What Makes a Business High Quality: Reading the Numbers Behind Superinvestor Holdings

Quality comes before price

Value investors going back to Graham and Buffett keep two questions apart that beginners tend to blur: is this a good business, and is it trading at a good price. A wonderful company bought at too high a price is still a bad investment. A mediocre one bought cheaply enough can work out fine. This guide is only about the first question. Price is its own discipline, and the numbers here say nothing about it.

There is no single 'quality' number. You build a picture from a few angles: how profitable the business is, whether that profit turns into cash, how well it earns on the capital it uses, and how steady all of it looks over time. The figures on Compounder's stock pages come straight from SEC filings, so you can run this read on any holding you find on the site.

Profit margins: the first look at pricing power

Net margin is the share of each dollar of revenue that survives all the way down to profit. It is the quickest read on pricing power. A business that can charge well above what it costs to serve a customer, and keep doing it, posts a high and steady margin. One fighting on price cannot.

The businesses superinvestors cluster in tend to sit at the high end. Take each company's latest full fiscal year, as reported in its 10-K. Visa kept 50.1% of revenue as net profit in the year ended September 30, 2025, and Mastercard 45.6% in calendar 2025. Alphabet ran 32.8%, Moody's 31.9%, and Meta 30.1%, also for calendar 2025. Those are extraordinary numbers, and they are not an accident: a payment network or a ratings franchise takes a small cut of an enormous flow it does not have to fund. Apple, at 26.9% for the year ended September 27, 2025, and Amazon, at 10.8% for calendar 2025, sit lower, which is the nature of selling physical products and running warehouses rather than tollbooths.

Two cautions. Compare margins inside an industry, not across it, because a supermarket and a software company live in different worlds. And read full years and the trend, not one quarter. In the quarter ended June 30, 2026, Alphabet reported net income equal to 94% of its revenue, because $99.0 billion of its $138.8 billion in pretax income came from gains on investments it holds; operating income that quarter was $40.8 billion. That is why the figures here use full fiscal years. A margin that has slid for several years usually means something the latest figure hides.

Free cash flow: does the profit turn into cash?

Accounting profit and cash are not the same thing, and the gap between them tells you a lot about a business. Free cash flow is the cash left after a company pays to run its operations and reinvest in them. FCF margin is that cash as a share of revenue. Buffett's 'owner earnings' is the same instinct: what the owner could actually take out at the end of the year.

Put net margin and FCF margin side by side and the businesses separate. Visa turned 53.9% of its fiscal 2025 revenue into free cash, more than its 50.1% net margin, because it barely spends on physical assets: capital spending was $1.5 billion against $40.0 billion of revenue. Mastercard has the same shape, a 52.3% FCF margin against 45.6% net in 2025. These are capital-light machines. Apple's free cash ran a little below its profit in fiscal 2025, 23.7% against 26.9%. Alphabet is a different case: a 32.8% net margin but an 18.2% FCF margin in 2025, because it is pouring money into data centers and chips. Its capital spending went from $52.5 billion in 2024 to $91.4 billion in 2025. Amazon's FCF margin was 1.1% on the same basis, against a 10.8% net margin, as $131.8 billion of capital spending absorbed almost all of its $139.5 billion in operating cash flow.

A low or negative FCF margin is not automatically a red flag. It can mean a weak business, or a strong one spending hard on its future. Telling those apart is the actual work, and it is why one number is never enough.

Return on capital, and why it misleads

Return on equity asks how much profit a company earns on the money shareholders have left in it. A business that earns high returns on capital and can reinvest at those returns is the closest thing investing has to a compounding machine, which is why the metric sits near the center of quality investing.

It is also the easiest of these numbers to misread, in two ways. Debt and buybacks flatter it: equity is the denominator, so a company that borrows heavily or buys back stock until its equity is thin can show a dazzling return on a shaky base. A high number earned that way is worth less than the same number earned on a fortress balance sheet. And returns have to be read over full years and across a cycle, not from a single quarter. Compounder shows a per-filing figure, so use it as a prompt to pull up the multi-year picture and the debt behind it, not as a verdict on its own.

Reading them together

No single number settles anything, and the interesting cases are the ones where the metrics seem to disagree. Alphabet's free cash flow running at a little more than half its net margin is not a flaw. It is a company in a heavy building phase, and the question is whether that spending pays off later. Berkshire Hathaway shows a low headline return on equity, which mostly reflects an enormous equity base built over decades rather than a weak business. Amazon spent most of its life with little or no free cash flow, by choice.

The reason to look at several metrics is that each one checks the others. A fat margin with no cash behind it, a high return on capital sitting on a pile of debt, a number that looks fine this quarter but has fallen for three years: each of those only shows up when you line the figures up together. Where the site marks data as incomplete or leaves a field blank, that is part of the read too. Treat a gap as a question, not a pass.

What the numbers can't tell you

These figures describe a business as it was on its last filing, up to a few months ago. They say nothing about what comes next. A moat can erode, a new manager can change how capital gets spent, an industry can turn. They also say nothing about price, which is what actually decides your return. A great business is not automatically a great investment. What you pay decides that.

So treat all of this as a way to ask better questions about the companies superinvestors own, not a scorecard that picks them for you. A 13F tells you who holds a stock. These numbers help you judge the business underneath it. What you do with that judgment, and at what price, is yours alone, and none of this is investment advice. Every figure here lives on the stock pages, refreshed each filing, if you want to run the read yourself.

Margin and free-cash-flow figures above are from each company's most recent full fiscal year, as reported in its 10-K and shown on Compounder: Visa, fiscal year ended 2025-09-30; Apple, fiscal year ended 2025-09-27; Alphabet, Meta, Mastercard, Moody's, and Amazon, fiscal year ended 2025-12-31. The single Alphabet quarter cited is from its 10-Q for the period ended 2026-06-30. Figures checked on 2026-10-19. Source: SEC filings via SEC EDGAR.