trading today

Very interesting trading day - 3 trades stand out:
10:06 - purchase 1905290 (might be more on open) - for over $200,000
11:14 - sale of 151k shares for $15,100
11:41 - sale of 200k shares for $20,000.

I'm hoping this rise is not a pump and dump. Spending $200k on shares is a very intersting move though considering the amount of shares that we have available in australia.

The other interesting thing, is that we have bots in operation - which account for nearly all of the 38 trades done today (less the above three). The bots seem to be buying at 10.5 in very small amounts.

The only reason I can think of for a bot to be manipulating by buying shares is to keep the price showing higher regardless of the sells, or a pump and dump.

Anyone else read anything into the above?