Amgen Inc.'s (AMGN) proposed $130-a-share, or $9.5 billion, takeover of Onyx Pharmaceuticals Inc. (ONXX) has stalled over access to drug trial data, although the offer price itself is not at issue, Bloomberg News reported Thursday on its website, citing three people familiar with the matter.

The deal is being slowed over whether Onyx will provide to Amgen data on a blood-cancer treatment which is in the midst of a trial. Because the trial is ongoing, Onyx doesn't have access to the data and obtaining the results prior to conclusion of the study could slow the drug's approval, one person told Bloomberg.

A spokeswoman for Onyx declined comment to Bloomberg and a spokeswoman for Amgen said the company doesn't comment on market rumors.

Full story at: www.bloomberg.com/news/2013-08-15/amgen-talks-to-buy-onyx-said-to-stall-on-drug-trial-data.html

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