largest market share; top share
Wasei-eigo term used in business contexts to refer to the highest market share in an industry or product category.
wasei-eigo (Japanese-coined English), from top share
This product boasts the largest market share in the country.
We need a new strategy to maintain our top share.
Variant with interpunct; less common but seen in some contexts.
Wasei-eigo formed from English 'top' and 'share'. It is wasei.