very easily... they cancel the shares out of treasury, OR, more likely, issue themselves preferred shares, which are senior to common, and then cancel some of the shares they had, and sell the rest into the market as the lemmings buy buy buy!
One of several ways would be for Lumb to transfer shares held by his many companies that held them. Those companies suddenly no longer held enough shares to have had to file a 13g so it seems likely that they either transferred them back to the company or sold them into the market.
What are some other ways they can get the shares cancelled---other than a buyback? Not trying to be funny, just would like to know.
They could have been shares that were issued in anticipation of some kind of deal--say, an acquisition that would have been paid for with stock--and then never used.