Form 4 for NNE Nano Nuclear Energy Inc.
Accepted 2026-06-05 17:52:00 ET · period of report 2026-06-03 · accession 0001493152-26-027559 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DMT | 2026-06-05 17:52 | 2026-06-03 | NNE | Walker James John | CEO, Dir | M - OptEx | $2.13 | +98.7K | 608.7K | +19% | +$210.0K |
| DMT | 2026-06-05 17:52 | 2026-06-03 | NNE | Walker James John | CEO, Dir | S - Sale+OE | $26.49 | -123.7K | 555.0K | -18% | -$3.28M |
| DMT | 2026-06-05 17:52 | 2026-06-03 | NNE | Walker James John | CEO, Dir | M - OptEx | $0.00 | -98.7K | 146.4K | -40% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-06-03 | M | A | 70,000 | $3.00 | 650,000 | D | — | — | (F1) 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. |
| 2 | Common | Common Stock | 2026-06-03 | S | D | 46,145 | $26.18 | 603,855 | D | — | — | (F3) 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 $25.7100 to $26.7000. 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. |
| 3 | Common | Common Stock | 2026-06-03 | S | D | 22,380 | $27.06 | 581,475 | D | — | — | (F3) This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025. (F5) This transaction was executed in multiple trades during the day at prices ranging from $26.7050 to $27.6800. 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. |
| 4 | Common | Common Stock | 2026-06-03 | S | D | 1,475 | $27.90 | 580,000 | D | — | — | (F3) This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025. (F6) This transaction was executed in multiple trades during the day at prices ranging from $27.7200 to $28.3750. 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. |
| 5 | Common | Common Stock | 2026-06-03 | M | A | 28,688 | $0.00 | 608,688 | D | — | — | (F2) 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. |
| 6 | Common | Common Stock | 2026-06-03 | S | D | 25,792 | $26.77 | 582,896 | D | — | — | (F3) This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025. (F7) This transaction was executed in multiple trades during the day at prices ranging from $26.3700 to $27.3400. 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. |
| 7 | Common | Common Stock | 2026-06-03 | S | D | 2,624 | $27.55 | 580,272 | D | — | — | (F3) This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025. (F8) This transaction was executed in multiple trades during the day at prices ranging from $27.3700 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. |
| 8 | Common | Common Stock | 2026-06-03 | S | D | 201 | $28.69 | 580,071 | D | — | — | (F3) This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025. (F9) This transaction was executed in multiple trades during the day at prices ranging from $28.6600 to $28.9000. 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. |
| 9 | Common | Common Stock | 2026-06-03 | S | D | 71 | $29.91 | 580,000 | D | — | — | (F3) This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025. (F10) 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. |
| 10 | Common | Common Stock | 2026-06-03 | S | D | 25,000 | $26.04 | 555,000 | D | — | — | (F3) This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025. (F11) This transaction was executed in multiple trades during the day at prices ranging from $25.7100 to $26.3700. 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. |
| 11 | Derivative | Stock Options | 2026-06-03 | M | D | 70,000 | $0.00 | 430,000 | D | $3.00 · — to — | 70,000 Common Stock | (F1) 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. (F1) 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. (F1) 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. |
| 12 | Derivative | Restricted Stock Units | 2026-06-03 | M | D | 28,688 | $0.00 | 146,398 | D | $0.00 · — to — | 28,688 Common Stock | (F2) 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. (F2) 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. (F2) 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. (F2) 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. |