In short: BUY. ER 16.82% (an 8.0% yield input — special dividends); fwd PE 30.8 vs 34.7 (11.2% under); RDCF 13.7% vs 10.7% (−3.0pp).
In short: Best Buy #2 — "A sole-source aerospace component monopoly generating high profits on selling necessary replacement parts." The single fact carrying the case: "For 80% of their products, they are the only certified manufacturer." Most revenue is aftermarket, on airframes that stay in service 25-30+ years, which is where the margin is. The playbook is spelled out as a repeatable three-step: acquire niche suppliers of parts nobody else can produce; cut costs and tie executive pay to unit profitability; then "Price for Value — airlines cannot legally fly a $100M plane without certified parts." "They've done this hundreds of times, with hundreds of companies" and "there are hundreds more companies out there." Tailwinds cited: record global passenger traffic and Boeing/Airbus backlogs forcing airlines to keep older aircraft flying. No valuation given.
TransDigm makes small, unglamorous aircraft parts — pumps, valves, ignition systems, cockpit hardware. The whole business rests on one fact: for about 80% of what it sells, it is the only manufacturer certified by the regulators to make that part. An airline cannot legally fly without certified parts, and cannot buy them anywhere else.
Most of the money comes not from selling parts to new aircraft but from replacing them for the next twenty-five to thirty years, which is far more profitable. And the company has an unusually explicit method for expanding: buy a small supplier that holds a sole-source certification, cut its costs, tie the managers' pay to the profit of each product line, then raise prices to reflect what the part is really worth to someone with a grounded aeroplane. It has done this hundreds of times and says there are hundreds more targets.
The current tailwind is a shortage elsewhere: Boeing and Airbus cannot deliver new aircraft fast enough, so airlines keep flying old ones, and old aircraft need replacement parts. As with the rest of this month's list, no valuation is offered.
In short: BUY. ER 16.02%, boosted by a 7.2% "dividend yield" — TransDigm's special dividends, which are lumpy rather than recurring, so this is the one expected-return figure on the sheet that should be treated with care. Fwd PE 30.8 against a 34.7 average (11.2% under); the reverse DCF dissents at 15.1% required vs 10.7% expected (−4.4pp). Named Best Buy #2 a week later.
In short: BUY. FV $4,209.9 vs $1,348.5 = 68.0% under; ER 15.5%; fwd PE 30.8 against 34.7 (11.2% under); RDCF 10.1% vs 10.7% — now marginally positive, where June's was −2.7pp. Flat on the year (−0.7%).
In short: UPGRADED HOLD → BUY, and ranked #5 among superinvestor buys four days earlier. FV $5,027.4 vs $1,238.7 = 75.4% under — the largest headline discount on the list, driven by a 25.0 fair exit PE against a 30.8 current multiple; but the forward-PE test says only 11.2% under and the RDCF disagrees outright (13.4% required vs 10.7% expected). A case where the three models diverge more than usual.
In short: The "supplier, not the operator" framework: airlines are a notoriously bad, capital-intensive, no-pricing-power business, but suppliers like TransDigm "are great businesses" — compare the 10-year charts of AAL vs TDG. His analogy: hyperscalers may be becoming "airlines" while their suppliers become "TransDigm."
TransDigm makes specialized aircraft parts and services. Eisman's framework here is "own the supplier, not the operator." Airlines are a famously terrible business — hugely capital-intensive, with no ability to raise prices — whereas the companies that sell to airlines (like TransDigm) have pricing power and have been wonderful long-term stocks. He suggests literally pulling up the 10-year charts of American Airlines and TransDigm to see the gap.
The bigger idea: the AI hyperscalers may be turning into "airlines" (burning enormous capital with thin durable advantage), so the smarter bet could be their "TransDigm-like" suppliers — power generation, semiconductors, networking equipment.
11:58It's very capital intensive and no airline has any pricing power. However, companies like TransDigm that supply parts and services to airlines are great businesses. Just compare the 10-year charts of American Airlines and TransDigm and you get the point. It's possible that the hyperscalers and large AI players are becoming like airlines while their suppliers are becoming like TransDigm.
In short: Ranked #5, and upgraded Hold → Buy on the Buy-Hold-Sell list four days later. "Around 90% of TransDigm's sales come from products only they make" — sole-source aerospace parts on aircraft that fly for decades under mandatory repair schedules, so demand is regulated rather than cyclical and "they can raise prices every year without losing customers." The IR slide gives the mix: proprietary revenue the large majority, pro-forma revenue Defense 43% / Comm OEM 25% / Comm aftermarket 32%, with aftermarket dominating EBITDA.
TransDigm buys the companies that make small, highly specific aeroplane parts — the sort of part where the regulator has certified exactly one supplier for exactly one aircraft. About 90% of what it sells, only it is allowed to sell. Aircraft stay in service for decades and are legally required to have parts replaced on a schedule, so demand does not depend on whether airlines feel optimistic; it depends on flying hours and the maintenance manual.
Put those together and you get a business that can raise prices every year and lose nobody, because the alternative to paying is grounding the aircraft. Most of the profit comes from those replacement parts rather than from selling to the aircraft manufacturers in the first place, which is the more profitable and more predictable half of the industry.
In short: The template the whole pitch is built on: "The stock has risen by +4,800% (!) since 2006… what if I told you there's a smaller, cheaper version you've never heard of?" Founded by Nick Howley in 1993 with $25 million and now worth $70 billion. The structural parallel is drawn explicitly: mission-critical inputs that are a small fraction of total cost (aircraft parts; retardants at 3% of suppression cost) and heavily regulated markets that raise the barrier to entry (FAA approval; lab and field testing). "You can see Perimeter as a smaller version of TransDigm that isn't limited to the aviation market. It's a sector-agnostic TransDigm."
In short: "A collection of mini-monopolies": 100+ niche aviation businesses where 90% of revenue comes from products TransDigm is the only supplier of. The pricing mechanism is spelled out — parts "cost a tiny fraction of what a plane costs, [so] airlines barely notice the bill. So TransDigm raises prices 5-6% every single year." Record: 27.4% a year since the 2006 IPO — "$10,000 invested at IPO is now worth $1.3 million." Tailwind: Boeing and Airbus can't build fast enough, so older planes fly longer and consume more parts. Structure: "a Private Equity model in a public stock" — debt to buy, cash flow to repay, repeat. Target 25x forward = ~$1,000 against $1,148. Later ranked Best Buy #2 in August.
TransDigm buys small companies that make specific aircraft parts, and it deliberately buys the ones where it will be the only legal supplier. Ninety per cent of its revenue comes from parts nobody else is allowed to sell. Aircraft stay in service for decades and parts wear out, so airlines and air forces have to keep buying.
The pricing trick is worth understanding because it generalises. Each part costs almost nothing relative to an aeroplane, so an airline barely notices a price rise on it and will not go to war over a few thousand dollars. TransDigm therefore raises prices 5-6% a year, every year, and nobody stops it. Since going public in 2006 the shares have compounded at 27.4% a year — $10,000 at the IPO would be $1.3 million now.
It funds acquisitions with borrowed money, then uses the cash the acquired businesses throw off to repay the debt and buy more — the way a private equity firm operates, run inside a listed company. That is described here as an attraction; it is also the reason a downturn would hurt more here than at a debt-free peer, and no leverage figures are given.
The stated buying level is 25 times forward earnings, about $1,000 a share against a market price of $1,148.
In short: Full 15-step deep dive — Total Quality Score 8.0/10 — and a published pass with an entry price. "TransDigm is a phenomenal business. Nevertheless, we are not buying for three reasons: Large size… Heavy gearing… Rich valuation levels. We would start to become interested at a FWD PE of 25x times earnings. This means we would become interested at a stock price of $1,010 (12.5% below today's stock price)" of $1,156.5. The case for it: over 100 mini-monopolies, 80% of revenue from sole-source products, 5–6% annual price rises on parts that are "less than 0.1% of the aircraft's overall cost," 59.6% gross margin, ROIC 17.0%, CAPEX/Sales 2.6%, Owner's Earnings +29.1% a year over ten, +27.6% a year since the 2006 IPO and a 3,000-bagger since 1993. The case against it, in the same piece: Net Debt/EBITDA 5.9x, interest coverage 2.5x, goodwill 46.6% of assets, negative equity, an average SBC of 11.0% of net income, and a reverse DCF requiring 13.9% annual FCF growth — "this could be possible, but there is no large margin of safety."
TransDigm owns more than a hundred small companies that each make one specific aircraft part — seatbelts, soap dispensers, pumps, ignition systems. Each one is essential to flying, each has almost no competitor, and each costs the aircraft maker a trivial amount relative to a $40 million plane. That combination is the whole business: when a part is legally required, unavailable elsewhere, and costs less than a rounding error, the maker can raise the price every year and nobody argues. TransDigm does exactly that, 5 to 6% annually, forever.
The bigger money is in replacements. Aircraft fly for thirty to fifty years, and the parts wear out. Nobody wants to spend the time and money getting a competing seatbelt approved by regulators for a shrinking fleet of ageing planes, so the original maker keeps the whole aftermarket at very high margins. TransDigm says 80% of its revenue comes from products where it is the only supplier.
The record is extraordinary — from $25 million of capital in 1993 to a company worth $65 billion, compounding at more than 26% a year, plus $15 billion of special dividends since 2017. Charlie Munger, notably, thought the whole thing was "immoral," which the article prints without ducking.
And then it declines to buy, for three reasons that are all about the shape of the company today rather than its history: it is now large enough that reinvesting the cash is getting harder; it carries a lot of debt (interest is covered only 2.5 times, and last year it borrowed to pay a dividend, which the piece calls out); and it is not cheap. The useful part is that the pass comes with a number — it becomes interesting at 25 times forward earnings, which is $1,010 a share against $1,156 today.
In short: First of the eight quality-fund buys, and named again in the conclusion ("Transdigm, Amazon, Adobe, and Zoetis"). Reported without analysis here — the full 15-step deep dive follows three weeks later on 2026-MAR-26.
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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.