(1) An issuer of shares shall, if it acquires or disposes of its own shares, either itself or through a person acting in his or her own name but on the issuer's behalf, make public the percentage of voting rights attributable to those shares as soon as possible, but not later than 4 trading days following such acquisition or disposal, where that percentage reaches, exceeds or falls below either or both of the following thresholds, namely, the thresholds of 5% or 10% of the voting rights.

(2) The percentage shall be calculated on the basis of the total number of shares to which voting rights are attached.