Deep Fission, Inc.
FISNNasdaqCIK 1918102UtilitiesFiscal year ends Dec 31
Revenue is not reported in this company’s XBRL financial statements.
Latest quarter: Q2 FY2026
Three months to Jun 30, 2026, against the same quarter a year earlier.
- Revenuenot reported (Revenue not reported)No year-earlier figure to compare
- Gross marginnot reported (Gross profit and Revenue not reported)No year-earlier figure to compare
- Operating marginnot reported (Revenue not reported)No year-earlier figure to compare
- Net marginnot reported (Revenue not reported)No year-earlier figure to compare
- Diluted EPS−$0.56Diluted EPS, Q2 FY2026, three months to 2026-06-30−$0.56 per share. XBRL concept
us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-08-03, accession 0001104659-26-089884.Report this figure−107.4% on a year earlier - Free cash flow−$28.4mFree cash flow, Q2 FY2026, three months to 2026-06-30. operating cash flow − capital expenditureOperating cash flow: −$28.4m. XBRL concept
us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-08-03, accession 0001104659-26-089884. Derived: 6-month figure less the 3-month figure.Capital expenditure: $24.6k. XBRL conceptus-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-08-03, accession 0001104659-26-089884. Derived: 6-month figure less the 3-month figure.Report this figure−1309.3% on a year earlier
Last eight quarters
Full statements| Line item | Unit | Q3 FY20242024-09-30 | Q4 FY20242024-12-31 | Q1 FY20252025-03-31 | Q2 FY20252025-06-30 | Q3 FY20252025-09-30 | Q4 FY20252025-12-31 | Q1 FY20262026-03-31 | Q2 FY20262026-06-30 | Shape over the periods |
|---|---|---|---|---|---|---|---|---|---|---|
| Revenue | $m | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | |
| Gross margin | % | not reported (Gross profit and Revenue not reported) | not reported (Gross profit and Revenue not reported) | not reported (Gross profit and Revenue not reported) | not reported (Gross profit and Revenue not reported) | not reported (Gross profit and Revenue not reported) | not reported (Gross profit and Revenue not reported) | not reported (Gross profit and Revenue not reported) | not reported (Gross profit and Revenue not reported) | |
| Operating margin | % | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | |
| Net margin | % | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | |
| Diluted EPS | $ per share | (0.09)Diluted EPS, Q3 FY2024, three months to 2024-09-30−$0.09 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2026-04-15, accession 0001104659-26-043870.Report this figure | not reported (Diluted EPS not reported) | (0.19)Diluted EPS, Q1 FY2025, three months to 2025-03-31−$0.19 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-05-08, accession 0001104659-26-057835.Report this figure | (0.27)Diluted EPS, Q2 FY2025, three months to 2025-06-30−$0.27 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-08-03, accession 0001104659-26-089884.Report this figure | (1.94)Diluted EPS, Q3 FY2025, three months to 2025-09-30−$1.94 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2026-04-15, accession 0001104659-26-043870.Report this figure | not reported (Diluted EPS not reported) | (0.39)Diluted EPS, Q1 FY2026, three months to 2026-03-31−$0.39 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-05-08, accession 0001104659-26-057835.Report this figure | (0.56)Diluted EPS, Q2 FY2026, three months to 2026-06-30−$0.56 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-08-03, accession 0001104659-26-089884.Report this figure | |
| Free cash flow | $m | not reported (Capital expenditure not reported) | (1.4)Free cash flow, Q4 FY2024, three months to 2024-12-31. operating cash flow − capital expenditureOperating cash flow: −$1.4m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2026-04-15, accession 0001104659-26-043870. Derived: 12-month figure less the 9-month figure.Capital expenditure: $221. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-K filed 2026-04-15, accession 0001104659-26-043870. Derived: 12-month figure less the 9-month figure.Report this figure | (1.6)Free cash flow, Q1 FY2025, three months to 2025-03-31. operating cash flow − capital expenditureOperating cash flow: −$1.6m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-05-08, accession 0001104659-26-057835.Capital expenditure: $15.2k. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-05-08, accession 0001104659-26-057835.Report this figure | (2.0)Free cash flow, Q2 FY2025, three months to 2025-06-30. operating cash flow − capital expenditureOperating cash flow: −$2.0m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-08-03, accession 0001104659-26-089884. Derived: 6-month figure less the 3-month figure.Capital expenditure: $13.8k. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-08-03, accession 0001104659-26-089884. Derived: 6-month figure less the 3-month figure.Report this figure | (2.9)Free cash flow, Q3 FY2025, three months to 2025-09-30. operating cash flow − capital expenditureOperating cash flow: −$2.9m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2025-11-14, accession 0001104659-25-112717. Derived: 9-month figure less the 6-month figure.Capital expenditure: −$296. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2025-11-14, accession 0001104659-25-112717. Derived: 9-month figure less the 6-month figure.Report this figure | (6.6)Free cash flow, Q4 FY2025, three months to 2025-12-31. operating cash flow − capital expenditureOperating cash flow: −$6.6m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2026-04-15, accession 0001104659-26-043870. Derived: 12-month figure less the 9-month figure.Capital expenditure: $14.7k. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-K filed 2026-04-15, accession 0001104659-26-043870. Derived: 12-month figure less the 9-month figure.Report this figure | (14.1)Free cash flow, Q1 FY2026, three months to 2026-03-31. operating cash flow − capital expenditureOperating cash flow: −$14.0m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-05-08, accession 0001104659-26-057835.Capital expenditure: $53.4k. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-05-08, accession 0001104659-26-057835.Report this figure | (28.4)Free cash flow, Q2 FY2026, three months to 2026-06-30. operating cash flow − capital expenditureOperating cash flow: −$28.4m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-08-03, accession 0001104659-26-089884. Derived: 6-month figure less the 3-month figure.Capital expenditure: $24.6k. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-08-03, accession 0001104659-26-089884. Derived: 6-month figure less the 3-month figure.Report this figure |
Focus or hover a figure to see its XBRL concept, period and filing; each links to that filing. A figure marked d is derived: a quarter computed from year-to-date figures, such as the fourth quarter as the fiscal year less the nine months before it. A ratio reads not reported when any input is missing.
Last five fiscal years
| Line item | Unit | FY20222022-12-31 | FY20232023-12-31 | FY20242024-12-31 | FY20252025-12-31 | Shape over the periods |
|---|---|---|---|---|---|---|
| Revenue | $m | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | |
| Gross margin | % | not reported (Gross profit and Revenue not reported) | not reported (Gross profit and Revenue not reported) | not reported (Gross profit and Revenue not reported) | not reported (Gross profit and Revenue not reported) | |
| Operating margin | % | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | |
| Net margin | % | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | not reported (Revenue not reported) | |
| Diluted EPS | $ per share | (0.01)Diluted EPS, FY2022, twelve months to 2022-12-31−$0.01 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2024-04-01, accession 0001213900-24-028655.Report this figure | (0.01)Diluted EPS, FY2023, twelve months to 2023-12-31−$0.01 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2025-03-28, accession 0001013762-25-003765.Report this figure | (0.57)Diluted EPS, FY2024, twelve months to 2024-12-31−$0.57 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2026-04-15, accession 0001104659-26-043870.Report this figure | not reported (Diluted EPS not reported) | |
| Free cash flow | $m | not reported (Capital expenditure not reported) | not reported (Capital expenditure not reported) | (2.8)Free cash flow, FY2024, twelve months to 2024-12-31. operating cash flow − capital expenditureOperating cash flow: −$2.8m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2026-04-15, accession 0001104659-26-043870.Capital expenditure: $2.7k. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-K filed 2026-04-15, accession 0001104659-26-043870.Report this figure | (13.1)Free cash flow, FY2025, twelve months to 2025-12-31. operating cash flow − capital expenditureOperating cash flow: −$13.1m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2026-04-15, accession 0001104659-26-043870.Capital expenditure: $43.4k. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-K filed 2026-04-15, accession 0001104659-26-043870.Report this figure |
Focus or hover a figure to see its XBRL concept, period and filing; each links to that filing. A figure marked d is derived: a quarter computed from year-to-date figures, such as the fourth quarter as the fiscal year less the nine months before it. A ratio reads not reported when any input is missing.
Insider purchases and sales
All insider transactionsThe last 20 open-market transactions reported on Form 4 (codes P and S). The reported price is the price per share the insider stated on the form: filing data, not a market price.
No open-market purchases or sales by insiders are in coverage from Nov 2024 to Oct 2026.
No open-market purchases or sales by insiders are in coverage for this company.
Funds that report holding it
All fundsFrom each manager's latest Form 13F, largest reported value first. Reported value is as filed at the quarter end: filing data, not a price. A put or call is an option position, not shares held.
| Fund | Quarter ended | Reported value | Shares | Put or call | Change on the quarter before |
|---|---|---|---|---|---|
| Blue Owl Capital Holdings LP | 2026-06-30 | $14.7m | 1,333,333 | New+1,333,333 | |
| Elevation Wealth Management LLC | 2026-06-30 | $3.3m | 298,335 | New+298,335 | |
| UBS Group AG | 2026-06-30 | $2.2m | 198,497 | New+198,497 | |
| CONSOLIDATED PRESS INTERNATIONAL HOLDINGS LTD | 2026-06-30 | $1.5m | 133,333 | New+133,333 | |
| CITADEL ADVISORS LLC | 2026-06-30 | $1.2m | 110,000 | New+110,000 | |
| LPL Financial LLC | 2026-06-30 | $782.3k | 70,858 | New+70,858 | |
| GEODE CAPITAL MANAGEMENT, LLC | 2026-06-30 | $301.8k | 27,333 | New+27,333 | |
| Essential Investment Partners LLC | 2026-06-30 | $291.5k | 26,400 | Not compared | |
| CHAPIN DAVIS, INC. | 2026-06-30 | $209.8k | 19,000 | New+19,000 | |
| GOLDMAN SACHS GROUP INC | 2026-06-30 | $191.8k | 17,373 | New+17,373 |
Recent filings
All 121 filingsReports and events: 10-K, 10-Q, 8-K, proxy statements and ownership schedules.
| Filed | Form | What it is | Accession number |
|---|---|---|---|
| 2026-10-2019:54 ET | 8-K | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-117389 |
| 2026-09-2115:26 ET | 8-K | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-109201 |
| 2026-08-0321:25 ET | 10-Q | Quarterly reportPeriod 2026-06-30 | 0001104659-26-089884 |
| 2026-07-2920:02 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-088125 |
| 2026-07-1720:06 ET | 8-K | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001104659-26-084625 |
| 2026-06-2220:20 ET | 8-K | 8.01 Other events | 0001104659-26-076400 |
| 2026-06-1720:46 ET | DEF 14A | Proxy statementPeriod 2026-07-17 | 0001104659-26-075196 |
| 2026-06-1019:07 ET | S-1/A | Registration statement, amended | 0001104659-26-072286 |
| 2026-05-2010:08 ET | S-1 | Registration statement | 0001104659-26-064074 |
| 2026-05-0819:09 ET | 10-Q | Quarterly reportPeriod 2026-03-31 | 0001104659-26-057835 |
Latest annual report
Form 10-K for the fiscal year ended Dec 31, 2025Filed Apr 15, 2026. Its page lists the documents and the extracted sections, such as Business and Risk factors.
Forecast league
Not in this season’s league. The league lists companies whose quarter has ended and whose results are not yet filed.This season’s league
About the filer
- CIK
- 1918102
- Tickers
- FISN
- Exchange
- Nasdaq
- SIC code
- 4911 Electric Services
- Sector
- Utilities
- Fiscal year ends
- Dec 31
- Incorporated in
- DE
- Filer category
- <br>Emerging growth company
- Former names
- Surfside Acquisition Inc. (to 2025-09-08)
Source: SEC EDGAR, XBRL company facts, the filing index and Forms 4. Last ingested by Listed: Oct 24, 2026, 15:50 ET. Listed shows no prices and gives no investment advice.