Phio Pharmaceuticals Stock Price History
NASDAQ: PHIOHealth CareBiotechnology: Pharmaceutical PreparationsUSD
0.9788-0.011 (-1.11%)
At close: Oct 9, 4:00 PM ET · Delayed 15 min
After hours: 0.9558 -2.35%
PHIO price history at a glance
The price history for Phio Pharmaceuticals (PHIO) on this page begins on May 7, 2012, when the stock closed at $2,673,000.00; it most recently closed at $0.9788 on October 5, 2026. The highest price in this record is $6,379,560.00, reached on March 11, 2013; the latest close is 100.0% below that peak. Across the 13 complete calendar years in the table, PHIO finished higher in 1 and lower in 12. Its best year was 2013 (+29.5%) and its worst was 2018 (-93.7%).
Over roughly 14 years the share price changed -100.0%, a -64.2% compound annual price return (excluding dividends). In the last 12 months alone, PHIO has lost 59.8%. Prices are split-adjusted closing prices; daily open, high, low, close and volume for the past year are listed below.
Summary generated from market data by MetaCap's automated system. Methodology
Key price levels
- High since 2012
- $6,379,560.00
- Date of high
- Mar 11, 2013
- Low since 2012
- $0.813
- Date of low
- Feb 2, 2026
- 52-week high
- $4.19
- 52-week low
- $0.813
- Last close
- $0.9731
PHIO returns
1 week
-2.69%
1 month
-5.52%
3 months
-6.43%
6 months
-22.15%
Year to date
-7.32%
1 year
-59.79%
3 years
-92.74%
5 years
-99.46%
PHIO price return, excluding dividends.
PHIO annual returns
| Year | Year-end close | Return |
|---|---|---|
| 2026 | 0.9788 | -10.20% |
| 2025 | 1.09 | -44.67% |
| 2024 | 1.97 | -71.20% |
| 2023 | 6.84 | -82.97% |
| 2022 | 40.18 | -62.80% |
| 2021 | 108.00 | -62.83% |
| 2020 | 290.52 | -74.39% |
| 2019 | 1,134.54 | -45.43% |
| 2018 | 2,079.00 | -93.71% |
| 2017 | 33,026.40 | -22.24% |
| 2016 | 42,471.00 | -81.28% |
| 2015 | 226,908.00 | -76.13% |
| 2014 | 950,400.00 | -47.19% |
| 2013 | 1,799,820.00 | +29.49% |
| 2012* | 1,389,960.00 | -48.00% |
* Partial year: the record begins after the start of 2012; return measured from the first available close.
2026 return is year to date.
PHIO daily prices (past year)
| Date | Open | High | Low | Close | Change |
|---|---|---|---|---|---|
| 0.97 | 0.9924 | 0.9695 | 0.9731 | -2.64% | |
| 0.9944 | 1.02 | 0.9701 | 0.9995 | +0.55% | |
| 1.00 | 1.02 | 0.971 | 0.994 | +0.30% | |
| 1.00 | 1.12 | 0.98 | 0.991 | +0.61% | |
| 1.00 | 1.02 | 0.98 | 0.985 | -1.50% | |
| 1.05 | 1.05 | 1.00 | 1.00 | -2.91% | |
| 1.05 | 1.07 | 1.03 | 1.03 | 0.00% | |
| 1.02 | 1.05 | 1.00 | 1.03 | +1.98% | |
| 1.00 | 1.04 | 0.99 | 1.01 | 0.00% | |
| 1.03 | 1.05 | 0.987 | 1.01 | -0.98% | |
| 1.03 | 1.04 | 0.99 | 1.02 | 0.00% | |
| 1.02 | 1.03 | 1.00 | 1.02 | +2.00% | |
| 1.02 | 1.05 | 0.99 | 1.00 | -0.99% | |
| 1.04 | 1.05 | 1.00 | 1.01 | -1.94% | |
| 1.04 | 1.06 | 1.01 | 1.03 | +0.98% | |
| 1.03 | 1.04 | 0.988 | 1.02 | +2.10% | |
| 1.00 | 1.02 | 0.978 | 0.999 | -2.06% | |
| 1.04 | 1.04 | 0.99 | 1.02 | -0.97% | |
| 1.03 | 1.05 | 1.01 | 1.03 | 0.00% | |
| 1.03 | 1.05 | 1.03 | 1.03 | +1.98% | |
| 1.03 | 1.03 | 0.98 | 1.01 | -1.94% | |
| 1.04 | 1.06 | 1.03 | 1.03 | 0.00% | |
| 1.07 | 1.08 | 1.02 | 1.03 | -4.63% | |
| 1.10 | 1.13 | 1.08 | 1.08 | -2.70% | |
| 1.14 | 1.14 | 1.09 | 1.11 | -1.77% | |
| 1.07 | 1.17 | 1.07 | 1.13 | +2.73% | |
| 1.08 | 1.11 | 1.06 | 1.10 | +0.92% | |
| 1.13 | 1.13 | 1.08 | 1.09 | -3.54% | |
| 1.12 | 1.15 | 1.11 | 1.13 | +0.89% | |
| 1.21 | 1.21 | 1.10 | 1.12 | -6.67% | |
| 1.18 | 1.22 | 1.17 | 1.20 | +0.84% | |
| 1.14 | 1.22 | 1.14 | 1.19 | +1.71% | |
| 1.19 | 1.21 | 1.13 | 1.17 | -0.85% | |
| 1.24 | 1.24 | 1.17 | 1.18 | -2.48% | |
| 1.16 | 1.22 | 1.10 | 1.21 | +5.22% | |
| 1.10 | 1.16 | 1.08 | 1.15 | +9.52% | |
| 1.06 | 1.06 | 1.03 | 1.05 | -0.94% | |
| 1.09 | 1.10 | 1.06 | 1.06 | -2.75% | |
| 1.12 | 1.13 | 1.07 | 1.09 | 0.00% | |
| 1.09 | 1.10 | 1.07 | 1.09 | +0.93% | |
| 1.10 | 1.10 | 1.07 | 1.08 | -0.92% | |
| 1.07 | 1.10 | 1.07 | 1.09 | +2.83% | |
| 1.03 | 1.09 | 1.02 | 1.06 | +1.92% | |
| 0.994 | 1.08 | 0.994 | 1.04 | -1.89% | |
| 1.05 | 1.10 | 1.05 | 1.06 | -0.93% | |
| 1.08 | 1.09 | 1.04 | 1.07 | +0.94% | |
| 1.00 | 1.12 | 1.00 | 1.06 | +2.91% | |
| 1.03 | 1.04 | 0.997 | 1.03 | +0.49% | |
| 1.04 | 1.05 | 1.00 | 1.03 | -0.49% | |
| 0.984 | 1.05 | 0.951 | 1.03 | +4.67% | |
| 1.02 | 1.02 | 0.97 | 0.984 | -2.57% | |
| 1.03 | 1.04 | 1.00 | 1.01 | -3.81% | |
| 1.06 | 1.07 | 1.03 | 1.05 | +0.96% | |
| 1.06 | 1.07 | 1.03 | 1.04 | -2.80% | |
| 1.06 | 1.11 | 1.06 | 1.07 | +0.94% | |
| 1.12 | 1.13 | 1.06 | 1.06 | -6.19% | |
| 1.08 | 1.14 | 1.08 | 1.13 | +4.63% | |
| 1.02 | 1.11 | 0.996 | 1.08 | +4.85% | |
| 0.975 | 1.06 | 0.946 | 1.03 | +3.00% | |
| 0.896 | 1.01 | 0.894 | 1.00 | +12.36% | |
| 0.974 | 1.02 | 0.84 | 0.89 | -13.59% | |
| 0.991 | 1.04 | 0.991 | 1.03 | +3.00% | |
| 1.02 | 1.02 | 0.996 | 1.00 | -1.96% | |
| 1.06 | 1.06 | 1.02 | 1.02 | -1.92% | |
| 1.10 | 1.10 | 1.01 | 1.04 | -3.70% | |
| 1.00 | 1.10 | 1.00 | 1.08 | +6.93% | |
| 1.02 | 1.02 | 0.977 | 1.01 | +2.02% | |
| 0.99 | 1.03 | 0.99 | 0.99 | -1.00% | |
| 1.01 | 1.04 | 1.00 | 1.00 | 0.00% | |
| 1.02 | 1.05 | 1.00 | 1.00 | -2.44% | |
| 1.02 | 1.05 | 1.01 | 1.03 | +4.06% | |
| 0.97 | 1.01 | 0.97 | 0.985 | +1.55% | |
| 0.965 | 1.00 | 0.96 | 0.97 | +1.04% | |
| 1.03 | 1.04 | 0.96 | 0.96 | -5.88% | |
| 1.04 | 1.06 | 1.02 | 1.02 | -1.92% | |
| 1.04 | 1.07 | 1.04 | 1.04 | -0.95% | |
| 1.04 | 1.08 | 1.04 | 1.05 | +1.94% | |
| 1.09 | 1.10 | 1.03 | 1.03 | -4.63% | |
| 1.08 | 1.13 | 1.07 | 1.08 | +1.89% | |
| 1.09 | 1.12 | 1.06 | 1.06 | -3.64% | |
| 1.09 | 1.12 | 1.08 | 1.10 | +2.80% | |
| 1.07 | 1.10 | 1.07 | 1.07 | -0.93% | |
| 1.08 | 1.08 | 1.06 | 1.08 | +1.89% | |
| 1.08 | 1.10 | 1.06 | 1.06 | -1.85% | |
| 1.09 | 1.13 | 1.07 | 1.08 | -0.92% | |
| 1.07 | 1.11 | 1.05 | 1.09 | +2.83% | |
| 1.11 | 1.13 | 1.05 | 1.06 | -7.02% | |
| 1.11 | 1.15 | 1.09 | 1.14 | +2.70% | |
| 1.12 | 1.12 | 1.09 | 1.11 | -0.89% | |
| 1.13 | 1.13 | 1.10 | 1.12 | -0.88% | |
| 1.08 | 1.14 | 1.08 | 1.13 | +1.80% | |
| 1.14 | 1.14 | 1.11 | 1.11 | -2.63% | |
| 1.10 | 1.14 | 1.10 | 1.14 | +3.64% | |
| 1.08 | 1.12 | 1.07 | 1.10 | +1.85% | |
| 1.09 | 1.11 | 1.08 | 1.08 | -0.92% | |
| 1.09 | 1.13 | 1.09 | 1.09 | 0.00% | |
| 1.07 | 1.10 | 1.07 | 1.09 | +0.93% | |
| 1.06 | 1.08 | 1.06 | 1.08 | +1.89% | |
| 1.09 | 1.10 | 1.06 | 1.06 | -1.85% | |
| 1.07 | 1.10 | 1.06 | 1.08 | +0.93% | |
| 1.10 | 1.12 | 1.05 | 1.07 | -4.46% | |
| 1.13 | 1.15 | 1.10 | 1.12 | -0.88% | |
| 1.12 | 1.15 | 1.10 | 1.13 | +2.73% | |
| 1.11 | 1.12 | 1.08 | 1.10 | +1.85% | |
| 1.09 | 1.12 | 1.07 | 1.08 | +0.93% | |
| 1.15 | 1.15 | 1.04 | 1.07 | -6.14% | |
| 1.15 | 1.17 | 1.14 | 1.14 | -0.87% | |
| 1.15 | 1.18 | 1.14 | 1.15 | +1.77% | |
| 1.18 | 1.19 | 1.13 | 1.13 | -2.59% | |
| 1.14 | 1.18 | 1.12 | 1.16 | +1.75% | |
| 1.21 | 1.22 | 1.13 | 1.14 | -6.56% | |
| 1.21 | 1.23 | 1.19 | 1.22 | +3.39% | |
| 1.20 | 1.21 | 1.18 | 1.18 | -1.67% | |
| 1.21 | 1.22 | 1.20 | 1.20 | -0.83% | |
| 1.18 | 1.22 | 1.18 | 1.21 | +1.68% | |
| 1.24 | 1.24 | 1.18 | 1.19 | -3.25% | |
| 1.26 | 1.26 | 1.22 | 1.23 | -1.60% | |
| 1.24 | 1.27 | 1.24 | 1.25 | 0.00% | |
| 1.26 | 1.27 | 1.24 | 1.25 | -1.57% | |
| 1.30 | 1.30 | 1.25 | 1.27 | -1.55% | |
| 1.29 | 1.31 | 1.28 | 1.29 | +1.57% | |
| 1.33 | 1.34 | 1.27 | 1.27 | -3.79% | |
| 1.27 | 1.34 | 1.25 | 1.32 | +2.33% | |
| 1.22 | 1.30 | 1.22 | 1.29 | +4.03% | |
| 1.21 | 1.27 | 1.20 | 1.24 | +2.48% | |
| 1.24 | 1.26 | 1.21 | 1.21 | -3.20% | |
| 1.25 | 1.28 | 1.25 | 1.25 | -3.85% | |
| 1.30 | 1.30 | 1.25 | 1.30 | +4.84% | |
| 1.27 | 1.27 | 1.24 | 1.24 | -1.59% | |
| 1.26 | 1.29 | 1.24 | 1.26 | -1.56% | |
| 1.26 | 1.31 | 1.26 | 1.28 | -1.54% | |
| 1.22 | 1.35 | 1.22 | 1.30 | +6.56% | |
| 1.21 | 1.27 | 1.21 | 1.22 | +1.67% | |
| 1.28 | 1.30 | 1.17 | 1.20 | -4.76% | |
| 1.28 | 1.32 | 1.22 | 1.26 | 0.00% | |
| 1.27 | 1.35 | 1.26 | 1.26 | 0.00% | |
| 1.23 | 1.28 | 1.23 | 1.26 | +3.28% | |
| 1.24 | 1.27 | 1.22 | 1.22 | -2.40% | |
| 1.22 | 1.31 | 1.21 | 1.25 | +2.46% | |
| 1.18 | 1.23 | 1.18 | 1.22 | +3.39% | |
| 1.17 | 1.24 | 1.13 | 1.18 | -1.67% | |
| 1.26 | 1.26 | 1.18 | 1.20 | -5.51% | |
| 1.26 | 1.27 | 1.22 | 1.27 | +0.79% | |
| 1.21 | 1.29 | 1.19 | 1.26 | +7.69% | |
| 1.26 | 1.29 | 1.17 | 1.17 | -6.40% | |
| 1.26 | 1.29 | 1.23 | 1.25 | -0.79% | |
| 1.23 | 1.26 | 1.19 | 1.26 | +2.44% | |
| 1.22 | 1.25 | 1.18 | 1.23 | +1.65% | |
| 1.15 | 1.25 | 1.14 | 1.21 | +4.31% | |
| 1.17 | 1.23 | 1.15 | 1.16 | -0.85% | |
| 1.16 | 1.22 | 1.15 | 1.17 | +1.74% | |
| 1.05 | 1.15 | 1.04 | 1.15 | +13.86% | |
| 1.00 | 1.05 | 0.978 | 1.01 | -0.98% | |
| 1.07 | 1.08 | 1.01 | 1.02 | -10.53% | |
| 1.06 | 1.16 | 1.06 | 1.14 | +6.54% | |
| 1.06 | 1.11 | 1.03 | 1.07 | +1.90% | |
| 1.09 | 1.12 | 1.05 | 1.05 | -2.78% | |
| 1.04 | 1.12 | 1.01 | 1.08 | +5.88% | |
| 1.03 | 1.06 | 1.00 | 1.02 | -0.97% | |
| 1.15 | 1.16 | 1.02 | 1.03 | -9.65% | |
| 1.19 | 1.26 | 1.07 | 1.14 | -1.72% | |
| 1.42 | 1.46 | 1.12 | 1.16 | -21.09% | |
| 1.58 | 1.63 | 1.40 | 1.47 | -10.91% | |
| 1.22 | 1.88 | 1.22 | 1.65 | +35.25% | |
| 1.28 | 1.34 | 1.20 | 1.22 | -5.43% | |
| 1.29 | 1.44 | 1.19 | 1.29 | +15.18% | |
| 1.41 | 1.48 | 1.12 | 1.12 | +24.44% | |
| 0.93 | 0.93 | 0.881 | 0.90 | -2.17% | |
| 0.84 | 0.93 | 0.84 | 0.92 | +7.35% | |
| 0.91 | 0.916 | 0.813 | 0.857 | -7.35% | |
| 0.98 | 0.98 | 0.914 | 0.925 | -5.52% | |
| 0.98 | 1.00 | 0.94 | 0.979 | -0.81% | |
| 1.00 | 1.01 | 0.97 | 0.987 | -2.28% | |
| 1.02 | 1.02 | 1.00 | 1.01 | -0.98% | |
| 1.03 | 1.03 | 1.00 | 1.02 | 0.00% | |
| 1.04 | 1.05 | 1.01 | 1.02 | -0.97% | |
| 1.03 | 1.06 | 1.01 | 1.03 | -0.96% | |
| 1.09 | 1.09 | 1.03 | 1.04 | -4.59% | |
| 1.09 | 1.09 | 1.05 | 1.09 | +0.93% | |
| 1.06 | 1.10 | 1.05 | 1.08 | +3.85% | |
| 1.06 | 1.07 | 1.01 | 1.04 | -3.70% | |
| 1.10 | 1.22 | 1.01 | 1.08 | -5.26% | |
| 1.14 | 1.15 | 1.11 | 1.14 | +0.88% | |
| 1.14 | 1.14 | 1.09 | 1.13 | +0.89% | |
| 1.17 | 1.17 | 1.12 | 1.12 | -5.08% | |
| 1.18 | 1.18 | 1.14 | 1.18 | -0.84% | |
| 1.18 | 1.19 | 1.12 | 1.19 | +2.59% | |
| 1.20 | 1.20 | 1.14 | 1.16 | -2.52% | |
| 1.20 | 1.21 | 1.17 | 1.19 | -1.65% | |
| 1.13 | 1.22 | 1.12 | 1.21 | +5.22% | |
| 1.20 | 1.20 | 1.12 | 1.15 | -1.71% | |
| 1.10 | 1.20 | 1.10 | 1.17 | +7.34% | |
| 1.05 | 1.10 | 1.02 | 1.09 | +3.81% | |
| 1.02 | 1.05 | 1.02 | 1.05 | +2.94% | |
| 1.05 | 1.06 | 1.02 | 1.02 | -3.77% | |
| 1.08 | 1.08 | 1.04 | 1.06 | -1.85% | |
| 1.07 | 1.08 | 1.03 | 1.08 | +2.86% | |
| 1.02 | 1.05 | 1.02 | 1.05 | +1.94% | |
| 1.10 | 1.10 | 1.00 | 1.03 | -6.36% | |
| 1.08 | 1.18 | 1.08 | 1.10 | +2.80% | |
| 1.09 | 1.10 | 1.04 | 1.07 | +0.94% | |
| 1.05 | 1.13 | 1.05 | 1.06 | -0.93% | |
| 1.07 | 1.13 | 1.06 | 1.07 | -0.93% | |
| 1.07 | 1.09 | 1.04 | 1.08 | -0.92% | |
| 1.14 | 1.14 | 1.08 | 1.09 | -2.68% | |
| 1.16 | 1.17 | 1.12 | 1.12 | -1.75% | |
| 1.17 | 1.18 | 1.14 | 1.14 | -2.56% | |
| 1.14 | 1.20 | 1.13 | 1.17 | +1.74% | |
| 1.16 | 1.17 | 1.07 | 1.15 | +1.77% | |
| 1.31 | 1.31 | 1.12 | 1.13 | -13.74% | |
| 1.37 | 1.43 | 1.31 | 1.31 | -2.96% | |
| 1.29 | 1.37 | 1.26 | 1.35 | +4.65% | |
| 1.22 | 1.32 | 1.19 | 1.29 | +4.88% | |
| 1.24 | 1.27 | 1.21 | 1.23 | -1.60% | |
| 1.23 | 1.30 | 1.22 | 1.25 | -0.79% | |
| 1.24 | 1.29 | 1.22 | 1.26 | +2.44% | |
| 1.21 | 1.29 | 1.20 | 1.23 | +2.50% | |
| 1.15 | 1.24 | 1.13 | 1.20 | +3.45% | |
| 1.15 | 1.25 | 1.13 | 1.16 | +3.57% | |
| 1.21 | 1.21 | 1.08 | 1.12 | -5.88% | |
| 1.25 | 1.29 | 1.18 | 1.19 | -4.80% | |
| 1.27 | 1.32 | 1.20 | 1.25 | -1.57% | |
| 1.30 | 1.31 | 1.21 | 1.27 | -3.79% | |
| 1.30 | 1.33 | 1.26 | 1.32 | +1.54% | |
| 1.36 | 1.40 | 1.28 | 1.30 | -9.09% | |
| 1.58 | 1.58 | 1.36 | 1.43 | -9.49% | |
| 1.60 | 1.64 | 1.52 | 1.58 | -1.86% | |
| 1.55 | 1.64 | 1.50 | 1.61 | +3.87% | |
| 1.53 | 1.62 | 1.52 | 1.55 | -0.64% | |
| 1.53 | 1.59 | 1.35 | 1.56 | +5.41% | |
| 1.53 | 1.59 | 1.45 | 1.48 | -6.33% | |
| 1.61 | 1.69 | 1.51 | 1.58 | -3.07% | |
| 1.77 | 1.80 | 1.60 | 1.63 | -12.37% | |
| 3.47 | 4.19 | 1.72 | 1.86 | -9.27% | |
| 2.01 | 2.06 | 1.99 | 2.05 | -0.49% | |
| 2.08 | 2.10 | 2.00 | 2.06 | -0.24% | |
| 2.14 | 2.15 | 2.02 | 2.07 | -4.40% | |
| 2.18 | 2.18 | 2.12 | 2.16 | -0.09% | |
| 2.13 | 2.18 | 2.08 | 2.16 | +1.98% | |
| 2.10 | 2.16 | 2.09 | 2.12 | -0.93% | |
| 2.09 | 2.16 | 2.06 | 2.14 | +1.42% | |
| 2.11 | 2.12 | 2.06 | 2.11 | -0.94% | |
| 2.16 | 2.16 | 2.11 | 2.13 | -1.39% | |
| 2.14 | 2.17 | 2.11 | 2.16 | +2.37% | |
| 2.12 | 2.16 | 2.09 | 2.11 | -0.47% | |
| 2.20 | 2.25 | 2.10 | 2.12 | -5.36% | |
| 2.25 | 2.25 | 2.16 | 2.24 | +0.90% | |
| 2.13 | 2.23 | 2.07 | 2.22 | +1.83% | |
| 2.20 | 2.25 | 2.17 | 2.18 | -1.00% | |
| 2.37 | 2.40 | 2.20 | 2.20 | -6.69% | |
| 2.45 | 2.45 | 2.33 | 2.36 | -2.48% | |
| 2.37 | 2.45 | 2.33 | 2.42 | — |
Prices are adjusted for stock splits. See adjusted closing price for how dividends and splits affect history, and the PHIO chart for longer ranges.