IDEXX Laboratories, Inc. (IDXX)

Highly Crowded

Held by 1,234 of 5,944 reporting institutions (99th percentile) — extremely crowded.

Data as of Q1 2026

Institutional Ownership

85.58%

QoQ Change

N/A

Total Value

$36.7T

Shares Outstanding

78.9M

Crowding AnalysisHighly Crowded

Holders1,234of 5,944

Avg: 68

Uncrowded99th percentileCrowded

Institutional Activity

Buy/Sell Ratio0.77x

97th percentile

550 buying718 selling

+121

New

-200

Closed

-9,172,871

Net shares

Holding Period Distribution

estimate

Median: 4 QAvg: 4.5 QHolders: 1,234

Ownership Concentration

Top 5: 35.3%Top 10: 46.5%

BlackRock,12.4%

VANGUARD CAPITAL MANAGEMENT7.7%

VANGUARD PORTFOLIO MANAGEMENT5.8%

STATE STREET5.4%

GEODE CAPITAL MANAGEMENT,3.9%

Others (1229)64.8%

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Conviction-Weighted Ownership

Median weight: 0.10%Avg weight: 1.00%Max: 6.42%High conviction (>1%): 2

BlackRock,

VANGUARD CAPITAL MANAGEMENT

VANGUARD PORTFOLIO MANAGEMENT

STATE STREET

GEODE CAPITAL MANAGEMENT,

Invesco

BAMCO

Bank of New York Mellon

Fundsmith LLP

MORGAN STANLEY

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Whale Moves Timeline (8 Quarters)

Biggest dollar-value position changes among top 10 holders

NEWVANGUARD CAPITAL MANAGEMENT$2.9B5.2M shr

NEWVANGUARD PORTFOLIO MANAGEMENT$2.2B3.9M shr

NEWInvesco$943M1.7M shr

SOLDFundsmith LLP$231M410K shr

SOLDMORGAN STANLEY$134M238K shr

SOLDFundsmith LLP$497M734K shr

SOLDBank of New York Mellon$292M432K shr

BOUGHTBlackRock$223M330K shr

BOUGHTSTATE STREET$94M139K shr

BOUGHTGEODE CAPITAL MANAGEMENT$58M86K shr

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Institutional Trends (8 Quarters)

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Institutional Holders

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