Nano Nuclear Energy (NNE) 4: Yu Kenny Joe Yung bought 30,177 shares of Common Stock at $… (Dec 30, 2025)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2025-12-23 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: Nano Nuclear Energy Inc. (NNE) CIK: 0001923891 --- Reporting Owner --- Name: Yu Kenny Joe Yung CIK: 0002021805 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2025-12-23 | Code: M (Exercise of derivative) Shares: +30,177 | Price: $3.00 Total Value: $90,531.00 Shares Owned After: 45,177 | Ownership: D (Direct) Footnotes: [F1] Represents the number of shares of common stock issued upon exercise of certain options originally granted to the reporting person at the exercise price of $3.00 per share, which were fully vested and exercisable on June 7, 2023, with expiry on June 7, 2026. On December 23, 2025, such options were exercised. [Transaction #2] Security: Common Stock Date: 2025-12-23 | Code: S (Open market sale) Shares: -30,177 | Price: $32.25 Total Value: $973,259.55 Shares Owned After: 15,000 | Ownership: D (Direct) Footnotes: [F2] 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 $31.7400 to $32.7300. 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 #3] Security: Common Stock Date: 2025-12-23 | Code: M (Exercise of derivative) Shares: +9,823 | Price: $3.00 Total Value: $29,469.00 Shares Owned After: 24,823 | Ownership: D (Direct) Footnotes: [F1] Represents the number of shares of common stock issued upon exercise of certain options originally granted to the reporting person at the exercise price of $3.00 per share, which were fully vested and exercisable on June 7, 2023, with expiry on June 7, 2026. On December 23, 2025, such options were exercised. [Transaction #4] Security: Common Stock Date: 2025-12-23 | Code: S (Open market sale) Shares: -9,823 | Price: $32.98 Total Value: $323,946.82 Shares Owned After: 15,000 | Ownership: D (Direct) Footnotes: [F2] This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025. [F4] This transaction was executed in multiple trades during the day at prices ranging from $32.7400 to $33.5000. 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. --- Derivative Transactions --- [Transaction #1] Security: Stock Options Date: 2025-12-23 | Code: M (Exercise of derivative) Shares: -40,000 | Price: $0.00 Shares Owned After: 5,000 | Ownership: D (Direct) Footnotes: [F1] Represents the number of shares of common stock issued upon exercise of certain options originally granted to the reporting person at the exercise price of $3.00 per share, which were fully vested and exercisable on June 7, 2023, with expiry on June 7, 2026. On December 23, 2025, such options were exercised. [F1] Represents the number of shares of common stock issued upon exercise of certain options originally granted to the reporting person at the exercise price of $3.00 per share, which were fully vested and exercisable on June 7, 2023, with expiry on June 7, 2026. On December 23, 2025, such options were exercised. [F1] Represents the number of shares of common stock issued upon exercise of certain options originally granted to the reporting person at the exercise price of $3.00 per share, which were fully vested and exercisable on June 7, 2023, with expiry on June 7, 2026. On December 23, 2025, such options were exercised. --- Footnotes (Complete Index) --- F1: Represents the number of shares of common stock issued upon exercise of certain options originally granted to the reporting person at the exercise price of $3.00 per share, which were fully vested and exercisable on June 7, 2023, with expiry on June 7, 2026. On December 23, 2025, such options were exercised. F2: 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 $31.7400 to $32.7300. 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. F4: This transaction was executed in multiple trades during the day at prices ranging from $32.7400 to $33.5000. 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/ Kenny Joe Yung Yu (2025-12-30)