These are shareholders of Terrestar Networks(not publicly traded) which is owned 89% by Motient.Which in return is fully owned 100% by Terrestar Corp which is publicly traded as TRSTQ. Again it does not matter what happens to Terrestar Networks stock as it is not traded on an exchange.
Here is a link to TSTRQ share structure...I wonder if one of the mods could post this up on the main info page somehow?
Note : all the white boxes are the non debtor estates which are part of the TSTRQ bankruptcy procedure.