NEW YORK (AP) — Shares of some top biotechnology companies are mixed at 10 a.m.:

Amgen Inc. fell $.54 or .6 percent, to $86.86.

Biogen Idec fell $.73 or .5 percent, to $148.34.

Celgene Corp. fell $.32 or .4 percent, to $78.96.

Gilead Sciences Inc. rose $.05 or .1 percent, to $72.71.