Iron Mountain insider plans $4.45M stock sale

Rhea-AI Filing Summary

IRON MOUNTAIN INC (IRM) is the issuer for which William L. Meaney has filed a Rule 144 notice covering a proposed sale of common stock. The notice reports that up to 38,474 shares of IRM common stock may be sold on or about 09/01/2026 in connection with a Stock Option Exercise, with Fidelity Brokerage Services LLC as broker and NYSE as the listed exchange. The filing also lists three separate sales by Meaney over the prior three months, each for 38,474 shares of common stock, with stated aggregate sale prices on 06/01/2026, 07/01/2026, and 08/07/2026.

Key Figures

Proposed shares to be sold: 38,474 shares of common stock Aggregate market value of securities to be sold: $4,447,594.40 Shares sold 06/01/2026: 38,474 shares; $4,907,512.60 +2 more

5 metrics

Proposed shares to be sold 38,474 shares of common stock Planned sale on or about 09/01/2026 in connection with Stock Option Exercise

Aggregate market value of securities to be sold $4,447,594.40 Value reported for 38,474 IRM common shares in securities information section

Shares sold 06/01/2026 38,474 shares; $4,907,512.60 Common stock sale by William L. Meaney during past three months

Shares sold 07/01/2026 38,474 shares; $4,725,826.83 Common stock sale by William L. Meaney during past three months

Shares sold 08/07/2026 38,474 shares; $4,681,000.77 Common stock sale by William L. Meaney during past three months

Key Terms

Rule 144, Stock Option Exercise, attorney-in-fact

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Stock Option Exercise financial

"Common | 09/01/2026 | Stock Option Exercise | Issuer"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

attorney-in-fact regulatory

"as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

What transaction is disclosed for IRM in this Form 144 filing?

The filing discloses a planned sale of up to 38,474 shares of IRON MOUNTAIN INC (IRM) common stock by William L. Meaney on or about 09/01/2026, in connection with a Stock Option Exercise through Fidelity Brokerage Services LLC.

Who is the person planning to sell IRM shares under this Form 144?

The person is William L. Meaney, who has filed a notice for the sale of IRON MOUNTAIN INC (IRM) common stock under Rule 144, with Fidelity Brokerage Services LLC acting as the broker and attorney-in-fact signing on his behalf.

How many IRM shares are planned to be sold on 09/01/2026?

The notice covers a proposed sale of up to 38,474 shares of IRON MOUNTAIN INC (IRM) common stock, with a reported aggregate market value of $4,447,594.40 for those securities in the filing’s securities information section.

What prior IRM share sales by William L. Meaney are disclosed?

The filing lists three sales of IRON MOUNTAIN INC (IRM) common stock by William L. Meaney in the past three months: 38,474 shares on 06/01/2026 for $4,907,512.60, 38,474 shares on 07/01/2026 for $4,725,826.83, and 38,474 shares on 08/07/2026 for $4,681,000.77.

Which broker is involved in the IRM Form 144 transaction?

The broker listed is Fidelity Brokerage Services LLC, located at 900 Salem Street, Smithfield, RI. The Form 144 is signed by Jennifer Ruchti as a duly authorized representative and attorney-in-fact for William L. Meaney.

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Available on EDGAR 09/01/2026 - 10:06 AM Accepted by SEC EDGAR 09/01/2026 - 10:06 AM 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	0001566391
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	Meaney William L
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
Relationship to Issuer	Director

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	38474	4447594.40	297702812	09/01/2026	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	09/01/2026	Stock Option Exercise	Issuer			38474	09/01/2026	Cash

* 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
William L. Meaney 85 New Hampshire Avenue Suite 150 Portsmouth NH 03801	Common	06/01/2026	38474	4907512.60
William L. Meaney 85 New Hampshire Avenue Suite 150 Portsmouth NH 03801	Common	07/01/2026	38474	4725826.83
William L. Meaney 85 New Hampshire Avenue Suite 150 Portsmouth NH 03801	Common	08/07/2026	38474	4681000.77

144: Remarks and Signature

Remarks
Date of Notice	09/01/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/13/2025
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/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for William L. Meaney
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)