Iron Mountain (IRM) Form 144: planned sale of 7,306 shares

Iron Mountain (IRM) filed a Form 144 notice for the proposed sale of 7,306 common shares, with an aggregate market value of $736,590.92.

Rhea-AI Filing Summary

Iron Mountain (IRM) filed a Form 144 notice for the proposed sale of 7,306 common shares, with an aggregate market value of $736,590.92. The filing lists an approximate sale date of 10/31/2025 on the NYSE, with Fidelity Brokerage Services LLC as broker.

The shares relate to an “Option Granted – 03/09/2016,” with the acquisition and payment dates shown as 10/31/2025. The notice also reports 295,348,225 shares outstanding. Recent activity disclosed includes sales by Mark Kidd of 6,000 shares on 08/01/2025 (gross proceeds $583,200.00), 6,000 shares on 09/02/2025 (gross proceeds $546,300.00), and 6,000 shares on 10/01/2025 (gross proceeds $609,780.00).

FAQ

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

What does Iron Mountain (IRM) disclose in this Form 144?

A proposed sale of 7,306 common shares with an aggregate market value of $736,590.92, to be sold on 10/31/2025 on the NYSE.

Who is the broker for the planned IRM share sale?

The filing lists Fidelity Brokerage Services LLC as broker.

What prior sales are reported in the past 3 months?

Sales by Mark Kidd: 6,000 shares on 08/01/2025 for $583,200.00, 6,000 on 09/02/2025 for $546,300.00, and 6,000 on 10/01/2025 for $609,780.00.

How many Iron Mountain shares are outstanding?

The notice reports 295,348,225 shares outstanding.

What is the exchange and class of securities involved?

Class: Common. Exchange: NYSE.

What is the acquisition detail for the shares being sold?

The filing states “Option Granted – 03/09/2016,” with acquisition and payment dates shown as 10/31/2025.

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

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Accepted by SEC EDGAR 10/31/2025 - 10:31 AM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001732058
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	IRON MOUNTAIN INC
SEC File Number	001-13045
Address of Issuer	85 NEW HAMPSHIRE AVENUE, SUITE 150 PEASE INTERNATIONAL TRADEPORT PORTSMOUTH NEW HAMPSHIRE 03801
Phone	617-535-4781
Name of Person for Whose Account the Securities are To Be Sold	Kidd Mark
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	7306	736590.92	295348225	10/31/2025	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	10/31/2025	Option Granted - 03/09/2016	Issuer			7306	10/31/2025	NYSE

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Mark Kidd 85 New Hampshire Avenue Suite 150 Portsmouth NH 03801	Common	08/01/2025	6000	583200.00
Mark Kidd 85 New Hampshire Avenue Suite 150 Portsmouth NH 03801	Common	09/02/2025	6000	546300.00
Mark Kidd 85 New Hampshire Avenue Suite 150 Portsmouth NH 03801	Common	10/01/2025	6000	609780.00

144: Remarks and Signature

Remarks
Date of Notice	10/31/2025
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/20/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Gary Redman, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Mark Kidd
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)