The key points in brief:
Within Europe the EU has no competence for Criminal Law, so even in the supranational EU Criminal Law is national law. Therefore the consequences of a breach of law strongly depend on the national/federal or state regulations in criminal law. Nevertheless the consequences described in the bullet points above are in a broader simplified form comparable in the key nations involved in this project.
Although the personal involvement of all individuals which took part in the breach by acting wrongfully or by abstaining from an necessary action carries a personal risk of being fined or even imprisoned for aiding and abetting, the biggest damage is caused for the involved companies as the whole deal can be null and void and the company faces severe punishments.