Armstrong World Industries, Inc.
US ˙ NYSE ˙ US04247X1028

SecurityAWI / Armstrong World Industries, Inc.
InstitutionBessemer Group Inc
Latest Disclosed Ownership46,058 shares
Latest Disclosed Value $ 7,591
Bessemer Group Inc reports 28.32% increase in ownership of AWI / Armstrong World Industries, Inc.

On May 6, 2026 - Bessemer Group Inc filed a 13F-HR form disclosing ownership of 46,058 shares of Armstrong World Industries, Inc. (US:AWI) valued at $7,590,358 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 35,893 shares of Armstrong World Industries, Inc.. This represents a change in shares of 28.32% during the quarter. The current value of the position is $7,145,899 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-06 2026-03-31 13F ARMSTRONG WORLD INDS SC 04247X102 46,058 10,165 28.32 8 16.67 0.0119
2026-02-05 2025-12-31 13F ARMSTRONG WORLD INDS SC 04247X102 35,893 35,672 16,141.18 7 0.0105
2025-11-05 2025-09-30 13F ARMSTRONG WORLD INDS SC 04247X102 221 91 70.00 0 0.0001
2025-08-01 2025-06-30 13F ARMSTRONG WORLD INDS SC 04247X102 130 11 9.24 0 0.0000
2025-04-23 2025-03-31 13F ARMSTRONG WORLD INDS SC 04247X102 119 42 54.55 0 0.0000
2025-02-13 2024-12-31 13F ARMSTRONG WORLD INDS SC 04247X102 77 46 148.39 0 0.0000
2024-11-12 2024-09-30 13F ARMSTRONG WORLD INDS SC 04247X102 31 21 210.00 0 0.0000
2024-08-13 2024-06-30 13F ARMSTRONG WORLD INDS SC 04247X102 10 0 0.00 0 0.0000
2024-08-13 2024-03-31 13F/A-1 ARMSTRONG WORLD INDS SC 04247X102 10 0 0.00 0 0.0000
2024-05-13 2024-03-31 13F ARMSTRONG WORLD INDS SC 04247X102 10 0 0 0.0000
2024-02-09 2023-12-31 13F ARMSTRONG WORLD INDS SC 04247X102 10 0 0.00 0 0.0000
2023-11-13 2023-09-30 13F ARMSTRONG WORLD INDS SC 04247X102 10 -280 -96.55 0 0.0000
2023-08-10 2023-06-30 13F ARMSTRONG WORLD INDS SC 04247X102 290 0 0.00 0 0.0000
2023-05-10 2023-03-31 13F ARMSTRONG WORLD INDS SC 04247X102 290 -279 -49.03 0 0.0000
2023-02-13 2022-12-31 13F ARMSTRONG WORLD INDS SC 04247X102 569 -460 -44.70 0 -100.00 0.0001
2022-11-09 2022-09-30 13F ARMSTRONG WORLD INDS SC 04247X102 1,029 251 32.26 82 41.38 0.0002
2022-08-10 2022-06-30 13F ARMSTRONG WORLD INDS SC 04247X102 778 0 0.00 58 -17.14 0.0001
2022-05-12 2022-03-31 13F ARMSTRONG WORLD INDS SC 04247X102 778 0 0.00 70 -22.22 0.0001
2022-01-27 2021-12-31 13F ARMSTRONG WORLD INDS SC 04247X102 778 778 90 0.0002
2021-11-12 2021-09-30 13F ARMSTRONG WORLD INDS SC 04247X102 0 -455 -100.00 0 -100.00
2021-08-06 2021-06-30 13F ARMSTRONG WORLD INDS SC 04247X102 455 0 0.00 49 19.51 0.0001
2021-05-13 2021-03-31 13F ARMSTRONG WORLD INDS SC 04247X102 455 455 41 0.0001
2017-07-27 2017-06-30 13F ARMSTRONG WORLD INDS SC 04247X102 0 -383 -100.00 0 -100.00
2017-05-12 2017-03-31 13F ARMSTRONG WORLD INDS SC 04247X102 383 383 18 0.0001
2014-11-13 2014-09-30 13F ARMSTRONG WORLD INDS SC 04247X102 0 -39 -100.00 0 -100.00
2014-08-13 2014-06-30 13F ARMSTRONG WORLD INDS SC 04247X102 39 39 2 0.0000
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.