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Deep Fission, Inc.

FISN
Exchange
Nasdaq
Industry
Electric Services
SEC CIK
0001918102

No open-market purchases or sales by Deep Fission, Inc. insiders were filed in the last 90 days; 21 institutions reported holding it in 13F filings for Q2 2026, worth $25.2M in total; no superinvestor holds it.

13F holders, Q2 2026

Institutional positions in Deep Fission, Inc. as of Jun 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
21
+21 vs. Q1 2026
Shares held
2.29M
+2.29M vs. Q1 2026
Total value
$25.2M
+$25.2M vs. Q1 2026
New holders
21
0 more added
Sold out
0
0 more reduced

Compare with Q1 2026: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting FISN on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ2 2026: 21 institutions
Q1 2021: 0 institutionsQ2 2021: 0 institutionsQ3 2021: 0 institutionsQ4 2021: 0 institutionsQ1 2022: 0 institutionsQ2 2022: 0 institutionsQ3 2022: 0 institutionsQ4 2022: 0 institutionsQ1 2023: 0 institutionsQ2 2023: 0 institutionsQ3 2023: 0 institutionsQ4 2023: 0 institutionsQ1 2024: 0 institutionsQ2 2024: 0 institutionsQ3 2024: 0 institutionsQ4 2024: 0 institutionsQ1 2025: 0 institutionsQ2 2025: 0 institutionsQ3 2025: 0 institutionsQ4 2025: 0 institutionsQ1 2026: 0 institutionsQ2 2026: 21 institutions
Value heldQ2 2026: $25.2M
Q1 2021: $0Q2 2021: $0Q3 2021: $0Q4 2021: $0Q1 2022: $0Q2 2022: $0Q3 2022: $0Q4 2022: $0Q1 2023: $0Q2 2023: $0Q3 2023: $0Q4 2023: $0Q1 2024: $0Q2 2024: $0Q3 2024: $0Q4 2024: $0Q1 2025: $0Q2 2025: $0Q3 2025: $0Q4 2025: $0Q1 2026: $0Q2 2026: $25.2M
Institutions holding FISN and their total value by quarter
QuarterHoldersValue
Q2 202621$25.2M
Q1 20260$0
Q4 20250$0
Q3 20250$0
Q2 20250$0
Q1 20250$0
Q4 20240$0
Q3 20240$0
Q2 20240$0
Q1 20240$0
Q4 20230$0
Q3 20230$0
Q2 20230$0
Q1 20230$0
Q4 20220$0
Q3 20220$0
Q2 20220$0
Q1 20220$0
Q4 20210$0
Q3 20210$0
Q2 20210$0
Q1 20210$0

Institutions, Q2 2026

Shares, value and share of portfolio for each institution holding Deep Fission, Inc.; share changes are against Q1 2026.

Institutions holding FISN in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
Blue Owl Capital Holdings LP1,333,333$14.7M2.24%+1,333,333New
Elevation Wealth Management LLC298,335$3.29M2.47%+298,335New
UBS Group AG198,497$2.19M0.00%+198,497New
Consolidated Press International Holdings Ltd133,333$1.47M56.42%+133,333New
Citadel Advisors LLC110,000$1.21M0.00%+110,000New
LPL Financial LLC70,858$782.3K0.00%+70,858New
Geode Capital Management, LLC27,333$301.8K0.00%+27,333New
Essential Investment Partners LLC26,400$291.5K0.23%+26,400New
Chapin Davis, Inc.19,000$209.8K0.04%+19,000New
Goldman Sachs Group Inc17,373$191.8K0.00%+17,373New
BHK Investment Advisors, LLC15,000$165.6K0.05%+15,000New
Prelude Capital Management, LLC14,714$162.4K0.01%+14,714New
Traphagen Investment Advisors LLC13,666$150.9K0.01%+13,666New
Morgan Stanley6,050$66.8K0.00%+6,050New
US Bancorp1,100$12.1K0.00%+1,100New
Clearstead Advisors, LLC500$5.52K0.00%+500New
FNY Investment Advisers, LLC500$5.00K0.00%+500New
Wells Fargo & Company335$3.70K0.00%+335New
Jones Financial Companies LLLP300$3.23K0.00%+300New
National Bank of Canada200$2.16K0.00%+200New
Citigroup Inc2$220.00%+2New