stockholder

from WordNet (r) 3.0 (2006)

stockholder
    n 1: someone who holds shares of stock in a corporation [syn:
         {stockholder}, {shareholder}, {shareowner}]

from The Collaborative International Dictionary of English v.0.48

Stockholder \Stock"hold`er\, n.
   One who is a holder or proprietor of stock in the public
   funds, or in the funds of a bank or other stock company.
   [1913 Webster]