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One Nuclear Energy Inc (ONEN)

CUSIP: 68253E100 | NYSE | 4 institutional holders

Quarters

Q3 2026
CompareDetailedHistoricalFundsOptionsShort Interest13D/13GPeersTargetingTrading SummaryProfile

Beneficial Ownership — 13D / 13G

Full history →

5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.

HolderShares% of ClassChangeEvent Datevs 13F
13G/AHennessy Thomas D
with HC VII Sponsor LLC, Hennessy Capital Group LLC, Hennessy Daniel J
6,494,9996.0%New 5%+ stakeSep 30, 2026No 13F filer matched
13DNccs Management, LLC4,987,1034.6%

Institutional Holders — Q3 2026

Geode Capital Management, LLC22,239
0.0% of portfolio›$47.8K
Context Capital Management, LLC15,624
0.0% of portfolio›$33.6K
UBS Group AG160
0.0% of portfolio›$344
Caitong International Asset Management Co., Ltd15
0.0% of portfolio›$39
StyleTurnoverLocationFiled
Geode Capital Management, LLC
22,239$47.8K0.0%IndexVery LowBoston, MA2026-11-06
Context Capital Management, LLC
15,624$33.6K0.0%GrowthHighGreenwich, CT2026-11-04
UBS Group AG
160$3440.0%CoreMediumZurich, Switzerland2026-11-10
Caitong International Asset Management Co., Ltd
15$390.0%GrowthVery HighHong Kong, South Korea2026-10-29
Newly reported
Sep 23, 2026
No 13F filer matched
13G/AHennessy Thomas D6,494,999
6.0% of class · Sep 30, 2026New 5%+ stake
with HC VII Sponsor LLC, Hennessy Capital Group LLC, Hennessy Daniel J
No 13F filer matched
13DNccs Management, LLC4,987,103
4.6% of class · Sep 23, 2026Newly reported
No 13F filer matched