Armstrong World Industries, Inc.
US ˙ NYSE ˙ US04247X1028

SecurityAWI / Armstrong World Industries, Inc.
InstitutionBokf, Na
Latest Disclosed Ownership13,089 shares
Latest Disclosed Value $ 2,157,067
Bokf, Na ownership in AWI / Armstrong World Industries, Inc.

On May 8, 2026 - Bokf, Na filed a 13F-HR form disclosing ownership of 13,089 shares of Armstrong World Industries, Inc. (US:AWI) valued at $2,157,067 USD as of March 31, 2026. The entity filed a previous 13F-HR on May 11, 2023 disclosing 0 shares of Armstrong World Industries, Inc.. The current value of the position is $1,999,345 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 common 04247X102 13,089 13,089 2,157 0.0254
2023-05-11 2023-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -9,049 -100.00 0 -100.00
2023-02-13 2022-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 9,049 -92 -1.01 621 -14.36 0.0115
2022-11-14 2022-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 9,141 0 0.00 724 5.69 0.0146
2022-08-11 2022-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 9,141 -13 -0.14 685 -16.87 0.0131
2022-05-13 2022-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 9,154 2 0.02 824 -22.48 0.0136
2022-03-11 2021-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 9,152 11 0.12 1,063 21.76 0.0164
2021-11-10 2021-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 9,141 -1,972 -17.74 873 -12.79 0.0150
2021-04-21 2021-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 11,113 1,927 20.98 1,001 46.56 0.0182
2021-02-12 2020-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 9,186 699 8.24 683 16.95 0.0130
2020-10-30 2020-09-30 13F ARMSTRONG WORLD INDS COM 04247X102 8,487 -3,649 -30.07 584 -38.27 0.0128
2020-08-12 2020-06-30 13F ARMSTRONG WORLD INDS COM 04247X102 12,136 4,784 65.07 946 61.99 0.0222
2020-05-13 2020-03-31 13F ARMSTRONG WORLD INDS COM 04247X102 7,352 -600 -7.55 584 -21.82 0.0168
2020-02-12 2019-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 7,952 -1,022 -11.39 747 -13.84 0.0169
2019-11-13 2019-09-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 8,974 -2,561 -22.20 867 -22.66 0.0209
2019-08-14 2019-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 11,535 -1,621 -12.32 1,121 7.27 0.0269
2019-05-15 2019-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 13,156 13,156 1,045 0.0250
2018-08-13 2018-06-30 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -3,755 -100.00 0 -100.00
2018-05-14 2018-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 3,755 0 0.00 211 -7.05 0.0060
2018-02-14 2017-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 3,755 3,755 227 0.0063
2017-05-15 2017-03-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 0 -5,665 -100.00 0 -100.00
2017-02-14 2016-12-31 13F ARMSTRONG WORLD INDS INC COM 04247X102 5,665 5,665 237 0.0078
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.