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  4. [Form 4] IRON MOUNTAIN INC Insider Trading Activity

Iron Mountain EVP sells 5,000 shares at $115.60

EVP and Chief Commercial Officer Greg W. McIntosh sold 5,000 IRM shares under a pre-arranged Rule 10b5-1 trading plan, leaving him with 75,634 shares.

Filing Impact
(Moderate)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

IRON MOUNTAIN INC (IRM) executive Greg W. McIntosh, EVP and Chief Commercial Officer, reported selling 5,000 shares of common stock on September 1, 2026 at $115.60 per share in an open-market or private transaction. After this sale, he directly holds 75,634 shares, and the trade was made under a Rule 10b5-1 trading plan adopted on May 8, 2026.

Positive

  • None.

Negative

  • None.
Insider McIntosh Greg W
Role EVP, Chief Commercial Officer
Sold 5,000 shs ($578K)
Type Security Shares Price Value
Sale Common Stock, par value $.01 per share F1 5,000 $115.60 $578K
Holdings After Transaction: Common Stock, par value $.01 per share — 75,634 shares (Direct)
Footnotes (1)
  1. F1. The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 8, 2026.
Shares sold 5,000 shares Common stock sale reported for September 1, 2026
Sale price per share $115.60 per share Price for the 5,000 common shares sold on September 1, 2026
Shares held after transaction 75,634 shares Direct ownership by Greg W. McIntosh following the reported sale
Net shares sold in filing 5,000 shares Net-sell direction across all transactions in this Form 4
Rule 10b5-1 plan adoption date May 8, 2026 Date the trading plan governing this sale was adopted
Rule 10b5-1 trading plan regulatory
"The transaction was made pursuant to a Rule 10b5-1 trading plan adopted"
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 or private transaction market
"Sale in open market or private transaction"
Form 4 regulatory
"reported in this Form 4 insider transaction disclosure"
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.

FAQ

What insider transaction did IRM executive Greg McIntosh report?
Greg W. McIntosh reported a sale of 5,000 IRM shares of common stock on September 1, 2026 at $115.60 per share in an open-market or private transaction, as disclosed in the Form 4.

How many IRM shares does Greg McIntosh hold after this Form 4 transaction?
After the reported sale, Greg W. McIntosh directly holds 75,634 shares of IRON MOUNTAIN INC common stock, according to the Form 4 disclosure.

Was Greg McIntosh’s IRM share sale under a Rule 10b5-1 plan?
Yes. The filing states the transaction was made pursuant to a Rule 10b5-1 trading plan adopted by Greg W. McIntosh on May 8, 2026, and the plan checkbox is affirmed.

What price did Greg McIntosh receive per IRM share in this sale?
The reported sale price was $115.60 per share for the 5,000 IRM common shares sold on September 1, 2026, described as a sale in an open-market or private transaction.

Is this IRM Form 4 transaction a purchase or a sale of shares?
The Form 4 reports a sale of shares. Greg W. McIntosh disposed of 5,000 shares of IRON MOUNTAIN INC common stock, with no purchases reported in this filing.

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SEC Form 4
FORM 4UNITED 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*
McIntosh Greg W
(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)
Director10% Owner
XOfficer (give title below)Other (specify below)
EVP, Chief Commercial Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
09/01/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock, par value $.01 per share09/01/2026S(1)5,000D$115.675,634D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount 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 May 8, 2026.
Remarks:
/s/ Christine Zhang, under Power of Attorney dated June 19, 2025, from Greg McIntosh09/02/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR