a please explain

Can someone please explain how Lujeta have been able to increase their holding over a two year period from 10% to 11% (1.4 million shares)without notification to the ASX over that period till today? I suspected for sometime that Dom share price fall of recent times was not above board, this certainly adds fuel to the fire. Is there anyway of finding out exactly what dates the 1.4 million shares were bought? and does it corelate with the dramatic fall in DOM share price, that management incidently did nothing to arrest? Now do we see a reason why. I always thought Dom management were a cut above the rest, but now I wouldn't trust them as far as I could kick them.
It would be very hard to believe that DOM management were not aware the second biggest shareholder was accumulating this many shares to become DOM's biggest shareholder.