William L. Meaney - 05 Mar 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
05 Mar 2026
Net transactions value
-$10,482,131
Form type
4
Filing time
09 Mar 2026, 16:31:00 UTC
Previous filing
05 Mar 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 09 Mar 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 Sale $2,766,022 -26,278 -27% $105.26 72,379 05 Mar 2026 Direct F1, F2
transaction IRM Common Stock, par value $.01 per share Sale $3,647,102 -34,358 -47% $106.15 38,021 05 Mar 2026 Direct F1, F3
transaction IRM Common Stock, par value $.01 per share Sale $4,069,007 -38,021 -100% $107.02 0 05 Mar 2026 Direct F1, F4
holding IRM Common Stock, par value $.01 per share 82,970 05 Mar 2026 By Meaney 2024 Master Trust
holding IRM Common Stock, par value $.01 per share 212,680 05 Mar 2026 By Meaney Master Trust #2
* 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 $104.62 to $105.61, 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 $105.62 to $106.61, 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 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 $106.62 to $107.54, 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 (4).