Iron Mountain (IRM) EVP Mark Kidd sells 6,000 shares under 10b5-1 plan

Rhea-AI Filing Summary

IRON MOUNTAIN INC executive Mark Kidd, EVP and GM of Data Centers & ALM, reported selling 6,000 shares of common stock on August 7, 2026 at $122.70 per share. The sale was executed under a Rule 10b5-1 trading plan adopted on March 20, 2025. Following this transaction, Kidd directly holds 101,507 shares of IRON MOUNTAIN INC common stock.

Insider Trade Summary 10b5-1

Net Seller: 6,000 shares

Net Sell 1 txn

Insider Kidd Mark

Role EVP, GM Data Centers & ALM

Sold 6,000 shs ($736K)

Type	Security	Shares	Price	Value
Sale	Common Stock, par value $.01 per share F1	6,000	$122.70	$736K

Holdings After Transaction: Common Stock, par value $.01 per share — 101,507 shares (Direct)

Footnotes (1)

1. F1. The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 20, 2025.

Key Figures

Shares sold: 6,000 shares Sale price per share: $122.70 per share Shares held after transaction: 101,507 shares

3 metrics

Shares sold 6,000 shares Common stock sale by Mark Kidd on August 7, 2026

Sale price per share $122.70 per share Price for the 6,000 IRON MOUNTAIN INC shares sold

Shares held after transaction 101,507 shares Direct ownership position of Mark Kidd after the sale

Key Terms

Rule 10b5-1 trading plan, par value, Form 4

3 terms

Rule 10b5-1 trading plan regulatory

"The transaction was made pursuant to a Rule 10b5-1 trading plan"

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.

par value financial

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

Par value is the fixed amount printed on a bond or stock that represents its original value when issued. It’s like the face value of a coin or bill—what the issuer promises to pay back or the starting price of a stock—though it often doesn’t change with market prices. It matters because it helps determine certain financial details, like how much the company will pay back at maturity.

Form 4 regulatory

"reported in a Form 4 insider transaction filing"

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.

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

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Available on EDGAR 08/10/2026 - 04:08 PM Accepted by SEC EDGAR 08/10/2026 - 04:08 PM Learn about SEC filing dates

FAQ

What insider transaction did IRM executive Mark Kidd report?

Mark Kidd reported a sale of 6,000 IRON MOUNTAIN INC (IRM) shares on August 7, 2026 at $122.70 per share. After this transaction, he directly holds 101,507 shares of the company’s common stock.

Was the IRM insider sale by Mark Kidd under a Rule 10b5-1 plan?

Yes. The 6,000-share sale by IRM executive Mark Kidd was made under a Rule 10b5-1 trading plan adopted on March 20, 2025, indicating the trades were pre-arranged.

How many IRM shares does Mark Kidd hold after the reported sale?

After selling 6,000 shares, Mark Kidd directly holds 101,507 shares of IRON MOUNTAIN INC common stock. This figure reflects his reported direct ownership position immediately following the August 7, 2026 transaction.

What price did IRM executive Mark Kidd receive per share in the sale?

Mark Kidd’s reported sale of IRON MOUNTAIN INC (IRM) common stock was executed at $122.70 per share. The transaction involved 6,000 shares of common stock, as disclosed in the Form 4 filing.

What role does Mark Kidd hold at IRON MOUNTAIN INC (IRM)?

Mark Kidd is an officer of IRON MOUNTAIN INC, serving as EVP, GM Data Centers & ALM. His position and the reported 6,000-share sale are disclosed in the Form 4.

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 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)
	EVP, GM Data Centers & ALM

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/07/2026

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	08/07/2026		S(1)		6,000	D	$122.7	101,507	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 March 20, 2025.

Remarks:

	/s/ Christine Zhang, under Power of Attorney dated June 19, 2025, from Mark Kidd	08/10/2026
	** 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)