Why concentration is a risk
Chapter 1 of 12 · 4 min
Understand why one customer at 60% is a catastrophe in slow motion
10x Insight
A company with one customer at 50%+ of revenue is not an investment case — it is a lottery.
Concentration — the silent risk factor
Revenue diversification is about how broad the company's revenue base is — how many customers, products, markets, and geographies contribute to revenue. A customer accounting for 60% of revenue is not a customer — it is an employer. If that customer leaves (bankruptcy, switches supplier, in-sourcing) the company dies overnight. This is concentration risk — the silent, often ignored, but potentially catastrophic risk factor. AKM1 gives score 1 (lowest) to companies with one customer >50% of revenue; score 5 (highest) to companies with no customer >5%. The difference in risk between these is astronomical. A company with customer concentration above 50% can return 30% one year and -80% the next. A company with a broad customer base can deliver a stable 12% annually over decades.
⚠️ WARNING
A company with one customer at 50%+ of revenue is not an investment case — it is a lottery. Avoid it unless you have insider information about the customer contract.
The three dimensions of diversification
Revenue diversification has three dimensions, all of which must be analyzed: 1) customer diversification — how many customers, what share do the top 5/10/20 represent? 2) product diversification — how many products, what share does the top 1/3 represent? 3) geographic diversification — which countries/regions, what share is the home market? Each dimension can hide concentration. A company can have 1000 customers (good customer diversification) but 80% of revenue from one product (poor product diversification) — if the product becomes obsolete, the company crashes. A company can have 50 products and 5000 customers (good) but 90% in Sweden (poor geographically) — a Swedish recession hits the entire company. A complete analysis covers all three dimensions. Read note 1 (segment information) in the annual report to get this.
📖 DEFINITION
Concentration = share of revenue that comes from a single customer/product/market. The higher, the higher the risk. Thresholds: >50% = critical, 30-50% = high, 10-30% = moderate, <10% = good, <5% = excellent.
Why concentration arises
Concentration is rarely chosen — it arises naturally in business development. Three common causes: 1) Anchor customer — many startups are built around one large first customer. Tesla was built around early Model S buyers; SpaceX around NASA contracts. 2) Industry structure — some industries have few buyers. If you sell components to the aerospace industry you have 5-10 potential customers (Boeing
⚡ KEY INSIGHTS Concentration = the silent risk factor — can give 30% one year and -80% the next Three dimensions: customer, product, and geographic diversification — all must be analyzed Thresholds: >50% critical, 30-50% high, 10-30% moderate, <10% good, <5% excellent Concentration arises naturally (anchor customer, industry structure, relational selling) — not always bad 2