| 2018-08-07 | ValueAct Holdings, L.P. | Director, 10% Owner, See Remarks | Sell | 1,500,000 | $69.20 | $103,800,000.00 | -21.9% | → |
| 2018-06-06 | Cookson David S | SVP, Americas | Sale+OE | 27,336 | $63.00 | $1,722,168.00 | -30.4% | → |
| 2018-03-12 | ValueAct Holdings, L.P. | Director, 10% Owner, See Remarks | Sell | 2,350,000 | $59.60 | $140,060,000.00 | -25.5% | → |
| 2017-11-22 | Romano Ellen R. | SVP, Human Resources | Sale+OE | 33,087 | $54.68 | $1,809,197.16 | -82.0% | → |
| 2016-11-02 | TEMPLIN ROY W | Director | Buy | 2,670 | $37.16 | $99,221.47 | +124.4% | → |
| 2016-08-15 | McNamara Stephen F | Vice President and Controller | Sale+OE | 2,274 | $45.00 | $102,330.00 | -43.4% | → |
| 2015-08-18 | McNamara Stephen F | Vice President and Controller | Sale+OE | 2,000 | $60.15 | $120,300.00 | -58.5% | → |
| 2015-05-27 | Armstrong World Industries, Inc. Asbestos Personal Injury Settlement Trust | - | Sell | 1,541,940 | $56.03 | $86,394,898.20 | -22.7% | → |
| 2015-05-20 | McNamara Stephen F | Vice President and Controller | Sell | 906 | $56.94 | $51,587.64 | -39.0% | → |
| 2015-02-24 | Armstrong World Industries, Inc. Asbestos Personal Injury Settlement Trust | - | Sell | 2,739,944 | $55.40 | $151,792,897.60 | -28.7% | → |