Deep Fission Stock Price History
NASDAQ: FISNUtilitiesElectric Utilities: CentralUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
FISN price history at a glance
The price history for Deep Fission (FISN) on this page begins on June 15, 2026, when the stock closed at $14.56; it most recently closed at $4.45 on October 5, 2026. The highest price in this record is $19.00, reached on June 15, 2026; the latest close is 76.6% below that peak. 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 2026
- $19.00
- Date of high
- Jun 15, 2026
- Low since 2026
- $4.40
- Date of low
- Oct 5, 2026
- 52-week high
- $19.00
- 52-week low
- $4.40
- IPO year
- 2026
- Last close
- $4.45
FISN returns
1 week
-20.11%
1 month
-37.41%
3 months
-59.95%
FISN price return, excluding dividends.
FISN daily prices (past year)
| Date | Open | High | Low | Close | Change |
|---|---|---|---|---|---|
| 4.70 | 4.77 | 4.40 | 4.45 | -4.51% | |
| 5.05 | 5.08 | 4.61 | 4.66 | -8.27% | |
| 5.40 | 5.46 | 5.06 | 5.08 | -7.13% | |
| 5.40 | 5.85 | 5.40 | 5.47 | +1.67% | |
| 5.60 | 5.73 | 5.31 | 5.38 | -3.41% | |
| 5.44 | 6.05 | 5.25 | 5.57 | +7.53% | |
| 5.15 | 5.24 | 4.90 | 5.18 | +0.97% | |
| 5.29 | 5.47 | 5.05 | 5.13 | -2.29% | |
| 5.64 | 5.75 | 5.20 | 5.25 | -3.14% | |
| 6.30 | 6.44 | 5.40 | 5.42 | -13.28% | |
| 6.64 | 6.75 | 6.23 | 6.25 | -10.07% | |
| 7.77 | 7.87 | 6.84 | 6.95 | -10.90% | |
| 8.15 | 8.21 | 7.62 | 7.80 | -3.94% | |
| 7.97 | 8.36 | 7.88 | 8.12 | +3.84% | |
| 8.47 | 8.58 | 7.68 | 7.82 | -7.67% | |
| 8.15 | 8.79 | 7.95 | 8.47 | +4.31% | |
| 7.19 | 8.24 | 7.01 | 8.12 | +14.37% | |
| 7.13 | 7.38 | 6.90 | 7.10 | -0.14% | |
| 7.18 | 7.57 | 7.04 | 7.11 | -0.70% | |
| 7.11 | 7.37 | 6.68 | 7.16 | 0.00% | |
| 6.89 | 7.39 | 6.75 | 7.16 | +6.07% | |
| 7.00 | 7.14 | 6.73 | 6.75 | -5.06% | |
| 6.92 | 7.24 | 6.80 | 7.11 | +1.86% | |
| 7.19 | 7.25 | 6.80 | 6.98 | -2.38% | |
| 7.20 | 7.38 | 7.04 | 7.15 | +0.14% | |
| 6.97 | 7.45 | 6.91 | 7.14 | +2.44% | |
| 6.38 | 6.98 | 6.17 | 6.97 | +9.08% | |
| 6.70 | 6.84 | 6.10 | 6.39 | -4.77% | |
| 6.77 | 7.03 | 6.62 | 6.71 | +2.29% | |
| 6.86 | 7.10 | 6.42 | 6.56 | -5.34% | |
| 6.93 | 7.24 | 6.76 | 6.93 | +0.58% | |
| 6.98 | 7.33 | 6.77 | 6.89 | -0.58% | |
| 7.28 | 7.41 | 6.78 | 6.93 | -2.81% | |
| 8.20 | 8.21 | 7.03 | 7.13 | -13.58% | |
| 7.83 | 8.30 | 7.83 | 8.25 | +6.18% | |
| 8.02 | 8.03 | 7.68 | 7.77 | -2.88% | |
| 7.98 | 8.34 | 7.81 | 8.00 | +2.30% | |
| 8.03 | 8.24 | 7.64 | 7.82 | -3.69% | |
| 8.75 | 9.05 | 8.02 | 8.12 | -6.02% | |
| 8.26 | 8.87 | 8.20 | 8.64 | +4.73% | |
| 8.40 | 8.69 | 8.10 | 8.25 | -1.08% | |
| 8.26 | 8.88 | 8.20 | 8.34 | +1.09% | |
| 8.12 | 8.41 | 7.77 | 8.25 | +3.77% | |
| 9.10 | 9.19 | 7.91 | 7.95 | -11.57% | |
| 9.25 | 9.55 | 8.76 | 8.99 | -2.49% | |
| 8.61 | 9.54 | 8.52 | 9.22 | +5.98% | |
| 9.03 | 9.20 | 8.40 | 8.70 | -4.40% | |
| 9.62 | 10.50 | 8.82 | 9.10 | -8.27% | |
| 9.53 | 10.11 | 9.40 | 9.92 | +5.42% | |
| 9.75 | 10.02 | 9.41 | 9.41 | -2.18% | |
| 9.53 | 9.70 | 9.30 | 9.62 | -1.03% | |
| 10.19 | 10.19 | 9.55 | 9.72 | -1.72% | |
| 9.84 | 10.00 | 8.80 | 9.89 | +1.02% | |
| 10.27 | 10.29 | 9.54 | 9.79 | -4.58% | |
| 10.55 | 10.65 | 10.08 | 10.26 | -3.84% | |
| 11.50 | 11.50 | 10.40 | 10.67 | -7.78% | |
| 11.16 | 11.85 | 11.10 | 11.57 | +5.37% | |
| 10.32 | 11.17 | 10.31 | 10.98 | +6.50% | |
| 10.62 | 11.32 | 10.27 | 10.31 | -3.19% | |
| 10.29 | 10.75 | 10.10 | 10.65 | +1.33% | |
| 12.12 | 12.42 | 10.38 | 10.51 | -13.57% | |
| 10.87 | 12.88 | 10.73 | 12.16 | +14.18% | |
| 10.56 | 10.72 | 10.20 | 10.65 | +2.70% | |
| 11.35 | 11.59 | 10.31 | 10.37 | -6.66% | |
| 11.12 | 11.62 | 10.55 | 11.11 | -0.27% | |
| 10.88 | 11.76 | 10.50 | 11.14 | +1.36% | |
| 10.41 | 11.29 | 9.95 | 10.99 | +5.98% | |
| 9.70 | 10.51 | 9.61 | 10.37 | +4.96% | |
| 10.40 | 10.58 | 9.20 | 9.88 | -3.98% | |
| 10.40 | 10.59 | 10.04 | 10.29 | -1.91% | |
| 10.80 | 10.80 | 9.91 | 10.49 | -4.98% | |
| 11.22 | 11.22 | 10.50 | 11.04 | -0.09% | |
| 11.24 | 11.24 | 9.64 | 11.05 | +2.79% | |
| 10.40 | 11.43 | 9.74 | 10.75 | +7.18% | |
| 10.03 | 10.48 | 7.66 | 10.03 | +2.77% | |
| 14.50 | 14.57 | 9.56 | 9.76 | -21.54% | |
| 12.00 | 13.25 | 11.88 | 12.44 | +0.16% | |
| 13.61 | 15.50 | 11.53 | 12.42 | -14.70% | |
| 16.00 | 19.00 | 14.56 | 14.56 | — |
Prices are adjusted for stock splits. See adjusted closing price for how dividends and splits affect history, and the FISN chart for longer ranges.