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Nasdaq:PRTA

Prothena Corporation (PRTA)

Nasdaq • PRTA • IE00B91XRN20

8.73Last close

Market Closed

Trading Signals

ORTEX Data Highlights

As of Oct 27, 2026, ORTEX estimated 24.1% of free float sold short, 14.2 days to cover, cost to borrow 0.27%. Sign up for live short interest data.

Market Cap

448m USD | # 6182 in US

Volume

464.63k shares | 4.07m USD

Shares Outstanding

51.35m

Free Float Shares

65.07% | 33.41m

DB:0PT|

LSE:0Y3M

News

PRTA key data

Prothena Corporation (Nasdaq: PRTA) has a market capitalization of $448.28M. Last close $8.73 (as of 2026-11-12); 52-week range $7.73 to $11.80. ORTEX data as of 2026-10-27: short interest was 24.1% of free float, 14.2 days to cover and the average cost to borrow was 0.27%. Sign up for live short interest data.

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