X0508 4 2025-12-24 0 0001923891 Nano Nuclear Energy Inc. NNE 0001999118 Yu Jiang 10 TIMES SQUARE, 30TH FLOOR NEW YORK NY 10018 1 1 1 0 President and Chairman 1 Common Stock 2025-12-24 4 S 0 337612 30.0640 D 9662388 I By I Financial Ventures Group LLC Common Stock 2025-12-24 4 S 0 38049 30.7518 D 9624339 I By I Financial Ventures Group LLC Common Stock 2025-12-24 4 S 0 2813 31.4333 D 9621526 I By I Financial Ventures Group LLC Common Stock 2025-12-26 4 S 0 325633 28.4447 D 9295893 I By I Financial Ventures Group LLC Common Stock 2025-12-26 4 S 0 7436 29.4108 D 9288457 I By I Financial Ventures Group LLC Common Stock 2025-12-29 4 S 0 176457 27.0300 D 9112000 I By I Financial Ventures Group LLC The reporting person is the sole shareholder and director of I Financial Ventures Group LLC ("I Financial"), a limited liability company incorporated under the laws of Delaware, which is the record holder of the securities reported herein. The reporting person, as such, has investment control over the securities of the issuer held by I Financial and may be deemed the beneficial owner of such securities. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person through I Financial, in September 2025, and was executed in the account of I Financial. This transaction was executed in multiple trades during the day at prices ranging from $29.3200 to $30.3100. 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 $30.3200 to $31.3100. 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 $31.3700 to $31.4500. 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 $28.0300 to $28.9100. 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 $29.1000 to $29.7600. 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 $27.0300. 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/ Jiang Yu 2025-12-30