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NANO Nuclear Energy NNE

US equityMarket cap rank #3347Specialty Industrial MachineryNuclear Power
$16.01 −$0.48 (-2.91%)
Pre-market · Oct 8, 8:20 am ET · After hours $16.19 +1.10%
Open$15.98
Prev close$16.49
Day range$15.38 – $16.02
Volume1.79M
Market cap$859.71M
P/E (TTM)–
Dividend yield–

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership57.5%-2.18 pts vs. prior quarter
Institutions holding280-1 vs. prior quarter
Insider trades (recent)17 buys / 31 sellsNet selling
Short interest28.79% of floatDays to cover 9.8 · as of 15 Sep 2026
Short-sale volume share20.5%5-day average of daily volume

Short-sale volume as % of daily volume

14%20%25%31%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$5.15M (5 inflow days, 15 outflow days).

Net flow by order size, last 20 sessions

+$794.7KSuper−$5.9MBig−$5.6MMid−$5.1MSmall

Super/Big orders approximate institutional-size trades; Mid/Small approximate retail-size trades. Net buy minus sell value in each bucket, summed over the window.

The five largest holders on file together own 37.4% of shares outstanding.

Largest holders

  • I Financial Ventures Group Llc14.43%
  • Van Eck Associates Corporation7.11%
  • BlackRock6.50%
  • Mirae Asset Global Investments Co., Ltd5.69%
  • Vanguard Capital Management, LLC3.68%
  • Geode Capital Management, LLC2.05%
  • State Street Global Advisors1.93%
  • UBS Asset Management1.50%

By investor type

  • Mutual Fund37.69%
  • VC/PE Fund14.45%
  • Public Company2.33%
  • Individual/Insider2.07%
  • Hedge Fund1.35%
  • Private Company1.23%
  • Government Pension Fund0.19%
  • Insurance Company0.16%

Reported short interest has risen from 22.82% to 28.79% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Recent institutional activity

HolderTypePeriodShare changeNew stake
Nuveen Asset Management LLC Insurance Company 2026/Q3 +83,955 0.2%
Van Eck Associates Corporation Mutual Fund 2026/Q3 +810,022 7.1%
BlackRock Mutual Fund 2026/Q3 +572,797 6.5%
Geode Capital Management, LLC Mutual Fund 2026/Q3 +169,502 2.1%
BNP Paribas Financial Markets SNC Private Company 2026/Q3 +166,120 0.5%
State Street Global Advisors Mutual Fund 2026/Q3 +157,924 1.9%
Tidal Investments LLC Mutual Fund 2026/Q3 +102,458 0.3%
Aquatic Capital Management LLC Hedge Fund 2026/Q3 +100,516 0.2%
Defiance ETFs, LLC Mutual Fund 2026/Q3 +95,305 0.3%
Voleon Capital Management LP Hedge Fund 2026/Q3 +93,023 0.2%
UBS Asset Management Mutual Fund 2026/Q3 +75,317 1.5%
Pacer Advisors, Inc. Mutual Fund 2026/Q3 +70,470 0.3%
Rockefeller & Co. LLC Mutual Fund 2026/Q3 +70,455 0.1%
Vanguard Capital Management, LLC Mutual Fund 2026/Q3 +61,844 3.7%
Vanguard Portfolio Management, LLC Mutual Fund 2026/Q3 +59,069 0.6%

Institutional buy/sell activity by reporting period, largest moves first.

Insider transactions

DateInsiderTitleTransactionSharesPriceHeld after
30 Sep 2026 Jaisun Garcha Chief Financial Officer Other Derivative Acquisition +168,786 – –
30 Sep 2026 James Walker Chief Executive Officer Other Derivative Acquisition +257,790 – –
30 Sep 2026 Jiang Yu Founder, Executive Chairman, President, Secretary & Treasurer Other Derivative Acquisition +461,223 – –
30 Sep 2026 Diane Hare Independent Director Other Derivative Acquisition +9,536 – –
30 Sep 2026 Kenny Yu Independent Director Other Derivative Acquisition +9,536 – –
30 Sep 2026 Seth Berl Independent Director Other Derivative Acquisition +9,536 – –
30 Sep 2026 Tsun Law Independent Director Other Derivative Acquisition +9,536 – –
2 Sep 2026 James Walker Chief Executive Officer Intent to Sell (Form 144) -25,000 $17.77 –
1 Sep 2026 I Financial Ventures Group Llc Automatic Disposition -474,500 $17.48 7,749,500
31 Aug 2026 James Walker Chief Executive Officer Intent to Sell (Form 144) -25,000 $17.41 –
31 Aug 2026 I Financial Ventures Group Llc Intent to Sell (Form 144) -474,500 $18.29 –
4 Jun 2026 Florent Heidet Chief Technology Officer & Head of Reactor Development Intent to Sell (Form 144) -3,000 $24.95 –
4 Jun 2026 Seth Berl Independent Director Intent to Sell (Form 144) -3,750 $24.92 –
4 Jun 2026 Florent Heidet Chief Technology Officer & Head of Reactor Development Derivative Exercise and Sale -3,000 $24.95 6,185
4 Jun 2026 Seth Berl Independent Director Derivative Exercise and Sale -3,750 $24.92 7,586
2 Jun 2026 Jaisun Garcha Chief Financial Officer Derivative Exercise and Sale -37,215 $29.91 345,000
2 Jun 2026 James Walker Chief Executive Officer Automatic Disposition -95,000 $27.90 685,000
2 Jun 2026 James Walker Chief Executive Officer Derivative Exercise and Sale -28,688 $29.91 685,000
2 Jun 2026 James Walker Chief Executive Officer Derivative Exercise and Retained +200,000 $3.00 685,000
2 Jun 2026 Jiang Yu Founder, Executive Chairman, President, Secretary & Treasurer Intent to Sell (Form 144) -45,900 $30.57 –

From Form 4/Form 144 filings. Negative share counts are disposals (sales, gifts, or shares withheld for taxes); positive are acquisitions.

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 15,458,223 28.8% 9.8
31 Aug 2026 14,950,361 27.8% 9.7
14 Aug 2026 14,621,498 27.2% 7.1
31 Jul 2026 15,256,658 28.4% 7.1
15 Jul 2026 13,837,618 26.5% 6.4
30 Jun 2026 11,894,099 22.8% 3.6

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