X0609 4 2026-06-03 0 0001923891 Nano Nuclear Energy Inc. NNE 0001999118 Yu Jiang false 10 TIMES SQUARE, 30TH FLOOR NEW YORK NY 10018 1 1 1 0 President and Chairman 1 Common Stock 2026-06-03 4 S 0 312553 26.2987 D 8411447 I By I Financial Ventures Group LLC Common Stock 2026-06-03 4 S 0 168626 27.1617 D 8242821 I By I Financial Ventures Group LLC Common Stock 2026-06-03 4 S 0 10035 27.8327 D 8232786 I By I Financial Ventures Group LLC Common Stock 2026-06-03 4 S 0 3571 28.9772 D 8229215 I By I Financial Ventures Group LLC Common Stock 2026-06-03 4 S 0 5215 29.91 D 8224000 I By I Financial Ventures Group LLC Common Stock 2026-06-03 4 M 0 200000 3 A 8424000 I By I Financial Ventures Group LLC Common Stock 2026-06-03 4 S 0 125021 26.2987 D 8298979 I By I Financial Ventures Group LLC Common Stock 2026-06-03 4 S 0 67451 27.1617 D 8231528 I By I Financial Ventures Group LLC Common Stock 2026-06-03 4 S 0 4014 27.8327 D 8227514 I By I Financial Ventures Group LLC Common Stock 2026-06-03 4 S 0 1429 28.9772 D 8226085 I By I Financial Ventures Group LLC Common Stock 2026-06-03 4 S 0 2085 29.9100 D 8224000 I By I Financial Ventures Group LLC Common Stock 2026-06-03 4 M 0 45900 0 A 8269900 D Common Stock 2026-06-03 4 S 0 30250 26.2900 D 8239650 D Common Stock 2026-06-03 4 S 0 13050 27.0680 D 8226600 D Common Stock 2026-06-03 4 S 0 1400 27.8300 D 8225200 D Common Stock 2026-06-03 4 S 0 500 28.8900 D 8224700 D Common Stock 2026-06-03 4 S 0 700 29.9100 D 8224000 D Stock Options 3 2026-06-03 4 M 0 200000 0 D Common Stock 20000 300000 I By I Financial Ventures Group LLC Restricted Stock Units 0 2026-06-03 4 M 0 45900 0 D Common Stock 45900 275778 D This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025. Represents shares of common stock issued upon exercise of certain options originally granted to the reporting person through I Financial (as defined below) at the exercise price of $3 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. 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. Represents shares of common stock issued upon the settlement of 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 executed in multiple trades during the day at prices ranging from $25.7000 to $26.6900. 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 $26.7000 to $27.6900. 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 $27.7200 to $28.3500. 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 $28.7700 to $29.0500. 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 $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. This transaction was executed in multiple trades during the day at prices ranging from $25.7000 to $26.6900. 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 $26.7000 to $27.6900. 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 $27.7200 to $28.3500. 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 $28.7700 to $29.0500. 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 $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. This transaction was executed in multiple trades during the day at prices ranging from $25.7000 to $26.6900. 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 $26.7000 to $27.6400. 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 $27.7000 to $28.5000. 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. This transaction was executed in multiple trades during the day at prices ranging from $28.7700 to $28.9200. 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 $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/ Jiang Yu 2026-06-05