My apologies if I misunderstand your post but the nominee companies do not own the shares as such.
The nominee companies are simply holding companies for shareholders who cannot legally hold the shares in Australia themselves. That is overseas holders of whom there may be hundreds of holders in each nominee company.
The chance of all these shareholders deciding to sell at exactly the same time is close to zilch I would think.
Regards
Lockitt
NGF Price at posting:
19.5¢ Sentiment: Buy Disclosure: Held