# Deep Fission, Inc.: overview FISN · Nasdaq · CIK 1918102 · [Utilities](/sectors/utilities.md) · fiscal year ends Dec 31 Pages: [Overview](/companies/fisn.md) · [Financials](/companies/fisn/financials.md) · [Filings](/companies/fisn/filings.md) · [Insiders](/companies/fisn/insiders.md) Revenue is not reported in this company’s XBRL financial statements. ## Last eight quarters | Line item | Unit | Q3 FY2024 (2024-09-30) | Q4 FY2024 (2024-12-31) | Q1 FY2025 (2025-03-31) | Q2 FY2025 (2025-06-30) | Q3 FY2025 (2025-09-30) | Q4 FY2025 (2025-12-31) | Q1 FY2026 (2026-03-31) | Q2 FY2026 (2026-06-30) | | --- | --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | | Revenue | $m | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported | | Gross margin | % | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported | | Operating margin | % | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported | | Net margin | % | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported | | Diluted EPS | $ per share | [(0.09)](/filings/0001104659-26-043870.md) | not reported | [(0.19)](/filings/0001104659-26-057835.md) | [(0.27)](/filings/0001104659-26-089884.md) | [(1.94)](/filings/0001104659-26-043870.md) | not reported | [(0.39)](/filings/0001104659-26-057835.md) | [(0.56)](/filings/0001104659-26-089884.md) | | Free cash flow | $m | not reported | [(1.4) d](/filings/0001104659-26-043870.md) | [(1.6)](/filings/0001104659-26-057835.md) | [(2.0) d](/filings/0001104659-26-089884.md) | [(2.9) d](/filings/0001104659-25-112717.md) | [(6.6) d](/filings/0001104659-26-043870.md) | [(14.1)](/filings/0001104659-26-057835.md) | [(28.4) d](/filings/0001104659-26-089884.md) | - Revenue. XBRL not reported. - Gross margin (gross profit / revenue). XBRL not reported. - Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss. Derived values: 12-month figure less the 9-month figure. - Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss. Derived values: 12-month figure less the 9-month figure. - Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted. - Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. Derived values: 9-month figure less the 6-month figure; 12-month figure less the 9-month figure; 6-month figure less the 3-month figure. ## Last five fiscal years | Line item | Unit | FY2022 (2022-12-31) | FY2023 (2023-12-31) | FY2024 (2024-12-31) | FY2025 (2025-12-31) | | --- | --- | ---: | ---: | ---: | ---: | | Revenue | $m | not reported | not reported | not reported | not reported | | Gross margin | % | not reported | not reported | not reported | not reported | | Operating margin | % | not reported | not reported | not reported | not reported | | Net margin | % | not reported | not reported | not reported | not reported | | Diluted EPS | $ per share | [(0.01)](/filings/0001213900-24-028655.md) | [(0.01)](/filings/0001013762-25-003765.md) | [(0.57)](/filings/0001104659-26-043870.md) | not reported | | Free cash flow | $m | not reported | not reported | [(2.8)](/filings/0001104659-26-043870.md) | [(13.1)](/filings/0001104659-26-043870.md) | - Revenue. XBRL not reported. - Gross margin (gross profit / revenue). XBRL not reported. - Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss. - Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss. - Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted. - Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. Each value links to the filing it came from. d marks a derived value. A ratio is not reported when any input is missing. ## Insider purchases and sales The last 20 open-market transactions on Form 4 (codes P and S). Reported price is as stated on the form, not a market price. [All insider transactions](/companies/fisn/insiders.md) None in coverage. ## Funds that report holding it From each manager’s latest Form 13F, largest reported value first. Reported value is as filed: filing data, not a price. [All funds](/funds.md) | Fund | Quarter ended | Reported value | Shares | Put or call | Change on the quarter before | | --- | --- | ---: | ---: | --- | --- | | [Blue Owl Capital Holdings LP](/funds/1858703.md) | 2026-06-30 | $14.7m | 1,333,333 | | New +1,333,333 | | [Elevation Wealth Management LLC](/funds/2093518.md) | 2026-06-30 | $3.3m | 298,335 | | New +298,335 | | [UBS Group AG](/funds/1610520.md) | 2026-06-30 | $2.2m | 198,497 | | New +198,497 | | [CONSOLIDATED PRESS INTERNATIONAL HOLDINGS LTD](/funds/1260786.md) | 2026-06-30 | $1.5m | 133,333 | | New +133,333 | | [CITADEL ADVISORS LLC](/funds/1423053.md) | 2026-06-30 | $1.2m | 110,000 | | New +110,000 | | [LPL Financial LLC](/funds/1403438.md) | 2026-06-30 | $782.3k | 70,858 | | New +70,858 | | [GEODE CAPITAL MANAGEMENT, LLC](/funds/1214717.md) | 2026-06-30 | $301.8k | 27,333 | | New +27,333 | | [Essential Investment Partners LLC](/funds/2145170.md) | 2026-06-30 | $291.5k | 26,400 | | Not compared | | [CHAPIN DAVIS, INC.](/funds/872098.md) | 2026-06-30 | $209.8k | 19,000 | | New +19,000 | | [GOLDMAN SACHS GROUP INC](/funds/886982.md) | 2026-06-30 | $191.8k | 17,373 | | New +17,373 | ## Recent filings [All 121 filings](/companies/fisn/filings.md) | Filed | Accepted | Form | What it is | Accession | | --- | --- | --- | --- | --- | | 2026-10-20 | 19:54 ET | [8-K](/filings/0001104659-26-117389.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-117389 | | 2026-09-21 | 15:26 ET | [8-K](/filings/0001104659-26-109201.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-109201 | | 2026-08-03 | 21:25 ET | [10-Q](/filings/0001104659-26-089884.md) | Quarterly report, period 2026-06-30 | 0001104659-26-089884 | | 2026-07-29 | 20:02 ET | [8-K](/filings/0001104659-26-088125.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-088125 | | 2026-07-17 | 20:06 ET | [8-K](/filings/0001104659-26-084625.md) | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001104659-26-084625 | | 2026-06-22 | 20:20 ET | [8-K](/filings/0001104659-26-076400.md) | 8.01 Other events | 0001104659-26-076400 | | 2026-06-17 | 20:46 ET | [DEF 14A](/filings/0001104659-26-075196.md) | Proxy statement, period 2026-07-17 | 0001104659-26-075196 | | 2026-06-10 | 19:07 ET | [S-1/A](/filings/0001104659-26-072286.md) | Registration statement, amended | 0001104659-26-072286 | | 2026-05-20 | 10:08 ET | [S-1](/filings/0001104659-26-064074.md) | Registration statement | 0001104659-26-064074 | | 2026-05-08 | 19:09 ET | [10-Q](/filings/0001104659-26-057835.md) | Quarterly report, period 2026-03-31 | 0001104659-26-057835 | ## Latest annual report [Form 10-K for the fiscal year ended Dec 31, 2025](/filings/0001104659-26-043870.md), filed Apr 15, 2026. ## Forecast league Not in this season’s league. [This season’s league](/leagues.md) ## About the filer - CIK: 1918102 - Tickers: FISN - Exchange: Nasdaq - SIC code: 4911 Electric Services - State of incorporation: DE - Filer category:
Emerging growth company Source: SEC EDGAR, XBRL company facts, the filing index and Forms 4. Last ingested by Listed: Oct 24, 2026, 15:50 ET. No prices; not investment advice.