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Masimo Corporation

0JZ2.L
55
Medical - Specialties · Healthcare
Price
179.96 GBp
+0.02 (+0.01%)
Market Cap
£9.54B
Exchange
London Stock Exchange
Winston Score
55
Winston is curious
A decent business — some strong pillars, some weaker.
Data as of Aug 9, 2026 · filings through Mar 31, 2026

Share count falling — buybacks

7.1% over 4y

The company has reduced its share count over this period, returning value to shareholders through buybacks.

Diluted shares outstanding: 57.7M (2021) → 53.6M (2025)

Masimo Corporation makes medical monitoring devices used in hospitals and clinics around the world. Its most well-known product is a pulse oximeter — a sensor that measures the oxygen level in a patient's blood without breaking the skin. Masimo invented a technology called Measure-Through Motion and Low Perfusion (SET), which works more accurately than older devices even when patients are moving or have poor circulation.

Masimo earns money by selling its monitoring hardware to hospitals and then charging ongoing fees for the disposable sensors and software that go with it — a model that creates recurring revenue. The company operates globally, with a strong presence in the US and growing sales in Europe and Asia, generating roughly $2 billion in annual revenue. Its patented sensor technology gives it a durable competitive edge, but Masimo faces execution risk after acquiring the consumer audio brand Sound United, a move that expanded its cost base and shifted focus away from its core medical business.

Winston Score History

Score breakdown

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Quality

Gross Margin
62.1%
Premium pricing power — 62.1% gross margin
Operating Margin
19.2%
Healthy — 19.2% operating margin
ROCE
6.2%
Weak — 6.2% return on capital

ROIC between 5% and 15%. They earn 5 to 15 cents back per year on every dollar invested.

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Growth

Sales YoY
-21.0%
Shrinking sales (-21.0% YoY)
EPS YoY
N/A
Data not available
EPS Consistency
4/8 quarters
Earnings inconsistent quarter-to-quarter

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Cash Flow

Cash Conversion
307%
Turns 307% of profit into real cash
FCF Margin
13.5%
Converts sales into free cash efficiently (13.5%)

FCF margin between 10% and 20%. Every $100 in sales becomes $10 to $20 in real cash.

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Stability

Debt / Equity
0.58
Conservative — low debt load (0.58)
Interest Cover
10.11x
Comfortably covers interest (10.1x)

Interest coverage above 8. Profits cover interest many times over.

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Valuation

P/E Ratio (TTM)
1.2x
Attractive valuation — P/E 1.2

P/E under 10. The price tag is small relative to last year's profit.

P/E vs Forward
-25.6
SLOWING
Earnings expected to fall — forward P/E higher than today

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Dividends

Not applicable for this business.
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