Amphenol

APH on NYSE. Amphenol sells connectors, cables, antennas and sensors to companies that make electronics. Market value $107.6bn.

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
4.4%fair

For every $100 of what the whole company costs, it produced $4.38 of spare cash in the past 12 months. A savings account pays about $4.

Price to profit
past 12 months to June 2026
15.5×full

You pay 15.5 years of operating profit for the business. The average large US company costs around 18.

Return on capital
five annual reports to December 2025
18.7%five-year median

Each dollar kept in the business earns 19 cents a year. Above 10 is good.

Quality score: 98 of 100. Price score: 77 of 100. Our list needs 70 on quality and 60 on price.

$87.27 a share, 48% above its 1-year low

Over the past year the price has ranged from $59.01 to $89.26.

Dividend: 0.7% a year

Paid every year for at least 5 years

Payouts have jumped around in recent years, so this may not repeat.

Prices from Monday’s close (5 October).

Five years of cash, in billions

1.2
1.8
2.2
2.1
4.4
4.7
2021202220232024202512 monthsto Jun '26
Revenue
$10.9bn$12.6bn$12.6bn$15.2bn$23.1bn
Operating margin
19.4%20.5%20.4%20.7%25.4%
Debt to equity
0.760.650.520.701.16
Shares outstanding
0.60bn0.60bn1.21bn1.22bn1.23bn

Health checks

  • Free cash flow positive5 of 5 years
  • Accounting looks honest (Beneish)Nothing unusual
  • Financial strength (Piotroski)6 of 9
  • Profit backed by cash (accruals)Yes
  • Debt1.16× equity
  • Revenue growth, five yearsStrong, 21.9% a year
  • Buying back its own sharesNo, 107% more shares since 2021

The quarter to June 2026

How the business did, compared with the same quarter a year earlier.

  • Sales: $8.8 billion last quarter, up 55% on a year ago.
  • Profit: $1.8 billion, up 62% on a year ago.
  • It keeps 27 cents of each $1 of sales as operating profit, up from 22 cents a year earlier.
  • Spare cash over the past 12 months: $4.7 billion, up from $2.8 billion.
  • 1% more shares than a year ago. Each share owns a bit less of the company.
  • Debt is $14.1 billion more than cash, up from $4.9 billion a year ago.
  • Sales grew on a year ago in each of the last 4 quarters.
Sales by quarter
Sales by quarter
Quarter toAmount
September 2024$4.0bn
December 2024$4.3bn
March 2025$4.8bn
June 2025$5.7bn
September 2025$6.2bn
December 2025$6.4bn
March 2026$7.6bn
June 2026$8.8bn
Profit by quarter
Profit by quarter
Quarter toAmount
September 2024$604m
December 2024$746m
March 2025$738m
June 2025$1.1bn
September 2025$1.2bn
December 2025$1.2bn
March 2026$933m
June 2026$1.8bn

From the company's quarterly reports to the SEC.

Dates

Next results (estimated)
28 October 2026
Last annual report (10-K)
11 February 2026
Next quarterly (estimated, 10-Q)
30 October 2026

Who owns it

14 long-term investors we follow own it, unchanged from 14 last quarter. 2,323 funds in all.

Jun '25
Dec '25
Jun '26

Sold out this quarter

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

In the last 12 months, 1 insider bought $1m of shares on the open market. 8 sold $512m.

  • Silverman David M
    EVP, Human Resources
    Sold
    Date
    5 August 2026
    Shares
    120,000
    Price
    $174.24
    Value
    $21m
  • Lampo Craig A
    EVP& CFO
    Sold
    Date
    4 August 2026
    Shares
    193,200
    Price
    $167.31
    Value
    $32m
  • D'AMICO LANCE E
    EVP, Secretary & GenCounsel
    Sold
    Date
    3 August 2026
    Shares
    100,000
    Price
    $161.90
    Value
    $16m
  • NORWITT RICHARD ADAM
    President & CEO, Director
    Sold
    Date
    31 July 2026
    Shares
    686,104
    Price
    $161.76
    Value
    $111m
  • NORWITT RICHARD ADAM
    President & CEO, Director
    Sold
    Date
    5 May 2026
    Shares
    17,500
    Price
    $143.21
    Value
    $3m
  • NORWITT RICHARD ADAM
    President & CEO, Director
    Sold
    Date
    4 May 2026
    Shares
    52,203
    Price
    $142.04
    Value
    $7m
  • NORWITT RICHARD ADAM
    President & CEO, Director
    Sold
    Date
    1 May 2026
    Shares
    61,072
    Price
    $143.90
    Value
    $9m
  • Lampo Craig A
    Executive VP & CFO
    Sold
    Date
    18 February 2026
    Shares
    100,000
    Price
    $149.98
    Value
    $15m
  • D'AMICO LANCE E
    See Remarks
    Sold
    Date
    18 February 2026
    Shares
    50,000
    Price
    $149.88
    Value
    $7m
  • NORWITT RICHARD ADAM
    President & CEO, Director
    Sold
    Date
    12 February 2026
    Shares
    608,333
    Price
    $147.25
    Value
    $90m

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 11 Feb 2026, plus the 10-Q filed 31 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.

  • Changes in fiscal and tax policies as well as audits and examinations by taxing authorities could impact the Company’s results.

    Already happened
    ​ In 2025, certain of the Company’s subsidiaries based in China received notices from relevant tax authorities challenging certain of the Company’s tax positions taken over up to an eight-year period. Although the Company believes its tax positions are appropriate and is currently discussing the matter with the relevant tax authorities, the Company has recorded a charge of $100.0 million in the fourth quarter of 2025. The $100.0 million charge represents the Company’s current best estimate of the costs that may be incurred to resolve this matter; however, the range of potential costs is estimated to be $100.0 million to approximately $300.0 million. The Company is unable to estimate the timing for resolution of this matter.
    Read more
  • Our business and financial results may be adversely affected by government contracting risks.

    Could happen
    ​ We, as well as some of our customers, are subject to various laws and regulations applicable to parties doing business with the U.S. and other governments, including laws and regulations governing reporting, cybersecurity and procurement obligations, interactions with government officials, performance of government contracts, the use and treatment of government furnished property and the nature of materials used in our products, many of which are complex, frequently changing, and subject to varying interpretations. We may be unilaterally suspended or barred from conducting business with the U.S. and other foreign governments or their suppliers (both directly and indirectly), become subject to fines or other sanctions or prohibited from taking certain actions if we are found to have violated such laws or regulations. For example, under the executive order titled “Prioritizing the Warfighter in Defense Contracting” issued in January 2026, defense contractors designated as underperforming by the Secretary of War are prohibited from conducting stock buybacks and issuing dividends until their performance improves. As a result of the need to comply with these numerous laws and regulations, we are subject to increased risks of governmental investigations, civil fraud actions, criminal prosecutions, whistleblower lawsuits and other enforcement actions. The U.S. laws and regulations to which we are subject include, but are not limited to, the Export Administration Regulations, the Federal Acquisition Regulation, the False Claims Act, International Traffic in Arms Regulations, regulations from the Bureau of Alcohol, Tobacco and Firearms and the FCPA. Moreover, we are subject to a wide range of similar laws and regulations in other countries throughout the world. Although we have compliance programs in place designed to reduce the likelihood of potential violations of these laws and regulations, our employees, contractors, or agents could violate such laws and regulations or our policies and procedures. Failure, or the perceived failure, to comply with applicable requirements also could harm our reputation and our ability to compete for future government contracts or sell commercial equivalent products. Any of these outcomes could result in fines or sanctions and may have a material adverse effect on our business, operations, financial condition, liquidity, and results of operations.
    Read more
  • Changes in fiscal and tax policies as well as audits and examinations by taxing authorities could impact the Company’s results.

    Could happen
    ​ On July 4, 2025, the U.S. federal government enacted the tax and spending bill H.R. 1. This legislation contains changes to previously enacted provisions of the Internal Revenue Code and provides for extensions of certain expiring tax provisions included in the Tax Cuts and Jobs Act. Certain corporate tax provisions in H.R. 1 were enacted with retroactive effect to January 1, 2025. H.R. 1 did not have a material impact on our effective tax rate for the year ended December 31, 2025. The Company continues to evaluate the corporate tax provisions contained within H.R. 1, and the future impact of H.R. 1 depends on several factors, including interpretive regulatory guidance, which has not yet been released.
    Read more
  • The Company has at times experienced difficulties and unanticipated expenses in connection with purchasing and integrating newly acquired businesses.

    Already happened
    ​ The Company has completed numerous acquisitions in recent years, including five in 2025 and two in 2024, some of which are large and complex. Additionally, on January 9, 2026, the Company closed the CommScope acquisition, which is the largest acquisition in the Company’s history. The Company anticipates that it will continue to pursue acquisition opportunities as part of its growth strategy. From time to time, the Company experiences difficulty and unanticipated expenses associated with purchasing and assimilating acquisitions into the Company, and acquisitions do not always perform and deliver the financial benefits expected. In addition, the Company may not be able to close acquisitions as anticipated, or at all. The Company has also experienced challenges at times following the acquisition of a new company or business, including, but not limited to, managing the operations, manufacturing facilities and technology; maintaining and increasing the customer base; retaining the management team; managing the response of business partners and competitors; exposure to new regions and countries, including managing the impact of particular economic, tax, currency, political, legal and regulatory risks associated with specific countries; or retaining key employees, suppliers and distributors. These transactions may also lead to litigation, and in certain limited cases, the Company has pursued indemnification claims against seller(s) of an acquired business or sought recovery under third - party insurance policies for pre-acquisition liabilities, breaches of representations, warranties or covenants or for other reasons provided for in the relevant acquisition agreement or insurance policy. To the extent we pursue indemnification claims against such seller(s) or insurers, such seller(s) or insurers may successfully contest such claims and/or may not have the financial capacity to compensate us for such claims, or such claims may otherwise be difficult or impractical to enforce. We cannot predict or guarantee whether, when and to what extent anticipated cost savings, benefits, margin improvements and growth prospects will be achieved from recent or future acquisitions.
    Read more
  • Financing a portion of the consideration of the CommScope acquisition resulted in an increase in the Company’s debt and interest expense, which could adversely affect the Company’s results of operations, cash flows and financial condition.

    Financing a portion of the consideration of the CommScope acquisition resulted in a significant increase in the Company’s debt. This increase in debt requires a larger portion of the Company’s cash flow to be dedicated to the payment of principal and interest on its debt, which could, among other things, prevent the Company from carrying out capital spending that is necessary or important to the Company’s growth strategy and reduce our flexibility to respond to changing business and economic conditions. Further, the amount of cash required for the payment of principal and interest on the increased debt, and thus the demands on the Company’s capital resources, have increased. More specifically, the Company expects interest expense, net of interest income, to increase from $367.8 million in 2025 to approximately $800.0 million in 2026. In addition, the Company may incur additional debt in the future that could further exacerbate these risks, any of which could adversely affect the Company’s results of operations, cash flows and financial condition.
    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.