Pentair

PNR on NYSE. Pentair sells water treatment and pumping equipment to homes, businesses, and factories. Market value $8.4bn.

Watch this stockFree. We tell you when something changes.

Price checks use the past 12 months to June 2026. Quality checks use five annual reports, the latest for the year to December 2025.

Should I look at this?

Worth a closer look

Read what could go wrong

This is not advice. Check the numbers below.

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Cash yield
past 12 months to June 2026
8.0%high

For every $100 of what the whole company costs, it produced $7.96 of spare cash in the past 12 months. A savings account pays about $4.

Price to profit
past 12 months to June 2026
12.3×fair

You pay 12.3 years of operating profit for the business. The average large US company costs around 18.

Return on capital
five annual reports to December 2025
12.5%five-year median

Each dollar kept in the business earns 12 cents a year. Above 10 is good.

Quality score: 96 of 100. Price score: 99 of 100. Our list needs 70 on quality and 60 on price.

$52.94 a share, 2% above its 1-year low

Over the past year the price has ranged from $51.76 to $112.81.

Expected to report results Tuesday 20 Oct, before the market opens.

Dividend: 1.9% a year

Paid every year for at least 5 years

Prices from Tuesday’s close (6 October).

Five years of cash, in billions

0.6
0.3
0.5
0.7
0.7
0.7
2021202220232024202512 monthsto Jun '26
Revenue
$3.8bn$4.1bn$4.1bn$4.1bn$4.2bn
Operating margin
16.9%14.4%18.0%19.7%20.5%
Debt to equity
0.370.860.620.460.42
Shares outstanding
0.16bn0.17bn0.17bn0.16bn0.16bn

Health checks

  • Free cash flow positive5 of 5 years
  • Accounting looks honest (Beneish)Not enough data
  • Financial strength (Piotroski)8 of 9
  • Profit backed by cash (accruals)Yes
  • Debt0.42× equity
  • Revenue growth, five yearsSlow, 6.7% 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: $933 million last quarter, down 17% on a year ago.
  • Profit: $129 million, down 13% on a year ago.
  • It keeps 20 cents of each $1 of sales as operating profit, up from 19 cents a year earlier.
  • Spare cash over the past 12 months: $673 million, down from $837 million.
  • 2% fewer shares than a year ago. Each share owns a bit more of the company.
  • Debt is $1.5 billion more than cash, up from $1.3 billion a year ago.
  • Sales grew on a year ago in 3 of the last 4 quarters.
Sales by quarter
Sales by quarter
Quarter toAmount
September 2024$993m
December 2024$973m
March 2025$1.0bn
June 2025$1.1bn
September 2025$1.0bn
December 2025$1.0bn
March 2026$1.0bn
June 2026$933m
Profit by quarter
Profit by quarter
Quarter toAmount
September 2024$140m
December 2024$166m
March 2025$155m
June 2025$149m
September 2025$184m
December 2025$166m
March 2026$172m
June 2026$129m

From the company's quarterly reports to the SEC.

Dates

Next results (estimated)
20 October 2026
Last annual report (10-K)
24 February 2026
Next quarterly (estimated, 10-Q)
27 October 2026

Who owns it

6 long-term investors we follow own it, unchanged from 6 last quarter. 717 funds in all.

Jun '25
Dec '25
Jun '26
Largest holders overall

From 13F filings for the quarter ended 30 June 2026.

Big holders and activists

2 investors own more than 5%.

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. 4 sold $3m, $1m of it under preset trading plans.

  • Rolchigo Philip M.
    EVP & Chief Technology Officer
    Sold
    under a preset trading plan
    Date
    25 February 2026
    Shares
    6,493
    Price
    $103.22
    Value
    $670,207
  • Speetzen Michael T
    Director
    Sold
    Date
    11 February 2026
    Shares
    7,000
    Price
    $99.99
    Value
    $699,930
  • GLENN T MICHAEL
    Director
    Sold
    under a preset trading plan
    Date
    1 December 2025
    Shares
    6,558
    Price
    $104.33
    Value
    $684,196
  • Fishman Robert P
    EVP & Chief Financial Officer
    Sold
    Date
    14 November 2025
    Shares
    7,786
    Price
    $105.42
    Value
    $820,777

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 24 Feb 2026, plus the 10-Q filed 28 Jul 2026 and 9 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.

  • The use by our employees of artificial intelligence tools or technology can adversely impact our business by posing risks to our confidential or proprietary information and could give rise to legal actions or reputational damage, or otherwise adversely affect our business.

    Could happen
    Our workforce may use artificial intelligence tools or technology, which may result in the exposure of our confidential or proprietary information to unauthorized third parties and the misuse of our intellectual property. Use of artificial intelligence tools or technology may also result in claims against us alleging violation of third-party intellectual property rights. Use of artificial intelligence tools or technology may also result in inaccurate results that could cause mistakes in the Company’s decision-making or other business activities, which may have a material adverse impact on our business and results of operations. Further, there is no guarantee that our training and enforcement of procedures governing the use of artificial intelligence will be adequate to safeguard against the unauthorized use of artificial intelligence tools or technology.
    Read more
  • We may use artificial intelligence in our business and in our products, and challenges with properly managing its use could result in reputational harm, competitive harm, and legal liability, and adversely affect our results of operations.

    Could happen
    We are incorporating artificial intelligence solutions into our products, services and features, and we are leveraging artificial intelligence, including generative artificial intelligence and machine learning, in our product development, operations and software programming. Our competitors or other third parties may incorporate artificial intelligence into their products or operational processes more quickly or more successfully than us, which could have a material adverse effect on our competitive position, reputation and results of operations. In addition, there are significant risks involved in developing and deploying artificial intelligence and there can be no assurance that the usage of artificial intelligence will enhance our products or services or be beneficial to our business, including our efficiency or profitability. The rapid evolution of artificial intelligence, including the regulation of artificial intelligence by government or other regulatory agencies, will require significant resources to develop, test and maintain our platforms, offerings, services and features to implement artificial intelligence ethically and minimize any unintended harmful impacts.
    Read more
  • Failure to achieve and maintain a high level of product and service quality and on-time delivery could damage our reputation with customers and negatively impact our results.

    Already happened
    Product and service quality issues could harm customer confidence in our company and our brands. If certain of our product and service offerings do not meet applicable safety standards or our customers’ expectations regarding quality, safety or performance, we could experience lost sales and increased costs and we could be exposed to legal, financial and reputational risks. In addition, a recall or claim could require us to review some or all of our product portfolio to assess whether similar issues are present in other products, which could result in a significant disruption to our business and our results of operations. We have experienced such quality issues in the past and may experience such issues in the future. We cannot be certain that our quality controls and procedures will reveal defects in our products or their raw materials, which may not become apparent until after the products have been placed in use in the market. Accordingly, there is a risk that products will have defects, which could result in loss of sales or delays in market acceptance and require a product recall or field corrective action. Such remedial actions can be expensive to implement and may damage our reputation and customer relationships. We have conducted product recalls and field corrective actions in the past and may do so again in the future. Our ability to compete and generate sales depends in part on our capacity to meet customer demand and ensure that products and services are delivered to the customer on time. If we are unable to manufacture and deliver products to customers on time, we could experience lost sales and increased costs and we could be exposed to legal, financial and reputational risks. The inability to deliver our products to customers on time could also restrict our manufacturing capacity, which could lead to the loss of customers and restrict our ability to grow sales. The failure to address any of the above factors could have a material adverse effect on our business, financial condition, results of operations and cash flows.
    Read more

Read it in the annual report

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
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What a finished deep dive looks like

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.