Loading the section
The price of Deep Fission, Inc. (FISN) on October 9, 2026 is 4.49 USD, -3.71% on the day. Over 52 weeks the stock traded between 4.61 USD and 19.00 USD; the price now sits 0% of the way up that range. Market capitalization is 28.43 billion USD, rank 8 among 42 stocks of the same industry with a known capitalization.
Prices delayed by 15 minutes
Next earnings report: 02 November 2026 · Earnings calendar
Deep Fission, Inc. trades on Nasdaq under the ticker FISN. The company belongs to the Utilities sector. The trading history on this page starts on 18 June 2026.
Over the past 52 weeks FISN has traded between 4.61 $ and 19.00 $. As of 09 October 2026 the price stood 0.35 % of the way from the 52-week low to the high.
The company reported a loss over the last four quarters, so a price-to-earnings ratio is not calculated. Price to book is 323, above the sector median of 1.8. Calculated from reports for the period ending 31 March 2026.
FISN has a return on equity of −89.65 %, below the sector median of 8.77 %. Return on assets is −85.85 %, below the sector median of 2.46 %.
| Date | Open | High | Low | Close | Volume, shares |
|---|---|---|---|---|---|
| 08 October 2026 | 5.05 | 5.08 | 4.61 | 4.66 | 477,200 |
| 07 October 2026 | 5.40 | 5.46 | 5.06 | 5.08 | 194,900 |
| 06 October 2026 | 5.40 | 5.85 | 5.40 | 5.47 | 277,700 |
| 05 October 2026 | 5.60 | 5.73 |
The series is stated in the current share scale after splits; dividends are not included in the price
Based on the last 12 months of reports, through 31 March 2026
The sector median covers every company in the sector on the US market, loss-making ones included.
Address:2831 GARBER STREET, BERKELEY, CA, 94705, US
| 389M |
| EIXEdison International | 55.30 | +1.84 % | 387M |
| NRGNRG Energy, Inc. | 107.22 | +0.84 % | 320M |
| TLNTalen Energy Corporation | 378.57 | +5.39 % | 315M |
| DDominion Energy, Inc. | 61.64 | −0.18 % | 310M |
| 5.31 |
| 5.38 |
| 197,000 |
| 02 October 2026 | 5.44 | 6.05 | 5.25 | 5.57 | 520,700 |
| 01 October 2026 | 5.15 | 5.24 | 4.90 | 5.18 | 336,500 |
| 30 September 2026 | 5.29 | 5.47 | 5.05 | 5.13 | 281,900 |
| 29 September 2026 | 5.64 | 5.75 | 5.20 | 5.25 | 436,600 |
| 28 September 2026 | 6.30 | 6.44 | 5.40 | 5.42 | 579,100 |
| 25 September 2026 | 6.64 | 6.75 | 6.23 | 6.25 | 578,000 |
| 24 September 2026 | 7.77 | 7.87 | 6.84 | 6.95 | 710,100 |
| 23 September 2026 | 8.15 | 8.21 | 7.62 | 7.80 | 316,300 |
| 22 September 2026 | 7.97 | 8.36 | 7.88 | 8.12 | 407,200 |
| 21 September 2026 | 8.47 | 8.58 | 7.68 | 7.82 | 294,300 |
| 18 September 2026 | 8.15 | 8.79 | 7.95 | 8.47 | 2M |
| 17 September 2026 | 7.19 | 8.24 | 7.01 | 8.12 | 344,100 |
| 16 September 2026 | 7.13 | 7.38 | 6.90 | 7.10 | 214,600 |
| 15 September 2026 | 7.18 | 7.57 | 7.04 | 7.11 | 164,000 |
| 14 September 2026 | 7.11 | 7.37 | 6.68 | 7.16 | 244,700 |
| 11 September 2026 | 6.89 | 7.39 | 6.75 | 7.16 | 221,500 |