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The Founder's Notes

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The template only earns its keep if you actually put two cases next to each other.

This is the reason every teardown answers the same questions in the same order. Put a luxury house beside a console platform and the differences stop being vibes — one is refusing sales to protect a price, the other is selling below cost to collect a toll, and both are defending a moat.

Toys · Private — Kirkbi (Kirk Kristiansen family)

Lego

A family-owned Danish toymaker that sells one product — an interlocking plastic brick whose patents expired decades ago — at a margin most luxury houses would envy, having nearly gone bankrupt in 2004 by trying to be anything else.

Technology · NASDAQ: AMZN

Amazon

Runs a near-breakeven retail operation at enormous scale, and earns essentially all of its profit from renting out the two things that operation forced it to build — computing capacity and shelf placement.

The thesis in one line

Lego's patents ran out in the 1980s and its moat did not. The brick was never the asset. The system was.
The store is not the business. The store is the customer acquisition cost for the businesses.

Verdict

Own it
Own it

Moat

Wide

Brand · Network effects · Scale economics

Wide

Scale economics · Network effects · Process power · Switching costs

Porter's five forces

Competitive rivalry
Threat of new entrants
Threat of substitutes
Buyer power
Supplier power
Competitive rivalry
Threat of new entrants
Threat of substitutes
Buyer power
Supplier power

Headline figures

Revenue
≈ DKK 74.3B
Operating margin
≈ 25%
Unique elements, 2004
≈ 13,000 cut to ≈ 7,000
Patent status
Expired
Net sales
$638B
AWS share of operating income
~58%
Retail operating margin
~5.4%
Third-party share of units
~60%

Unit economics

One DKK 450 (≈ €60) licensed set sold through a retailer — illustrative, since Lego does not report by product

The plastic in a set costs a fraction of what the set sells for, and has done since 1958. What the 2004 crisis proved is that the margin disappears the moment the company stops making bricks that fit other bricks — the cost side was never the problem, the range was.

One $50 third-party item sold through Amazon

Amazon captures roughly 38% of the sale price and carries none of the inventory risk. The seller took the risk, paid for the warehouse, and then paid again to be found in a search of Amazon's own catalogue.

What would change her mind

If the 18+ and licensed sets shrink for two consecutive years while the evergreen themes are flat, the growth of the past decade was a fashion and the base business is a mature toy company with a good margin. And if Lego ever again launches a product line that does not fit the brick — the sign of 1999 — I would treat it as the leading indicator it proved to be last time.
If AWS revenue growth falls below 15% for two consecutive quarters while segment operating margin also declines, the cloud business is being commoditised rather than merely contested, and the capex is being spent defending share rather than buying growth. That combination — decelerating growth and compressing margin at the same time — breaks the thesis outright. A single weak quarter on either measure alone does not.

No mechanisms in common

These two share no tagged mechanism, which usually means the comparison is about contrast rather than pattern — a useful thing to know before you start writing.