STOCK TITAN

Nano Nuclear (NNE) CEO exercises options and sells 123,688 shares

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Nano Nuclear Energy Inc. director and CEO James John Walker reported an exercise-and-sell transaction in the company’s common stock. He exercised 70,000 stock options at an exercise price of $3.00 per share and 28,688 Restricted Stock Units that settled into common shares, then sold 123,688 shares in multiple open-market trades at prices generally in the mid-to-high $20s. The filing notes these sales were carried out under a pre-arranged Rule 10b5-1 trading plan. After the transactions, he held 580,000 common shares directly.

Positive

  • None.

Negative

  • None.
Insider Walker James John
Role Chief Executive Officer
Sold 123,688 shs ($3.28M)
Type Security Shares Price Value
Exercise Stock Options 70,000 $0.00 --
Exercise Restricted Stock Units 28,688 $0.00 --
Exercise Common Stock 70,000 $3.00 $210K
Sale Common Stock 46,145 $26.179 $1.21M
Sale Common Stock 22,380 $27.063 $606K
Sale Common Stock 1,475 $27.90 $41K
Exercise Common Stock 28,688 $0.00 --
Sale Common Stock 25,792 $26.769 $690K
Sale Common Stock 2,624 $27.555 $72K
Sale Common Stock 201 $28.689 $6K
Sale Common Stock 71 $29.91 $2K
Sale Common Stock 25,000 $26.038 $651K
Holdings After Transaction: Stock Options — 430,000 shares (Direct, null); Restricted Stock Units — 146,398 shares (Direct, null); Common Stock — 650,000 shares (Direct, null)
Footnotes (1)
  1. 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 $26.7000. 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. 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. 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. 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. 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. 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. 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 $25.7100 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.
Shares sold 123,688 shares Total common shares sold in open-market transactions on June 3, 2026
Option exercise 70,000 shares at $3.00/share Common shares acquired via stock option exercise
RSU settlement 28,688 shares Common shares issued upon RSU settlement on June 3, 2026
Post-transaction holdings 580,000 shares Common shares directly held after all reported transactions
Sample sale price $29.9100 per share Price for a 71-share open-market sale
Exercise-and-sell net direction Net-sell 123,688 shares Net share change from combined sales and exercises
Rule 10b5-1 trading plan financial
"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025."
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
Restricted Stock Units ("RSUs") financial
"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"
Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.
weighted-average price financial
"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."
Equity Incentive Plan financial
"RSUs granted on June 3, 2025 under the Issuer's 2025 Equity Incentive Plan based on a value per share of $29.18"
An equity incentive plan is a program that gives employees, executives or directors the right to receive company stock or options to buy stock as part of their pay. Think of it as offering slices of future company profit to motivate people to boost long‑term performance; for investors it matters because it can align employee goals with shareholder value but also increases the number of shares outstanding, which can dilute existing ownership.
Stock Options financial
"Stock Options transaction with 70,000.0000 derivative shares and a conversion or exercise price of 3.0000"
Stock options are agreements that give a person the right to buy or sell a company's stock at a specific price within a certain time frame. They are often used as a reward or incentive, similar to a coupon that can be used later if the stock price rises, allowing the holder to make a profit.
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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Walker James John

(Last)(First)(Middle)
10 TIMES SQUARE, 30TH FLOOR

(Street)
NEW YORK NEW YORK 10018

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Nano Nuclear Energy Inc. [ NNE ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
Chief Executive Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/03/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock06/03/2026M(1)70,000A$3650,000D
Common Stock06/03/2026S(3)46,145D$26.179(4)603,855D
Common Stock06/03/2026S(3)22,380D$27.063(5)581,475D
Common Stock06/03/2026S(3)1,475D$27.9(6)580,000D
Common Stock06/03/2026M(2)28,688A$0608,688D
Common Stock06/03/2026S(3)25,792D$26.769(7)582,896D
Common Stock06/03/2026S(3)2,624D$27.555(8)580,272D
Common Stock06/03/2026S(3)201D$28.689(9)580,071D
Common Stock06/03/2026S(3)71D$29.91(10)580,000D
Common Stock06/03/2026S(3)25,000D$26.038(11)555,000D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Options(1)$306/03/2026M70,000 (1) (1)Common Stock70,000$0430,000D
Restricted Stock Units(2)$006/03/2026M28,688(2) (2) (2)Common Stock28,688$0146,398D
Explanation of Responses:
1. 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. 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.
3. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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.
11. 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.
/s/ James John Walker06/05/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What did Nano Nuclear Energy (NNE) CEO James John Walker report in this Form 4?

James John Walker reported a combination of option and RSU exercises plus open-market sales of Nano Nuclear Energy common stock. The filing shows both acquisition of shares through exercises and subsequent sales executed on the same date.

How many Nano Nuclear Energy (NNE) shares did the CEO sell and at what prices?

The CEO sold 123,688 shares of Nano Nuclear Energy common stock in open-market transactions. Reported per-share prices include amounts such as $26.0380, $26.7690, $27.5550, $27.9000 and $29.9100, often disclosed as weighted-average prices over multiple trades.

What equity awards did the Nano Nuclear Energy (NNE) CEO exercise in this filing?

He exercised 70,000 stock options with an exercise price of $3.00 per share and 28,688 Restricted Stock Units that settled into common stock. The RSUs were granted under Nano Nuclear Energy’s 2025 Equity Incentive Plan and vested and settled on the transaction date.

Was the Nano Nuclear Energy (NNE) CEO’s stock sale pre-planned under Rule 10b5-1?

Yes. A footnote states that at least one of the transactions was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025, indicating the sales were pre-arranged rather than newly decided on the trade date.

How many Nano Nuclear Energy (NNE) shares does the CEO hold after these transactions?

Following the reported exercises and sales, the Form 4 shows James John Walker directly holding 580,000 shares of Nano Nuclear Energy common stock. This figure reflects his position immediately after completing all the transactions disclosed for the reported date.

What are the key dates tied to the Nano Nuclear Energy (NNE) CEO’s options and RSUs?

The options exercised at $3.00 per share were fully vested and exercisable on June 7, 2023, with expiry on June 7, 2026. The RSUs were granted on June 3, 2025, with one-third vesting and settling into shares on June 3, 2026.