Reporting owner · CIK 0002021757
Walker James John
SEC Form 4 history across 1 companies, 4 transactions and 3 filings.
CEOChief Executive OfficerNano Nuclear Energy Inc.
Open-market transaction mix0% buys0 buys · 1 sales
Available history · Jun 03, 2026 – Oct 01, 2026
Latest insider transactions
Form 4 filings from available history.| Company | Insider | Activity | Disclosed value | Filed (ET) |
|---|---|---|---|---|
NNENano Nuclear Energy Inc. | Walker James JohnCEO | A · grantDerivative securitySEC filing ↗ | $0View disclosure → | |
NNENano Nuclear Energy Inc. | Walker James JohnCEO | S · sale10b5-1 detectedSEC filing ↗ | -$444kView disclosure → | |
NNENano Nuclear Energy Inc. | Walker James JohnCEO | M · exerciseDerivative securityAmended filingSEC filing ↗ | $0View disclosure → | |
NNENano Nuclear Energy Inc. | Walker James JohnCEO | M · exerciseAmended filingSEC filing ↗ | $600kView disclosure → |
Latest Form 4 facts
Quick context from source filings
Latest open-market transaction
sale at Nano Nuclear Energy Inc. on Sep 03, 2026 valued at $444,168.
Review SEC filingLatest buy
No open-market insider purchase is available.
Monthly open-market activity
Last 3 reported months · purchases and sales
View exact monthly values
| Month | Purchases | Sales | Buy value | Sale value | Net value |
|---|---|---|---|---|---|
| Jun 2026 | 0 | 0 | $0.00 | $0.00 | $0.00 |
| Sep 2026 | 0 | 1 | $0.00 | $444,167.50 | -$444,167.50 |
| Oct 2026 | 0 | 0 | $0.00 | $0.00 | $0.00 |
Net value is disclosed purchases minus sales, not profit. A dash means the value is unavailable.
Ownership and transaction size
Ownership and ticket size
Average P/S size$444.2K
Median P/S size$444.2K
Direct4
Indirect0
Oct 01, 2026grant
Filing-only signals
Deterministic matches in this insider's history
Associated companies
Companies in the disclosed reporting history
Open-market buy performance
90-day forward return on this insider's open-market purchases
No open-market purchases in available history
A 90-day purchase return requires an open-market buy. No eligible purchases are recorded in this history.
Disclosed ownership
How reported shareholdings evolved
Non-derivative shares held after reported transactions—not stock prices or a complete portfolio.
2 observations · Jun 3, 2026 – Sep 3, 2026. Window ends at the latest available report, not today.
Selected observation · Sep 3, 2026635,000 shares reported
Inspect transaction View exact observations and source transactions
| Transaction date | Shares held after | Filed | Source |
|---|---|---|---|
| Jun 3, 2026 | 780,000 | Aug 26, 2026 | Amended transaction |
| Sep 3, 2026 | 635,000 | Sep 3, 2026 | View transaction |
Securities and direct/indirect ownership contexts are kept separate and never summed. Joint filings may associate the same disclosed row with multiple owners. Unknown values are omitted, not treated as zero. Lines connect observations for readability; they do not establish holdings between filings, cost basis, or current ownership. Amendments and stock splits require reviewing the source.
Walker James John Insider Activity FAQ
SEC Form 4 context
Who is Walker James John?
Walker James John is a reporting owner in SEC Form 4 filings with reporting owner CIK 0002021757.
Which companies has Walker James John reported transactions for?
Nano Nuclear Energy Inc.
When was Walker James John's latest insider buy?
No open-market insider purchase is available for this period.
When was Walker James John's latest insider sale?
sale at Nano Nuclear Energy Inc. on Sep 03, 2026 valued at $444,168.
Where can I see the original SEC filings?
Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.
Are performance metrics included?
The profile shows average and median 90-day stock returns after open-market purchases when price coverage is available. These are unadjusted stock returns, not realized trading gains. Win rates, benchmark-adjusted returns and conviction scores are not calculated.