One Nuclear EnergyONEN
13F holders, Q4 2025 (December 31)At the end of Q4 2025, 55 institutions reported holding One Nuclear Energy Inc. (ONEN) in their 13F filings, up 13 from Q3 2025. 20 opened new positions and 9 sold out. The largest holders were TENOR CAPITAL MANAGEMENT Co., L.P. ($15.5M), Highbridge Capital Management LLC ($15.5M) and Linden Advisors LP ($15.1M). 3 famous investors held it, including David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- One Nuclear Energy Inc.
- Filed as
- HENNESSY CAP INVT CORP VII (Q4 2025)
- CUSIP
- G4405D107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 20 | $49.2M |
| Exits | 9 | $36.3M |
All 13F filers, Q3 2025 → Q4 2025: 5,152,116 shares bought and 6,197,305 shares sold, net −1,045,189 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 55 holders
| TENOR CAPITAL MANAGEMENT Co., L.P. | 1.31% | No change | 1,500,000 | $15.5M |
| Highbridge Capital Management LLC | 1.23% | New | 1,500,000 | $15.5M |
| Linden Advisors LP | 1.15% | Add +20.6% | 1,463,732 | $15.1M |
| Aventail Capital Group, LP | 0.83% | New | 1,392,607 | $14.4M |
| Verbena Value LP | 2.18% | — | 1,222,740 | $12.7M |
| AQR Arbitrage LLC | 0.30% | Reduce -17.6% | 1,059,589 | $11.0M |
| Fort Baker Capital Management LP | 1.37% | Reduce -4.5% | 963,922 | $10.0M |
| D. E. Shaw & Co. | 0.01% | No change | 940,500 | $9.7M |
| Magnetar Financial LLC | 0.07% | Reduce -5.0% | 665,000 | $6.9M |
| Two Sigma Investments, LP | 0.01% | No change | 634,375 | $6.6M |
| Glazer Capital, LLC | 0.17% | Reduce -54.0% | 540,100 | $5.6M |
| Radcliffe Capital Management, L.P. | 0.77% | Reduce -7.3% | 526,647 | $5.5M |
| Berkley W R Corp. | 0.28% | Reduce -26.0% | 478,169 | $4.9M |
| Rivernorth Capital Management, LLC | 0.20% | Add +37.6% | 399,024 | $4.1M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -16.7% | 369,995 | $3.8M |
| Sculptor Capital LP | 0.08% | New | 353,000 | $3.7M |
| LMR Partners LLP | 0.05% | Reduce -22.2% | 350,000 | $3.6M |
| Millennium Management | 0.00% | New | 337,434 | $3.5M |
| Moore Capital Management, LP | 0.07% | No change | 300,000 | $3.1M |
| Qube Research & Technologies Ltd | 0.00% | New | 293,951 | $3.0M |
| Wealthspring Capital LLC | 0.59% | Reduce -51.2% | 236,500 | $2.4M |
| Periscope Capital Inc. | 0.42% | Reduce -60.6% | 200,000 | $2.1M |
| Whitebox Advisors LLC | 0.13% | No change | 200,000 | $2.1M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.00% | No change | 200,000 | $2.1M |
| Bank of America Corp. | 0.00% | New | 200,000 | $2.1M |
| Gritstone Asset Management LLC | 2.01% | No change | 197,899 | $2.0M |
| HRT Financial LP | 0.01% | New | 167,345 | $1.7M |
| Picton Mahoney Asset Management | 0.02% | Reduce -40.0% | 150,000 | $1.6M |
| Monimus Capital Management, LP | 1.02% | New | 149,711 | $1.5M |
| DLD Asset Management, LP | 0.52% | Add +31.3% | 146,667 | $1.5M |
| Aristeia Capital, L.L.C. | 0.07% | No change | 125,000 | $1.3M |
| Shaolin Capital Management LLC | 0.14% | No change | 100,000 | $1.0M |
| Cantor Fitzgerald, L. P. | 0.03% | New | 89,590 | $927K |
| Citadel Advisors | 0.00% | New | 78,670 | $814K |
| Verition Fund Management LLC | 0.00% | Reduce -40.1% | 61,617 | $638K |
| Heights Capital Management, Inc. | 0.24% | No change | 60,000 | $621K |
| Context Capital Management, LLC | 0.21% | Reduce -40.0% | 60,000 | $621K |
| K2 Principal Fund, L.P. | 0.21% | Reduce -84.8% | 53,442 | $553K |
| CSS LLC | 0.09% | New | 51,900 | $537K |
| Cannon Global Investment Management, LLC | 1.40% | New | 50,800 | $526K |
| Mirae Asset Global Investments Co., Ltd. | 0.00% | No change | 50,000 | $518K |
| Virtu Financial LLC | 0.01% | New | 31,118 | $322K |
| Geode Capital Management, LLC | 0.00% | No change | 29,309 | $303K |
| Clear Street Group Inc. | 0.00% | Reduce -36.0% | 29,074 | $301K |
| Davidson Kempner Capital Management LP | 0.01% | New | 24,600 | $255K |
| Toronto Dominion Bank | 0.00% | Reduce -92.1% | 19,683 | $204K |
| Wolverine Asset Management LLC | 0.01% | Reduce -72.8% | 14,677 | $152K |
| Shay Capital LLC | 0.02% | New | 14,135 | $146K |
| Lineage Point Capital LP | 0.04% | — | 10,000 | $104K |
| Barclays PLC | 0.00% | New | 10,000 | $104K |
| JPMorgan Chase & Co. | 0.00% | New | 9,895 | $102K |
| UBS Group AG | 0.00% | New | 1,762 | $18K |
| FNY Investment Advisers, LLC | 0.00% | New | 1,110 | $11K |
| National Bank of Canada | 0.00% | New | 447 | $5K |
| Morgan Stanley | 0.00% | Add +5200.0% | 53 | $549 |
"% of holder's portfolio" is ONEN's weight in each manager's 13F, not the share of One Nuclear Energy Inc. the manager owns.