FISN · Deep Fission, Inc. · Shareholders & Ownership
Substantial doubt about the company's ability to continue as a going concern.
“Based on our expectation of continued operating losses for at least the near term and our current operating plan, we anticipate our existing cash and cash equivalents, together with net proceeds from the 2026 Private Placement and IPO, will not be sufficient to fund our operations for the next twelve months, absent additional financing or material changes to our operating plan. Accordingly, we determined that there is substantial doubt about our ability to continue as a going concern for the twelve-month period following the issuance of these financial statements.”View the 10-Q filed Aug 3, 2026
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Every disclosed holder of FISN in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns FISN
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 2,883,046 | 4.89% |
| Insiders (Forms 3, 4, 5) | 8,561,592 | 14.53% |
| 13D/G-only blocks | 2,866,667 | 4.87% |
| Remaining | 44,598,283 | 75.71% |
| Registered funds (N-PORT, not summed) | 24,401 | 0.04% |
Shares outstanding: 58,909,588, the issuer's latest cover-page count restated onto today's split basis.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of FISN
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
|
5,426,406 | ||
| 1.1 |
|
5,196,426 | ||
| 2 |
Mark N. Tompkins
13G
CIK 1455971 · Unknown · Mar 31, 2026
Rule 13d-1(c), passive investor, not summed
|
3,158,333 | ||
| 2.1 |
|
1,891,667 | ||
| 3 |
|
2,866,667 | ||
| 4 |
Blue Owl Capital Holdings LP
13F
CIK 1858703 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,333,333 | ||
| 5 |
|
549,451 | ||
| 5.1 |
|
10,541,757 | ||
| 6 |
EXCHANGE TRADED CONCEPTS, LLC
13F
CIK 1457320 · Registered investment adviser · Sep 30, 2026
|
480,348 | ||
| 7 |
Elevation Wealth Management LLC
13F
CIK 2093518 · Registered investment adviser · Sep 30, 2026
|
349,336 | ||
| 8 |
|
324,517 | ||
| 9 |
|
275,000 | ||
| 10 |
|
198,497 | ||
| 11 |
|
133,996 | ||
| 12 |
CONSOLIDATED PRESS INTERNATIONAL HOLDINGS LTD
13F
CIK 1260786 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
133,333 | ||
| 13 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
110,000 | ||
| 14 |
|
103,928 | ||
| 15 |
|
86,607 | ||
| 16 |
LPL Financial LLC
13F
CIK 1403438 · Broker-dealer · Sep 30, 2026
|
80,112 | ||
| 17 |
Essential Investment Partners LLC
13F
CIK 2145170 · Registered investment adviser · Sep 30, 2026
|
59,502 | ||
| 18 |
Harbour Capital Advisors, LLC
13F
CIK 1682501 · Registered investment adviser · Sep 30, 2026
|
25,050 | ||
| 19 |
CHAPIN DAVIS, INC.
13F
CIK 872098 · Unknown · Sep 30, 2026
|
19,000 | ||
| 20 |
Fidelity Nasdaq Composite Index Fund
Fund
S000055366 · Registered fund · Aug 31, 2026
Fidelity Concord Street Trust, not summed
|
18,341 | ||
| 21 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Sep 30, 2026
|
18,341 | ||
| 22 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
17,373 | ||
| 23 |
TRAPHAGEN INVESTMENT ADVISORS LLC
13F
CIK 2023380 · Registered investment adviser · Sep 30, 2026
|
16,815 | ||
| 24 |
BHK Investment Advisors, LLC
13F
CIK 1710539 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
15,000 | ||
| 25 |
PRELUDE CAPITAL MANAGEMENT, LLC
13F
CIK 1387508 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
14,714 | ||
| 26 |
ALPS Nautilus SMR Nuclear & Technology ETF
Fund
S000101442 · Registered fund · Aug 31, 2026
ALPS ETF TRUST, not summed
|
6,060 | ||
| 27 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
6,050 | ||
| 28 |
US BANCORP \DE\
13F
CIK 36104 · Bank · Sep 30, 2026
|
2,600 | ||
| 29 |
FNY Investment Advisers, LLC
13F
CIK 1742998 · Unknown · Sep 30, 2026
|
1,201 | ||
| 30 |
Parkside Financial Bank & Trust
13F
CIK 1455267 · Unknown · Sep 30, 2026
|
700 | ||
| 31 |
Clearstead Advisors, LLC
13F
CIK 842775 · Registered investment adviser · Sep 30, 2026
|
500 | ||
| 32 |
WELLS FARGO & COMPANY/MN
13F
CIK 72971 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
335 | ||
| 33 |
JONES FINANCIAL COMPANIES LLLP
13F
CIK 815917 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
300 | ||
| 34 |
CITIGROUP INC
13F
CIK 831001 · Bank · Sep 30, 2026
|
266 | ||
| 35 |
NATIONAL BANK OF CANADA /FI/
13F
CIK 926171 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
200 | ||
| 36 |
KELLEHER FINANCIAL ADVISORS
13F
CIK 1507971 · Registered investment adviser · Sep 30, 2026
|
140 |
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.