What is market share research?
Market share research estimates how much of a defined market belongs to a company, product, or brand during a stated period. Share may be based on revenue, units, customers, seats, transactions, usage, search demand, or another measure. The denominator must match the numerator and the market boundary.
Market share is not one universal fact. A company can have high customer share and lower revenue share, or strong share in one segment and little global presence. Private-market research often relies on estimates, so the method and range matter as much as the reported percentage.
How to calculate market share
For revenue share, the common formula is:
Market share = Company revenue in the defined market / Total revenue in the defined market x 100
Company revenue should include only the products, geography, customer segment, and period included in the market definition. Total market revenue must use the same boundary and currency treatment. Unit share replaces revenue with comparable units, while customer share requires a consistent definition of active customer.
Researchers may triangulate public filings, vendor disclosures, channel data, customer surveys, analyst estimates, web or app usage, and modeled private-company revenue. Proxy measures such as search share or review share can describe visibility or activity, but they should not be labeled revenue share without evidence.
How to interpret it
Share can indicate position, concentration, and change, but it does not automatically show profitability, customer satisfaction, or competitive advantage. A company may gain share through heavy discounting. A niche provider may hold modest category share and strong economics within a narrow segment.
State uncertainty and sensitivity to the market definition. Acquisitions, currency changes, channel inventory, multi-product bundles, and overlapping categories can distort comparisons. Use ranges when private-company inputs are modeled, and keep the estimate dated.
What to document
Store the source values and calculation with the reported number. A reviewer should be able to see the unit, time window, cohort, exclusions, and uncertainty without searching a separate methodology deck. Recalculate market share when those definitions change. Record the calculation version and review date so later comparisons use the same method or explain the change.
Example
A company sells $42 million of workflow software in North America. Researchers estimate the matching market at $600 million to $700 million for the same year and customer segment. Revenue share is therefore about 6.0 to 7.0 percent. If the broader estimate includes adjacent project-management products, the denominator no longer matches the company's revenue definition.
A defensible share estimate begins with the market boundary and comparable units. Publish the sources, assumptions, range, and proxy labels so decision makers know what changed when the percentage moves.