Bill-The shareholders listed are filing this 10K jointly as required by the SEC for larger shareholders or shareholders with greater than just a retail ownership to notify the SEC of the POSSIBILITY of the sale of the number of shares indicated.   There is not an intent to sell all of these shares in unison if that is what you were thinking.  They may not sell at all.  Now they are able to sell some or all shares indicated if they so choose.  It's optional.

It is somewhat puzzling how all of these folks and entities wound up on the list in the 10K at the same time.  Would they have separately notified PTSC over some period of time and this is some sort of year end document that is typical?  Not sure.  Anyone?