All of which is very plausible.
Since we have nothing to do but speculate anyway, this scenario is what I choose to believe.
First, there had been nothing, rumor or otherwise, to suggest a resignation or even any problem with the 10-K.
The filing of the 10-K certainly constitutes a material event, and the halt on Friday lends itself to a very simple yet effective way to outsmart the shorts and exact a little revenge....all well within the rules.