1) One that stocks goods 2) Provider 3) Supplier 1) Supplier 
A distributor of semi-fabricated products who holds stock for sale to consumers.
A stockist holds supplies of non-ferrous semis and steel products ready for sale to users. Stockists usually specialise either in steel/stainless steel/aluminium or in copper/brass/high-value metals. Known in the USA as Service Centers. See also Metal Service Center Institute A stockist function is also fulfilled by, for example, a builders
[n] - one (as a retailer or distributor) that stocks goods
noun one (as a retailer or distributor) that stocks goods
a wholesale or retail establishment that stocks merchandise.