PRTA Short Interest

Short InterestVery High
Short Interest?8.5M
Days to Cover?19.6
Avg Daily Volume436.9K
Settlement Date2026-08-14
Short Volume Ratio (30 Day)Avg: 6,375.0%
2026-07-162026-08-062026-08-26
Latest Short Vol Ratio3,400.0%
Short Volume35.3K
Total Volume103.8K
Prothena (PRTA) โ€” Short Interest