|
2026-03-02 |
2026-02-27 |
B
Purchase
|
Non-Executive Director
|
71,127
+19.8%
477.00
US$1,256,982
|
71,127
+19.8%
|
477.00
|
US$1,256,982
|
|
|
2025-09-11 |
2025-09-11 |
PrS
Proposed sale
|
Former Director
Non-Executive Director
|
39,403
58.98
US$2,787,066
|
39,403
|
58.98
|
US$2,787,066
|
|
|
2025-08-11 |
2025-08-08 |
S
Sale
|
Non-Executive Director
|
67,074
-44.1%
172.61
US$2,506,904
|
67,074
-44.1%
|
172.61
|
US$2,506,904
|
|
|
2025-08-08 |
2025-08-08 |
PrS
Proposed sale
|
Director
Non-Executive Director
|
100
188.78
US$18,878
|
100
|
188.78
|
US$18,878
|
|
|
2025-08-04 |
2025-08-04 |
PrS
Proposed sale
|
Former Director
Non-Executive Director
|
500
189.13
US$94,564
|
500
|
189.13
|
US$94,564
|
|
|
2024-08-06 |
2024-08-06 |
PrS
Proposed sale
|
Director
Non-Executive Director
|
10,332
122.51
US$1,265,775
|
10,332
|
122.51
|
US$1,265,775
|
|
|
2024-08-05 |
2024-08-05 |
PrS
Proposed sale
|
Director
Non-Executive Director
|
5,405
121.70
US$657,793
|
5,405
|
121.70
|
US$657,793
|
|
|
2024-08-02 |
2024-08-02 |
PrS
Proposed sale
|
Director
Non-Executive Director
|
10,000
126.01
US$1,260,075
|
10,000
|
126.01
|
US$1,260,075
|
|
|
2024-08-05 |
2024-08-01 |
S
Sale
|
SVP Human Resources
Officer
|
364
-100.0%
131.49
US$47,862
|
364
-100.0%
|
131.49
|
US$47,862
|
|
|
2024-08-01 |
2024-08-01 |
PrS
Proposed sale
|
Officer
Officer
|
364
131.49
US$47,862
|
364
|
131.49
|
US$47,862
|
|
|
2023-12-29 |
2023-12-28 |
PlS
Planned sale
|
CEO
Executive Director
|
22,914
-6.4%
99.02
US$2,268,866
|
22,914
-6.4%
|
99.02
|
US$2,268,866
|
|
|
2023-12-28 |
2023-12-28 |
PrS
Proposed sale
|
Officer; Director
Executive Director
|
22,914
99.29
US$2,275,131
|
22,914
|
99.29
|
US$2,275,131
|
|
|
2023-02-02 |
2023-02-01 |
PlS
Planned sale
|
SVP Americas
Officer
|
6,835
-15.2%
80.14
US$547,757
|
6,835
-15.2%
|
80.14
|
US$547,757
|
|
|
2022-12-28 |
2022-12-27 |
PlS
Planned sale
|
CEO
Executive Director
|
25,689
-7.2%
68.83
US$1,768,151
|
25,689
-7.2%
|
68.83
|
US$1,768,151
|
|
|
2022-04-21 |
2022-04-21 |
PlS
Planned sale
|
SVP Americas
Officer
|
1,365
-2.9%
95.11
US$129,825
|
1,365
-2.9%
|
95.11
|
US$129,825
|
|
|
2022-03-22 |
2022-03-21 |
PlS
Planned sale
|
SVP, Human Resources
Officer
|
1,000
-7.2%
95.00
US$95,000
|
1,000
-7.2%
|
95.00
|
US$95,000
|
|
|
2021-12-17 |
2021-12-16 |
PlS
Planned sale
|
CEO
Executive Director
|
700
-0.2%
113.65
US$79,558
|
700
-0.2%
|
113.65
|
US$79,558
|
|
|
2021-12-17 |
2021-12-16 |
PlS
Planned sale
|
CEO
Executive Director
|
5,769
-1.8%
112.75
US$650,447
|
5,769
-1.8%
|
112.75
|
US$650,447
|
|
|
2021-12-17 |
2021-12-16 |
PlS
Planned sale
|
CEO
Executive Director
|
4,970
-1.6%
111.66
US$554,929
|
4,970
-1.6%
|
111.66
|
US$554,929
|
|
|
2021-12-17 |
2021-12-16 |
PlS
Planned sale
|
CEO
Executive Director
|
19,909
-5.9%
110.65
US$2,202,907
|
19,909
-5.9%
|
110.65
|
US$2,202,907
|
|
|
2021-06-16 |
2021-06-15 |
PlS
Planned sale
|
SVP, Human Resources
Officer
|
3,000
-17.8%
108.00
US$324,000
|
3,000
-17.8%
|
108.00
|
US$324,000
|
|
|
2021-05-04 |
2021-05-03 |
PlS
Planned sale
|
CFO
Officer
|
5,000
-9.2%
103.86
US$519,300
|
5,000
-9.2%
|
103.86
|
US$519,300
|
|
|
2021-05-04 |
2021-05-03 |
PlS
Planned sale
|
SVP, Gen Cnsl, Compliance
Officer
|
200
-0.4%
105.88
US$21,176
|
200
-0.4%
|
105.88
|
US$21,176
|
|
|
2021-05-04 |
2021-05-03 |
PlS
Planned sale
|
SVP, Gen Cnsl, Compliance
Officer
|
3,042
-6.3%
105.24
US$320,150
|
3,042
-6.3%
|
105.24
|
US$320,150
|
|
|
2021-05-04 |
2021-05-03 |
PlS
Planned sale
|
SVP, Gen Cnsl, Compliance
Officer
|
1,656
-3.3%
104.37
US$172,830
|
1,656
-3.3%
|
104.37
|
US$172,830
|
|
|
2021-04-19 |
2021-04-16 |
PlS
Planned sale
|
SVP, Human Resources
Officer
|
2,000
-10.6%
97.00
US$194,000
|
2,000
-10.6%
|
97.00
|
US$194,000
|
|
|
2021-03-09 |
2021-03-08 |
S
Sale
|
Vice President and Controller
Officer
|
6,649
-29.9%
89.46
US$594,786
|
6,649
-29.9%
|
89.46
|
US$594,786
|
|
|
2021-03-09 |
2021-03-08 |
S
Sale
|
Vice President and Controller
Officer
|
979
-4.2%
87.47
US$85,636
|
979
-4.2%
|
87.47
|
US$85,636
|
|
|
2021-03-09 |
2021-03-08 |
S
Sale
|
Vice President and Controller
Officer
|
4,634
-16.6%
86.65
US$401,520
|
4,634
-16.6%
|
86.65
|
US$401,520
|
|
|
2021-03-09 |
2021-03-08 |
S
Sale
|
Vice President and Controller
Officer
|
3,532
-11.3%
85.83
US$303,153
|
3,532
-11.3%
|
85.83
|
US$303,153
|
|
|
2021-03-09 |
2021-03-08 |
PlS
Planned sale
|
SVP, Human Resources
Officer
|
2,000
-11.3%
92.00
US$184,000
|
2,000
-11.3%
|
92.00
|
US$184,000
|
|
|
2021-02-26 |
2021-02-25 |
S
Sale
|
Vice President and Controller
Officer
|
100
-0.6%
91.62
US$9,162
|
100
-0.6%
|
91.62
|
US$9,162
|
|
|
2021-02-26 |
2021-02-25 |
S
Sale
|
Vice President and Controller
Officer
|
726
-4.4%
90.76
US$65,889
|
726
-4.4%
|
90.76
|
US$65,889
|
|
|
2021-02-26 |
2021-02-25 |
S
Sale
|
Vice President and Controller
Officer
|
1,219
-6.9%
89.49
US$109,088
|
1,219
-6.9%
|
89.49
|
US$109,088
|
|
|
2021-02-26 |
2021-02-25 |
S
Sale
|
Vice President and Controller
Officer
|
9,798
-35.7%
88.07
US$862,958
|
9,798
-35.7%
|
88.07
|
US$862,958
|
|
|
2021-01-15 |
2021-01-14 |
PlS
Planned sale
|
SVP, Gen Cnsl, Compliance
Officer
|
4,897
-10.0%
85.00
US$416,245
|
4,897
-10.0%
|
85.00
|
US$416,245
|
|
|
2020-12-18 |
2020-12-17 |
PlS
Planned sale
|
CEO
Executive Director
|
700
-0.3%
78.67
US$55,070
|
700
-0.3%
|
78.67
|
US$55,070
|
|
|
2020-12-18 |
2020-12-17 |
PlS
Planned sale
|
CEO
Executive Director
|
5,802
-2.1%
77.95
US$452,275
|
5,802
-2.1%
|
77.95
|
US$452,275
|
|
|
2020-12-18 |
2020-12-17 |
PlS
Planned sale
|
CEO
Executive Director
|
12,656
-4.4%
76.92
US$973,492
|
12,656
-4.4%
|
76.92
|
US$973,492
|
|
|
2020-12-16 |
2020-12-15 |
PlS
Planned sale
|
CEO
Executive Director
|
20,094
-7.0%
78.03
US$1,567,991
|
20,094
-7.0%
|
78.03
|
US$1,567,991
|
|
|
2020-12-16 |
2020-12-15 |
PlS
Planned sale
|
CEO
Executive Director
|
11,106
-3.7%
78.90
US$876,301
|
11,106
-3.7%
|
78.90
|
US$876,301
|
|
|
2020-12-04 |
2020-12-03 |
PlS
Planned sale
|
SVP, Gen Cnsl, Compliance
Officer
|
33,423
-42.9%
80.00
US$2,673,840
|
33,423
-42.9%
|
80.00
|
US$2,673,840
|
|
|
2020-11-25 |
2020-11-24 |
PlS
Planned sale
|
SVP, Gen Cnsl, Compliance
Officer
|
300
-0.7%
80.04
US$24,013
|
300
-0.7%
|
80.04
|
US$24,013
|
|
|
2020-09-03 |
2020-09-01 |
PlS
Planned sale
|
SVP, Ceiling Solutions
Officer
|
5,546
-17.2%
74.05
US$410,687
|
5,546
-17.2%
|
74.05
|
US$410,687
|
|
|
2020-09-03 |
2020-09-01 |
PlS
Planned sale
|
SVP, Ceiling Solutions
Officer
|
854
-2.6%
73.33
US$62,620
|
854
-2.6%
|
73.33
|
US$62,620
|
|
|
2020-03-03 |
2020-03-02 |
PlS
Planned sale
|
SVP, Ceiling Solutions
Officer
|
15,865
-39.1%
101.52
US$1,610,631
|
15,865
-39.1%
|
101.52
|
US$1,610,631
|
|
|
2019-05-08 |
2019-05-06 |
S
Sale
|
SVP, Human Resources
|
6,500
-42.2%
88.21
US$573,358
|
6,500
-42.2%
|
88.21
|
US$573,358
|
|
|
2019-05-03 |
2019-05-01 |
S
Sale
|
See Remarks
Non-Executive Director
|
63,910
-100.0%
86.88
US$5,552,501
|
63,910
-100.0%
|
86.88
|
US$5,552,501
|
|
|
2019-05-02 |
2019-05-01 |
S
Sale
|
Vice President and Controller
|
7,778
-42.6%
87.26
US$678,708
|
7,778
-42.6%
|
87.26
|
US$678,708
|
|
|
2019-03-13 |
2019-03-11 |
S
Sale
|
See Remarks
Non-Executive Director
|
456,000
-87.7%
73.25
US$33,402,000
|
456,000
-87.7%
|
73.25
|
US$33,402,000
|
|
|
2019-03-01 |
2019-02-27 |
S
Sale
|
See Remarks
Non-Executive Director
|
1,725,000
-76.8%
73.69
US$127,115,250
|
1,725,000
-76.8%
|
73.69
|
US$127,115,250
|
|
|
2018-11-13 |
2018-11-09 |
S
Sale
|
ValueAct Holdings, L.P.
See Remarks
Non-Executive Director
|
2,980,000
-57.0%
68.15
US$203,087,000
|
2,980,000
-57.0%
|
68.15
|
US$203,087,000
|
|
|
2018-09-24 |
2018-09-24 |
PlS
Planned sale
|
Hershey Mark A
SVP, Gen Cnsl, Compliance
Officer
|
255
-1.3%
70.45
US$17,965
|
255
-1.3%
|
70.45
|
US$17,965
|
|
|
2018-09-24 |
2018-09-21 |
PlS
Planned sale
|
Hershey Mark A
SVP, Gen Cnsl, Compliance
Officer
|
2,217
-10.5%
70.04
US$155,272
|
2,217
-10.5%
|
70.04
|
US$155,272
|
|
|
2018-09-24 |
2018-09-20 |
PlS
Planned sale
|
Hershey Mark A
SVP, Gen Cnsl, Compliance
Officer
|
33,301
-63.8%
70.03
US$2,331,913
|
33,301
-63.8%
|
70.03
|
US$2,331,913
|
|
|
2018-09-05 |
2018-08-31 |
S
Sale
|
ValueAct Holdings, L.P.
See Remarks
Non-Executive Director
Large shareholder
|
100,000
-1.9%
70.03
US$7,003,000
|
100,000
-1.9%
|
70.03
|
US$7,003,000
|
|
|
2018-08-23 |
2018-08-21 |
S
Sale
|
ValueAct Holdings, L.P.
See Remarks
Non-Executive Director
Large shareholder
|
30,000
-0.6%
70.11
US$2,103,300
|
30,000
-0.6%
|
70.11
|
US$2,103,300
|
|
|
2018-08-09 |
2018-08-07 |
S
Sale
|
ValueAct Holdings, L.P.
See Remarks
Non-Executive Director
Large shareholder
|
1,500,000
-21.9%
69.20
US$103,800,000
|
1,500,000
-21.9%
|
69.20
|
US$103,800,000
|
|
|
2018-06-07 |
2018-06-06 |
PlS
Planned sale
|
Cookson David S
SVP, Americas
Officer
|
7,706
-27.0%
63.00
US$485,478
|
7,706
-27.0%
|
63.00
|
US$485,478
|
|
|
2018-06-07 |
2018-06-06 |
PlS
Planned sale
|
Cookson David S
SVP, Americas
Officer
|
7,218
-25.7%
63.00
US$454,734
|
7,218
-25.7%
|
63.00
|
US$454,734
|
|
|
2018-06-07 |
2018-06-06 |
PlS
Planned sale
|
Cookson David S
SVP, Americas
Officer
|
12,412
-37.3%
63.00
US$781,956
|
12,412
-37.3%
|
63.00
|
US$781,956
|
|
|
2018-03-14 |
2018-03-12 |
S
Sale
|
ValueAct Holdings, L.P.
See Remarks
Large shareholder
|
2,350,000
-25.5%
59.60
US$140,060,000
|
2,350,000
-25.5%
|
59.60
|
US$140,060,000
|
|
|
2017-11-22 |
2017-11-22 |
S
Sale
|
Romano Ellen R.
SVP, Human Resources
|
33,087
-82.0%
54.68
US$1,809,197
|
33,087
-82.0%
|
54.68
|
US$1,809,197
|
|
|
2016-11-03 |
2016-11-02 |
B
Purchase
|
TEMPLIN ROY W
Non-Executive Director
|
2,670
+124.4%
37.16
US$99,221
|
2,670
+124.4%
|
37.16
|
US$99,221
|
|
|
2016-08-16 |
2016-08-15 |
PlS
Planned sale
|
McNamara Stephen F
Vice President and Controller
Officer
|
2,274
-43.4%
45.00
US$102,330
|
2,274
-43.4%
|
45.00
|
US$102,330
|
|
|
2015-08-19 |
2015-08-18 |
S
Sale
|
McNamara Stephen F
Vice President and Controller
Officer
|
2,000
-58.5%
60.15
US$120,300
|
2,000
-58.5%
|
60.15
|
US$120,300
|
|
|
2015-05-28 |
2015-05-27 |
S
Sale
|
Armstrong World Industries, Inc. Asbestos Personal Injury Settlement Trust
Large shareholder
|
1,541,940
-22.7%
56.03
US$86,394,898
|
1,541,940
-22.7%
|
56.03
|
US$86,394,898
|
|
|
2015-05-21 |
2015-05-20 |
S
Sale
|
McNamara Stephen F
Vice President and Controller
Officer
|
906
-39.0%
56.94
US$51,588
|
906
-39.0%
|
56.94
|
US$51,588
|
|
|
2015-02-25 |
2015-02-24 |
S
Sale
|
Armstrong World Industries, Inc. Asbestos Personal Injury Settlement Trust
Large shareholder
|
2,739,944
-28.7%
55.40
US$151,792,898
|
2,739,944
-28.7%
|
55.40
|
US$151,792,898
|
|
|
2014-08-13 |
2014-08-12 |
PlS
Planned sale
|
McNamara Stephen F
Vice President and Controller
Officer
|
4,881
-75.0%
53.65
US$261,866
|
4,881
-75.0%
|
53.65
|
US$261,866
|
|
|
2014-07-31 |
2014-07-31 |
B
Purchase
|
ValueAct Holdings, L.P.
Large shareholder
|
275,000
+3.1%
48.73
US$13,400,750
|
275,000
+3.1%
|
48.73
|
US$13,400,750
|
|
|
2014-07-31 |
2014-07-30 |
B
Purchase
|
ValueAct Holdings, L.P.
Large shareholder
|
500,000
+5.9%
49.24
US$24,620,000
|
500,000
+5.9%
|
49.24
|
US$24,620,000
|
|
|
2014-07-31 |
2014-07-29 |
B
Purchase
|
ValueAct Holdings, L.P.
Large shareholder
|
225,000
+2.7%
49.28
US$11,088,000
|
225,000
+2.7%
|
49.28
|
US$11,088,000
|
|
|
2014-07-15 |
2014-07-14 |
PlS
Planned sale
|
McNamara Stephen F
Vice President and Controller
Officer
|
5,000
-75.4%
54.54
US$272,700
|
5,000
-75.4%
|
54.54
|
US$272,700
|
|
|
2014-05-13 |
2014-05-12 |
PlS
Planned sale
|
McNamara Stephen F
Vice President and Controller
Officer
|
5,000
-75.4%
53.15
US$265,750
|
5,000
-75.4%
|
53.15
|
US$265,750
|
|