Armstrong World Industries, Inc.
US ˙ NYSE ˙ US04247X1028

SecurityAWI / Armstrong World Industries, Inc.
InstitutionTrexquant Investment LP
Latest Disclosed Ownership92,868 shares
Latest Disclosed Value $ 15,304,646
Trexquant Investment LP reports 37.64% increase in ownership of AWI / Armstrong World Industries, Inc.

On May 15, 2026 - Trexquant Investment LP filed a 13F-HR form disclosing ownership of 92,868 shares of Armstrong World Industries, Inc. (US:AWI) valued at $15,304,646 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 67,472 shares of Armstrong World Industries, Inc.. This represents a change in shares of 37.64% during the quarter. The current value of the position is $14,408,470 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 92,868 25,396 37.64 15,305 18.70 0.1100
2026-02-17 2025-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 67,472 16,511 32.40 12,894 29.08 0.1149
2025-11-14 2025-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 50,961 46,082 944.50 9,989 1,161.11 0.1028
2025-08-12 2025-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 4,879 -42,319 -89.66 793 -88.09 0.0089
2025-05-14 2025-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 47,198 47,198 6,649 0.0774
2024-02-09 2023-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -35,333 -100.00 0 -100.00
2023-11-13 2023-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 35,333 -3,909 -9.96 2,544 -11.76 0.0638
2023-08-11 2023-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 39,242 7,026 21.81 2,883 25.58 0.0756
2023-05-15 2023-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 32,216 32,216 2,295 0.0630
2022-08-11 2022-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -11,706 -100.00 0 -100.00
2022-05-13 2022-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 11,706 -12,749 -52.13 1,054 -62.89 0.0495
2022-02-14 2021-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 24,455 24,455 2,840 0.1755
2021-02-11 2020-12-31 13F ARMSTRONG WORLD INDS COM 04247X102 0 -15,524 -100.00 0 -100.00
2020-11-06 2020-09-30 13F ARMSTRONG WORLD INDS COM 04247X102 15,524 6,973 81.55 1,068 60.12 0.0687
2020-08-07 2020-06-30 13F ARMSTRONG WORLD INDS COM 04247X102 8,551 8,551 667 0.0463
2020-02-12 2019-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -6,147 -100.00 0 -100.00
2020-02-18 2019-09-30 13F/A-1 ARMSTRONG WORLD INDS INC COM 04247X102 6,147 -754 -10.93 594 -11.48 0.0513
2019-11-08 2019-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 6,147 -754 594 51,302.2480
2019-08-09 2019-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 6,901 6,901 671 0.0604
2019-02-13 2018-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -11,361 -100.00 0 -100.00
2018-11-09 2018-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 11,361 -4,210 -27.04 791 -19.61 0.0595
2018-08-07 2018-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 15,571 15,571 984 0.0682
2018-05-03 2018-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -17,057 -100.00 0 -100.00
2018-02-08 2017-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 17,057 17,057 1,033 0.1134
2017-02-10 2016-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -7,000 -100.00 0 -100.00
2016-11-10 2016-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 7,000 7,000 289 0.0645
2016-05-11 2016-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 0 0 0.0000
2016-02-10 2015-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -10,900 -100.00 0 -100.00
2015-11-02 2015-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 10,900 10,900 0.00 520 0.0448
2015-08-12 2015-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -30,700 -100.00 0 -100.00
2015-05-13 2015-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 30,700 30,700 1,764 0.1801
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.