DEEP FISSION INC
FISN·243927100·US·Common Stock-Activist
FISN (DEEP FISSION INC) is held by 11 institutional investors as of Q2 2026. Largest holders: UBS Group AG ($2.2M), CITADEL ADVISORS LLC ($1.2M), LPL Financial LLC ($782,272). Net institutional sentiment: Bullish.
11
Holders
(2 Elite)
$4.8M
Total Value
100% (11)
Consensus
11 buying - 0 selling
13F: Insider & Congress: Updated regularly
Who's Trading
Source dates: Price Oct 9, 2026 · Insiders none · Activists May 15, 2026 · Congress none
ActivistMNMark N.Tompkins5.6%May 15, 2026
ActivistEEEE HOLDINGS LIMITED5.5%Nov 3, 2025
ActivistMRMuller Richard10.6%Sep 23, 2025
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Top Holders
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| Action | ||||||
|---|---|---|---|---|---|---|
New | 198,497 | $2.2M | 0.0% | -59.69% | 36 | |
New | 110,000 | $1.2M | 0.0% | -59.69% | 35 | |
New | 70,858 | $782,272 | 0.0% | -59.69% | 34 | |
New | 27,333 | $301,756 | 0.0% | -59.69% | 36 | |
New | 17,373 | $191,798 | 0.0% | -59.69% | 35 | |
New | 6,050 | $66,792 | 0.0% | -59.69% | 32 | |
New | 1,100 | $12,144 | 0.0% | -59.69% | 27 | |
New | 335 | $3,698 | 0.0% | -59.69% | 21 | |
New | 300 | $3,225 | 0.0% | -59.69% | 21 | |
New | 200 | $2,160 | 0.0% | -59.69% | 18 | |
New | 2 | $22 | 0.0% | -59.69% | 17 |
FISNDEEP FISSION INCContinue exploring
Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer