IRM Form 144: $531K Share Sale Represents 0.002% of Float

Rhea-AI Filing Summary

Iron Mountain Inc. (IRM) filed a Form 144 indicating an insider’s intent to sell up to 5,432 common shares through Fidelity Brokerage Services on the NYSE around 07/31/2025. At the latest market price used in the filing, the transaction is valued at $530,978.

The shares stem from two restricted-stock vesting events (3,047 shares on 05/09/2023 and 2,385 shares on 05/30/2024) received as compensation. Relative to the company’s 295,043,896 shares outstanding, the proposed sale represents roughly 0.0018 % of the float, implying immaterial ownership impact.

Under Rule 144, the filer certifies they hold no undisclosed adverse information about IRM. No prior sales were reported in the past three months. While insider sales can sometimes signal caution, the size and timing suggest routine diversification rather than a strategic shift.

Insights

Corporate Governance Expert

TL;DR: Minor Form 144 sale (~$531k, 0.0018% float) appears routine; neutral governance signal.

The filing meets Rule 144 disclosure standards, outlines proper acquisition history, and affirms no undisclosed negative information. Scale is negligible versus IRM’s market capitalization and does not alter control dynamics or board representation. Routine liquidity events like this seldom affect corporate governance risk profiles.

Portfolio Manager

TL;DR: Insider divesting 5,432 IRM shares is immaterial and unlikely to move the stock.

At just under $0.6 million, the sale is a rounding error for a multi-billion-dollar REIT. No clustering of insider sales is evident, and acquisition via stock compensation supports the view of ordinary portfolio rebalancing. I view the disclosure as not impactful to investment thesis or liquidity.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	5432	530978.00	295043896	07/31/2025	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	05/09/2023	Restricted Stock Vesting	Issuers			3047	05/09/2023	Compensation
Common	05/30/2024	Restricted Stock Vesting	Issuers			2385	05/30/2024	Compensation

* 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

Nothing to Report

144: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

How many IRM shares are being registered for sale under Form 144?

5,432 common shares are slated for potential sale.

What is the aggregate market value of the Iron Mountain shares to be sold?

The filing cites an approximate value of $530,978.

What percent of Iron Mountain’s outstanding shares does the sale represent?

Only about 0.0018 % of the 295,043,896 shares outstanding.

When is the planned sale date for the IRM shares?

The filer lists an approximate sale date of 07/31/2025.

How were the shares originally acquired?

All shares came from restricted-stock vesting events on 05/09/2023 and 05/30/2024.

Which broker is named in the filing?

Fidelity Brokerage Services LLC in Smithfield, RI, will handle the trade.

Does the insider claim to hold undisclosed adverse information?

No; the signer affirms they possess no material non-public adverse information about IRM.