Ann: Change in substantial holding, page-2

All,
I usually don't pay much attention to such notices but I had a quick look at the transaction balance provided in this announcement and am a bit confused:
7/11/2016: Purchased 1,479,292 units at 3.97, sold 1,479,292 units the same day at 3.97
25/11/2016: Purchased 2,360,981 units at 3.97, sold 2,360,981 units the same day at 3.97.
....And the list goes on and on...
Any thoughts why they do it this way? Happy to enhance my knowledge in this field.