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Pieter Slegers — Buying A Forever Winner

A single-name transaction post: $50,000 into S&P Global at a $425 limit, seven days after ranking it #1 on the Best Buys list — with the case restated as five oligopolies that feed each other.
2026-JUL-26 · Compounding Quality (Substack) · Pieter Slegers / Team Compounding Quality · written post (transaction) · read ↗ · transcript · actionable insights
One-line take: the shortest and most consequential post of the batch — the Best Buys #1 pick converted into an order seven days later, which is the clearest evidence in the archive that the monthly list is a live purchase pipeline rather than commentary. The opening test is a durability filter stated as three clauses: the company "was the clear market leader 20 years ago; is still the market leader today; will (probably) still be the market leader in 20 years from now." The differentiator is quantified — "It doesn't operate in just one oligopoly. It operates in five" (Ratings, Indices, Market Intelligence, Commodity Insights, Mobility), each with only 2-3 major competitors, and each strengthening the others: "ratings support index inclusion, indices generate market data, and market intelligence strengthens the company's ecosystem." Quality is carried by three numbers — CAPEX just 1.1% of sales, gross margin 70.5%, net margin 32.8% — and alignment by one: CEO Martina Cheung's pay is "92% performance-based and tied to long-term EPS growth." The valuation block is the mirror image of Eli Lilly three days earlier: forward PE 22.1x against a 27.0x ten-year average (pass), Earnings Growth Model 11.5% (pass), reverse DCF implying only 9.0% FCF growth (pass) — three passes instead of two fails. Execution is disclosed in full: $50,000, limit $425 "a bit under the current stock price" of $426.4, roughly 120 shares.

1. Stocks & names mentioned

One security. The three largest S&P 500 ETFs are referenced by aggregate assets rather than by name, and Interactive Brokers appears only as the execution venue. Research legend: QT Qualtrim · SA Seeking Alpha · STK Stock Analysis. Written post with no timestamps — the At link opens the article.

TickerNameResearchViewWhat he saidAt
SPGIS&P Global Inc.QT · SA · STK · FAPositiveBought — $50,000 at a $425 limit, roughly 120 shares. The durability test opens it: "was the clear market leader 20 years ago; is still the market leader today; will (probably) still be the market leader in 20 years from now," with "+14.4% per year" since 1990 turning $10,000 into $1.4 million. The structural claim is the count: "It doesn't operate in just one oligopoly. It operates in five" — Ratings, Indices, Market Intelligence, Commodity Insights and Mobility, each facing "only 2–3 major competitors," each "protected by network effects, regulatory barriers, and proprietary data," and each reinforcing the rest. Quality: "very capital light: CAPEX equals just 1.1% of sales," gross margin 70.5%, operating margin 43.8%, net margin 32.8%; CEO Martina Cheung's compensation "is 92% performance-based and tied to long-term EPS growth." All three valuation methods agree — forward PE 22.1x vs a 27.0x ten-year average, an Earnings Growth Model return of 11.5%, and a reverse DCF needing "only 9.0% annual free cash flow growth to generate a 10% return… S&P Global should be able to grow more than that."read ↗

Two details to carry forward. First, the seven-day gap between the ranked shortlist and the order is the shortest observable lag in the archive between a published candidate and a purchase — the "we might buy 2 of the 3 companies from our top 3" line on 19 July was a real signal. Second, the position is absent from the fair-value and owner's-earnings tables in the 2 August portfolio update published a week later, which lists 19 holdings without it — presumably a reporting lag in the spreadsheet rather than an unwound trade, but worth flagging.

2. Talking points

The durability filter, stated as three clauses

The record, stated before the case

Five oligopolies, not one

The scale of the index franchise

Capital lightness, quantified

Management alignment as a single number

Three valuations that all pass

The transaction, disclosed

3. In plain English

A jargon-free summary of the thesis behind each argued name. (Renders on each name's consolidated page.)

SPGI — S&P Global Inc. Positive

S&P Global sells the financial world its reference points. It rates the creditworthiness of borrowers, it owns and licenses the S&P 500 and hundreds of other indexes, it sells market data by subscription, it publishes the price benchmarks the commodity trade settles against, and it runs a vehicle-data business. It does not take positions and it does not lend; it charges for being the standard.

The argument for buying it is a counting argument. Most quality businesses have one protected position. This one has five, each with only two or three real competitors, and — the part that matters — each making the others harder to attack. A company that wants an index-linked ETF needs the index; the index business generates data worth selling; the data business makes the ratings relationships stickier. A competitor would have to break in at five points at once.

Two numbers show why that structure is so profitable. It spends barely 1% of its revenue on physical equipment, so almost all of the profit becomes cash available to shareholders rather than being consumed keeping the machine running. And it keeps about 33 cents of every dollar of sales as final profit. The chief executive's pay is 92% dependent on performance and tied to long-term earnings growth, which is the alignment substitute for a founder's shareholding.

The price is the reason it is bought now rather than admired. Three independent checks all say the same thing: the shares trade at 22 times next year's earnings against a ten-year norm of 27; a forward-return model gives about 11.5% a year; and working backwards from today's price, the company only needs to grow its cash flow 9% a year to hand shareholders 10% — less than it has historically managed. Compare that with the Eli Lilly analysis three days earlier, where the same reverse calculation demanded 18.9% growth and the stock was passed.

The trade is disclosed rather than described: $50,000, a limit price of $425 set just under the $426.4 quote, roughly 120 shares. It is the same name that topped the Best Buys list seven days earlier, which makes that monthly list a purchase queue rather than a reading list.


Summary derived from the archived Compounding Quality post (text in transcript.txt) for personal study. Not investment advice. © Compounding Quality / Pieter Slegers for source material.