Of the five public companies chaired by billionaire investor Robert Millner, the 82-year-old Milton Corporation is, perhaps, the most low-profile.

But it's not obscure enough to escape the attention of corporate gadfly Stephen Mayne, who noticed that the $2.8 billion listed investment company had published its notice of meeting and proxy forms without advising when its board nominations will close. So, Mayne went to the ASX, who went to Milton, who then advised shareholders that nominations will close on Monday, some 10 days after it sent out the meeting agenda and proxy form.