Iron Mountain holds annual meeting; elects directors, approves say-on-pay, ratifies auditor

On May 9, 2023, the Board of Directors of Iron Mountain Incorporated (the “Company”) approved amendments to the Company’s Bylaws (the “Bylaws”), effective immediately. The Bylaws were amended to enhance the procedural mechanics and disclosure requirements in connection with stockholder nominations of directors pursuant to Rule 14a-19 under the Securities Exchange Act of 1934, as amended.

At the Annual Meeting of Stockholders of the Company held on May 9, 2023 (the “Annual Meeting”), the Company’s stockholders elected ten directors, each for a one-year term of office to serve until the Company’s 2024 Annual Meeting of Stockholders, or until their successors are elected and qualified. The nominated directors received the following votes: Name For Against Abstain Broker Non-Vote Jennifer Allerton 206,011,205 1,170,618 328,792 41,886,642 Pamela M. Arway 201,495,688 5,692,285 322,642 41,886,642 Clarke H. Bailey 198,611,800 8,538,553 360,262 41,886,642 Kent P. Dauten 201,806,154 5,353,915 350,546 41,886,642 Monte Ford 203,785,698 3,365,454 359,463 41,886,642 Robin L. Matlock 205,378,603 1,785,166 346,846 41,886,642 William L. Meaney 206,463,971 686,934 359,710 41,886,642 Wendy J. Murdock 195,012,482 12,167,526 330,607 41,886,642 Walter C. Rakowich 204,050,613 3,101,810 358,192 41,886,642 Doyle R. Simons 205,273,208 1,877,627 359,780 41,886,642

At the Annual Meeting, the Company’s stockholders approved a nonbinding advisory resolution on the frequency (every one, two or three years) of future non-binding advisory votes of stockholders on the compensation paid to the Company’s named executive officers. This proposal received the following votes: 1 Year 2 Years 3 Years Abstain Broker Non-Vote 201,191,102 489,999 5,285,399 544,115 41,886,642

At the Annual Meeting, the Company’s stockholders ratified the appointment of Deloitte & Touche LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2023. This proposal received the following votes: For Against Abstain 240,549,181 8,389,896 458,180

At the Annual Meeting, the Company’s stockholders approved a nonbinding advisory resolution on the compensation paid to the Company’s named executive officers as disclosed pursuant to Item 402 of Regulation S-K in the Company’s Proxy Statement for the Annual Meeting dated March 30, 2023 . This proposal received the following votes: For Against Abstain Broker Non-Vote 197,011,387 9,569,439 929,789 41,886,642