Short sellers moved out of biotech stocks in the latest period according to Biohealth Investor.

The short interest in Amgen (AMGN) dropped 22% and Calgene (CELG) fell 20%.

Alexion Pharmaceuticals (ALXN) split its shares 2-for-1 stock.

The company’s stock has done well as this was in the mid-$70’s in mid-July and shares put in a new 52-week and multi-year high this week with shares briefly trading above $95.00.