Strange Gryphon Minerals trading

I don't know if anyone has noticed this, it has been going on for the last month. Someone is buying in lots of a thousand, each trade volume ends in 000. Often though this can be combined into 2 or 3 purchases with the same time stamp. For example see below, 11,658 plus 3,342 adds up to 15,000.

	Column 1	Column 2	Column 3	Column 4	Column 5
0	12:55:42	0.1850	11,658	2,157
1	12:55:42	0.1850	3,342	618	XT
2	12:55:42	0.1850	12,308	2,277
3	12:46:37	0.1850	30,000	5,550
4	12:46:36	0.1900	10,000	1,900

Usually when they buy the price goes up not down so it is not someone divesting shares. However when the price goes up too much they slow their purchases. I estimate they could have bought as much as 10% of the company over the last month. It also seems like they are having trouble finding shares to buy now, they might have scooped up nearly all the shares available.