Prothena hopes to raise $180M af­ter Ei­sai Alzheimer's da­ta prompt­ed stock surge

Dublin-based Prothena has opened up 3 mil­lion of its com­mon shares via an un­der­writ­ten pub­lic of­fer­ing, trad­ing un­der the tick­er $PR­TA. Un­der­writ­ers get 30 days …

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