Pieter Slegers — HEICO: A 186-page Deep Dive
A full investment case on the aerospace aftermarket's serial acquirer, scored 7.8/10 across fifteen metrics — and then declined, because thirteen of the fifteen scores are excellent and the fourteenth, valuation, is a 2.
One-line take: the archive's cleanest example of a published pass. HEICO is described in superlatives — "$10.000 in 1990 would be $13.9 (!) million today," 112+ acquisitions since 1990, 20,000+ FAA-approved replacement parts, a CAGR since its 1986 IPO of +20.6% and a Quality Score of 7.8/10 — and the answer is still no: "We are not buying HEICO at this point in time for Our Portfolio. The main reason? Valuation looks stretched: HEICO's quality is well recognized, so the stock rarely trades at a discount. This leaves little margin of safety." The 15-metric scorecard makes the arithmetic of that decision visible: historical value creation 10/10, capability management 9.5/10, business model / capital intensity / capital allocation / historical growth / outlook all 9/10 — and valuation 2/10, at a forward PE of 53.7x against a 10-year average of 46.9x (the prose says 57x; the Fiscal.ai onepager says 57.3x versus a 50.3x ten-year average), with a reverse DCF demanding 21.4% annual FCF growth to justify the price. The one genuinely low qualitative score is Main risks at 5/10: "too dependant on the Mendelsons," and a single part failure in an aircraft "could cause massive reputation damage."
1. Stocks & names mentioned
One security. TransDigm appears only as the "main peer" line on the Fiscal.ai onepager and Boeing/Airbus/Embraer only inside the PDF's industry chart — neither is analysed here, so neither gets a row. Slow Compounding (Alexander) is the contributing analyst, not a security. Research legend: QT Qualtrim · SA Seeking Alpha · STK Stock Analysis. Written post with no timestamps — the At link opens the article.
| Ticker | Name | Research | View | What he said | At |
|---|
| HEI | HEICO Corporation | QT · SA · STK · FA | Neutral | 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. | read ↗ |
Neutral, not Positive — the same treatment given to Cintas in April: a business written up admiringly and then declined on entry price, with the name kept under active follow-up. Unlike Cintas, no target multiple is stated here, which leaves the pass open-ended.
2. Talking points
The business in one sentence — a tollbooth on flight hours
- "HEICO makes money by selling replacement aircraft parts, electronic components, and other specialized products for the aerospace, defense, medical, and industrial industries. It also grows by acquiring high-quality niche businesses that strengthen its product portfolio."
- The demand mechanism is mechanical rather than commercial: "Every time an aircraft flies, parts wear out and eventually need to be replaced. This makes HEICO a tollbooth on the global aviation industry." Revenue is a function of flight hours, not of new aircraft orders.
- Revenue split from the onepager: Flight Support Group 68.8%, Electronics Technologies Group 31.2%; United States 61.9% of sales, rest of world 38.1%.
The moat is a regulator's approval, not a patent
- "HEICO builds parts for planes. Not just any parts, but parts approved by the FAA. This is the U.S. authority that decides what's safe to fly." The PMA (Parts Manufacturer Approval) route is what lets HEICO make a replacement part the original manufacturer designed.
- The onepager states it as an economics-plus-regulation combination: "Airlines favor Heico for offering parts that are cheaper than the originals yet equally reliable. Strict FAA rules create a high barrier to entry." The customer saves money; the certification keeps competitors out.
- Reinforced by reputation and time — "a decades-long reputation for quality and reliability. High switching costs and long customer relationships" — and by breadth: 20,000+ approved replacement parts.
A serial acquirer with a decentralised model
- "HEICO has successfully completed more than 112 acquisitions since 1990" — 98 subsidiaries per the scorecard — "while allowing each business to operate independently." The Constellation-style structure this hub tracks elsewhere, applied to aerospace components.
- Ownership backs it: "The Mendelson family owns 16.6% of Heico and have taken the lead in 1990" (insiders ~20% on the onepager), Eric and Victor Mendelson are Co-CEOs and Co-Chairmen, and "400 different employees own more than $1 million worth of Heico stock." The score for capability management is 9.5/10.
The 15-metric Quality Score, and where it actually breaks
- Thirteen of fifteen metrics score 7/10 or better: business model 9, capability management 9.5, sustainable competitive advantage 8.5, industry attractiveness 8, balance sheet 7, capital intensity 9, capital allocation 9, profitability 8, SBC usage 7, historical growth 9, outlook 9, evolution of owner's earnings 8, historical value creation 10.
- Two drag it down. Main risks 5/10 — "too dependant on the Mendelsons" and "a failure of a part in a plane could cause massive reputation damage." And valuation 2/10 — "the company trades at a forward PE of 53.7x (10-year average: 46.9x); reverse DCF: Heico should grow its FCF by 21.4% per year."
- Total: 7.8/10, computed as the plain average of the fifteen. The structure is the point — one catastrophic sub-score is averaged into a respectable total, which is precisely why the buy decision is taken separately from the score.
The numbers behind the qualitative scores
- Capital intensity: CAPEX/sales 1.4% (1.5% on the scorecard), CAPEX/operating cash flow 7.1-9.3% — genuinely capital-light for a manufacturer.
- Capital allocation: ROIC 11.2% and five-year average 11.3%; ROE 16.6%; ROCE 13.8%; return on tangible assets 18.7%; five-year average FCF/net income 110.7%. Note the ROIC is well below the >15% threshold this source normally demands — the goodwill from 112 acquisitions sits in the denominator.
- Balance sheet: interest coverage 9.0x on the onepager (5.2x on the scorecard), net debt/FCF 2.7-3.7x, goodwill/assets 44.4% — more than double the <20% guideline the 15-step worksheet normally applies, which is intrinsic to the acquisitive model.
- Profitability: gross margin 40.1%, profit margin 17.3%, SBC 4.0% of net income (7.0% five-year average).
- Growth: revenue +21.4% over five years and +13.6% over ten; owner's earnings +20.5% and +17.1%; forward outlook revenue +13.4%, EBITDA +15.2%, EPS +13.6%, with a long-term EPS growth estimate of 13.6% (17.9% on the scorecard).
- Value creation: CAGR since the 1986 IPO of +20.6%, "outperform the S&P 500 by a wide margin" — the one perfect 10/10.
The pass, and why it is the interesting part
- The reasoning is about recognition, not about disagreement: "HEICO's quality is well recognized, so the stock rarely trades at a discount. This leaves little margin of safety." A business everyone already knows is excellent is the hardest place to earn a return.
- The reverse DCF is the decisive number: at the current price the shares require 21.4% annual free cash flow growth, against a ten-year owner's-earnings CAGR of 8.7% and a five-year figure of 14.3%. The price is asking for better than the best decade the company has had.
- Even so it is a follow, not a discard: "For now, we will keep following up on HEICO very closely." The FCF yield of 1.8% is the standing measure of how far the price would have to fall.
Sourcing and format
- The 186-page (the post also says 196) investment case was written by Alexander of Slow Compounding and shared with Compounding Quality — the same outside-contributor pattern as the Brookfield deep-dive and the TJ Terwilliger issue three days earlier. The PDF is offered as a download; only the summary, onepager and scorecard sit in the post itself.
- Financial data is credited to Fiscal.ai; portfolio data and execution to Interactive Brokers.
3. In plain English
A jargon-free summary of the thesis behind each argued name. (Renders on each name's consolidated page.)
HEI — HEICO Corporation Neutral
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.
Summary derived from the archived Compounding Quality post (text and transcribed onepager/scorecard in transcript.txt) for personal study. Not investment advice. © Compounding Quality / Pieter Slegers; investment case © Slow Compounding.