Sionna Therapeutics Stock Price History
NASDAQ: SIONHealth CareBiotechnology: Pharmaceutical PreparationsUSD
4.900.00 (0.00%)
At close: Oct 9, 4:00 PM ET · Delayed 15 min
SION price history at a glance
The price history for Sionna Therapeutics (SION) on this page begins on February 3, 2025, when the stock closed at $25.00; it most recently closed at $4.90 on October 5, 2026. The highest price in this record is $54.97, reached on August 3, 2026; the latest close is 91.1% below that peak. In the last 12 months alone, SION has lost 82.7%.
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 2025
- $54.97
- Date of high
- Aug 3, 2026
- Low since 2025
- $4.01
- Date of low
- Aug 10, 2026
- 52-week high
- $54.97
- 52-week low
- $4.01
- IPO year
- 2025
- Last close
- $4.90
SION returns
1 week
-0.20%
1 month
-34.49%
3 months
-89.18%
6 months
-87.07%
Year to date
-88.09%
1 year
-82.72%
SION price return, excluding dividends.
SION annual returns
| Year | Year-end close | Return |
|---|---|---|
| 2026 | 4.90 | -87.50% |
| 2025* | 39.21 | +56.84% |
* Partial year: the record begins after the start of 2025; return measured from the first available close.
2026 return is year to date.
SION daily prices (past year)
| Date | Open | High | Low | Close | Change |
|---|---|---|---|---|---|
| 4.93 | 5.12 | 4.83 | 4.90 | 0.00% | |
| 4.78 | 4.97 | 4.65 | 4.90 | +1.66% | |
| 4.68 | 4.87 | 4.61 | 4.82 | +1.47% | |
| 4.88 | 4.88 | 4.52 | 4.75 | -2.06% | |
| 4.95 | 4.96 | 4.63 | 4.85 | -1.22% | |
| 5.19 | 5.19 | 4.86 | 4.91 | -3.73% | |
| 5.26 | 5.33 | 5.03 | 5.10 | -3.04% | |
| 5.19 | 5.34 | 5.02 | 5.26 | +2.14% | |
| 5.15 | 5.19 | 5.03 | 5.15 | +0.59% | |
| 5.17 | 5.25 | 5.05 | 5.12 | -2.10% | |
| 5.28 | 5.30 | 5.09 | 5.23 | 0.00% | |
| 5.50 | 5.59 | 5.15 | 5.23 | -5.08% | |
| 6.03 | 6.12 | 5.32 | 5.51 | -8.47% | |
| 5.99 | 6.17 | 5.84 | 6.02 | +0.33% | |
| 6.00 | 6.13 | 5.70 | 6.00 | +0.67% | |
| 7.12 | 7.19 | 5.90 | 5.96 | -16.99% | |
| 7.27 | 7.73 | 7.15 | 7.18 | +1.99% | |
| 6.95 | 7.37 | 6.91 | 7.04 | +2.33% | |
| 7.87 | 8.00 | 6.85 | 6.88 | -16.71% | |
| 7.84 | 8.54 | 7.84 | 8.26 | +5.22% | |
| 7.79 | 8.03 | 7.47 | 7.85 | +3.02% | |
| 7.40 | 7.75 | 7.12 | 7.62 | +1.87% | |
| 7.27 | 7.55 | 7.17 | 7.48 | +2.47% | |
| 7.13 | 7.56 | 6.89 | 7.30 | +1.67% | |
| 6.68 | 7.22 | 6.62 | 7.18 | +6.37% | |
| 7.31 | 7.56 | 6.70 | 6.75 | -7.66% | |
| 6.63 | 7.35 | 6.27 | 7.31 | +13.16% | |
| 5.95 | 6.48 | 5.93 | 6.46 | +7.13% | |
| 5.87 | 6.08 | 5.75 | 6.03 | +2.73% | |
| 5.97 | 6.06 | 5.82 | 5.87 | -3.14% | |
| 6.14 | 6.25 | 5.97 | 6.06 | -1.78% | |
| 6.20 | 6.29 | 6.02 | 6.17 | -1.28% | |
| 5.60 | 6.30 | 5.58 | 6.25 | +11.81% | |
| 5.29 | 5.61 | 5.21 | 5.59 | +5.67% | |
| 5.54 | 5.72 | 5.27 | 5.29 | -4.17% | |
| 6.27 | 6.27 | 5.51 | 5.52 | -11.68% | |
| 6.09 | 6.28 | 5.88 | 6.25 | +5.22% | |
| 5.75 | 5.98 | 5.60 | 5.94 | +0.51% | |
| 6.47 | 6.80 | 5.82 | 5.91 | -8.51% | |
| 6.24 | 6.66 | 6.15 | 6.46 | -1.22% | |
| 6.29 | 6.75 | 6.05 | 6.54 | +4.64% | |
| 4.99 | 6.40 | 4.98 | 6.25 | +22.55% | |
| 4.51 | 5.49 | 4.49 | 5.10 | +13.33% | |
| 4.85 | 5.00 | 4.01 | 4.50 | -91.18% | |
| 50.86 | 54.97 | 49.30 | 51.04 | +2.88% | |
| 47.11 | 50.80 | 47.08 | 49.61 | +4.80% | |
| 50.20 | 51.91 | 46.92 | 47.34 | -5.21% | |
| 50.16 | 51.73 | 48.52 | 49.94 | +1.38% | |
| 46.86 | 49.49 | 45.57 | 49.26 | +4.52% | |
| 46.68 | 47.62 | 44.27 | 47.13 | +0.75% | |
| 44.69 | 47.28 | 44.64 | 46.78 | +4.40% | |
| 46.81 | 46.84 | 44.63 | 44.81 | -3.74% | |
| 45.41 | 46.69 | 44.11 | 46.55 | +2.58% | |
| 46.03 | 47.89 | 45.11 | 45.38 | -0.70% | |
| 44.31 | 46.40 | 43.41 | 45.70 | +3.72% | |
| 44.39 | 46.45 | 43.84 | 44.06 | -2.15% | |
| 46.92 | 47.71 | 44.23 | 45.03 | -4.62% | |
| 45.24 | 48.00 | 45.24 | 47.21 | +3.33% | |
| 50.20 | 51.57 | 44.78 | 45.69 | -7.53% | |
| 44.72 | 51.00 | 43.12 | 49.41 | +9.10% | |
| 44.17 | 48.22 | 43.47 | 45.29 | +2.05% | |
| 42.33 | 45.37 | 41.69 | 44.38 | +4.20% | |
| 44.24 | 45.01 | 42.39 | 42.59 | -3.09% | |
| 45.40 | 45.49 | 42.73 | 43.95 | -2.96% | |
| 44.90 | 45.41 | 42.24 | 45.29 | +0.78% | |
| 44.00 | 45.91 | 43.65 | 44.94 | +2.14% | |
| 44.48 | 46.98 | 43.29 | 44.00 | -2.07% | |
| 43.67 | 46.64 | 43.00 | 44.93 | +4.20% | |
| 44.01 | 44.38 | 42.39 | 43.12 | -1.98% | |
| 42.05 | 44.18 | 41.16 | 43.99 | +5.64% | |
| 43.63 | 44.28 | 40.92 | 41.64 | -5.34% | |
| 43.33 | 45.00 | 42.40 | 43.99 | +2.37% | |
| 42.29 | 43.48 | 41.72 | 42.97 | +1.87% | |
| 42.56 | 44.03 | 40.69 | 42.18 | -1.38% | |
| 41.09 | 44.30 | 40.44 | 42.77 | +4.09% | |
| 39.81 | 41.28 | 39.18 | 41.09 | +3.06% | |
| 38.40 | 42.31 | 37.28 | 39.87 | +2.68% | |
| 37.89 | 40.02 | 37.87 | 38.83 | +4.10% | |
| 38.28 | 38.56 | 36.63 | 37.30 | +1.55% | |
| 34.81 | 37.11 | 33.99 | 36.73 | +5.70% | |
| 36.01 | 36.21 | 34.43 | 34.75 | -3.47% | |
| 36.54 | 37.82 | 35.53 | 36.00 | +0.22% | |
| 36.05 | 37.17 | 35.50 | 35.92 | -0.36% | |
| 34.20 | 36.84 | 33.72 | 36.05 | +5.94% | |
| 33.44 | 35.29 | 32.84 | 34.03 | +1.01% | |
| 34.37 | 35.26 | 32.33 | 33.69 | +0.54% | |
| 35.29 | 35.44 | 32.26 | 33.51 | -5.26% | |
| 37.55 | 37.95 | 35.25 | 35.37 | -6.38% | |
| 36.98 | 39.33 | 36.61 | 37.78 | +2.94% | |
| 36.50 | 37.37 | 35.66 | 36.70 | +0.60% | |
| 40.22 | 41.91 | 36.46 | 36.48 | -10.81% | |
| 41.87 | 42.07 | 38.92 | 40.90 | -4.48% | |
| 42.96 | 43.77 | 42.15 | 42.82 | +0.05% | |
| 43.43 | 44.61 | 42.39 | 42.80 | -1.45% | |
| 43.46 | 44.49 | 42.95 | 43.43 | +1.28% | |
| 41.68 | 43.16 | 40.53 | 42.88 | +4.25% | |
| 41.81 | 43.42 | 40.81 | 41.13 | -1.49% | |
| 39.19 | 41.80 | 38.65 | 41.75 | +5.70% | |
| 38.39 | 39.71 | 36.90 | 39.50 | +4.83% | |
| 38.97 | 39.19 | 37.48 | 37.68 | -3.98% | |
| 41.46 | 41.46 | 38.16 | 39.24 | -2.44% | |
| 41.87 | 42.55 | 40.07 | 40.22 | -5.96% | |
| 42.70 | 44.22 | 41.50 | 42.77 | -0.81% | |
| 40.78 | 43.54 | 40.24 | 43.12 | +5.32% | |
| 45.07 | 46.07 | 40.75 | 40.94 | -10.90% | |
| 44.68 | 48.45 | 44.51 | 45.95 | +3.89% | |
| 43.93 | 45.10 | 43.36 | 44.23 | +2.12% | |
| 43.35 | 45.80 | 42.33 | 43.31 | +0.05% | |
| 41.15 | 43.86 | 40.43 | 43.29 | +5.66% | |
| 41.53 | 43.73 | 40.42 | 40.97 | +1.29% | |
| 38.64 | 41.45 | 38.64 | 40.45 | +3.32% | |
| 38.57 | 40.30 | 38.07 | 39.15 | +1.16% | |
| 37.82 | 38.92 | 37.67 | 38.70 | +3.39% | |
| 39.01 | 40.30 | 36.50 | 37.43 | -5.46% | |
| 39.68 | 41.15 | 38.58 | 39.59 | +0.97% | |
| 38.02 | 42.21 | 37.97 | 39.21 | +2.89% | |
| 38.35 | 38.61 | 35.10 | 38.11 | -0.63% | |
| 43.08 | 44.12 | 37.80 | 38.35 | -11.23% | |
| 41.81 | 43.63 | 41.72 | 43.20 | +3.37% | |
| 43.01 | 43.41 | 41.34 | 41.79 | -1.99% | |
| 43.54 | 44.71 | 41.98 | 42.64 | -2.07% | |
| 46.13 | 46.46 | 43.31 | 43.54 | -3.76% | |
| 44.41 | 46.06 | 42.86 | 45.24 | +0.33% | |
| 44.23 | 46.10 | 42.62 | 45.09 | +4.13% | |
| 41.86 | 44.71 | 41.12 | 43.30 | +3.66% | |
| 37.95 | 41.84 | 36.91 | 41.77 | +10.24% | |
| 38.82 | 38.82 | 36.24 | 37.89 | -2.57% | |
| 36.75 | 40.04 | 36.73 | 38.89 | +5.25% | |
| 38.36 | 38.37 | 36.18 | 36.95 | +0.52% | |
| 37.15 | 38.61 | 35.39 | 36.76 | -1.66% | |
| 40.09 | 40.43 | 37.28 | 37.38 | -7.68% | |
| 40.79 | 42.62 | 40.19 | 40.49 | -1.96% | |
| 40.16 | 42.30 | 40.00 | 41.30 | +3.02% | |
| 37.49 | 41.61 | 37.49 | 40.09 | +9.36% | |
| 36.18 | 37.76 | 35.36 | 36.66 | +1.38% | |
| 37.04 | 38.22 | 36.01 | 36.16 | -4.74% | |
| 37.43 | 38.71 | 35.93 | 37.96 | +2.37% | |
| 34.95 | 38.20 | 34.95 | 37.08 | +6.67% | |
| 35.81 | 36.18 | 33.65 | 34.76 | -4.58% | |
| 36.99 | 38.29 | 35.64 | 36.43 | +0.11% | |
| 35.45 | 37.41 | 34.81 | 36.39 | +2.54% | |
| 34.16 | 36.17 | 33.20 | 35.49 | +3.17% | |
| 35.57 | 36.42 | 34.02 | 34.40 | -4.02% | |
| 37.17 | 37.74 | 34.35 | 35.84 | -3.58% | |
| 37.65 | 39.03 | 36.59 | 37.17 | -0.40% | |
| 36.68 | 37.95 | 36.21 | 37.32 | +1.74% | |
| 37.63 | 37.87 | 34.63 | 36.68 | -4.43% | |
| 37.63 | 39.00 | 37.63 | 38.38 | +0.79% | |
| 37.63 | 39.17 | 37.60 | 38.08 | +1.47% | |
| 35.58 | 38.06 | 35.58 | 37.53 | +4.45% | |
| 32.85 | 36.23 | 32.77 | 35.93 | +3.96% | |
| 34.13 | 34.87 | 32.72 | 34.56 | -0.03% | |
| 34.19 | 35.93 | 33.61 | 34.57 | +1.41% | |
| 33.92 | 34.77 | 32.61 | 34.09 | +0.50% | |
| 32.89 | 35.10 | 32.57 | 33.92 | -7.17% | |
| 37.25 | 38.32 | 36.24 | 36.54 | -3.84% | |
| 38.06 | 38.37 | 36.74 | 38.00 | -0.08% | |
| 37.60 | 39.32 | 37.00 | 38.03 | +1.90% | |
| 36.99 | 38.84 | 36.11 | 37.32 | +3.38% | |
| 34.99 | 38.12 | 34.72 | 36.10 | +1.72% | |
| 37.12 | 37.50 | 35.46 | 35.49 | -4.95% | |
| 37.43 | 38.18 | 36.65 | 37.34 | -1.03% | |
| 37.64 | 38.91 | 36.95 | 37.73 | -0.79% | |
| 37.53 | 38.51 | 37.24 | 38.03 | +1.36% | |
| 37.64 | 39.87 | 37.02 | 37.52 | -0.32% | |
| 36.30 | 38.86 | 36.07 | 37.64 | +3.04% | |
| 38.05 | 38.92 | 35.67 | 36.53 | -3.91% | |
| 36.67 | 38.56 | 35.70 | 38.02 | +3.25% | |
| 35.97 | 37.20 | 35.02 | 36.82 | +1.97% | |
| 35.23 | 38.20 | 34.87 | 36.11 | +2.44% | |
| 40.44 | 41.62 | 32.46 | 35.25 | -14.68% | |
| 44.50 | 44.50 | 41.08 | 41.32 | -7.12% | |
| 44.42 | 44.88 | 42.69 | 44.48 | +1.90% | |
| 42.06 | 44.99 | 40.89 | 43.65 | +3.29% | |
| 42.05 | 43.00 | 40.71 | 42.26 | -0.42% | |
| 42.72 | 43.75 | 41.51 | 42.44 | +0.74% | |
| 43.81 | 44.19 | 41.98 | 42.13 | -2.93% | |
| 42.14 | 43.77 | 42.08 | 43.40 | +1.88% | |
| 40.91 | 42.71 | 40.32 | 42.60 | +0.52% | |
| 41.30 | 43.14 | 41.30 | 42.38 | +1.46% | |
| 40.29 | 42.64 | 39.99 | 41.77 | +2.40% | |
| 40.04 | 41.50 | 39.11 | 40.79 | +1.95% | |
| 38.32 | 40.98 | 37.70 | 40.01 | +2.30% | |
| 38.90 | 40.97 | 38.52 | 39.11 | +0.67% | |
| 41.48 | 41.48 | 37.82 | 38.85 | -5.66% | |
| 36.89 | 41.73 | 36.12 | 41.18 | +11.87% | |
| 35.96 | 37.17 | 34.63 | 36.81 | +1.29% | |
| 39.03 | 39.03 | 34.81 | 36.34 | -7.41% | |
| 36.79 | 39.70 | 36.79 | 39.25 | +7.24% | |
| 42.70 | 42.71 | 35.95 | 36.60 | -15.30% | |
| 38.14 | 43.30 | 37.77 | 43.21 | +16.09% | |
| 40.39 | 41.65 | 37.08 | 37.22 | -8.89% | |
| 39.00 | 40.92 | 38.22 | 40.85 | +4.18% | |
| 41.46 | 41.56 | 38.93 | 39.21 | -4.69% | |
| 41.00 | 42.54 | 40.93 | 41.14 | -0.60% | |
| 42.43 | 43.50 | 41.00 | 41.39 | -3.32% | |
| 43.70 | 45.00 | 42.80 | 42.81 | -2.04% | |
| 43.43 | 44.49 | 40.58 | 43.70 | -0.74% | |
| 44.03 | 44.70 | 43.82 | 44.03 | +1.35% | |
| 42.67 | 43.78 | 41.59 | 43.44 | +2.40% | |
| 42.07 | 42.90 | 40.48 | 42.42 | +0.12% | |
| 43.70 | 45.00 | 42.24 | 42.37 | -4.16% | |
| 43.91 | 44.52 | 42.43 | 44.21 | +2.60% | |
| 42.81 | 44.61 | 41.93 | 43.09 | +0.47% | |
| 43.05 | 43.71 | 41.18 | 42.89 | +0.30% | |
| 43.41 | 44.99 | 42.05 | 42.76 | -0.02% | |
| 41.63 | 43.20 | 41.32 | 42.77 | +2.52% | |
| 40.78 | 43.15 | 40.75 | 41.72 | +1.24% | |
| 41.02 | 41.79 | 40.37 | 41.21 | -0.91% | |
| 40.99 | 42.10 | 40.22 | 41.59 | +2.14% | |
| 40.13 | 42.05 | 39.91 | 40.72 | +1.07% | |
| 41.05 | 42.02 | 39.75 | 40.29 | -1.44% | |
| 41.16 | 42.35 | 40.48 | 40.88 | -0.68% | |
| 39.00 | 43.90 | 37.54 | 41.16 | +5.51% | |
| 38.75 | 40.53 | 38.02 | 39.01 | +0.13% | |
| 40.76 | 41.11 | 35.42 | 38.96 | -10.58% | |
| 43.20 | 43.85 | 41.87 | 43.57 | -0.50% | |
| 44.02 | 44.80 | 43.53 | 43.79 | -1.11% | |
| 43.94 | 44.71 | 43.29 | 44.28 | -0.23% | |
| 44.00 | 45.00 | 43.26 | 44.38 | +1.65% | |
| 38.68 | 43.93 | 38.68 | 43.66 | +12.12% | |
| 38.74 | 40.51 | 38.00 | 38.94 | +1.38% | |
| 40.12 | 40.60 | 38.37 | 38.41 | -1.81% | |
| 39.71 | 40.12 | 36.81 | 39.12 | -2.03% | |
| 37.70 | 42.62 | 37.70 | 39.93 | +7.92% | |
| 35.64 | 37.76 | 35.47 | 37.00 | +3.12% | |
| 36.16 | 36.18 | 34.70 | 35.88 | -1.91% | |
| 36.47 | 37.98 | 35.84 | 36.58 | +0.33% | |
| 35.89 | 36.88 | 34.88 | 36.46 | +1.93% | |
| 35.12 | 36.41 | 34.34 | 35.77 | +3.05% | |
| 34.40 | 35.01 | 32.65 | 34.71 | +0.90% | |
| 34.97 | 35.32 | 33.52 | 34.40 | -1.94% | |
| 35.55 | 35.55 | 32.40 | 35.08 | -1.57% | |
| 35.35 | 36.64 | 33.99 | 35.64 | -1.16% | |
| 37.16 | 39.49 | 34.69 | 36.06 | -5.63% | |
| 37.55 | 39.26 | 37.55 | 38.21 | +0.53% | |
| 37.31 | 38.40 | 37.15 | 38.01 | +1.31% | |
| 39.26 | 39.99 | 36.06 | 37.52 | -4.89% | |
| 37.38 | 40.08 | 37.38 | 39.45 | +2.92% | |
| 39.34 | 39.90 | 37.06 | 38.33 | -2.24% | |
| 40.33 | 40.39 | 38.68 | 39.21 | -0.98% | |
| 38.85 | 42.48 | 38.85 | 39.60 | +1.80% | |
| 41.47 | 42.24 | 36.07 | 38.90 | -8.47% | |
| 32.19 | 43.20 | 32.19 | 42.50 | +31.99% | |
| 32.34 | 32.83 | 31.06 | 32.20 | +0.85% | |
| 32.50 | 33.56 | 31.33 | 31.93 | -2.41% | |
| 30.14 | 34.00 | 29.49 | 32.72 | +5.86% | |
| 29.95 | 31.47 | 29.87 | 30.91 | +3.24% | |
| 29.28 | 29.95 | 28.92 | 29.94 | +2.15% | |
| 29.68 | 31.03 | 28.89 | 29.31 | -0.37% | |
| 28.44 | 30.14 | 27.72 | 29.42 | +3.77% | |
| 28.39 | 28.51 | 24.65 | 28.35 | — |
Prices are adjusted for stock splits. See adjusted closing price for how dividends and splits affect history, and the SION chart for longer ranges.