Prothena Corporation (PRTA)
9.71
0.51 (5.54%)
At close: Apr 17, 2025, 3:59 PM
Prothena Short Interest
Prothena has a total short interest of 8.38M. Its short interest has decreased by -4.49% to the previous Month.
Short Interest
8.38M
Short Prior Month
8.78M
% Change MoM
-4.49%
Short % Floating
29.3%
Short % Outstanding
15.58%
Days to Cover
18.37
Short Interest Chart
Short Interest History
| Date | Short Interest | Short Prior Month | % Change | Days to Cover | Short % Float | Short % Out |
|---|---|---|---|---|---|---|
| Apr 09, 2025 | 8.38M | 8.78M | -4.49% | 18.37 | 29.3% | 15.58% |
| Mar 25, 2025 | 8.78M | 9.13M | -3.84% | 19.66 | 25.69% | 16.31% |
| Mar 11, 2025 | 9.13M | 9.03M | 1.05% | 21.3 | 26.72% | 16.96% |
| Feb 26, 2025 | 9.03M | 8.9M | 1.51% | 30.98 | 26.45% | 16.79% |
| Feb 11, 2025 | 8.9M | 9.35M | -4.81% | 26.45 | 26.06% | 16.54% |
| Jan 27, 2025 | 9.35M | 8.77M | 6.61% | 20.2 | 27.38% | 17.38% |
| Jan 10, 2025 | 8.77M | 8.8M | -0.31% | 9.06 | 25.68% | 16.3% |
| Dec 24, 2024 | 8.8M | 8.06M | 9.19% | 18.14 | 25.76% | 16.35% |
| Dec 10, 2024 | 8.06M | 7.88M | 2.29% | 17.82 | 23.59% | 14.97% |
| Nov 26, 2024 | 7.88M | 7.53M | 4.59% | 17.87 | 23.06% | 14.64% |
| Nov 11, 2024 | 7.53M | 6.79M | 11% | 15.95 | 22.07% | 14% |
| Oct 24, 2024 | 6.79M | 5.3M | 28.02% | 10.31 | 19.88% | 12.62% |
| Oct 09, 2024 | 5.3M | 5.72M | -7.38% | 7.74 | 15.53% | 9.86% |
| Sep 24, 2024 | 5.72M | 5.59M | 2.28% | 24.9 | 16.77% | 10.64% |
| Sep 11, 2024 | 5.59M | 5.38M | 3.98% | 20.71 | 16.4% | 10.4% |
| Aug 09, 2024 | 5.38M | 4.77M | 12.72% | 13.61 | 15.75% | 10% |
| Jul 24, 2024 | 4.77M | 5.1M | -6.5% | 10.56 | 13.98% | 8.87% |
| Jul 10, 2024 | 5.1M | 6.66M | -23.37% | 5.89 | 14.95% | 9.49% |
| Jun 26, 2024 | 6.66M | 6.71M | -0.82% | 16.64 | 19.51% | 12.38% |
| Jun 11, 2024 | 6.71M | 6.51M | 3.02% | 15.03 | 19.67% | 12.48% |
| May 24, 2024 | 6.51M | 6.75M | -3.48% | 11.31 | 19.1% | 12.12% |
| May 09, 2024 | 6.75M | 6.63M | 1.84% | 14.45 | 19.78% | 12.55% |
| Apr 24, 2024 | 6.63M | 6.47M | 2.51% | 11.92 | 19.46% | 12.34% |
| Apr 09, 2024 | 6.47M | 6.25M | 3.46% | 10.99 | 18.98% | 12.04% |
| Mar 26, 2024 | 6.25M | 6.07M | 3.03% | 11.08 | 16.96% | 11.63% |
| Mar 11, 2024 | 6.07M | 5.81M | 4.38% | 8.63 | 16.46% | 11.29% |
| Feb 27, 2024 | 5.81M | 5.75M | 1.11% | 6.61 | 15.77% | 10.82% |
| Feb 09, 2024 | 5.75M | 6.26M | -8.21% | 8.12 | 15.62% | 10.71% |
| Jan 24, 2024 | 6.26M | 6.08M | 3.01% | 4.15 | 17.02% | 11.67% |
| Jan 10, 2024 | 6.08M | 5.82M | 4.53% | 8.42 | 16.52% | 11.33% |
| Dec 27, 2023 | 5.82M | 6.85M | -15.09% | 6.48 | 15.8% | 10.84% |
| Dec 11, 2023 | 6.85M | 6.19M | 10.58% | 13.24 | 18.61% | 12.76% |
| Nov 27, 2023 | 6.19M | 6.43M | -3.62% | 8.99 | 16.83% | 11.54% |
| Nov 09, 2023 | 6.5M | 5.08M | 27.96% | 5.2 | 17.67% | 12.12% |
| Oct 24, 2023 | 5.08M | 4.39M | 15.69% | 9.41 | 13.86% | 9.49% |
| Oct 10, 2023 | 4.39M | 4.28M | 2.73% | 10.75 | 11.98% | 8.2% |
| Sep 26, 2023 | 4.28M | 4.12M | 3.87% | 11.05 | 11.66% | 7.99% |
| Sep 12, 2023 | 4.12M | 3.7M | 11.2% | 9.68 | 11.23% | 7.69% |
| Aug 24, 2023 | 3.7M | 3.67M | 0.86% | 9.24 | 10.1% | 6.92% |
| Aug 09, 2023 | 3.67M | 3.64M | 0.72% | 10.29 | 10.01% | 6.86% |
| Jul 25, 2023 | 3.64M | 3.52M | 3.55% | 13.6 | 10.16% | 6.91% |
| Jul 12, 2023 | 3.52M | 3.68M | -4.41% | 7.47 | 9.81% | 6.67% |
| Jun 27, 2023 | 3.68M | 3.32M | 10.94% | 9.09 | 10.26% | 6.98% |
| Jun 09, 2023 | 3.32M | 3.21M | 3.25% | 7.11 | 9.25% | 6.29% |
| May 24, 2023 | 3.21M | 3.27M | -1.7% | 4.65 | 8.96% | 6.09% |
| May 09, 2023 | 3.27M | 3.27M | -0.09% | 10.54 | 9.11% | 6.2% |
| Apr 25, 2023 | 3.27M | 3.71M | -11.84% | 8.53 | 9.14% | 6.21% |
| Apr 12, 2023 | 3.71M | 3.45M | 7.68% | 7.62 | 10.37% | 7.05% |
| Mar 24, 2023 | 3.45M | 3.09M | 11.73% | 7.43 | 9.65% | 6.56% |
| Mar 09, 2023 | 3.09M | 2.96M | 4.15% | 6.52 | 8.64% | 5.87% |
| Feb 27, 2023 | 2.96M | 2.78M | 6.55% | 6.61 | 12.65% | 5.64% |
| Feb 09, 2023 | 2.78M | 2.88M | -3.29% | 7.58 | 12.11% | 5.34% |
| Jan 25, 2023 | 2.88M | 2.64M | 8.88% | 3.81 | 12.52% | 5.52% |
| Jan 11, 2023 | 2.64M | 2.41M | 9.59% | 4.57 | 11.5% | 5.07% |
| Dec 27, 2022 | 2.41M | 2.26M | 6.75% | 3.76 | 10.72% | 4.67% |
| Dec 09, 2022 | 2.26M | 2.23M | 1.32% | 5.05 | 11.73% | 4.67% |
| Nov 25, 2022 | 2.23M | 2.43M | -8.14% | 3.69 | 11.58% | 4.61% |
| Nov 09, 2022 | 2.43M | 2.72M | -10.69% | 4.05 | 12.61% | 5.01% |
| Oct 25, 2022 | 2.72M | 3.26M | -16.65% | 3.68 | 14.49% | 5.67% |
| Oct 11, 2022 | 3.26M | 2.46M | 32.25% | 1.69 | 17.38% | 6.81% |
| Sep 26, 2022 | 2.46M | 2.68M | -8.2% | 4.3 | 13.86% | 5.25% |
| Sep 12, 2022 | 2.68M | 2.62M | 2.55% | 8.11 | 15.09% | 5.72% |
| Aug 24, 2022 | 2.62M | 2.63M | -0.57% | 8.85 | 14.72% | 5.58% |
| Aug 09, 2022 | 2.63M | 3.02M | -12.75% | 9.37 | 14.8% | 5.61% |
| Jul 26, 2022 | 3.02M | 3.03M | -0.28% | 11.39 | 17.08% | 6.45% |
| Jul 12, 2022 | 3.03M | 3.32M | -8.84% | 6.65 | 17.12% | 6.46% |
| Jun 27, 2022 | 3.32M | 3.6M | -7.83% | 9.32 | 18.79% | 7.09% |
| Jun 09, 2022 | 3.6M | 3.45M | 4.41% | 8.75 | 20.38% | 7.69% |
| May 24, 2022 | 3.45M | 2.63M | 31.35% | 5.97 | 19.52% | 7.37% |
| May 10, 2022 | 2.63M | 2.59M | 1.31% | 5.66 | 14.86% | 5.61% |
| Apr 26, 2022 | 2.59M | 2.57M | 0.9% | 7.66 | 14.72% | 5.54% |
| Apr 11, 2022 | 2.57M | 2.8M | -8.27% | 7.71 | 14.59% | 5.5% |
| Mar 24, 2022 | 2.8M | 3.04M | -7.96% | 6.56 | 15.91% | 5.99% |
| Mar 09, 2022 | 3.04M | 3.24M | -5.98% | 6.29 | 17.29% | 6.51% |
| Feb 25, 2022 | 3.24M | 2.88M | 12.55% | 7.92 | 8.86% | 6.93% |
| Feb 09, 2022 | 2.88M | 2.52M | 14.22% | 5.98 | 7.88% | 6.16% |
| Jan 26, 2022 | 2.52M | 2.47M | 1.96% | 4.56 | 6.9% | 5.4% |
| Jan 11, 2022 | 2.47M | 2.17M | 13.68% | 5.2 | 6.77% | 5.29% |
| Dec 27, 2021 | 2.17M | 1.9M | 14.36% | 4.81 | 5.96% | 4.66% |
| Dec 09, 2021 | 1.9M | 1.7M | 11.41% | 4.74 | 5.22% | 4.08% |
| Nov 24, 2021 | 1.7M | 1.88M | -9.28% | 7.09 | 4.68% | 3.66% |
| Nov 09, 2021 | 1.88M | 1.48M | 27.13% | 6.14 | 5.16% | 4.03% |
| Oct 26, 2021 | 1.48M | 1.49M | -1.02% | 5 | 4.07% | 3.18% |
| Oct 11, 2021 | 1.49M | 1.41M | 5.78% | 4.55 | 4.11% | 3.21% |
| Sep 24, 2021 | 1.41M | 1.35M | 4.74% | 4.01 | 4.05% | 3.13% |
| Sep 10, 2021 | 1.35M | 1.44M | -6.54% | 2.73 | 3.87% | 2.99% |
| Aug 24, 2021 | 1.44M | 1.51M | -4.57% | 5.17 | 4.14% | 3.2% |
| Aug 10, 2021 | 1.51M | 1.5M | 0.43% | 4.25 | 4.33% | 3.35% |
| Jul 26, 2021 | 1.5M | 1.63M | -7.67% | 2.67 | 4.33% | 3.35% |
| Jul 12, 2021 | 1.63M | 2.14M | -23.85% | 2.21 | 4.69% | 3.63% |
| Jun 24, 2021 | 2.14M | 1.72M | 24.74% | 3.35 | 6.3% | 4.84% |
| Jun 09, 2021 | 1.72M | 1.79M | -3.79% | 6.04 | 5.05% | 3.89% |
| May 25, 2021 | 1.79M | 2.02M | -11.76% | 5.12 | 5.25% | 4.04% |
| May 11, 2021 | 2.02M | 2.05M | -1.23% | 10.66 | 5.95% | 4.58% |
| Apr 26, 2021 | 2.05M | 1.88M | 8.91% | 9.11 | 6.03% | 4.64% |
| Apr 12, 2021 | 1.88M | 931.9K | 101.91% | 3.36 | 5.53% | 4.26% |
| Mar 24, 2021 | 931.9K | 979.67K | -4.88% | 2.54 | 3.12% | 2.33% |
| Mar 09, 2021 | 979.67K | 709.03K | 38.17% | 1.86 | 3.28% | 2.45% |
| Feb 24, 2021 | 709.03K | 674.36K | 5.14% | 1.15 | 2.32% | 1.77% |
| Feb 09, 2021 | 674.36K | 646.22K | 4.36% | 4.53 | 2.21% | 1.69% |
| Jan 27, 2021 | 646.22K | 731.07K | -11.61% | 4.67 | 2.12% | 1.62% |