X0306 4 2013-06-07 0 0001020569 IRON MOUNTAIN INC IRM 0001566391 Meaney William L C/O IRON MOUNTAIN INCORPORATED 745 ATLANTIC AVENUE BOSTON MA 02111 1 1 0 0 President and CEO Common Stock, par value $.01 per share 2013-06-07 4 P 0 12000 29.0001 A 12000 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $29.00 to $29.0037, inclusive. The Reporting Person undertakes to provide to Iron Mountain Incorporated, any security holder of Iron Mountain Incorporated, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote (1). /s/ Sarah Cammarata, under Power of Attorney dated January 7, 2013, from William Meaney 2013-06-07