ONE LEVEL DEEPER
IDXX
Warren Buffett frameworkThe Owner-OperatorBenjamin Graham frameworkThe Value ArchitectMichael Mauboussin frameworkThe Expectations EngineerHoward Marks frameworkThe Cycle WhispererPeter Lynch frameworkThe Everyday Edge

10.4% revenue growth qualifies as fast grower, but PEG of 5.2 and zero insider buying signal the easy gains are history.

cautiousNeutralconviction

This framework sees a fast grower with 10.4% revenue growth and expanding 17% earnings, but the PEG of 5.2 and institutional ownership above 100% suggest the easy money has been made.

THE LENSES
THE CLASSIFICATIONtransitioning

What type of company is this and what should we expect?

TTM revenue growth of 10.4% with Q4'25 EPS growth of 17% on comparable basis
Operating margins stable at 28.9% in Q4'25, generating $1.05 billion FCF
Veterinary diagnostics market leader with 59% Product revenue and 41% Service revenue
Revenue shows 96.9% correlation with inflation, demonstrating pricing power

This framework classifies IDEXX as a fast grower transitioning toward stalwart territory — revenue growth just above 10% threshold but decelerating from higher levels. The veterinary diagnostics focus and inflation correlation provide defensive characteristics unusual for fast growers.

Revenue
THE PEG RATIOexpensive

Is the price reasonable for the growth we're getting?

P/E ratio of 54.6x with earnings growth of 17% yields PEG of 3.2
Using 10-year average earnings growth of 10.5% gives PEG of 5.2
Stock at 70th percentile of 10-year P/E range despite decelerating growth
Market implies 9.32% perpetual growth rate to justify current valuation

Applying this lens shows a PEG far above Lynch's comfort zone of 1.0 — paying 5x the growth rate violates fundamental value principles. The framework would classify this as "paying for the yacht" territory where growth expectations are priced to perfection.

P/E Ratio
THE GROWTH STORYclear

Can you explain the growth in one sentence a child would understand?

"They make the machines and tests that help vets diagnose sick pets"
Product segment (59% of revenue) includes diagnostic instruments and consumables
Service segment (41% of revenue) provides reference lab testing
US market represents 60.7% of revenue, international 39.3%

This framework appreciates the simplicity — everyone understands taking pets to the vet. The recurring nature of diagnostics (instruments need consumables, pets need regular testing) creates a predictable growth story that Lynch would favor.

Revenue by Segment
THE INSTITUTIONAL FOOTPRINTsaturated

Is this overowned by the big money?

Institutional ownership reached 100.6% in Q4'25, up from 90.0% in Q3'25
180 new institutional positions opened in Q4'25 with 74 net additions
Top 5 institutions control 37.7% of shares
Average institutional holding period of 47.4 quarters shows long-term conviction

This framework sees maximum saturation — when institutions own more than 100%, there's literally no one left to buy. Lynch would call this "overowned" and look elsewhere, as the discovery phase ended long ago.

Price Targets
730
low
830
high
792.5
median
784.38
consensus
KEY NUMBERS
VERDICT

Applying this framework reveals a quality fast grower that has graduated to institutional darling status, with a simple story ("pet diagnostics") but a PEG of 5.2 that would make Lynch look elsewhere. The 100.6% institutional ownership confirms what the absent insider buying suggests — the discovery phase ended quarters ago. Would Lynch rather own a boring company at 10x earnings with insiders buying, or this wonderful business at 55x with insiders selling?

This analysis applies Peter Lynch's published investment framework to publicly available financial data. It is not authored by, endorsed by, or affiliated with Peter Lynch. Educational purposes only. Not financial advice.

OTHER PERSPECTIVES
Warren Buffett framework
The Owner-Operator
Leaning Bullish
Benjamin Graham framework
The Value Architect
Leaning Bearish
Michael Mauboussin framework
The Expectations Engineer
Leaning Bearish
Howard Marks framework
The Cycle Whisperer
Bearish
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