A segment table is where a company tells you what it actually is. We measured every company in AnalystBook's record that reports two or more operating segments in its latest annual filing — 902 companies, fiscal 2024 or later — and asked one question: how much of the revenue does the biggest segment carry?
1. “Diversified” usually isn't
The median multi-segment company earns 62.5% of its revenue in its single largest segment. In 652 of the 902 — 72% — one segment is more than half the business, and in 287 — nearly a third — it's more than three-quarters. A company can present four segments across four pages of disclosure and still be, economically, one business with three hobbies. If you read one thing in a 10-K's back half, read the mix — it's the difference between analyzing the company and analyzing its brochure.
2. Most segment tables are short
Among the 902: 381 companies report exactly two segments, 253 report three, 147 report four, and only 121 report five or more. The median is three. Segment count is a disclosure choice as much as a business fact — accounting rules let management aggregate operations it steers together — so a short table can mean a focused company, or a company that prefers you see it that way. When a company re-draws its segments, pay attention: the new map is telling you where management wants the light to fall.
3. Why this is the first thing on our company pages
This is why every covered company's intelligence page leads with “where the revenue comes from” — the latest mix, as the company reports it. The thesis is almost never in the aggregate revenue line; it's in one segment growing while the others pay for it, or one segment quietly becoming the whole company. The aggregate tells you how big the company is. The mix tells you what it is.