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AWI

Armstrong World Industries Inc

Company with tickers: AWI

CIK
7431
CUSIP
04247X102
Shares Outstanding
42,678,835
13F Activity (30d)
348 filings 343 filers
Holders: 466
Total Value: $6,977,684,290
Total Shares: 42,340,319
Showing 1–100 of 470 holdings by value · page 1 of 5

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 466 13F filers · Δ vs Dec 31, 2025
Top Holder
12.3%
Jun 2023 → Mar 2026 · range 10.9% – 12.4%
+0.3 pts
Top 5
29.5%
Jun 2023 → Mar 2026 · range 29.5% – 40.6%
−5.2 pts
Top 10
42.2%
Jun 2023 → Mar 2026 · range 42.2% – 55.9%
−4.9 pts
HHI
311
Jun 2023 → Mar 2026 · range 311 – 478
Broadly held −65

Quarterly Activity

vs Dec 31, 2025
New
64
Increased
166
Decreased
177
Sold Out
117
Unchanged
59
Holder count: -53
Institutional value: -17.1%
Shares held: -3.9%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega TWO SIGMA INVESTMENTS, LP +545,857 783,763
Large JONES FINANCIAL COMPANIES LLLP +318,967 321,168
Large Allianz Asset Management GmbH +290,146 433,356
Large ADAGE CAPITAL PARTNERS GP, L.L.C. +287,000 575,000
Mega MILLENNIUM MANAGEMENT LLC +286,618 348,379

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega Capital International Investors −1,545,901 776,092
Mega ALLIANCEBERNSTEIN L.P. −576,327 36,948
Mega Invesco Ltd. −423,818 383,787
Large Allspring Global Investments Holdings, LLC −228,718 198,729
Large KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC −220,698 984,320

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 2,233,389 $368,062,507
Mega VANGUARD CAPITAL MANAGEMENT LLC 1,918,199 $316,119,195
Mid Egerton Capital (UK) LLP 448,036 $73,836,332
Mega VANGUARD FIDUCIARY TRUST CO 269,612 $44,432,057
Mid Junto Capital Management LP 250,438 $41,272,182

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 4,441,765 $848,821,289
Mid TIMUCUAN ASSET MANAGEMENT INC/FL 571,690 $109,249,959
Mega NORGES BANK 563,661 $107,715,617
Mid SurgoCap Partners LP 376,869 $72,019,665
Large Balyasny Asset Management L.P. 209,256 $39,988,821
Filter: New 64 Increased 166 Reduced 177 Sold out 117 Unchanged 59
Showing 100 of 470
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $857,993,289 12.30% 5,206,270
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $368,062,507 5.27% 2,233,389
Mega VANGUARD CAPITAL MANAGEMENT LLC $316,119,195 4.53% 1,918,199
Large LONDON CO OF VIRGINIA $284,010,881 4.07% 1,723,367
Mega STATE STREET CORP $233,176,179 3.34% 1,414,904
Mega BANK OF MONTREAL /CAN/ Bank $201,929,767 2.89% 1,225,302
Mega AQR CAPITAL MANAGEMENT LLC $184,502,991 2.64% 1,119,557
Large FULLER & THALER ASSET MANAGEMENT, INC. $171,615,139 2.46% 1,041,354
Mega GEODE CAPITAL MANAGEMENT, LLC $166,173,113 2.38% 1,008,332
Large KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC $162,215,934 2.32% 984,320
Mega NEUBERGER BERMAN GROUP LLC $150,958,447 2.16% 916,010
Mega DIMENSIONAL FUND ADVISORS LP $138,918,488 1.99% 842,952
Mega CITADEL ADVISORS LLC $131,062,308 1.88% 795,281
Mega TWO SIGMA INVESTMENTS, LP $129,164,142 1.85% 783,763
Mega Capital International Investors $127,899,961 1.83% 776,092
Mid YACKTMAN ASSET MANAGEMENT LP $122,271,217 1.75% 741,937
Large Alyeska Investment Group, L.P. $122,115,646 1.75% 740,993
Large ADAGE CAPITAL PARTNERS GP, L.L.C. $94,760,000 1.36% 575,000
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $88,131,249 1.26% 534,777
Mid Gates Capital Management, Inc. $82,114,566 1.18% 498,268
Mega FMR LLC $75,991,750 1.09% 461,115
Mega MORGAN STANLEY $75,674,671 1.08% 459,191
Mega BANK OF AMERICA CORP /DE/ Bank $75,415,608 1.08% 457,619
Mid Egerton Capital (UK) LLP $73,836,332 1.06% 448,036
Mid Van Berkom & Associates Inc. $73,595,065 1.05% 446,572
Large Allianz Asset Management GmbH $71,417,067 1.02% 433,356
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $63,819,788 0.91% 387,256
Mega Invesco Ltd. $63,248,095 0.91% 383,787
Mega MILLENNIUM MANAGEMENT LLC $57,412,859 0.82% 348,379
Large NATIXIS ADVISORS, LLC $55,352,035 0.79% 335,874
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $53,336,363 0.76% 323,643
Large JONES FINANCIAL COMPANIES LLLP $52,928,486 0.76% 321,168
Mega Bank of New York Mellon Corp Bank $48,042,326 0.69% 291,519
Mid River Road Asset Management, LLC $45,922,508 0.66% 278,656
Mega NORTHERN TRUST CORP Bank $45,656,518 0.65% 277,042
Mega VANGUARD FIDUCIARY TRUST CO Bank $44,432,057 0.64% 269,612
Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. $42,335,635 0.61% 256,891
Mid Junto Capital Management LP $41,272,182 0.59% 250,438
Mega AMERIPRISE FINANCIAL INC $40,619,078 0.58% 246,475
Mega ENVESTNET ASSET MANAGEMENT INC $39,642,310 0.57% 240,548
Mid COOKE & BIELER LP $37,333,792 0.54% 226,540
Mega SCHRODER INVESTMENT MANAGEMENT GROUP $36,958,541 0.53% 224,263
Large TUDOR INVESTMENT CORP ET AL $35,017,528 0.50% 212,485
Mega PRINCIPAL FINANCIAL GROUP INC $34,483,740 0.49% 209,246
Mega AMERICAN CENTURY COMPANIES INC $33,982,584 0.49% 206,205
Large Point72 Asset Management, L.P. $33,862,939 0.49% 205,479
Mega Nuveen, LLC $33,555,092 0.48% 203,611
Mega GOLDMAN SACHS GROUP INC $33,299,981 0.48% 202,063
Large Public Sector Pension Investment Board Pension $32,923,249 0.47% 199,777
Large Allspring Global Investments Holdings, LLC $32,750,538 0.47% 198,729
Mid Harvey Partners, LLC $32,300,800 0.46% 196,000
Large Quantinno Capital Management LP $31,942,030 0.46% 193,823
Mega JPMORGAN CHASE & CO $31,550,462 0.45% 191,447
Mid RICE HALL JAMES & ASSOCIATES, LLC $29,146,033 0.42% 176,857
Mid Global Alpha Capital Management Ltd. $28,715,576 0.41% 174,245
Large Qube Research & Technologies Ltd $27,867,350 0.40% 169,098
Small SOUTHERNSUN ASSET MANAGEMENT, LLC $27,732,214 0.40% 168,278
Large Woodline Partners LP $27,582,411 0.40% 167,369
Mega WELLS FARGO & COMPANY/MN $27,085,374 0.39% 164,353
Mega Amundi $26,703,862 0.38% 162,038
Mid Arbejdsmarkedets Tillaegspension Pension $25,214,235 0.36% 152,999
Mid SG Capital Management LLC $23,548,272 0.34% 142,890
Large Gotham Asset Management, LLC $23,533,275 0.34% 142,799
Large Squarepoint Ops LLC $23,110,728 0.33% 140,235
Mega BNP PARIBAS ARBITRAGE, SA $22,341,606 0.32% 135,568
Mega UBS Group AG $21,721,628 0.31% 131,806
Large SG Americas Securities, LLC Broker-Dealer $21,372,252 0.31% 129,686
Mega DEUTSCHE BANK AG\ Bank $20,713,216 0.30% 125,687
Large VOLORIDGE INVESTMENT MANAGEMENT, LLC $19,997,326 0.29% 121,343
Mid SCOPUS ASSET MANAGEMENT, L.P. $19,776,000 0.28% 120,000
Large RENAISSANCE TECHNOLOGIES LLC $19,561,760 0.28% 118,700
Mid Engineers Gate Manager LP $19,007,043 0.27% 115,334
Mid ALGERT GLOBAL LLC $18,302,852 0.26% 111,061
Mega RHUMBLINE ADVISERS $17,009,337 0.24% 103,212
Large Verition Fund Management LLC $16,910,457 0.24% 102,612
Mega Legal & General Group Plc $16,666,058 0.24% 101,129
Large ING GROEP NV $16,592,558 0.24% 100,683
Mega California Public Employees Retirement System Pension $15,531,576 0.22% 94,245
Large Man Group plc $15,518,720 0.22% 94,167
Large Trexquant Investment LP $15,304,646 0.22% 92,868
Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension $15,138,692 0.22% 91,861
Mega JANE STREET GROUP, LLC $14,897,920 0.21% 90,400
Mega Swiss National Bank Bank $14,057,440 0.20% 85,300
Mega ROYAL BANK OF CANADA Bank $13,383,077 0.19% 81,208
Mega FIRST TRUST ADVISORS LP $13,263,268 0.19% 80,481
Large MARSHALL WACE, LLP $13,104,400 0.19% 79,517
Mid SCHWARTZ INVESTMENT COUNSEL INC $12,854,400 0.18% 78,000
Mega VICTORY CAPITAL MANAGEMENT INC $12,604,068 0.18% 76,481
Large Assenagon Asset Management S.A. $11,951,296 0.17% 72,520
Large IEQ CAPITAL, LLC $11,926,576 0.17% 72,370
Large Caisse de depot et placement du Quebec $11,757,326 0.17% 71,343
Large STIFEL FINANCIAL CORP $11,075,218 0.16% 67,204
Large Janney Montgomery Scott LLC $10,963,320 0.16% 66,525
Large Corient Private Wealth LLC $10,421,292 0.15% 63,236
Large Treasurer of the State of North Carolina $9,852,568 0.14% 59,785
Large PRUDENTIAL FINANCIAL INC $9,397,884 0.13% 57,026
Large LOS ANGELES CAPITAL MANAGEMENT LLC $9,334,601 0.13% 56,642
Large Thrivent Financial for Lutherans $8,577,510 0.12% 52,048
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $8,479,948 0.12% 51,456
Large BANK OF NOVA SCOTIA Bank $8,355,360 0.12% 50,700
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