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.
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsOpen market, last 90 days
- 0
- 13F holdersQ2 2026, +21 vs. previous quarter
- 21
- 13F valueReported value at the end of Q2 2026
- $25.2M
- Superinvestors holdingAt the end of Q2 2026
- 0
Price chart
Superinvestors holding FISN, Q2 2026
No superinvestor reported holding FISN at the end of Q2 2026.
Latest insider trades
Open-market purchases and sales by Deep Fission, Inc. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Aug 28, 2025 (view filing) | Aug 26 | 2 days | Tompkins Mark N.Director, 10% Owner | SSale | −25.0K | $0.00 | $0 | −0.5%4.72M after | |
| Aug 28, 2025 (view filing) | Aug 26 | 2 days | Jacobs Ian SethPresident, CEO, CFO, Secretary | PPurchase | +25.0K | $0.00 | $0 | +10.0%275.0K after |
Top 10 13F holders, Q2 2026
The largest institutional positions in Deep Fission, Inc. at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Blue Owl Capital Holdings LP | 1,333,333 | $14.7M | 2.24% | +1,333,333 | New |
| Elevation Wealth Management LLC | 298,335 | $3.29M | 2.47% | +298,335 | New |
| UBS Group AG | 198,497 | $2.19M | 0.00% | +198,497 | New |
| Consolidated Press International Holdings Ltd | 133,333 | $1.47M | 56.42% | +133,333 | New |
| Citadel Advisors LLC | 110,000 | $1.21M | 0.00% | +110,000 | New |
| LPL Financial LLC | 70,858 | $782.3K | 0.00% | +70,858 | New |
| Geode Capital Management, LLC | 27,333 | $301.8K | 0.00% | +27,333 | New |
| Essential Investment Partners LLC | 26,400 | $291.5K | 0.23% | +26,400 | New |
| Chapin Davis, Inc. | 19,000 | $209.8K | 0.04% | +19,000 | New |
| Goldman Sachs Group Inc | 17,373 | $191.8K | 0.00% | +17,373 | New |