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

RNA drug maker grew revenue 85% to $1.1B but trades at 70x earnings — classic Lynch fast grower discovered too late.

cautiousLeaning Bullishconviction

A classic fast grower achieving profitability after years of losses, but the market has already discovered and priced the story to perfection.

THE LENSES
THE CLASSIFICATIONexplosive

What kind of company is this, and what should we expect?

Revenue grew 85% YoY to $1.1B in Q4'25
Net income swung from -$405M in Q3'22 to +$186M in Q4'25
Operating margins ranged from -2.1% to 29.5% across 2025 quarters
R&D spending consumed 227% of operating cash flow in Q4'25

This framework classifies Alnylam as a textbook fast grower — 65.2% TTM revenue growth with volatile but improving profitability. The extreme operating leverage and high R&D intensity are classic biotech fast grower characteristics that Lynch would recognize as both opportunity and risk.

Revenue
THE GROWTH STORYfocused

Can you explain why this company grows in one sentence?

GIVLAARI generates $308M (64% of product revenue)
ONPATTRO generates $173M (36% of product revenue)
Two RNAi therapeutics products drive 100% of disclosed segments
75% revenue from US market, 18% from Europe

The story is crystal clear: "They make RNA drugs that treat rare diseases." Simple enough for an eleven-year-old. But with only two products generating all revenue, this framework would note the concentration risk alongside the clarity.

Revenue by Segment
THE PEG RATIOstretched

Are we paying a fair price for the growth we're getting?

PE ratio at 70.52x in Q4'25
Revenue growth of 85% YoY
Implied PEG of 0.83 (70.52 / 85)
Market implies only 5.16% perpetual growth vs 65.2% trailing

Applying this lens shows a PEG below 1.0, which Lynch would find interesting. However, this framework recognizes the sustainability question — can 85% growth continue? The market's implied 5.16% perpetual growth suggests skepticism.

P/E Ratio
WHERE IN THE STORYdiscovered

Are we early, middle, or late in this growth story?

Just achieved first sustained profitability in 2025
PE ratio at 98th percentile over 10 years
Institutional ownership at 98.7%
385 new institutional positions in last 4 quarters

This framework sees middle-to-late innings. The profitability inflection suggests the story isn't over, but 98.7% institutional ownership and peak valuation multiples indicate the market has fully discovered this company. Lynch preferred finding companies before the institutions piled in.

Operating Margin
KEY NUMBERS
VERDICT

Applying this framework reveals a classic fast grower that Lynch would have loved finding five years ago. The story is simple (RNA drugs for rare diseases), the growth is real (85% YoY), and insiders are buying. But at 70x earnings with 98.7% institutional ownership, the easy money has been made. Is this still a growth story worth owning, or just a growth story worth admiring?

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