In short: The issue's stock pitch, and a new name in this archive. "Diploma makes money by selling essential, high-margin components for industries like aerospace, medical, and industrial machinery. They grow profits through organic sales and by acquiring small specialist businesses with recurring revenue." The framing is a hidden middleman: "When a Boeing engineer needs a specific bolt for a 787, or a hospital needs a sterile valve for an MRI machine, they call a specialist distributor. Diploma owns hundreds of these niche distributors. Each one is tiny, local, and deeply embedded in its supply chain." The acquisition model is spelled out — "they buy family-run businesses at 6-8x earnings, leave the founders in charge, and give them full autonomy" — and so is the pricing mechanism: "they cross-sell products, consolidate purchasing, and raise prices by 3-5% every year. Customers barely notice because these products account for just 0.2% of their total costs." Result: "an incredible 18.9% annual return over the past 34 years" — the Fiscal.ai chart reads LSE:DPLM +38,599.7% from 2 Jan 1992 to 11 May 2026.
Diploma is a British company that owns hundreds of tiny specialist suppliers. Each one sells a narrow range of parts — a particular bolt for an aircraft, a sterile valve for a hospital scanner, seals and wiring for industrial machinery — to customers who cannot easily buy them anywhere else. On its own each of these businesses is too small to interest anybody; owned together, they become a large, very profitable group.
The money is made in two steps. First, Diploma buys family-run suppliers cheaply — six to eight times their annual profits — and leaves the founder running the business with full independence. Then it does three unglamorous things: sells each company's products through the others' customer lists, buys stock centrally so everything costs less, and raises prices 3-5% a year. That last step is the quiet trick. The parts it sells account for roughly two-tenths of one percent of what the customer spends, so a price rise is not worth arguing about, while getting the wrong part shuts a production line. That is pricing power without a brand.
This is the post's own equation made concrete: a business earning a high return on the money it puts to work, with somewhere sensible to keep putting more of it. The result over more than three decades has been a compound annual return of 18.9% and a total gain of roughly 38,600%. No valuation is given here, so treat it as an introduction to a business rather than a buy signal.
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