TempePhil, nice post. One area not mentioned but key is in the area of Mergers and Acquisitions (M&A). Information gleaned by mktg., scientists, etc. could also be used by the folks in M&A to further the corporation's interests. Within that realm one could be quietly investing in a given company for the purpose of acquisition, JV, or even as an investment. A strategy, for example, could be deployed whereby a company wants to accumulate shares in a given company below the 5% threshold as cheaply as possible. Sound familiar?