ONEN · ONE Nuclear Energy Inc. · Shareholders & Ownership

$1.56 -0.13 (-7.69%) At close · Nov 6

Market Cap

$40.60M

26.02M

Volume · Nov 6 73.29K Avg daily vol (3M) 346.62K

Every disclosed holder of ONEN 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.

How the holder list picks a filing →

Who Owns ONEN

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	62	32,406,200	124.53%	Yes
Insiders (Forms 3, 4, 5)	0	0	0.00%	No
13D/G-only blocks	5	13,726,864	52.75%	Yes
Remaining	—	20,109,731	-77.28%	Negative
Registered funds (N-PORT, not summed)	1	349,900	1.34%	No

Shares outstanding: 26,023,333, the issuer's latest cover-page count restated onto today's split basis.

Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.

Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.

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 ONEN

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	Dowd Kevin Francis Insider CIK 2095401 · Sep 23, 2026 Director, Chief Operating Officer, 10% Owner, issuer-wide, not summed	30,237,852	116.20%	—	Sep 23, 2026	Director, Chief Operating Officer, 10% Owner, issuer-wide, not summed
2	Carilli Robert Insider CIK 2100066 · Sep 23, 2026 Director, Chief Strategy Officer, 10% Owner, issuer-wide, not summed	30,237,851	116.20%	—	Sep 23, 2026	Director, Chief Strategy Officer, 10% Owner, issuer-wide, not summed
3	Taylor Richard David Insider CIK 2100446 · Sep 23, 2026 Director, Chief Executive Officer, 10% Owner, issuer-wide, not summed	30,237,851	116.20%	—	Sep 23, 2026	Director, Chief Executive Officer, 10% Owner, issuer-wide, not summed
4	Hennessy Thomas D Insider CIK 1789408 · Sep 23, 2026 Director, President, 10% Owner, issuer-wide, not summed	6,494,999	24.96%	+5,994,999	Sep 23, 2026	Director, President, 10% Owner, issuer-wide, not summed
5	Hennessy Thomas D 13G CIK 1851746 · Unknown · Sep 30, 2026 Rule 13d-1(d), exempt investor	6,494,999	24.96%	+41,666	Sep 30, 2026	Rule 13d-1(d), exempt investor
5.1	HC VII Sponsor LLC Insider CIK 1851746 · Sep 23, 2026 10% Owner, issuer-wide, not summed	5,744,999	22.08%	+5,244,999	Sep 23, 2026	10% Owner, issuer-wide, not summed
6	HENNESSY DANIEL J Insider CIK 1519536 · Sep 23, 2026 Director, Chairman and CEO, 10% Owner, issuer-wide, not summed	5,744,999	22.08%	+5,244,999	Sep 23, 2026	Director, Chairman and CEO, 10% Owner, issuer-wide, not summed
7	NCCS Management, LLC 13D CIK 2157786 · Investment adviser · Sep 23, 2026 Item 4 purpose: Other	4,987,103	19.16%	—	Sep 23, 2026
8	New Circle Capital Solutions, LP Insider CIK 2140207 · Sep 23, 2026 10% Owner, issuer-wide, not summed	4,987,103	19.16%	—	Sep 23, 2026	10% Owner, issuer-wide, not summed
9	TENOR CAPITAL MANAGEMENT Co., L.P. 13F CIK 1346554 · Registered investment adviser · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	3,000,000	11.53%	0	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
10	Linden Advisors LP 13F CIK 1279396 · Registered investment adviser · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	2,907,464	11.17%	0	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
11	AQR Arbitrage LLC 13F CIK 1167456 · Registered investment adviser · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	2,300,891	8.84%	-31,591	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
12	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	1,790,500	6.88%	0	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
13	HIGHBRIDGE CAPITAL MANAGEMENT LLC 13F CIK 919185 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,690,479	6.50%	+28,644	Jun 30, 2026	carried, not yet filed for the newest quarter
14	HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 13F CIK 1535845 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	1,500,000	5.76%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
15	Magnetar Financial LLC 13F CIK 1352851 · Registered investment adviser · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	1,365,000	5.25%	0	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
16	North Rock Capital Management, LLC 13G CIK 1848800 · Investment adviser · Mar 31, 2026 Rule 13d-1(b), qualified institution	1,222,740	4.70%	—	Mar 31, 2026	Rule 13d-1(b), qualified institution
17	Verbena Value LP 13F CIK 2082932 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,222,740	4.70%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
18	BERKLEY W R CORP 13F CIK 11544 · Insurance company · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	1,196,423	4.60%	+219,214	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
18.1	BERKLEY W R CORP 13G CIK 11544 · Insurance company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	1,101,473	4.23%	—	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
19	Sculptor Capital LP 13F CIK 1054587 · Registered investment adviser · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	1,047,606	4.03%	0	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
20	GLAZER CAPITAL, LLC 13F CIK 1076809 · Registered investment adviser · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	1,029,743	3.96%	+300,084	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
20.1	GLAZER CAPITAL, LLC 13G CIK 1076809 · Registered investment adviser · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	999,993	3.84%	-27,512	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
21	Fort Baker Capital Management LP 13G CIK 1688382 · Registered investment adviser · Dec 31, 2025 Rule 13d-1(b), qualified institution	963,922	3.70%	—	Dec 31, 2025	Rule 13d-1(b), qualified institution
22	Crossingbridge Advisors, LLC 13F CIK 1770024 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	940,222	3.61%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
23	Harraden Circle Investments, LLC 13F CIK 1910592 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	825,362	3.17%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
24	LMR Partners LLP 13F CIK 1578621 · Exempt reporting adviser · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	800,000	3.07%	0	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
25	RIVERNORTH CAPITAL MANAGEMENT, LLC 13F CIK 1447578 · Registered investment adviser · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	798,143	3.07%	-368	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
26	Clear Street Group Inc. 13F CIK 1881567 · Unknown · Jun 30, 2026 Classes HVIIR, HVIIU, ONEN, carried, not yet filed for the newest quarter	670,814	2.58%	+148,480	Jun 30, 2026	Classes HVIIR, HVIIU, ONEN, carried, not yet filed for the newest quarter
27	Verition Fund Management LLC 13F CIK 1454027 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	600,985	2.31%	-7,905	Jun 30, 2026	carried, not yet filed for the newest quarter
28	MOORE CAPITAL MANAGEMENT, LP 13F CIK 1448574 · Registered investment adviser · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	600,000	2.31%	0	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
29	Radcliffe Capital Management, L.P. 13F CIK 1218275 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	525,544	2.02%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
30	Polar Asset Management Partners Inc. 13F CIK 1326389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	500,000	1.92%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
31	METEORA CAPITAL, LLC 13F CIK 1905106 · Investment adviser · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	489,800	1.88%	0	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
32	Shaolin Capital Management LLC 13F CIK 1766806 · Registered investment adviser · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	489,244	1.88%	-60,756	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
33	TORONTO DOMINION BANK 13F CIK 947263 · Bank · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	477,087	1.83%	-82,344	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
34	RiverPark Advisors, LLC 13F CIK 1484256 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	475,322	1.83%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
35	BNP PARIBAS ARBITRAGE, SA 13F CIK 1166588 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	444,056	1.71%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
36	MIZUHO SECURITIES USA LLC 13F CIK 812291 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	421,750	1.62%	+158,155	Jun 30, 2026	carried, not yet filed for the newest quarter
37	WHITEBOX ADVISORS LLC 13F CIK 1257391 · Registered investment adviser · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	400,000	1.54%	0	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
38	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	369,995	1.42%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
39	PICTON MAHONEY ASSET MANAGEMENT 13F CIK 1539041 · Non-US institution · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	350,000	1.34%	0	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
40	CrossingBridge Ultra-Short Duration Fund Fund S000071657 · Registered fund · Sep 30, 2026 Trust for Professional Managers, not summed	349,900	1.34%	—	Sep 30, 2026	Trust for Professional Managers, not summed
41	DLD Asset Management, LP 13F CIK 1578299 · Registered investment adviser · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	303,151	1.16%	0	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
42	Qube Research & Technologies Ltd 13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	293,951	1.13%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
43	K2 PRINCIPAL FUND, L.P. 13F CIK 1461790 · Unknown · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	257,949	0.99%	-98,150	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
44	Geeza Nicholas Boris Insider CIK 1974770 · Sep 23, 2026 EVP, CFO and Secretary, issuer-wide, not summed	250,000	0.96%	—	Sep 23, 2026	EVP, CFO and Secretary, issuer-wide, not summed
45	Centiva Capital, LP 13F CIK 1692507 · Registered investment adviser · Jun 30, 2026 Classes HVIIR, ONEN, carried, not yet filed for the newest quarter	215,900	0.83%	+215,900	Jun 30, 2026	Classes HVIIR, ONEN, carried, not yet filed for the newest quarter
46	SkyView Investment Advisors, LLC 13F CIK 1848237 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	201,320	0.77%	+201,320	Jun 30, 2026	carried, not yet filed for the newest quarter
47	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	200,000	0.77%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
48	Brevan Howard Capital Management LP 13F CIK 1512857 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	200,000	0.77%	+120,000	Jun 30, 2026	carried, not yet filed for the newest quarter
49	Saba Capital Management, L.P. 13F CIK 1510281 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	175,000	0.67%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
50	HRT FINANCIAL LP 13F CIK 1475597 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	167,145	0.64%	0	Jun 30, 2026	carried, not yet filed for the newest quarter

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.

Showing 1–50 of 80 holders

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Key facts CIK 1846416 CUSIP 68253E100 13F (30d) 3 filings 3 filers Visit website