X0306 4 2014-03-10 0 0001020569 IRON MOUNTAIN INC IRM 0001296569 Drapeau Anne S C/O IRON MOUNTAIN INCORPORATED ONE FEDERAL STREET BOSTON MA 02110 0 1 0 0 EVP, Strategy and Talent Common Stock, par value $.01 per share 2014-03-10 4 A 0 3804 0 A 13572 D Common Stock, par value $.01 per share 2014-03-10 4 F 0 1287 27.97 D 12285 D Common Stock, par value $.01 per share 2014-03-11 4 A 0 719 0 A 13004 D Common Stock, par value $.01 per share 2014-03-11 4 F 0 234 27.92 D 12770 D Common Stock, par value $.01 per share 2014-03-11 4 A 0 4759 0 A 17529 D Common Stock, par value $.01 per share 2014-03-11 4 F 0 1549 27.92 D 15980 D Restricted Stock Units 2014-03-10 4 D 0 3804 0 D Common Stock 3804 3817 D Restricted Stock Units 2014-03-11 4 D 0 719 0 D Common Stock 719 0 D Performance Units 2014-03-11 4 D 0 4759 0 D Common Stock 4759 0 D Performance Units 2014-03-10 4 A 0 6762 0 A Common Stock 6762 6762 D This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 9, 2012. This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on March 11, 2011. This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on March 11, 2011. Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock"). The RSUs, representing a contingent right to receive a total of 11,423 shares of Common Stock, were granted to the Reporting Person on March 9, 2012 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date. The RSUs, representing a contingent right to receive a total of 2,084 shares of Common Stock, were granted to the Reporting Person on March 11, 2011 and have vested in full in three substantially equal annual installments, the last of which was on March 11, 2014. Each PU represents a contingent right to receive one share of Common Stock. The PUs fully vested on March 11, 2014. The PUs were previously granted to the Reporting Person on March 15, 2013, and on March 10, 2014 the Compensation Committee of Iron Mountain Incorporated's Board of Directors determined the actual award of PUs under the grant after completion of the relevant performance period. The PUs fully vest on March 15, 2016, subject to certain exceptions, if the Reporting Person is, as of that date, continuing to perform services for Iron Mountain Incorporated. /s/ Sarah Cammarata, under Power of Attorney dated November 1, 2013, from Anne S. Drapeau 2014-03-12