Just need some catalysts.
That was IPO selling. All other insider shares are locked for 60 days I believe.
"An insider pointed out that if you buy Facebook shares on the private market, you’ll have to hold them for 180 days after the IPO date–that’s everyone, not just employees. It says so here on page 145 of the March 27, 2012 S-1. It’s a mess of legalese (I included it at the bottom of the post*) but a source tells me it basically means no selling allowed until six months after the IPO."
Here's the link talking about the lockout.