They have 3 big mining companies in their top 5.. could be one of them just offloading shares for a number of reasons.. 1. need cash.. 2. just want to clear the decks. 3. Keep the price down before coming in with a takeover offer. The last one is least probable, but makes sense as constant selling makes investors question stock (and sell) and keeps prospective investors cautious (see good results but not seen in share price so raise questions about quality of results). My guess is that one of the majors has just handed over the list of shares they own to a broker and asked them to sell out of anything that is too early stage or not performing (as of say a month ago).
MGV Price at posting:
8.0¢ Sentiment: Buy Disclosure: Held