X0303 4 2009-07-28 0 0001020569 IRON MOUNTAIN INC IRM 0001218784 RYAN VINCENT J SCHOONER CAPITAL 745 ATLANTIC AVENUE BOSTON MA 02111 1 0 0 0 Common Stock, par value, $.01 per share 2009-07-28 4 S 0 94018 30.9492 D 6201361 I See Footnote Common Stock, par value, $.01 per share 2009-07-29 4 S 0 150000 31.8253 D 6051361 I See Footnote Common Stock, par value, $.01 per share 148214 I See Footnote Common Stock, par value, $.01 per share 336616 I See Footnote Common Stock, par value, $.01 per share 9234256 I See Footnote Common Stock, par value, $.01 per share 38371 I See Footnote The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 22, 2009. All shares covered under such plan have now been sold. Price reflected is the weighted-average sale price for shares sold. The range of sale prices for the transactions reported was $30.75 to $31.10 per share. The Reporting Person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, Iron Mountain Incorporated, or a security holder of Iron Mountain Incorporated, full information regarding the number of shares sold at each separate price. Shares held in the Vincent J. Ryan Revocable Trust, dated December 24, 1987. Price reflected is the weighted-average sale price for shares sold. The range of sale prices for the transactions reported was $31.75 to $31.99 per share. The Reporting Person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, Iron Mountain Incorporated, or a security holder of Iron Mountain Incorporated, full information regarding the number of shares sold at each separate price. Shares held in the Carla E. Meyer Three-Year Retained Annuity Trust, dated September 13, 2006. Shares held in the Carla E. Meyer Three-Year Retained Annuity Trust, dated October 29, 2008. Shares held by Schooner Capital Corporation. Shares held by Mr. Ryan's son, Nicholas Ryan. Mr. Ryan disclaims beneficial ownership of these shares. /s/ Ernest W. Cloutier, under Power of Attorney dated June 5, 2008 from Vincent J. Ryan 2009-07-30