RE:Medco, form 812 Jan 2019 05:52
is the form8 announcement not more to do with the takeover code rule
"If the offeror acquires an interest in shares in an offeree company (i.e. a target) at a price higher than the value of the offer, the offer must be increased accordingly."
i.e. they are stating that they do not hold any shares at a value higher than the offer.