From memory, the last annual report had 683 stock holders (but there must be others that are listed under their specific brokers rather then directly by their own name).
Correction, here it is: "As of March 15, 2002, there were 830 recordholders of Common Stock, although the Company believes that the number of beneficial owners of its Common Stock is substantially greater." (page 16), my dyslexia won over my memory... (vbg).