(9)Member States should take the necessary steps to protect the holders of securities, in particular those with minority holdings, when control of their companies has been acquired. The Member States should ensure such protection by obliging the person who has acquired control of a company to make an offer to all the holders of that company’s securities for all of their holdings at an equitable price in accordance with a common definition. Member States should be free to establish further instruments for the protection of the interests of the holders of securities, such as the obligation to make a partial bid where the offeror does not acquire control of the company or the obligation to announce a bid at the same time as control of the company is acquired.