Nano Nuclear Energy Inc
Nano Nuclear Energy Inc (NNE) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · NNE · as of Sep 30, 2025
Ownership Breakdown
232
Institutional Holders
▲ 37 vs Q2
$630.02M
Total Inst. Value
▲ $212.25M vs Q2
41.58M
Shares Outstanding
freeFloat 95.20%
16.34M
13F Shares Held
▲ 4.22M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
NNE largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VAN ECK ASSOCIATES CORP electric services | 2.60M | 6.66% | 6.66% | $100.19B | Nov 13, 2025 | ▲ 1.03M |
BLACKROCK, INC. electric services | 2.25M | 5.77% | 5.77% | $86.67B | Nov 12, 2025 | ▲ 717.2K |
VANGUARD GROUP INC electric services | 1.78M | 4.56% | 4.56% | $68.55B | Nov 7, 2025 | ▲ 516.1K |
MIRAE ASSET GLOBAL ETFS HOLDINGS LTD. electric services | 1.73M | 4.43% | 4.43% | $66.56B | Nov 14, 2025 | ▲ 1.71M |
JANE STREET GROUP, LLC electric services | 1.31M | 3.37% | 3.37% | $50.67B | Nov 14, 2025 | ▲ 673.4K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP electric services | 1.25M | 3.20% | 3.20% | $48.12B | Nov 14, 2025 | ▼ 217.4K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP electric services | 1.08M | 2.78% | 2.78% | $41.81B | Nov 14, 2025 | ▲ 463.6K |
HEIGHTS CAPITAL MANAGEMENT, INC electric services | 929.6K | 2.38% | 2.38% | $35.85B | Nov 18, 2025 | ▼ 290.8K |
CITADEL ADVISORS LLC electric services | 852.1K | 2.19% | 2.19% | $32.86B | Nov 14, 2025 | ▲ 379.8K |
GEODE CAPITAL MANAGEMENT, LLC electric services | 726.3K | 1.86% | 1.86% | $28.01B | Nov 12, 2025 | ▲ 377.2K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
42
Increased
+8.64M shares1
New Positions
first time holders7
Decreased
−1.03M shares0
Sold Out
fully exitedNet shares change (top 50)
+7.61M
+8.64M / −1.03M
Net new holders
+36
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
NNE insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
12
Buy transactions
53
Sell transactions
0.23
Buy/Sell ratio
$2M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Hare Diane Elizabeth director | Jun 3, 2026 | Sale | 2,228 | $26.31 | $58.6K | 1.2K | Form 4 ↗ |
Hare Diane Elizabeth director | Jun 3, 2026 | Sale | 1,000 | $27.04 | $27.0K | 200 | Form 4 ↗ |
Hare Diane Elizabeth director | Jun 3, 2026 | Sale | 100 | $27.84 | $2.8K | 100 | Form 4 ↗ |
Hare Diane Elizabeth director | Jun 3, 2026 | Sale | 100 | $28.87 | $2.9K | 0 | Form 4 ↗ |
Walker James John Chief Executive Officer | Jun 3, 2026 | Sale | 46,145 | $26.18 | $1.21M | 603.9K | Form 4 ↗ |
Walker James John Chief Executive Officer | Jun 3, 2026 | Sale | 25,792 | $26.77 | $690.4K | 582.9K | Form 4 ↗ |
Walker James John Chief Executive Officer | Jun 3, 2026 | Sale | 22,380 | $27.06 | $605.7K | 581.5K | Form 4 ↗ |
Walker James John Chief Executive Officer | Jun 3, 2026 | Sale | 2,624 | $27.55 | $72.3K | 580.3K | Form 4 ↗ |
Walker James John Chief Executive Officer | Jun 3, 2026 | Sale | 201 | $28.69 | $5.8K | 580.1K | Form 4 ↗ |
Walker James John Chief Executive Officer | Jun 3, 2026 | Sale | 1,475 | $27.90 | $41.2K | 580.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Nano Nuclear Energy Inc (NNE) is primarily owned by institutional investors, who hold approximately 39.3% of total shares outstanding. Company insiders own approximately 4.80%, while retail and public investors account for the remaining 55.91%.
The largest institutional shareholder of Nano Nuclear Energy Inc is VAN ECK ASSOCIATES CORP, holding approximately 2.60 million shares — equal to 6.66% of outstanding shares — as of September 30, 2025.
A total of 232 institutional investors currently hold NNE stock, with a combined institutional value of approximately $630,019,754 as of the most recent 13F filing period.
Frequently asked questions
NNE ownershipNano Nuclear Energy Inc (NNE) is primarily owned by institutional investors, who hold approximately 39.3% of shares. The largest shareholder is VAN ECK ASSOCIATES CORP with a 6.66% stake. Company insiders hold 4.80%. Data sourced from SEC Form 13F as of September 30, 2025.