Alium Added actually 22.6 Million since 1st April (Approx 10 weeks as said)
From 1st April to 21st May - Added 14,565 Million
From 22nd May to June 16th - Added 8,034 Million
* NOTE - Assuming all were bought through Morgan Stanley (my opinion only), which Broker Data suggests this is the case anyway, if you go through last 2 Sub Notices provided to the ASX, involving Alium adding to their position.
Wouldn't be surprised if they have also added Thursday & Friday this week to cement there position further, will find that out by mid week
