1. Where an issuer of shares admitted to trading on a regulated market acquires or disposes of its own shares, either itself or through a person acting in his own name but on the issuer's behalf, the home Member State shall ensure that the issuer makes public the proportion of its own shares as soon as possible, but not later than four trading days following such acquisition or disposal where that proportion reaches, exceeds or falls below the thresholds of 5 % or 10 % of the voting rights. The proportion shall be calculated on the basis of the total number of shares to which voting rights are attached.
2. The Commission shall, in accordance with the procedure referred to in Article 27(2), adopt implementing measures in order to take account of technical developments in financial markets and to ensure the uniform application of paragraph 1.