PRTA Short Interest

Short InterestVery High
Short Interest?8.5M
Days to Cover?24.9
Avg Daily Volume341.9K
Settlement Date2026-08-31
Short Volume Ratio (30 Day)Avg: 6,334.1%
2026-08-042026-08-252026-09-15
Latest Short Vol Ratio7,588.0%
Short Volume72.5K
Total Volume95.5K
Prothena (PRTA) โ€” Short Interest