"I want to know if any of you did actually sell or cut your holding in MNTA?" I'm not sure who "you" means, but I certainly closed my entire position the day of approval (as my posts would make obvious). I have since bought back in, but only 25% of my original position, and I "foolishly" sold $25 calls on that purchase, not really caring whether they would be exercised. No credit or blame to anyone, as I simply followed the voice of my own experience on this. Net of everything, my current position has a cost of just over $20 and a net current value of just over $17. (Of course, I'm trading "free" shares now if past transactions are taken into account.)
For what it's worth (probably not much), I would guess that today's sell-off is typically exaggerated, and I'm not doing anything at today's price levels. Should the price stick here, I'll simply sell another round of options at expiration and be just about back to scratch.