Biotechnology companies shares mixed at 10 a.m.

Shares of some top biotechnology companies are mixed at 10 a.m.:

Amgen Inc. fell $.02 or percent, to $122.83.

Biogen Idec rose $1.31 or .4 percent, to $332.46.

Celgene Corp. fell $.07 or .1 percent, to $90.12.

Gilead Sciences Inc. rose $.55 or .6 percent, to $88.45.