Form 4 Filing for Theodore R. Samuels II

Theodore R. Samuels II, a director at IRON MOUNTAIN INC (IRM), reported a transaction involving 99.06 shares of phantom stock on July 6, 2026. These phantom shares, granted under the Directors Deferred Compensation Plan, are economically equivalent to common stock and will be settled in common stock upon disability or cessation of service. The transaction also reflects the reinvestment of dividends. Following this transaction, Mr. Samuels holds 13,800.33 shares of phantom stock. The filing also includes a power of attorney, dated July 6, 2023, authorizing specific individuals to act on Mr. Samuels' behalf for Section 16 filings.