Daniel Borges hold after this Form 4 sale?

Following the reported sale, Daniel Borges directly holds zero shares of IRON MOUNTAIN INC common stock. The Form 4 explicitly states that total shares owned after the transaction are 0.0000 for his direct holdings.

Was the IRM insider sale by Daniel Borges under a Rule 10b5-1 plan?

Yes. A footnote explains the sale was made under a Rule 10b5-1 trading plan. The plan was adopted on February 19, 2026, meaning the trade was pre-scheduled rather than initiated at the insider’s sole discretion.

What role does Daniel Borges hold at IRON MOUNTAIN INC (IRM)?

Daniel Borges serves as senior vice president and chief accounting officer at IRON MOUNTAIN INC. This role is identified in the insider data, indicating he is a company officer subject to Form 4 reporting requirements.