updated 5/10/2010 10:33:49 AM ET 2010-05-10T14:33:49

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

Amgen rose $1.62 or 3.0 percent, to $56.08.

Biogen Idec rose $1.32 or 2.6 percent, to $51.71.

Celgene rose $1.50 or 2.6 percent, to $58.99.

Gilead Sciences rose $.64 or 1.7 percent, to $39.01.

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