William L. Meaney - 02 Jan 2026 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)

Role
President and CEO, Director
Signature
/s/ Christine Zhang, under Power of Attorney dated February 27, 2025, from William Meaney
Issuer symbol
IRM
Transactions as of
02 Jan 2026
Net transactions value
-$1,776,769
Form type
4
Filing time
06 Jan 2026, 18:12:15 UTC
Previous filing
03 Dec 2025
Next filing
18 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Meaney William L President and CEO, Director C/O IRON MOUNTAIN INCORPORATED, 85 NEW HAMPSHIRE AVENUE, SUITE 150, PORTSMOUTH /s/ Christine Zhang, under Power of Attorney dated February 27, 2025, from William Meaney 06 Jan 2026 0001566391

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction IRM Common Stock, par value $.01 per share Options Exercise $1,423,834 +38,482 $37.00 38,482 02 Jan 2026 Direct F1
transaction IRM Common Stock, par value $.01 per share Sale $2,141,837 -25,809 -67% $82.99 12,673 02 Jan 2026 Direct F1, F2
transaction IRM Common Stock, par value $.01 per share Sale $1,058,766 -12,673 -100% $83.54 0 02 Jan 2026 Direct F1, F3
holding IRM Common Stock, par value $.01 per share 82,970 02 Jan 2026 By Meaney 2024 Master Trust
holding IRM Common Stock, par value $.01 per share 212,680 02 Jan 2026 By Meaney Master Trust #2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction IRM Employee Stock Option (Right to Buy) Options Exercise -38,482 -8.3% 423,214 02 Jan 2026 Common Stock, par value $.01 per share 38,482 $37.00 Direct F1, F4, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id Content
F1 The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025.
F2 The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $82.405 to $83.402, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (2).
F3 The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $83.405 to $83.755, inclusive. The Reporting Person undertakes to provide the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (3).
F4 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.
F5 Not applicable.