Warren Buffett - Berkshire Hathaway
Holding/activity history for Iron Mountain Inc. (IRM)
| Period | Shares | % of Portfolio | Activity | % Change to Portfolio | Reported Price |
| 2010 Q3 | 0 | 0 | Sell 100.00% | 0.39 | |
| 2010 Q2 | 8,000,000 | 0.39 | Add 2.63% | 0.01 | $22.46 |
| 2010 Q1 | 7,794,800 | 0.42 | Add 11.35% | 0.04 | $27.40 |
| 2009 Q4 | 7,000,000 | 0.28 | Add 107.58% | 0.15 | $22.76 |
| 2009 Q3 | 3,372,200 | 0.16 | $26.66 | ||
| 2009 Q2 | 3,372,200 | 0.20 | $28.75 | ||
| 2009 Q1 | 3,372,200 | 0.18 | $22.17 | ||
| 2008 Q4 | 3,372,200 | 0.16 | $24.73 | ||
| 2008 Q3 | 3,372,200 | 0.12 | $24.41 | ||
| 2008 Q2 | 3,372,200 | 0.14 | $26.55 | ||
| 2008 Q1 | 3,372,200 | 0.13 | Reduce 27.70% | 0.05 | $26.44 |
| 2007 Q4 | 4,663,900 | 0.25 | Reduce 48.45% | 0.23 | $37.02 |
| 2007 Q3 | 9,047,850 | 0.42 | $30.48 | ||
| 2007 Q2 | 9,047,850 | 0.38 | $26.13 | ||
| 2007 Q1 | 9,047,850 | 0.41 | $26.13 | ||
| 2006 Q4 | 9,047,850 | 0.47 | $27.56 |