changes to top 20 shareholders

I obtained the current Top 20 shareholders from TIS yesterday and have noted the following significant changes over 100K shares since the 2012 Annual Report:

Asia Union sold down from 13.33% to 9.59%
HSBC have increased their holding from 0.87% to 4.89%
National Nominees have appeared with a 4.45% holding
JP Morgan have appeared with a second holding of 3.66%
ABN Amro have appeared with a 2% holding
UBS have dropped out of the top 20 but may not have sold any

I have not tried to interpret these changes yet and would appreciate any thoughts on their significance.