In short: The scale case for bolt-ons: "HEICO, however, 100 plus acquisitions in this time. So those companies have been enormously successful" — none of them the "big splashy acquisition that's getting all the press."
HEICO makes replacement parts for jet engines and other aerospace and electronic equipment — approved substitutes that airlines can buy more cheaply than the original manufacturer's. It is family-run and has bought more than a hundred small businesses over the years.
Mayer's line is about the sheer count: "HEICO, however, 100 plus acquisitions in this time. So those companies have been enormously successful." The volume is the point. A business that can do a hundred small deals well has built an actual capability — a repeatable process for finding, pricing and absorbing companies — and that capability is itself the moat, in a way a single transformational deal never is.
13:57But there's smaller bolt-ons. Lots of companies have been able to grow sustainably with good returns doing more programmatic smaller acquisitions. And you can think of there like Watsco and Roper of the world, and HEICO, however, 100 plus acquisitions in this time. So those companies have been enormously successful.
In short: Full investment case, Quality Score 7.8/10 — and an explicit pass on price. "HEICO is one of the best compounding businesses in the aerospace industry… It operates a capital-light business with predictable recurring demand. Every time an aircraft flies, parts wear out and eventually need to be replaced. This makes HEICO a tollbooth on the global aviation industry," protected by "FAA-approved products that are difficult to replicate," a decades-long reliability reputation and high switching costs, plus 112+ acquisitions run on a decentralised model. Risks named: PMA parts restricted under some airline contracts, incumbents defending the aftermarket, and cyclical aviation demand. Verdict: "No. We are not buying HEICO at this point in time for Our Portfolio… Valuation looks stretched… The company currently trades at a Forward PE of 57 (!) x. For now, we will keep following up on HEICO very closely." Price $361.7, market cap $50.6bn at the time of writing.
HEICO makes replacement parts for aircraft. Not the engines or the airframe, but the thousands of components that wear out and must be swapped during routine maintenance. Its trick is legal as much as industrial: US regulators allow an independent manufacturer to certify a copy of a part the original maker designed, and HEICO has done that more than twenty thousand times. Airlines buy them because they are cheaper than the original and just as reliable, and they can do so without any regulatory risk because the FAA has already signed off. Getting that approval takes years, which is what keeps newcomers out.
The demand does not depend on airlines ordering new aircraft. It depends on aircraft flying, because flying wears parts out — which is why the deep dive calls it "a tollbooth on the global aviation industry." On top of that HEICO buys small specialist component makers, more than 112 of them since 1990, and leaves each one to run itself. The family that has led it since 1990 still owns roughly a sixth of the company, and some four hundred employees hold more than a million dollars of stock each, so the people running it are owners.
The scorecard shows how good all this is: 9 or better out of 10 for the business model, the management, capital intensity, capital allocation, past growth and outlook, and a perfect 10 for the actual result — a 20.6% annual return since 1986, turning $10,000 in 1990 into $13.9 million.
And Compounding Quality is not buying it. The reason is the last line of the scorecard: valuation, 2 out of 10. The shares change hands at more than fifty times next year's earnings — above their own ten-year average, which was already high — and a reverse discounted-cash-flow calculation (working out what growth the current price is silently assuming) says the buyer needs 21.4% annual growth in cash flow. HEICO has managed 14.3% over five years and 8.7% over ten. In Slegers' words, its "quality is well recognized, so the stock rarely trades at a discount. This leaves little margin of safety."
The other honest mark on the sheet is risk, at 5 out of 10 — the business is very dependent on one family, and a single part failing on an aircraft could do reputational damage no accounting metric would predict. Read this as a name on the follow list rather than the reject pile: an excellent business at an unforgiving price, being watched for the day that changes.
In short: Second-best performer of the month at +29.8%, transcribed from the published table. No commentary. It had been upgraded Sell→Hold on the 7 May list.
In short: UPGRADED Sell → Hold — "aerospace and defense parts manufacturer." Priced at a 30x entry ($178) against a 46.7x forward on 23 April, so the upgrade is a step toward the buy list rather than an endorsement.
In short: "They sell the exact same airplane parts for 30-40% less" — FAA-approved replacements reverse-engineered and priced under the original manufacturers, for airlines that must maintain aircraft regardless. Barriers: years of approvals, hundreds of certified parts, and a 30-year record of zero in-flight part failures that "is priceless and nearly impossible to replicate." Defence is "a whole second business" — components inside targeting systems, satellites and missile guidance. Latest quarter: 14% revenue growth, 15% operating profit growth, helped by older planes flying more and OEMs raising prices. Price: 46.7x forward, "I would only be willing to pay 30x earnings" = $178 against $270. The 5 July deep dive reaches the same conclusion at an even higher multiple.
Aircraft need replacement parts constantly, and normally you buy them from whoever built the engine. HEICO takes those parts apart, makes an identical version, gets it approved by the aviation regulator, and sells it for 30-40% less. Airlines have to maintain their planes whatever the economy is doing, so the demand does not go away.
The barrier to competing is time rather than money. It takes years of regulatory approval and hundreds of certified parts before anyone can be taken seriously as an alternative, and airlines will not gamble on a newcomer — HEICO has thirty years without a single in-flight failure of one of its parts, which is a record you cannot buy. It also has a large defence business, with components buried inside targeting systems, satellites and missile guidance, where nobody swaps a supplier to save a little money.
The business is doing well: revenue up 14% and operating profit up 15% last quarter, helped by older aircraft flying longer and the original manufacturers pushing their own prices up, which makes HEICO's discount worth more each year.
And it is still passed on, because it costs 47 times next year's profits and the stated willingness to pay is 30 times — about $178 against $270. As the write-up puts it, this is a company "that has always been expensive."
In short: Named as one of TransDigm's five key risks, not as an idea. "HEICO makes aircraft replacement parts. It reverse-engineers existing components and sells them under the FAA's Parts Manufacturer Approval (PMA) program. PMA lets companies other than the original maker produce approved spare parts. This reduces the risk of monopolies in the aftermarket. The use of PMA parts has increased in recent years." The sting is in the next line: "keep in mind that most of TransDigm's profits come from the aftermarket." The archive's own HEICO write-up is a separate published pass on valuation.
HEICO appears here as the threat rather than as an idea. It takes existing aircraft parts, works out how to make them itself, and gets them approved under a regulatory route called PMA — Parts Manufacturer Approval — which lets a company other than the original maker sell an approved replacement.
That matters because the replacement market is where TransDigm makes most of its profit, and PMA is the one mechanism that can put a second supplier into a market designed to have only one. The article notes that use of PMA parts has been rising. So the two businesses in this archive that both look like unassailable aviation toll booths are, in part, aimed at each other.
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Verbatim excerpts from the public transcripts (auto-pulled at each mention's timestamp, lightly cleaned). Timestamps link into the video; "source page" opens that commentator's full analysis at this row. Click a mention's header line to expand it (one open at a time). For personal study — not investment advice.