Form4insider filings, from the source

Company · CIK 0001923891 · SIC 4911 — Electric Services · Nasdaq

Nano Nuclear Energy Inc. · NNE

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $52.3M · 10net −$52.3M
$10k$10k$1M$1M$100M$100MbuyssalesJun 2Jun 17Jul 3Jul 19Aug 3Aug 19Sep 4

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 3, 2026 SForm 4 →Sep 3, 5:49 pm EDTJames John WalkerChief Executive Officer, Director25,000$17.77$444,168635,000−3.79%10b5-1
Sep 1, 2026 SForm 4 →Sep 3, 4:05 pm EDTJiang YuPresident and Chairman, Director, 10% Owner474,500$17.46$8,283,4497,749,500−5.77%10b5-1
Sep 1, 2026 SForm 4 →Sep 3, 4:05 pm EDTJames John WalkerChief Executive Officer, Director25,000$17.44$436,065660,000−3.65%10b5-1
Jun 5, 2026 SForm 4 →Jun 5, 5:31 pm EDTFlorent HeidetChief Technology Officer3,000$24.95$74,8586,185−32.7%
Jun 5, 2026 SForm 4 →Jun 5, 5:26 pm EDTSeth Jason BerlDirector3,750$24.92$93,4597,586−33.1%
Jun 3, 2026 MForm 4/A →Aug 26, 4:05 pm EDTJames John WalkerChief Executive Officer, Director200,000$3.00$600,000780,000—
Jun 3, 2026 MForm 4 →Jun 5, 6:12 pm EDTTsun Yee LawDirector3,428——78,428—
Jun 3, 2026 SForm 4 →Jun 5, 6:12 pm EDTDiane Elizabeth HareDirector3,428$26.64$91,3220−100%10b5-1
Jun 3, 2026 MForm 4 →Jun 5, 6:12 pm EDTDiane Elizabeth HareDirector3,428——3,428—10b5-1
Jun 3, 2026 SForm 4 →Jun 5, 5:52 pm EDTJames John WalkerChief Executive Officer, Director123,688$26.49$3,276,423555,000−18.2%10b5-1
Jun 3, 2026 MForm 4 →Jun 5, 5:52 pm EDTJames John WalkerChief Executive Officer, Director98,688$3.00$210,000608,688—10b5-1
Jun 3, 2026 MForm 4 →Jun 5, 5:32 pm EDTJiang YuPresident and Chairman, Director, 10% Owner245,900$3.00$600,0008,269,900—10b5-1
Jun 3, 2026 SForm 4 →Jun 5, 5:32 pm EDTJiang YuPresident and Chairman, Director, 10% Owner745,900$26.68$19,896,9858,224,000−8.32%10b5-1
Jun 3, 2026 MForm 4 →Jun 5, 5:31 pm EDTFlorent HeidetChief Technology Officer9,185——9,185—
Jun 3, 2026 SForm 4 →Jun 5, 5:31 pm EDTJaisun GarchaChief Financial Officer37,215$26.48$985,617345,000−9.74%10b5-1
Jun 3, 2026 MForm 4 →Jun 5, 5:31 pm EDTJaisun GarchaChief Financial Officer37,215$3.00$60,000362,215—10b5-1
Jun 3, 2026 MForm 4 →Jun 5, 5:29 pm EDTI Financial Ventures Group LLC10% Owner200,000$3.00$600,0008,424,000—10b5-1
Jun 3, 2026 SForm 4 →Jun 5, 5:29 pm EDTI Financial Ventures Group LLC10% Owner700,000$26.68$18,674,1318,224,000−7.84%10b5-1
Jun 3, 2026 MForm 4 →Jun 5, 5:28 pm EDTKenny Joe Yung YuDirector3,428——18,428—
Jun 3, 2026 MForm 4 →Jun 5, 5:26 pm EDTSeth Jason BerlDirector7,500——11,336—

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Jun 3, 2026 MForm 4/A →Aug 26, 4:05 pm EDTJames John WalkerChief Executive Officer, Director200,000——300,000—
Jun 3, 2026 MForm 4 →Jun 5, 6:12 pm EDTTsun Yee LawDirector3,428——2,968—
Jun 3, 2026 MForm 4 →Jun 5, 6:12 pm EDTDiane Elizabeth HareDirector3,428——2,968—10b5-1
Jun 3, 2026 MForm 4 →Jun 5, 5:52 pm EDTJames John WalkerChief Executive Officer, Director98,688——146,398—10b5-1
Jun 3, 2026 MForm 4 →Jun 5, 5:32 pm EDTJiang YuPresident and Chairman, Director, 10% Owner245,900——275,778—10b5-1
Jun 3, 2026 MForm 4 →Jun 5, 5:31 pm EDTFlorent HeidetChief Technology Officer9,185——29,647—
Jun 3, 2026 MForm 4 →Jun 5, 5:31 pm EDTJaisun GarchaChief Financial Officer37,215——87,845—10b5-1
Jun 3, 2026 MForm 4 →Jun 5, 5:29 pm EDTI Financial Ventures Group LLC10% Owner200,000——0—10b5-1
Jun 3, 2026 MForm 4 →Jun 5, 5:28 pm EDTKenny Joe Yung YuDirector3,428——2,968—
Jun 3, 2026 MForm 4 →Jun 5, 5:26 pm EDTSeth Jason BerlDirector7,500——2,968—