Armstrong World Industries, Inc.
US ˙ NYSE ˙ US04247X1028

SecurityAWI / Armstrong World Industries, Inc.
InstitutionAmalgamated Bank
Latest Disclosed Ownership13,731 shares
Latest Disclosed Value $ 2,263
Amalgamated Bank reports 0.76% decrease in ownership of AWI / Armstrong World Industries, Inc.

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 13,731 shares of Armstrong World Industries, Inc. (US:AWI) valued at $2,262,869 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 13,836 shares of Armstrong World Industries, Inc.. This represents a change in shares of -0.76% during the quarter. The current value of the position is $2,130,365 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-08 2026-03-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 13,731 -105 -0.76 2 0.00 0.0173
2026-02-05 2025-12-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 13,836 -201 -1.43 3 0.00 0.0191
2025-10-29 2025-09-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 14,037 158 1.14 3 0.00 0.0197
2025-08-04 2025-06-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 13,879 23 0.17 2 100.00 0.0174
2025-04-25 2025-03-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 13,856 -487 -3.40 2 -50.00 0.0167
2025-02-04 2024-12-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 14,343 -232 -1.59 2 100.00 0.0166
2024-10-30 2024-09-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 14,575 -2,308 -13.67 2 0.00 0.0158
2024-08-12 2024-06-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 16,883 -2,833 -14.37 2 -50.00 0.0163
2024-04-23 2024-03-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 19,716 -2,322 -10.54 2 0.00 0.0209
2024-02-06 2023-12-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 22,038 14,435 189.86 2 0.0173
2023-11-08 2023-09-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 7,603 315 4.32 1 0.0047
2023-08-11 2023-06-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 7,288 -1,257 -14.71 1 0.0043
2023-05-02 2023-03-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 8,545 -3,981 -31.78 1 0.0052
2023-02-10 2022-12-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 12,526 2,915 30.33 1 -100.00 0.0077
2022-11-09 2022-09-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 9,611 28 0.29 761 5.99 0.0073
2022-08-15 2022-06-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 9,583 -52 -0.54 718 -17.19 0.0067
2022-08-25 2022-03-31 13F/A-1 ARMSTRONG WORLD INDUSTRIES COM 04247X102 9,635 336 3.61 867 -19.72 0.0067
2022-06-30 2022-03-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 9,635 336 867 0.0069
2022-02-15 2021-12-31 13F/A-1 ARMSTRONG WORLD INDUSTRIES COM 04247X102 9,299 683 7.93 1,080 31.23 0.0080
2022-02-15 2021-12-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 9,299 683 1,080 0.0080
2021-10-29 2021-09-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 8,616 -492 -5.40 823 -15.76 0.0069
2021-08-16 2021-06-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 9,108 2,339 34.55 977 60.16 0.0078
2021-05-13 2021-03-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 6,769 -532 -7.29 610 12.34 0.0229
2021-02-12 2020-12-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 7,301 -15 -0.21 543 7.95 0.0206
2020-10-30 2020-09-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 7,316 -87 -1.18 503 -12.82 0.0219
2020-08-10 2020-06-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 7,403 -5,421 -42.27 577 -43.32 0.0267
2020-05-13 2020-03-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 12,824 -340 -2.58 1,018 -17.70 0.0249
2020-02-13 2019-12-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 13,164 723 5.81 1,237 2.83 0.0228
2019-11-13 2019-09-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 12,441 1,614 14.91 1,203 14.35 0.0253
2019-08-14 2019-06-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 10,827 764 7.59 1,052 31.66 0.0246
2019-05-15 2019-03-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 10,063 183 1.85 799 38.96 0.0194
2019-02-15 2018-12-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 9,880 3,704 59.97 575 33.72 0.0163
2018-11-14 2018-09-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 6,176 -4,342 -41.28 430 -35.34 0.0106
2018-07-18 2018-06-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 10,518 1,108 11.77 665 25.47 0.0163
2018-05-22 2018-03-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 9,410 591 6.70 530 -0.75 0.0141
2018-02-13 2017-12-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 8,819 490 5.88 534 25.06 0.0144
2017-11-09 2017-09-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 8,329 -6 -0.07 427 11.49 0.0133
2017-08-10 2017-06-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 8,335 1,669 25.04 383 24.76 0.0126
2017-05-12 2017-03-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 6,666 204 3.16 307 13.70 0.0153
2017-02-14 2016-12-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 6,462 836 14.86 270 16.38 0.0122
2016-11-15 2016-09-30 13F/A-1 ARMSTRONG WORLD INDUSTRIES COM 04247X102 5,626 16 0.29 232 -7.20 0.0135
2016-08-16 2016-06-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 5,610 1,006 21.85 250 12.11 0.0145
2016-05-11 2016-03-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 4,604 4,604 0.00 223 0.0217
2016-02-10 2015-12-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 0 -4,530 -100.00 0 -100.00
2015-11-04 2015-09-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 4,530 64 1.43 216 -9.24 0.0227
2015-07-10 2015-06-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 4,466 -655 -12.79 238 -19.05 0.0234
2015-04-22 2015-03-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 5,121 5,121 0.00 294 0.0359
2015-01-29 2014-12-31 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 0 -4,939 -100.00 0 -100.00
2014-11-14 2014-09-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 4,939 63 1.29 277 -1.07 0.0412
2014-08-11 2014-06-30 13F ARMSTRONG WORLD INDUSTRIES COM 04247X102 4,876 4,876 280 0.0422
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.