Iron Mountain (NYSE: IRM) EVP preplanned sale of 59,725 shares

Rhea-AI Filing Summary

Iron Mountain Inc EVP Mithu Bhargava reported open-market sales of 59,725 shares of common stock on March 19, 2026. The shares were sold in multiple transactions at weighted-average prices generally between $103.62 and $105.56 per share. Following these sales, Bhargava directly owns 16,054 Iron Mountain shares. The filing notes that the transactions were executed under a pre-arranged Rule 10b5-1 trading plan adopted on December 19, 2025, indicating the sales were scheduled in advance rather than timed discretionarily.

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

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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^*

Bhargava Mithu

(Last) (First) (Middle)

C/O IRON MOUNTAIN INCORPORATED

85 NEW HAMPSHIRE AVE, 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 Digital Business Unit

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/19/2026

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	03/19/2026		S(1)		14,260	D	$104.25(2)	61,519	D
Common Stock, par value $.01 per share	03/19/2026		S(1)		12,537	D	$105.04(3)	48,982	D
Common Stock, par value $.01 per share	03/19/2026		S(1)		20	D	$105.64	48,962	D
Common Stock, par value $.01 per share	03/19/2026		S(1)		20,462	D	$104.3(4)	28,500	D
Common Stock, par value $.01 per share	03/19/2026		S(1)		12,446	D	$105.13(5)	16,054	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 December 19, 2025.

2. The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $103.62 to $104.61, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (2).

3. The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $104.62 to $105.56, inclusive. The Reporting Person undertakes to provide the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (3).

4. The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $103.71 to $104.70, inclusive. The Reporting Person undertakes to provide the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (4).

5. The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $104.71 to $105.56, inclusive. The Reporting Person undertakes to provide the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (5).

Remarks:

	/s/ Christine Zhang, under Power of Attorney dated November 19, 2024, from Mithu Bhargava	03/23/2026
	** 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 Mithu Bhargava report for Iron Mountain (IRM)?

Mithu Bhargava, EVP and GM of Iron Mountain’s Digital Business Unit, reported selling 59,725 shares of common stock on March 19, 2026. The sales were open-market transactions executed in multiple trades at weighted-average prices slightly above $103 to about $105 per share.

How many Iron Mountain (IRM) shares does Mithu Bhargava hold after the reported sale?

After the reported transactions, Mithu Bhargava directly holds 16,054 Iron Mountain common shares. This figure reflects his remaining position following the aggregate sale of 59,725 shares on March 19, 2026, as disclosed in the Form 4 insider trading report.

At what prices were Mithu Bhargava’s Iron Mountain (IRM) shares sold?

The reported prices are weighted averages, with trades occurring in ranges from $103.62 to $105.56 per share. Individual transactions were grouped into price bands, and Bhargava undertook to provide detailed breakdowns of the share counts at each price within those ranges upon request.

Was Mithu Bhargava’s Iron Mountain (IRM) stock sale under a Rule 10b5-1 plan?

Yes. The filing states the transaction was made under a Rule 10b5-1 trading plan adopted on December 19, 2025. Such plans allow insiders to schedule trades in advance, helping separate trading decisions from later material nonpublic information.

What role does Mithu Bhargava hold at Iron Mountain (IRM) in this Form 4 filing?

Mithu Bhargava is identified as an officer of Iron Mountain, serving as EVP, GM Digital Business Unit. This senior leadership role makes his equity transactions reportable, so his March 19, 2026 stock sales are disclosed publicly through the Form 4 filing.

How many total Iron Mountain (IRM) shares did Mithu Bhargava sell in this Form 4?

According to the transaction summary, Mithu Bhargava sold a total of 59,725 Iron Mountain common shares. These disposals were executed across five separate open-market sale entries, all dated March 19, 2026, and all involving non-derivative common stock positions.