| 2014-03-10 | Sale | Armstrong World Industries, Inc. AWI | 4.11M 7.2454% | $53.80 | $221.12M | -3.75% | ||
| 2013-11-13 | Sale | Armstrong World Industries, Inc. AWI | 10 percent owner | 4.74M 8.7212% | $50.67 | $240M | +7.94% | |
| 2013-09-13 | Sale | Armstrong World Industries, Inc. AWI | 10 percent owner | 5.49M 9.1721% | $51.41 | $282.18M | +3.87% | |
| 2012-12-12 | Sale | Armstrong World Industries, Inc. AWI | 10 percent owner | 355,078 0.6146% | $48.96 | $17.38M | +8.6% | |
| 2012-11-14 | Sale | Armstrong World Industries, Inc. AWI | 10 percent owner | 2.37M 4.0697% | $48.96 | $115.9M | +6.75% |