It seems insiders simply selling with both fists. This is not your usual "there are more insider sellers than buyers". In the case of facebook there seem to be an avalanche of insider sellers, to the tune of over a quarter of BILLION shares over the last few months to a negligible buys, less than 50 thousand shares.
I checked several sources and they all verify above numbers (including the SEXC fillings). How in the world did market not notice such a huge lopsided insider transactions is beyond me. The numbers indicate that insiders are only selling by 100s of millions and are not coming back to repurchase at all. This is insane. If true, which it apparently is (nobody, I mean not a single person, here has even questioned these numbers), then FB probably has some major issues and concerns that only insiders so far know.
If news of such a massive, and I mean MASSIVE, insider selling (which is so far added to nearly 20% of total float) becomes known nationwide I bet FB will drop to single digits in a matter of less than a week. Guaranteed.
The next issue is how in the world Facebook is been able to keep such publicly available information from becoming know in a widespread bases? And where the heck are the so called analysts that are suppose to inform the retail investors?