Biotechnology companies shares up at 1 p.m.

Shares of some top biotechnology companies are up at 1 p.m.:

Amgen Inc. rose $1.51 or 1.3 percent, to $119.88.

Biogen Idec rose $9.47 or 3.0 percent, to $324.78.

Celgene Corp. rose $2.05 or 2.4 percent, to $87.93.

Gilead Sciences Inc. rose $2.37 or 2.9 percent, to $85.28.