18.3. If more than one person acquiring is required to offer shares as a result of the same fact, any such person acquiring, whose shares have all been purchased, may nevertheless retain all of his shares, if not all shares offered by all persons acquiring are purchased, in which case article 16, paragraph 4.A shall equally apply.

В тексте говорится примерно следующее: Если в силу изложенного (указанного) факта акции будут предлагаться несколькими [приобретателями], любой такой приобретатель, ВСЕ акции которого были предложены для продажи, вправе, тем не менее, оставить у себя ВСЕ свои акции, если покупаются не ВСЕ акции, предложенные ВСЕМИ приобретателями, и в этом случае также применяется...

Т.е., должны быть куплены именно ВСЕ акции, а если покупаются не все акции, а только их часть, он может удержать их у себя.

Остается разобраться с person(s) acquiring...

18.1. In the event of a transmission of shares - not including a merging of estates as a consequence of marriage or partnership registration - whether in whole or for an undivided part, the shares included in the transmission shall be deemed offered within the meaning of article 14, paragraph 2, unless article 19.b applies to the sole person acquiring or to all persons acquiring. Such shares shall be deemed offered at the time of the transmission.
If, however, article 19.b applies only to one or more, but not to all persons acquiring, or a bequest has been made in respect of one or more shares comprised in the transmission to one or more persons, including persons to whom article 19.b applies, the shares included in the transmission or in respect of which such a request has been made shall be deemed offered on the date two years from the transmission provided however that:
a. insofar as prior to that date shares, as referred to above, were transferred by virtue of a division of a joint shareholding to one or more persons to whom article 19.b applies or were transferred to one or more such persons in the execution of a request, the shares concerned shall not be deemed offered;
b. insofar as prior to that date it is ascertained that the provisions of a. above can no longer be applied to such shares, the shares concerned shall be deemed offered on the date on which that is ascertained.

18.3. If more than one person acquiring is required to offer shares as a result of the same fact, any such person acquiring, whose shares have all been purchased, may nevertheless retain all of his shares, if not all shares offered by all persons acquiring are purchased, in which case article 16, paragraph 4.A shall equally apply.