What is Intuitive Surgical (ISRG) worth?

On 12 Nov 2026 our base value for Intuitive Surgical is $404.89 a share, 8.0% below its $439.89 close; 0 of 1 valuation methods put it above the price.

Valuation methods

MethodValuevs priceBasis
Discounted cash flow$404.89-8.0%free cash flow $3.60bn, growth 20.45% for 5 years, then fading to 3% over 5 more, discounted at 10.39%; plus net cash $18.48 a share; stress floor $185.50
Exit multiple (P/E)——no exit multiple: the five-year median of 58.9x is 1.7x the 35.3x this name trades at today (limit 1.5x) — the market has re-rated the name, so its own history prices a business it is no longer paid for. The forward PE is not a substitute: it is today's price divided by earnings, and an anchor built from it can only restate the price
Sum of the parts——no sum of the parts: this run holds no segment disclosure for the name
Price to sales——not reached: the cash-flow or earnings methods produced an anchor, so this fallback was not run
Tangible book——used only for lenders, where book value is the business
Price to FFO (REITs)——used only for REITs

How we got this number

Each working is rebuilt by code from the valuation's own figures and checked against the published value.

Discounted cash flow

The discount rate:

Risk-free rate5.13% (10-year US Treasury yield)
Company's own beta1.45 (5 years of monthly returns against the S&P 500; standard error 0.23)
Peer beta0.77 (median of 15 S&P 500 Health Care Equipment companies)
Blend of own and peers1.26 (72% own, 28% peers, weighted by how precisely the company's own beta is measured)
Adjusted beta1.17 (0.67 × 1.26 + 0.33, pulled toward the market's 1.0)
Equity risk premium4.5%
Discount rate = risk-free + adjusted beta × premium10.39%

Free cash flow grows 20.45% a year for 5 years, then fades in equal steps toward 3% over 5 more; each year is discounted by 1 ÷ (1 + rate)^year:

YearGrowthFree cash flowDiscount factorPresent value
Now—$3.60bn——
Year 120.45%$4.33bn0.9058$3.93bn
Year 220.45%$5.22bn0.8205$4.28bn
Year 320.45%$6.29bn0.7433$4.67bn
Year 420.45%$7.57bn0.6733$5.10bn
Year 520.45%$9.12bn0.6099$5.56bn
Year 617.54%$10.72bn0.5525$5.92bn
Year 714.63%$12.29bn0.5004$6.15bn
Year 811.72%$13.73bn0.4533$6.23bn
Year 98.82%$14.94bn0.4106$6.14bn
Year 105.91%$15.83bn0.3720$5.89bn
Terminal value = year-10 cash flow × (1 + 3%) ÷ (10.39% − 3%)$220.43bn
Terminal value in today's money$81.99bn
Present value of years 1–10$53.87bn
Total present value$135.86bn
Shares outstanding351.60m
Cash flows per share = total ÷ shares$386.41
Plus net cash per share$18.48
Value per share$404.89

How the DCF value moves with the discount rate and the starting growth (the middle cell is the published value):

Discount rateGrowth 15.45%Growth 20.45%Growth 25.45%
9.39%$361.71$475.53$623.69
10.39%$310.21$404.89$527.79
11.39%$271.24$351.52$455.45

The same DCF at each beta, starting growth unchanged:

BetaValueDiscount rateDCF value
Company's own beta1.4511.65%$339.73
Peer beta0.778.59%$550.74
Adjusted beta (used)1.1710.39%$404.89
Base value

The base value is the average of the methods kept in it:

MethodValue
Discounted cash flow$404.89

One method is kept, so the base value is its value: $404.89

Targets

Base value $404.89 a share

One-year price simulation: a 10% chance the price is below $291.38 and a 10% chance it is above $718.81 in a year; a 55% chance it is higher than today's $439.89, from 35.05% volatility. The simulation assumes the price drifts up at our discount rate of 10.39% a year.

What the price implies

At $439.89 the price implies free cash flow growing 22.0% a year for five years and then fading toward 3% over five more; its revenue has grown 20.4%.

Base value history

WeekPriceBase value
2 Oct 2026$391.95$149.89
9 Oct 2026$423.96$151.29
16 Oct 2026$426.70$327.58
23 Oct 2026$452.29$402.22
30 Oct 2026$432.01$417.15
6 Nov 2026$452.80$421.50
12 Nov 2026$439.89$404.89

Data as of 12 Nov 2026; financials to 30 Sep 2026. Sources: company filings via EODHD, SEC EDGAR, US Treasury. How these values are computed. Not investment advice.

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