Mark Kidd reports three 6,000-share Rule 144 sales

Mark Kidd reported sales of Common Stock under Rule 144.

Rhea-AI Filing Summary

Mark Kidd reported sales of Common Stock under Rule 144. The filing lists three dispositions of 6,000 shares each on 03/02/2026 ($643,620), 04/01/2026 ($616,260), and 05/08/2026 ($767,460).

The excerpt also lists a block of 6,000 shares associated with Fidelity Brokerage Services LLC with a value of $760,200 and a date of 06/01/2026 under "Securities To Be Sold."

Key Figures

Sale on 03/02/2026: 6,000 shares Sale on 04/01/2026: 6,000 shares Sale on 05/08/2026: 6,000 shares +1 more

4 metrics

Sale on 03/02/2026 6,000 shares Disposition listed with proceeds $643,620

Sale on 04/01/2026 6,000 shares Disposition listed with proceeds $616,260

Sale on 05/08/2026 6,000 shares Disposition listed with proceeds $767,460

Securities to be sold (broker row) 6,000 shares Fidelity Brokerage Services LLC entry valued at $760,200 dated 06/01/2026

Key Terms

Restricted Stock Vesting, Securities To Be Sold, Fidelity Brokerage Services LLC

3 terms

Restricted Stock Vesting financial

"Restricted Stock Vesting | Issuer | 02/19/2023"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Securities To Be Sold regulatory

"144: Securities To Be Sold"

Fidelity Brokerage Services LLC other

"Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917"

FAQ

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

What sales did Mark Kidd report in the IRM Form 144?

Mark Kidd reported three sales of 6,000 shares each. The filing shows sales on 03/02/2026 ($643,620), 04/01/2026 ($616,260), and 05/08/2026 ($767,460), listed as Common stock dispositions.

Does the filing show a broker or intermediary for any sale?

The excerpt names Fidelity Brokerage Services LLC for a 6,000-share entry. That row lists $760,200 and the date 06/01/2026 under "Securities To Be Sold." The document fragment provides no additional broker instructions.

Are the shares listed tied to compensation vesting?

Yes; parts of the excerpt reference "Restricted Stock Vesting." Multiple lines show "Restricted Stock Vesting" with dates in 2023 and share counts associated with compensation-related issuances.

Do the listed amounts represent gross proceeds from each sale?

The filing displays dollar amounts alongside each 6,000-share sale row. Those amounts ($643,620, $616,260, $767,460) appear in the sales table but no further proceeds allocation is provided in the excerpt.

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

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Accepted by SEC EDGAR 06/01/2026 - 11:39 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	6000	760200.00	297524681	06/01/2026	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	02/19/2023	Restricted Stock Vesting	Issuer			1786	02/19/2023	Compensation
Common	02/23/2023	Restricted Stock Vesting	Issuer			142	02/23/2023	Compensation
Common	03/01/2023	Restricted Stock Vesting	Issuer			4072	03/01/2023	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

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	03/02/2026	6000	643620.00
Mark Kidd 85 New Hampshire Avenue Suite 150 Portsmouth NH 03801	Common	04/01/2026	6000	616260.00
Mark Kidd 85 New Hampshire Avenue Suite 150 Portsmouth NH 03801	Common	05/08/2026	6000	767460.00

144: Remarks and Signature

Remarks
Date of Notice	06/01/2026
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/Wade Moss, 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)