When EVCA initially issued their IPO, they held ALL of the common stock, so every share that was purchased, put money into the company.
Once common stock has been purchased and then resold to other investors, EVCA doesn't get any money from those transactions.
It's not until the BUYS exceed the number of shares previously sold, that monies will get back to EVCA UNLESS they sell the stock personally, instead of over the counter.
On the preferred shares, EVCA gets to SET what every share price they want on the value of the stock.
In some cases, a company would rather hold Preferred shares, because in the event of a bankruptcy, they get paid BEFORE the common stock shareholders, however in this case, since the transfer was made just prior to EVCA attending the Dezer event, I personally believe they made the switch because they expect other investors or partners will want preferred shares and wanted to make sure the EVCA execs got their shares first.
Sometime,(not often) it could also involve voting rights.
Either way, my gut feeling is that they made the trade for their own protection and to make sure they got plenty of compensation for their hard work in the past as well as for the work they are going to be performing in the future.
I "think" this is a good sign, especially because of the timing.
Just my thoughts.
AI
