Market sizing & growth · Core
Market share
Also called: share
ELI5
The company's portion of the market.
Used in conversation
“State whether market share is based on revenue or units.”
Definition
A company's sales, users or volume as a percentage of the defined total market.
Here “Market share” means: A company's sales, users or volume as a percentage of the defined total market.
Pitch context
You will see “Market share” in strategy decks, market analyses, business plans and planning workshops when the discussion reaches market sizing & growth.
Why it matters: It helps a reader interpret market sizing & growth without confusing the measure, decision, role or evidence being discussed.
Connected terms
- ShareThe search label “share” can route to both entries.
Sources & evidence · 5
Supporting source families. This entry is an editorial synthesis rather than a quotation from one canonical glossary.
- Strategyzer — Business Model Canvas resourcesSupporting source family · practitioner · checked 2026-08-16
- Strategyzer — Value Proposition Canvas resourcesSupporting source family · practitioner · checked 2026-08-16
- LEANSTACK — Lean CanvasSupporting source family · practitioner · checked 2026-08-16
- U.S. Department of Justice Antitrust Division — Herfindahl-Hirschman IndexSupporting source family · primary · checked 2026-08-16
- U.S. Census Bureau — Business and economy dataSupporting source family · primary · checked 2026-08-16