The most-cited number in American private-company commerce comes from the National Center for the Middle Market at Ohio State: roughly 200,000 companies with $10M–$1B in revenue, producing a third of private-sector GDP. It anchors bank decks, PE fund theses and countless LinkedIn posts. It is also, methodologically, an estimate calibrated from surveys, so we ran the obvious test: count them.
“There are nearly 200,000 U.S. middle market businesses with revenues between $10M and $1B, accounting for one-third of private sector GDP.”
Source: National Center for the Middle Market (Ohio State); repeated by Capstone Partners and most M&A literature
Confirmed, from the bottom up. Our dataset counts 187,896 U.S. companies with $10M–$300M in estimated revenue, one by one. NCMM's definition runs to $1B; adding the $300M–$1B tail (a thin slice of the pyramid) closes most of the remaining gap to 200,000. Two completely different methods, their survey calibration, our company-level count, land within a few percent of each other. The number holds.
Why a confirmation matters more than a takedown
Data checking is not contrarianism. When two independent methods agree, you can finally trust the number enough to build on it, fund models, territory plans, market-entry cases. When we test a claim and it survives, we say so. (When it doesn't, we say that too, see our family-business survival piece.)
Source: Veltria dataset, 4,840,019 companies, computed 2026-07-09.
The part the survey can't give you
NCMM's work tells you the middle market exists and how executives feel about it. It cannot tell you which 187,896 companies they are, their names, domains, industries, headcounts and locations. That roster is the difference between quoting the market and working it.
The full U.S. $10M+ roster, every company behind this data check, as a CSV.
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