Intuitive Surgical (ISRG) Stock Analysis & Winston Score

Intuitive Surgical, Inc. develops, manufactures, and markets products that enable physicians and healthcare providers to enhance the quality of and access to minimally invasive care in the United States and internationally. The company offers the da Vinci Surgical System to enable complex surgery using a minimally invasive approach; and Ion endoluminal system, which extends its commercial offerings beyond surgery into diagnostic procedures enabling minimally invasive biopsies in the lung. It als

Winston Score History

Politician Trades

40 trades / 12mo

22 Congressional buys and 18 sells on ISRG in the last 12 months.

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Growth Profile

For growth stock investors

When traditional metrics don't capture the full picture, these are the signals growth stock investors use instead.

Revenue Growth

+23.0% YoY

YoY Growth Rate

Steady revenue growth

EPS Growth

+18.5% YoY

YoY Growth Rate

Steady EPS growth

R&D Spend

$1.3B/ year

↑ Rising (+15% vs prior year)

13.0% of revenue

Below sector average (18%)

Investing heavily in future products and technology

Insider Activity

0.6%ownership

→ Flat

Insiders holding steady — not selling despite ability to

Cash Position

Cash flow positive

$2.0B cash & investments

Quarterly Free Cash Flow

↑ Burn rate improving

Company generates more cash than it spends — no dilution risk from fundraising

Growth + cash flow

Intuitive Surgical is a rare growth stock that's already generating positive cash flow while growing at 23%. The Winston Score doesn't fully credit this transition from "burner" to "earner."

The Winston Score above measures business quality today. Growth stocks often score lower because they invest in the future rather than maximising current profits. These metrics show what matters most for evaluating that future.

Share count broadly stable

−0.8% over 4y

The share count has stayed roughly flat over this period — little dilution or buyback activity.

Diluted shares outstanding: 365.8M (2021) → 362.7M (2025)

Score breakdown

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Quality

Gross Margin

66.1%

Premium pricing power — 66.1% gross margin

Operating Margin

30.9%

Excellent — 30.9% operating margin

ROCE

4.9%

Weak — 4.9% return on capital

ROIC between 0% and 5%. They earn a few cents back per dollar invested in the business.

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Growth

Sales YoY

+21.4%

Fast-growing sales (21.4% YoY)

EPS YoY

+20.6%

Earnings growing fast (20.6% YoY)

Healthy double-digit earnings growth — what compounders look like.

EPS Consistency

8/8 quarters

Every recent quarter grew earnings vs last year

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Cash Flow

Cash Conversion

113%

Turns 113% of profit into real cash

FCF Margin

26.8%

Converts sales into free cash efficiently (26.8%)

Free cash flow margin above 20%. Out of every $100 in sales, more than $20 is real cash they keep.

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Stability

Debt / Equity

N/A

Data not available

Interest Cover

100.00x

—

Comfortably covers interest (100.0x)

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

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Valuation

P/E Ratio (TTM)

41.3x

Pricey — P/E 41.3

P/E over 35. The market is pricing in heavy, sustained growth.

P/E vs Forward

+11.0

GROWING

Earnings expected to grow meaningfully — cheaper on forward P/E (41.3 → 30.2)

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Dividends

Not applicable for this business.

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