There are no pure zinc companies. Zinc is mined with copper, silver and lead.
Teck Resources (TCK/B) is a large diversified mining company with 35% of cash operating profit coming from zinc. Glencore is also the other option in terms of large caps.
Other Canadian producing mining companies with zinc exposure are: Lundin Mining (LUN), HudBay
Minerals (HBM), Trevali Resources (TV), Nevsun Resources (NSU).
Junior exploration companies with zinc resources are: AZ Mining (AZ), Nevada Zinc (NZN), Canada Zinc (CZX), Tinka Resouces (TK) and InZinc Mining (IZN).