Mindless, you will not be able to register and convert all of your preferred shares at once. Based on your investment, you will only be able to convert 1 or 2, (maybe a couple more if you have invested a lot.) The rest will need to be held for at least 6 mths (see rule 144.) after 6 mths, others will be able to be converted...how many is based yet again on outside factors. Something to keep in mind, if you do register and convert more to sell, you will no longer be eligible to collect a dividend on your remaining preferred shares.
