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RS Investment Management
> IRM
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2016 | IRON MOUNTAIN INC | IRM | 0 | -2,145,138 | 0 | -66,021,000 | |
| 03/31/2015 | IRON MOUNTAIN INC | IRM | 0 | -1,627,489 | 0 | -62,919,000 | |
| 12/31/2014 | IRON MOUNTAIN INC | IRM | 1,627,489 | -1,282,359 | 62,919,000 | -32,088,000 | $38.66 |
| 09/30/2014 | IRON MOUNTAIN INC | IRM | 2,909,848 | 764,710 | 95,007,000 | 28,986,000 | $32.65 |
| 06/30/2014 | IRON MOUNTAIN INC | IRM | 3,650,033 | 1,504,895 | 129,387,000 | 63,366,000 | $35.45 |
| 03/31/2014 | IRON MOUNTAIN INC | IRM | 3,802,027 | 535,991 | 104,815,000 | 5,687,000 | $27.57 |
| 12/31/2013 | IRON MOUNTAIN INC | IRM | 3,266,036 | 1,120,898 | 99,128,000 | 33,107,000 | $30.35 |
| 09/30/2013 | IRON MOUNTAIN INC | IRM | 2,485,649 | 116,992 | 67,180,000 | 4,150,000 | $27.03 |
| 06/30/2013 | IRON MOUNTAIN INC | IRM | 2,368,657 | 223,519 | 63,030,000 | -2,991,000 | $26.61 |
| 03/31/2013 | IRON MOUNTAIN INC | IRM | 2,163,150 | 18,012 | 77,793,000 | 11,772,000 | $35.96 |
| 12/31/2012 | IRON MOUNTAIN INC | IRM | 2,145,138 | 231,860 | 66,021,000 | 759,000 | $30.78 |
| 09/30/2012 | IRON MOUNTAIN INC | IRM | 1,913,278 | 335,478 | 65,262,000 | 13,258,000 | $34.11 |
| 06/30/2012 | IRON MOUNTAIN INC | IRM | 1,577,800 | 1,577,800 | 52,004,000 | 52,004,000 | $32.96 |
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