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AWI · Armstrong World Industries Inc

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Market Cap
$7.33B
Shares
42.26M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 474
Total Value: $6,814,513,737
Total Shares: 42,479,205
Showing 1–100 of 479 holdings by value · page 1 of 5

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 474 13F filers · Δ vs Mar 31, 2026
Top Holder
12.1%
Sep 2023 → Jun 2026 · range 11.1% – 12.4%
+0.0 pts
Top 5
29.2%
Sep 2023 → Jun 2026 · range 29.1% – 40.6%
+0.1 pts
Top 10
41.4%
Sep 2023 → Jun 2026 · range 41.4% – 55.9%
−0.2 pts
HHI
305
Sep 2023 → Jun 2026 · range 304 – 478
Broadly held+1

Quarterly Activity

vs Mar 31, 2026
New
62
Increased
171
Decreased
190
Sold Out
64
Unchanged
51
Holder count: -2
Institutional value: -3.7%
Shares held: -1.1%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 479
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 7431 CUSIP 04247X102 13F (30d) 323 filings 320 filers Visit website Investor relations