Armstrong World Industries, Inc. (AWI)

Highly Crowded

Held by 444 of 5,944 reporting institutions (96th percentile) — extremely crowded.

Data as of Q1 2026

Institutional Ownership

94.70%

QoQ Change

N/A

Total Value

$6.4T

Shares Outstanding

42.7M

Crowding AnalysisHighly Crowded

Holders444of 5,944

Avg: 68

Uncrowded96th percentileCrowded

Institutional Activity

Buy/Sell Ratio0.8x

90th percentile

232 buying291 selling

+64

New

-111

Closed

-921,130

Net shares

Holding Period Distribution

estimate

Median: 3 QAvg: 3.3 QHolders: 444

Ownership Concentration

Top 5: 30.9%Top 10: 44.2%

BlackRock,12.9%

VANGUARD PORTFOLIO MANAGEMENT5.5%

VANGUARD CAPITAL MANAGEMENT4.8%

LONDON CO OF VIRGINIA4.3%

STATE STREET3.5%

Others (439)69.1%

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Conviction-Weighted Ownership

Median weight: 0.05%Avg weight: 0.30%Max: 1.75%High conviction (>1%): 1

BlackRock,

VANGUARD PORTFOLIO MANAGEMENT

VANGUARD CAPITAL MANAGEMENT

LONDON CO OF VIRGINIA

STATE STREET

BANK OF MONTREAL /CAN/

AQR CAPITAL MANAGEMENT

FULLER & THALER ASSET MANAGEMENT,

GEODE CAPITAL MANAGEMENT,

KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT

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Whale Moves Timeline (8 Quarters)

Biggest dollar-value position changes among top 10 holders

NEWVANGUARD PORTFOLIO MANAGEMENT$368M2.2M shr

NEWVANGUARD CAPITAL MANAGEMENT$316M1.9M shr

SOLDKAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT$36M221K shr

BOUGHTAQR CAPITAL MANAGEMENT$25M158K shr

SOLDLONDON CO OF VIRGINIA$24M143K shr

NEWBANK OF MONTREAL /CAN$244M1.3M shr

NEWAQR CAPITAL MANAGEMENT$184M961K shr

SOLDLONDON CO OF VIRGINIA$51M269K shr

SOLDKAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT$15M78K shr

BOUGHTGEODE CAPITAL MANAGEMENT$12M62K shr

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Institutional Trends (8 Quarters)

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Institutional Holders

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