X0609 4 2026-06-03 0 0001923891 Nano Nuclear Energy Inc. NNE 0001999680 Garcha Jaisun false 10 TIMES SQUARE, 30TH FLOOR NEW YORK NY 10018 0 1 0 0 Chief Financial Officer 1 Common Stock 2026-06-03 4 M 0 20000 3.00 A 365000 D Common Stock 2026-06-03 4 S 0 20000 26.083 D 345000 D Common Stock 2026-06-03 4 M 0 17215 0 A 362215 D Common Stock 2026-06-03 4 S 0 15223 26.844 D 346992 D Common Stock 2026-06-03 4 S 0 1761 27.594 D 345231 D Common Stock 2026-06-03 4 S 0 174 28.81 D 345057 D Common Stock 2026-06-03 4 S 0 57 29.91 D 345000 D Stock Options 3.0 2026-06-03 4 M 0 20000 0 D Common Stock 20000 150000 D Restricted Stock Units 0 2026-06-03 4 M 0 17215 0 D Common Stock 17215 87845 D Represents 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 June 3, 2026, such options were exercised. Represents shares of common stock issued upon the settlement of certain Restricted Stock Units ("RSUs") granted on June 3, 2025 under the Issuer's 2025 Equity Incentive Plan based on a value per share of $29.18, the closing price of the Issuer's common stock as reported on The Nasdaq Capital Market on June 3, 2025. On June 3, 2026, one third (1/3) of such RSUs were vested and settled. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025. This transaction was executed in multiple trades during the day at prices ranging from $25.7100 to $26.4300. 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. This transaction was executed in multiple trades during the day at prices ranging from $26.4300 to $27.4000. 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. This transaction was executed in multiple trades during the day at prices ranging from $27.4300 to $27.9400. 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. This transaction was executed at a price of $28.8100. 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. This transaction was executed at a price of $29.9100. 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. /s/ Jaisun Garcha 2026-06-05