This monograph is based on qualitative and inductive research. All the cases treated in it are based on current events and try to find the common aspects and basic rules that govern the wrongdoing to the minority shareholders. In the four cases of US, French and Israeli companies, most of them in high tech, the minority shareholders lose almost all their investment. Those are not pervert cases but the norm in many companies, which is illustrated by qualitative cases, without being able of course to quantify them. Case studies are the preferred strategy when "how" and "why" questions are being posed. The purpose of this monograph is therefore to analyze why and how companies do not act ethically towards their minority shareholders, not how many, not which, not to what degree and not where.