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

Amgen Inc. rose $.06 or .1 percent, to $119.19.

Biogen Idec rose $1.52 or .5 percent, to $314.98.

Celgene Corp. rose $.01 or percent, to $171.00.

Gilead Sciences Inc. rose $.43 or .5 percent, to $81.23.