William L. Meaney - 20 Feb 2026 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)

Signature
/s/ Christine Zhang, under Power of Attorney dated February 27, 2025, from William Meaney
Issuer symbol
IRM
Transactions as of
20 Feb 2026
Net transactions value
-$2,738,195
Form type
4
Filing time
24 Feb 2026, 16:06:16 UTC
Previous filing
18 Feb 2026
Next filing
03 Mar 2026

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 24 Feb 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 $1,423,538 +38,474 $37.00 38,474 20 Feb 2026 Direct F1
transaction IRM Common Stock, par value $.01 per share Sale $4,161,733 -38,474 -100% $108.17 0 20 Feb 2026 Direct F1
holding IRM Common Stock, par value $.01 per share 82,970 20 Feb 2026 By Meaney 2024 Master Trust
holding IRM Common Stock, par value $.01 per share 212,680 20 Feb 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 -38,474 -9.1% 384,740 20 Feb 2026 Common Stock, par value $.01 per share 38,474 $37.00 Direct F1, F2, F3
* 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 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.
F3 Not applicable.