Nano Nuclear Energy (NNE) 4: Hare Diane Elizabeth bought 14,640 shares of Common Stock a… (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: Hare Diane Elizabeth CIK: 0002021755 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2025-12-23 | Code: M (Exercise of derivative) Shares: +14,640 | Price: $3.00 Total Value: $43,920.00 Shares Owned After: 14,640 | 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: -14,640 | Price: $32.24 Total Value: $471,986.28 Shares Owned After: 0 | 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 $31.7200 to $32.7100. 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: +5,360 | Price: $3.00 Total Value: $16,080.00 Shares Owned After: 5,360 | 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: -5,360 | Price: $32.96 Total Value: $176,655.42 Shares Owned After: 0 | 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 $32.7200 to $33.5700. 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: -20,000 | Price: $0.00 Shares Owned After: 25,000 | 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 $31.7200 to $32.7100. 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 $32.7200 to $33.5700. 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/ Diane Elizabeth Hare (2025-12-30)