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

10% revenue growth drove 158% operating income growth — a stalwart with fast grower margins hiding in pharma.

cautiousLeaning Bullishconviction

This framework sees a stalwart priced like a slow grower despite accelerating fundamentals — the market hasn't noticed margins doubled.

THE LENSES
THE CLASSIFICATIONexceptional

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

TTM revenue growth of 10% with $36.8B in annual sales
Operating margins expanded from 15.5% in Q4'23 to 39.8% in Q4'25
Revenue diversified across 15+ products with no single product exceeding 21%
FCF grew 10% to $8.1B despite 22% increase in R&D spending

This framework classifies AMGN as a stalwart — a large, established company growing steadily at 10% annually. But the margin expansion suggests it's performing like a fast grower operationally while maintaining stalwart-like revenue growth, creating an unusual hybrid profile.

Operating Margin
THE GROWTH STORYclear

Can I explain why this company grows in one sentence?

Revenue correlates 0.88 with inflation, showing strong pricing power
Operating leverage coefficient of 15.8x — every 1% revenue drives 15.8% operating income growth
R&D spending increased 22% to $7.2B annually, including MariTide obesity drug development
Geographic mix: 71.9% US, 28.1% international in 2025

The growth story is clear: AMGN leverages pricing power in essential medicines to drive operating leverage while reinvesting in pipeline development. This framework appreciates the simplicity — they sell drugs people need at prices that rise with inflation.

Revenue
THE PEG RATIOreasonable

Is the P/E ratio reasonable relative to the growth rate?

P/E ratio of 33.09 at Q4'25
EPS growth visible in trend with acceleration in recent quarters
Operating income grew 158% YoY in Q4'25 on 10% revenue growth
Market implies only 1.43% perpetual growth despite 10% FCF growth

With a P/E of 33 and demonstrated earnings growth acceleration, the PEG appears reasonable if growth continues. This framework notes the market's conservative 1.43% implied growth suggests the multiple could compress if growth merely meets expectations.

P/E Ratio
WHERE IN THE STORYmiddle

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

Operating margins hit 98th percentile over 10 years at 39.8%
ROIC reached 4.98% in Q4'25, highest since Q1'22
Revenue growth steady at 10% but margins still expanding
22% increase in R&D suggests significant pipeline investments ahead

This framework places AMGN in the middle innings — growth is established but margin expansion continues. The heavy R&D investment suggests management sees more innings ahead, though the spectacular margin gains may moderate.

Free Cash Flow
THE INSTITUTIONAL FOOTPRINTcrowded

Is this overowned by institutions or still being discovered?

Institutional ownership at 81.1%, increased 2.5pp in Q4'25
Price targets range from $185 to $432 — 133% spread showing disagreement
549 new institutional positions opened vs 341 closed in last 4 quarters
Capital World added $1.7B while Schwab reduced $496M

This framework sees heavy institutional ownership but meaningful disagreement. The wide target range and divergent whale moves suggest the story isn't fully consensus despite high ownership.

Price Targets
185
low
432
high
355
median
347.73
consensus
KEY NUMBERS
VERDICT

Applying this framework reveals a stalwart performing like a fast grower operationally while the market prices it for slow growth. The 39.8% operating margins and insider buying suggest the business is stronger than the 1.43% growth the market implies. This framework would find AMGN interesting — a boring pharma company with unboring fundamentals. Is the market sleeping on a stalwart that learned to run?

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
Bullish
Howard Marks framework
The Cycle Whisperer
Bullish
Michael Mauboussin framework
The Expectations Engineer
Bullish
Benjamin Graham framework
The Value Architect
Leaning Bullish
Explore
MercadoLibre, Inc.MELIPaychex, Inc.PAYXHoneywell International Inc.HONCopart, Inc.CPRTApple Inc.AAPLNetflix, Inc.NFLX
EDUCATIONAL ONLY · NOT FINANCIAL ADVICEv2