Intuitive Surgical
ISRG on Nasdaq. Intuitive Surgical sells machines, instruments, and accessories for surgery to hospitals and doctors. Market value $143.6bn.
Price checks use the past 12 months to June 2026. Quality checks use five annual reports, the latest for the year to December 2025.
We can't read total debt from the filing, so debt is left out.
Should I look at this?
Good business, but not cheap right now
Why it could be worth it
What to watch out for
See cheaper Health care stocks on the list
This is not advice. Check the numbers below.
For every $100 of what the whole company costs, it produced $2.25 of spare cash in the past 12 months. A savings account pays about $4.
The filings do not give us enough to work this out.
The filings do not give us enough to work this out.
Quality score: 80 of 100. Price score: 41 of 100. Our list needs 70 on quality and 60 on price.
$404.76 a share, 23% above its 1-year low
Over the past year the price has ranged from $328.57 to $603.88.
Expected to report results Tuesday 20 Oct, after the market closes.
Pays no dividend
Prices from Tuesday’s close (6 October).
Five years of cash, in billions
| Revenue | |||||
| Revenue | $5.7bn | $6.2bn | $7.1bn | $8.4bn | $10.1bn |
| Operating margin | |||||
| Operating margin | 31.9% | 25.3% | 24.8% | 28.1% | 29.3% |
| Debt to equity | |||||
| Debt to equity | n/a | n/a | n/a | n/a | n/a |
| Shares outstanding | |||||
| Shares outstanding | 0.35bn | 0.35bn | 0.36bn | 0.36bn | 0.35bn |
Health checks
- Free cash flow positive5 of 5 years
- Accounting looks honest (Beneish)Not enough data
- Financial strength (Piotroski)7 of 8 checks we could run
- Profit backed by cash (accruals)Yes
- DebtUnknown
- Revenue growth, five yearsStrong, 18.2% a year
- Buying back its own sharesRoughly flat
The quarter to June 2026
How the business did, compared with the same quarter a year earlier.
- Sales: $2.9 billion last quarter, up 19% on a year ago.
- Profit: $818 million, up 24% on a year ago.
- It keeps 31 cents of each $1 of sales as operating profit, up from 29 cents a year earlier.
- Spare cash over the past 12 months: $3.2 billion, up from $2 billion.
- 2% fewer shares than a year ago. Each share owns a bit more of the company.
- Sales grew on a year ago in each of the last 4 quarters.
| Quarter to | Amount |
|---|---|
| September 2024 | $2.0bn |
| December 2024 | $2.4bn |
| March 2025 | $2.3bn |
| June 2025 | $2.4bn |
| September 2025 | $2.5bn |
| December 2025 | $2.9bn |
| March 2026 | $2.8bn |
| June 2026 | $2.9bn |
| Quarter to | Amount |
|---|---|
| September 2024 | $565m |
| December 2024 | $686m |
| March 2025 | $698m |
| June 2025 | $658m |
| September 2025 | $704m |
| December 2025 | $795m |
| March 2026 | $822m |
| June 2026 | $818m |
From the company's quarterly reports to the SEC.
Dates
- Next results (estimated)
- 20 October 2026
- Last annual report (10-K)
- 3 February 2026
- Next quarterly (estimated, 10-Q)
- 20 October 2026
Who owns it
7 long-term investors we follow own it, down from 9 last quarter. 2,247 funds in all.
- GMOJeremy Grantham
- Value
- $488m
- Share of fund
- 1.1%
- First Manhattan Co.First Manhattan partners
- Value
- $970,737
- Share of fund
- <0.1%
| Fund | Value | Share of that fund | Change |
|---|---|---|---|
| GMOJeremy Grantham | $488m | 1.1% | |
| Polen CapitalDan Davidowitz | $178m | 1.5% | Cut |
| Mairs & PowerAndy Adams | $58m | 0.5% | Added |
| Seilern Investment ManagementPeter Seilern | $46m | 5.8% | Added |
| Gotham Asset ManagementJoel Greenblatt | $10m | <0.1% | Added |
| GAMCO InvestorsMario Gabelli | $6m | <0.1% | Added |
| First Manhattan Co.First Manhattan partners | $970,737 | <0.1% |
Sold out this quarter
Largest holders overall
- BlackRock$11.9bn
- Vanguard Capital Management$9.2bn
- State Street$6.4bn
- Invesco$4.7bnAdded
- Price T Rowe Associates$4.5bnCut
- Geode Capital Management$3.4bn
- Capital World Investors$3.1bnCut
- Vanguard Portfolio Management$2.9bn
- Morgan Stanley$2.6bnAdded
- Norges Bank$2.0bnNew
From 13F filings for the quarter ended 30 June 2026.
Big holders and activists
1 investor owns more than 5%.
- Vanguard Capital ManagementPassive investor7.5%Since 31 March 2026
- The Vanguard GroupPassive investorSold down below 5%Since 13 March 2026
| Holder | Stake | Since | |
|---|---|---|---|
Vanguard Capital Management Passive investor | 7.5% | 31 March 2026 | |
The Vanguard Group Passive investor | Sold down below 5% | 13 March 2026 |
From Schedule 13D and 13G filings: anyone owning more than 5% must file one.
What insiders did
No insider bought shares on the open market in the last 12 months. 12 sold $91m, $91m of it under preset trading plans.
- Widman FredrikVP Corporate ControllerSoldunder a preset trading plan
- Date
- 15 September 2026
- Shares
- 1,089
- Price
- $374.44
- Value
- $407,765
- Brosius MarkEVP & Chief Mfg and Supply ChaSoldunder a preset trading plan
- Date
- 11 September 2026
- Shares
- 25
- Price
- $365.79
- Value
- $9,145
- Brosius MarkEVP & Chief Mfg and Supply ChaSoldunder a preset trading plan
- Date
- 10 September 2026
- Shares
- 23
- Price
- $347.66
- Value
- $7,996
- Brosius MarkEVP & Chief Mfg and Supply ChaSoldunder a preset trading plan
- Date
- 9 September 2026
- Shares
- 23
- Price
- $350.20
- Value
- $8,055
- Brosius MarkEVP & Chief Mfg and Supply ChaSoldunder a preset trading plan
- Date
- 8 September 2026
- Shares
- 46
- Price
- $361.23
- Value
- $16,617
- Brosius MarkEVP & Chief Mfg and Supply ChaSoldunder a preset trading plan
- Date
- 21 August 2026
- Shares
- 77
- Price
- $375.57
- Value
- $28,919
- Brosius MarkEVP & Chief Mfg and Supply ChaSoldunder a preset trading plan
- Date
- 20 August 2026
- Shares
- 77
- Price
- $396.37
- Value
- $30,520
- Brosius MarkEVP & Chief Mfg and Supply ChaSoldunder a preset trading plan
- Date
- 19 August 2026
- Shares
- 77
- Price
- $394.26
- Value
- $30,358
- Brosius MarkEVP & Chief Mfg and Supply ChaSoldunder a preset trading plan
- Date
- 18 August 2026
- Shares
- 77
- Price
- $394.00
- Value
- $30,338
- Brosius MarkEVP & Chief Mfg and Supply ChaSoldunder a preset trading plan
- Date
- 17 August 2026
- Shares
- 77
- Price
- $390.67
- Value
- $30,082
| Date | Who | Did | Shares | Price | Value |
|---|---|---|---|---|---|
| 15 September 2026 | Widman Fredrik VP Corporate Controller | Sold under a preset trading plan | 1,089 | $374.44 | $407,765 |
| 11 September 2026 | Brosius Mark EVP & Chief Mfg and Supply Cha | Sold under a preset trading plan | 25 | $365.79 | $9,145 |
| 10 September 2026 | Brosius Mark EVP & Chief Mfg and Supply Cha | Sold under a preset trading plan | 23 | $347.66 | $7,996 |
| 9 September 2026 | Brosius Mark EVP & Chief Mfg and Supply Cha | Sold under a preset trading plan | 23 | $350.20 | $8,055 |
| 8 September 2026 | Brosius Mark EVP & Chief Mfg and Supply Cha | Sold under a preset trading plan | 46 | $361.23 | $16,617 |
| 21 August 2026 | Brosius Mark EVP & Chief Mfg and Supply Cha | Sold under a preset trading plan | 77 | $375.57 | $28,919 |
| 20 August 2026 | Brosius Mark EVP & Chief Mfg and Supply Cha | Sold under a preset trading plan | 77 | $396.37 | $30,520 |
| 19 August 2026 | Brosius Mark EVP & Chief Mfg and Supply Cha | Sold under a preset trading plan | 77 | $394.26 | $30,358 |
| 18 August 2026 | Brosius Mark EVP & Chief Mfg and Supply Cha | Sold under a preset trading plan | 77 | $394.00 | $30,338 |
| 17 August 2026 | Brosius Mark EVP & Chief Mfg and Supply Cha | Sold under a preset trading plan | 77 | $390.67 | $30,082 |
From Form 4 filings: insiders must report trades in their own company's shares within two days.
Warning signs in its filings
Problems the company itself reported to the SEC, in its own words.
None of the warning signs we check for were found.
We look for five warning signs: doubt it can keep going, weak checks on its own accounts, a notice that its past accounts can't be relied on, a change of auditor, and one customer bringing in a big share of sales. We don't check lawsuits, investigations or debt yet.
We checked the auditor's report, internal controls, restatement notices, auditor changes and big customers in the 10-K filed 3 Feb 2026, plus the 10-Q filed 21 Jul 2026 and 6 later 8-Ks.
A 10-K is the yearly report every US company files with the SEC. An 8-K is a short notice of a big event.
What could go wrong
Cheap for a reason is the question the numbers cannot answer.
Whether the price already reflects the risks is what the deep dive is for.
What changed in the risks this year
Companies must list what could hurt them each year. These are the parts that changed since last year’s report.
More generally, several governments, including the U.S., have raised the possibility of policies to induce “re-shoring” of supply chains,…
Could happenMore generally, several governments, including the U.S., have raised the possibility of policies to induce “re-shoring” of supply chains, less reliance on imported supplies, and greater national production. Examples include potential “Buy America” requirements in the U.S. If such steps by local governments triggered retaliation in other markets restricting access to foreign products in purchases by their government-owned healthcare systems, the result may have an adverse impact on our business, financial condition, or result of operations.
Read moreIn the U.S., legislation related to AI technologies has been introduced at the federal level and has been enacted by various states.
Could happenIn the U.S., legislation related to AI technologies has been introduced at the federal level and has been enacted by various states. At the federal level, in January 2025, the Trump administration rescinded an executive order relating to the safe and secure development of AI technologies that was previously implemented by the Biden administration. The Trump administration then issued a new executive order that, among other things, requires certain agencies to develop and submit to the president action plans to “sustain and enhance America’s global AI dominance,” and to specifically review and, if possible, rescind rulemaking taken pursuant to the rescinded Biden executive order. Additionally, in December 2025, the Trump administration’s “Ensuring a National Policy Framework for Artificial Intelligence” Executive Order was signed. This order calls for federal standards and legislation that would preempt conflicting state AI regulations and create a federal litigation task force focused on challenging state AI laws in court. The Trump administration may continue to rescind other existing federal orders and/or administrative policies relating to AI technologies or may implement new executive orders and/or other rule making relating to AI technologies in the future. U.S. states continue to advance a patchwork of AI regulatory frameworks, including general requirements around transparency, risk-management, and accountability for AI technologies. Several states—such as Colorado, California, and Connecticut—have enacted or proposed laws governing high-risk AI uses, including rules that address algorithmic discrimination, impact assessments, and consumer disclosures. A growing subset of these efforts specifically target health-related AI, with states like Illinois and New York adopting provisions that regulate AI used in clinical decision-support, diagnostics, and other health-related functions, often requiring heightened testing, documentation, or oversight. Such additional regulations, and uncertainty around their enforceability, may impact our ability to develop, use, and commercialize AI technologies in the future.
Read moreIn addition, our ability to meet customers’ demands depends, in part, on our ability to timely obtain an adequate delivery of quality…
In addition, our ability to meet customers’ demands depends, in part, on our ability to timely obtain an adequate delivery of quality materials, parts, and components from our suppliers. An information technology systems interruption, including cyberattacks, could adversely affect the ordering, distribution, and manufacturing processes of our suppliers. Furthermore, the prices of commodities and other materials used in our products, which are often volatile and outside of our control, and may be subject to tariffs, could adversely impact our supply. Current supply chain constraints include difficulties in obtaining a sufficient supply of specific component materials impacted by evolving trade requirements and certain subcontract suppliers being operationally challenged to meet our production requirements. For example, in 2025, the Chinese government announced export controls and licensing requirements applicable to certain products containing Chinese-origin rare earth elements and may implement additional controls in the future. Rare earth elements are critical to certain components contained in our products, and China is a predominant producer of these materials. If implemented in their current or a similar form, these measures may require us to obtain export licenses for certain of our products, and we may further experience supply chain disruptions as a result of limited availability of critical materials and minerals due to the restrictions. If such supply chain constraints continue, we could also fail to meet product demand, which would adversely impact our business, financial condition, or results of operations.
Read moreIn addition, the EU regulatory landscape concerning medical devices recently evolved and continues to undergo legislative changes.
Could happenIn addition, the EU regulatory landscape concerning medical devices recently evolved and continues to undergo legislative changes. On May 26, 2021, the EU MDR became applicable and repealed and replaced the EU MDD and the Active Implantable Medical Devices Directive. Unlike directives, which must be implemented into the national laws of the EU member states, regulations are directly applicable (i.e., without the need for adoption of EU member state laws implementing them) in all EU member states and are intended to eliminate current differences in the regulation of medical devices among EU member states. The EU MDR, among other things, is intended to establish a uniform, transparent, predictable, and sustainable regulatory framework across the EU for medical devices and ensure a high level of safety and health while supporting innovation. These requirements are in active implementation and may change as the European Commission adopts additional implementing acts and considers targeted revisions to related medical device rules. In addition, on December 16, 2025, the European Commission published a targeted revision proposal of the EU MDR to address structural issues, certification delays, and burdens on small and medium-sized enterprises (SMEs). The proposal will enter the ordinary legislative procedure and is not expected to be adopted before 2027.
Read moreThe UK is in the process of overhauling its medical device regulatory framework following its departure from the European Union (“EU”).
Could happenThe UK is in the process of overhauling its medical device regulatory framework following its departure from the European Union (“EU”). The UK regulatory framework will apply in Great Britain only, as Northern Ireland continues to follow the EU Medical Devices Regulation (“MDR”). New post-market surveillance requirements took effect on June 16, 2025, while a draft of additional rules governing device classification and pre-market approval pathways are expected to be published in 2026. The divergence of the new UK rules from EU law could adversely affect or delay our ability to obtain approval for our medical device products in the UK. In addition, any delays in implementation, changes in interpretation, or additional requirements under the new UK regime could adversely affect our ability to market and service our products in Great Britain, which could have adverse impacts on our business.
Read more
The deep dive
Everything above is arithmetic on public filings. The deep dive reads the last ten years of annual reports, the proxy statements, and the earnings calls, then argues the case the way Buffett, Klarman, and Hohn would, and checks every claim against the source.
- What the business is worth, as a range, and the margin of safety at today’s price
- Prices to start buying, buy, and buy hard
- The three things that would make this a mistake
- Every number footnoted to the filing it came from
Your first deep dive is free.
Not advice. Numbers on this page come from SEC filings and are updated each night; prices are updated again after the US market closes. The five-year figures are rounded.