X0306 4 2013-04-17 0 0001020569 IRON MOUNTAIN INC IRM 0001279505 LAMACH MICHAEL W C/O INGERSOLL RAND COMPANY 800 E. BEATY STREET DAVIDSON NC 28117 1 0 0 0 Phantom Stock 2013-04-17 4 A 0 12.9501 36.46 A Common Stock 12.9501 1762.8430 D Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock become payable in cash following the Reporting Person's disability or cessation of service as a director. Each share of phantom stock is the economic equivalent of one share of common stock. These shares give effect to dividends paid on common stock as if reinvested in phantom stock. /s/ Sarah Cammarata, under Power of Attorney dated September 16, 2010 from Michael W. Lamach 2013-04-19