RE:$$ ;Okay, I'll wade in on this one. You have to understand how corporations are structured and more importantly what a corporation is. V.HPQ is a corporation registered and created federally. It trades on the TSX and is a public entity. You can search its officers and directors on the federal web site. V.HPQ owns a few smaller corporations which it has created to undertake different enterprises. Those smaller corporations are privately held by V.HPQ and do not trade on the TSX. HPQ Polvere is one of those. You can't buy shares of HPQ Polvere but if you like what that corporation is doing you can try to profit by it's activities by buying shares of V.HPQ which owns it wholly.
Its all about legal entities. A person (Joe Smith, you and I) are a legal entity. A corporation also is a legal entity which means it can be ordered, charged, issued a pernit or license or sued. A corporation can own another corporation. V.HPQ owns HPQ Polvere. Each entity has its own Board of Directors and Officers which directs it activities.There are shared officers and directors between V. HPQ and HPQ Polvere but they remain separate entities which file income tax separately.
If you like fumed silica as an investment opportunity you have to buy into V.HPQ because HPQ Polvere does not trade publically being privately owned in its entirerty by V. HPQ.