I would equally guarantee that they won´t be, simply because there isn´t actually enough actual money to buy them all.
Markets are a real time pricing mechanism - they operate on instantaneous availability of both money and shares. Put enough shares out on the supply side, is the equivalent of flooding the demand side with money a. la. hyperinflation. In both cases, the good in question becomes effectively valueless.
I guarantee that 100% of any of their shares would be swiftly picked up if they were sold at a 5%+ discount to the 52-week low stock price.