Nano Nuclear Energy (NNE) 4: Walker James John sold 22,459 shares of Common Stock at $30… (Dec 30, 2025)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2025-12-24 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: Nano Nuclear Energy Inc. (NNE) CIK: 0001923891 --- Reporting Owner --- Name: Walker James John CIK: 0002021757 Role: Director, Officer (Chief Executive Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2025-12-24 | Code: S (Open market sale) Shares: -22,459 | Price: $30.03 Total Value: $674,383.13 Shares Owned After: 277,541 | Ownership: D (Direct) Footnotes: [F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025. [F2] This transaction was executed in multiple trades during the day at prices ranging from $29.480 to $30.425. The weighted-average price is reported above. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. [Transaction #2] Security: Common Stock Date: 2025-12-24 | Code: S (Open market sale) Shares: -2,541 | Price: $30.97 Total Value: $78,687.66 Shares Owned After: 275,000 | Ownership: D (Direct) Footnotes: [F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025. [F3] This transaction was executed in multiple trades during the day at prices ranging from $30.49 to $31.45. The weighted-average price is reported above. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. --- Footnotes (Complete Index) --- F1: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025. F2: This transaction was executed in multiple trades during the day at prices ranging from $29.480 to $30.425. The weighted-average price is reported above. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. F3: This transaction was executed in multiple trades during the day at prices ranging from $30.49 to $31.45. The weighted-average price is reported above. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. --- Signature --- /s/ /s/ James John Walker (2025-12-30)