Charles Bobrinskoy - Ariel Focus Fund
Holding/activity history for USG Corp. (USG)
| Period | Shares | % of Portfolio | Activity | % Change to Portfolio | Reported Price |
| 2009 Q1 | 0 | 0 | Sell 100.00% | 1.05 | |
| 2008 Q4 | 34,700 | 1.05 | $8.04 | ||
| 2008 Q3 | 34,700 | 2.48 | $25.59 | ||
| 2008 Q2 | 34,700 | 2.73 | Add 5.79% | 0.15 | $29.57 |
| 2008 Q1 | 32,800 | 3.07 | Add 20.59% | 0.52 | $36.83 |
| 2007 Q4 | 27,200 | 2.38 | $35.77 | ||
| 2007 Q3 | 27,200 | 2.42 | $37.54 | ||
| 2007 Q2 | 27,200 | 3.25 | Buy | 3.25 | $49.04 |