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Prothena Corporation plc (PRTA) short interest & options flow

NASDAQ

$8.50+0.24% 1d+1.67% 1w-0.93% 1mClose: 20 Oct 2026

Short interest % of float: High
Cost to borrow: Low

Market cap: $436M
Next earnings: 5 Nov 2026

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Key data as of 21 Oct 2026

ORTEX chart of Prothena Corporation plc (PRTA) share price and short interest (% of free float), six months to October 20, 2026

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