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Iron Mountain Incorporated director Theodore R. Samuels II reported additional deferred equity-based compensation in the form of phantom stock units. On January 6, 2026, he acquired 425.125 phantom stock units at a weighted average price of $85.269 per unit and 107.445 phantom stock units at a weighted average price of $84.625 per unit. These entries reflect his quarterly cash board fees and dividends on common stock treated as if reinvested into phantom stock under the company’s Directors Deferred Compensation Plan. Each phantom stock unit is economically equivalent to one share of Iron Mountain common stock and will be settled in common shares after his disability or when his board service ends, bringing his reported phantom stock balance to 11,056.26 units held directly.
Iron Mountain Incorporated director Robin Matlock reported acquiring 10.189 phantom stock units on January 6, 2026 under the company’s Directors Deferred Compensation Plan. Each phantom share is economically equivalent to one share of Iron Mountain common stock and will be paid out in common shares on dates chosen by the director or as otherwise provided in the plan.
The 10.189 phantom shares reflect dividend equivalents, treating dividends on common stock as if they were reinvested into additional phantom shares. The weighted average reference price for this transaction was $84.625 per share, based on multiple trades between $84.304 and $84.979. Following this transaction, Matlock beneficially owns 10.189 phantom stock units directly.
Iron Mountain Incorporated director reports stock conversion under a deferred compensation plan. On 01/02/2026, the reporting person acquired 998 shares of Iron Mountain common stock at a price of $0 per share through the exercise of phantom stock units. After this transaction, the reporting person beneficially owned 28,549 shares of common stock in direct form.
The derivative position in 998 phantom stock units was reduced to zero as they were settled in common stock. Each phantom share was economically equivalent to one share of common stock, and settlement occurs in stock under the company’s Directors Deferred Compensation Plan, according to the reporting person’s elections and plan terms.
Iron Mountain Incorporated executive leadership reported a planned stock sale. The company’s EVP, GM Data Centers & ALM sold 6,000 shares of common stock on 01/02/2026 at a price of $83.1 per share. After this transaction, the executive directly owns 55,081 shares of Iron Mountain common stock.
The sale was executed under a pre-arranged Rule 10b5-1 trading plan that the reporting person adopted on March 20, 2025. Such plans allow insiders to systematically sell shares according to set instructions, helping separate personal trading decisions from day-to-day corporate developments.
Iron Mountain Inc. executive reports RSU vesting and share transactions. On 01/02/2026, an officer of Iron Mountain Inc. (EVP, CHRO) exercised 1,909 restricted stock units into 1,909 shares of common stock at an exercise price of $0. On the same date, 944 shares of common stock were disposed of at a price of $83.24 per share, leaving 965 shares of common stock beneficially owned directly after these transactions. The derivative table shows 1,909 RSUs converting into common stock and 3,819 derivative securities (RSUs) remaining beneficially owned. These RSUs were part of a grant covering 5,728 shares of common stock awarded on January 2, 2025, scheduled to vest in three substantially equal annual installments starting on the first anniversary of the grant date.
Iron Mountain Incorporated executive reports RSU vesting and tax share withholding. The company’s EVP, General Counsel and Secretary reported the partial vesting of restricted stock units previously granted on January 2, 2024. On January 2, 2026, 1,214 shares of common stock were acquired at an exercise price of $0 upon conversion of RSUs. On the same date, 469 shares of common stock were disposed of at $83.24 per share, described as a transaction with code “F,” which typically reflects shares withheld to cover taxes.
Following these transactions, the executive beneficially owns 5,752 shares of Iron Mountain common stock directly, along with 1,214 RSUs. The RSU award originally covered 3,642 shares of common stock and vests in three substantially equal annual installments beginning on the first anniversary of the January 2, 2024 grant date.
Iron Mountain Incorporated’s President and CEO William Meaney reported an option exercise and related stock sales. On 01/02/2026, he exercised an employee stock option to acquire 38,482 shares of common stock at an exercise price of $37 per share. That same day, he sold 25,809 shares at a weighted average price of $82.988 and 12,673 shares at a weighted average price of $83.545, both under transaction code “S” for sale.
The filing states these trades were made under a Rule 10b5-1 trading plan adopted on March 14, 2025. Following the transactions, Meaney reported no directly held common stock, but disclosed indirect ownership of 82,970 shares through the Meaney 2024 Master Trust and 212,680 shares through Meaney Master Trust #2, as well as 423,214 employee stock options remaining beneficially owned.
An insider has filed a notice under Rule 144 to sell 38,482 shares of common stock through Fidelity Brokerage Services on the NYSE, with an aggregate market value of $3,194,006.00. The filing notes that there were 295,589,491 shares of this class outstanding at the time of the notice, so the planned sale represents a small portion of the total.
The shares to be sold were acquired on 01/02/2026 by exercising an option that had been granted on 02/16/2017, with the purchase price paid in cash. Over the past three months, the same seller completed two additional sales of common stock, each for 69,125 shares, with gross proceeds of $7,102,393.29 and $5,760,649.39. By signing the notice, the seller represents that they are not aware of any material adverse, nonpublic information about the issuer’s operations.
Iron Mountain (IRM) insider Mark Kidd has filed a notice of proposed sale of company shares under Rule 144. The filing reports a planned sale of 6,000 shares of common stock through Fidelity Brokerage Services LLC, with an aggregate market value of 498600.00. These shares are part of 295,589,491 common shares outstanding and are expected to be sold on or about 01/02/2026 on the NYSE.
The securities to be sold were acquired on 03/01/2024 through restricted stock vesting from the issuer as compensation. The notice also discloses prior sales by the same seller over the past three months, including 7,306 shares sold on 10/31/2025 for gross proceeds of 736,590.92, 6,000 shares on 11/03/2025 for 615,060.00, and 6,000 shares on 12/01/2025 for 510,000.00.
Iron Mountain Incorporated has filed a registration statement on Form S-8 to register an additional 4,600,000 shares of its Common Stock for issuance under the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan, as amended.
This adds to the shares available for future awards under the plan, supporting stock-based incentive compensation. The filing also describes the company’s Delaware law provisions that limit personal liability of directors and officers and provide indemnification, and it lists related charter, bylaw and plan documents, along with legal and accounting consents, as exhibits.