Armstrong World Industries, Inc.
US ˙ NYSE ˙ US04247X1028

SecurityAWI / Armstrong World Industries, Inc.
InstitutionSquarepoint Ops LLC
Latest Disclosed Ownership140,235 shares
Latest Disclosed Value $ 23,110,728
Squarepoint Ops LLC reports 571.46% increase in ownership of AWI / Armstrong World Industries, Inc.

On May 15, 2026 - Squarepoint Ops LLC filed a 13F-HR form disclosing ownership of 140,235 shares of Armstrong World Industries, Inc. (US:AWI) valued at $23,110,728 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 20,885 shares of Armstrong World Industries, Inc.. This represents a change in shares of 571.46% during the quarter. The current value of the position is $21,485,404 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)
2026-05-15 2026-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 140,235 119,350 571.46 23,111 479.05 0.0272
2026-02-13 2025-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 20,885 -71,110 -77.30 3,991 -77.87 0.0042
2025-11-14 2025-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 91,995 86,801 1,671.18 18,032 2,038.91 0.0181
2025-08-27 2025-06-30 13F/A-1 ARMSTRONG WORLD INDS INC COM 04247X102 5,194 2,798 116.78 844 150.15 0.0009
2025-08-14 2025-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 5,194 2,798 844 0.0009
2025-08-27 2025-03-31 13F/A-1 ARMSTRONG WORLD INDS INC COM 04247X102 2,396 -14,082 -85.46 338 -85.52 0.0004
2025-05-15 2025-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 2,396 -14,082 338 0.0004
2025-02-14 2024-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 16,478 -30,200 -64.70 2,329 -62.05 0.0023
2024-11-14 2024-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 46,678 -79,273 -62.94 6,135 -56.99 0.0096
2024-08-14 2024-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 125,951 79,475 171.00 14,263 147.05 0.0236
2024-05-15 2024-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 46,476 30,742 195.39 5,773 273.42 0.0099
2024-02-14 2023-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 15,734 15,734 1,547 0.0029
2023-11-14 2023-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -7,439 -100.00 0 -100.00
2023-08-14 2023-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 7,439 -16,346 -68.72 546 -67.77 0.0017
2023-05-15 2023-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 23,785 -19,766 -45.39 1,694 -43.29 0.0069
2023-02-14 2022-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 43,551 43,551 2,987 0.0118
2022-11-14 2022-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -33,835 -100.00 0 -100.00
2022-08-15 2022-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 33,835 -38,720 -53.37 2,536 -61.17 0.0141
2022-05-16 2022-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 72,555 51,310 241.52 6,531 164.73 0.0279
2022-02-14 2021-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 21,245 21,245 2,467 0.0065
2021-11-15 2021-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -11,326 -100.00 0 -100.00
2021-08-16 2021-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 11,326 -55,680 -83.10 1,215 -79.87 0.0046
2021-05-17 2021-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 67,006 -34,640 -34.08 6,037 -20.16 0.0354
2021-02-16 2020-12-31 13F ARMSTRONG WORLD INDS COM 04247X102 101,646 -58,663 -36.59 7,561 -31.46 0.0564
2020-11-16 2020-09-30 13F ARMSTRONG WORLD INDS COM 04247X102 160,309 106,164 196.07 11,031 161.34 0.1487
2020-08-14 2020-06-30 13F ARMSTRONG WORLD INDS COM 04247X102 54,145 39,446 268.36 4,221 261.70 0.0683
2020-05-15 2020-03-31 13F ARMSTRONG WORLD INDS COM 04247X102 14,699 5,898 67.02 1,167 41.11 0.0299
2020-02-14 2019-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 8,801 -46,710 -84.15 827 -84.59 0.0049
2019-11-14 2019-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 55,511 -27,237 -32.92 5,368 -33.26 0.0479
2019-08-14 2019-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 82,748 38,741 88.03 8,043 130.13 0.0784
2019-05-15 2019-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 44,007 4,381 11.06 3,495 51.50 0.0370
2019-02-14 2018-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 39,626 -10,449 -20.87 2,307 -33.80 0.0269
2018-11-14 2018-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 50,075 25,928 107.38 3,485 128.37 0.0417
2018-08-14 2018-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 24,147 -7,204 -22.98 1,526 -13.54 0.0202
2018-05-15 2018-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 31,351 31,351 1,765 0.0280
2018-02-14 2017-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -42,089 -100.00 0 -100.00
2017-11-14 2017-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 42,089 31,413 294.24 2,157 339.31 0.0415
2017-08-14 2017-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 10,676 -3,206 -23.09 491 -23.16 0.0097
2017-05-15 2017-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 13,882 4,182 43.11 639 57.78 0.0176
2017-02-14 2016-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 9,700 9,700 0.00 405 0.0166
2016-11-14 2016-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -7,700 -100.00 0 -100.00
2016-08-15 2016-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 7,700 7,700 0.00 301 0.0188
2016-05-16 2016-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -12,700 -100.00 0 -100.00
2016-02-16 2015-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 12,700 -800 -5.93 581 -9.78 0.0637
2015-11-16 2015-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 13,500 13,500 644 0.1607
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.