Nano Nuclear CTO sells 3,000 shares after RSU vest

Nano Nuclear Energy Inc. Chief Technology Officer Florent Heidet reported equity compensation activity and a related stock sale.

Rhea-AI Filing Summary

Nano Nuclear Energy Inc. Chief Technology Officer Florent Heidet reported equity compensation activity and a related stock sale. On June 3, 2026, 9,185 shares of common stock were issued upon vesting and settlement of Restricted Stock Units granted on June 3, 2025 under the 2025 Equity Incentive Plan, based on a value per RSU of $29.18.

Following this vesting, Heidet executed an open-market sale of 3,000 shares of common stock on June 5, 2026 at a weighted-average price of $24.9525 per share, in multiple trades between $24.8500 and $25.0850. After the sale, he directly holds 6,185 shares of common stock and 29,647 RSUs remain outstanding.

Insider Trade Summary

Exercise and sale activity reported; no spread calculated

Exercise and Sale 3 txns

Insider Heidet Florent

Role Chief Technology Officer

Sold 3,000 shs ($75K)

Approx. gross sale proceeds $75K

Approx. exercise cost $0.00

Type	Security	Shares	Price	Value
Sale	Common Stock	3,000	$24.9525	$75K
Exercise	Restricted Stock Units	9,185	$0.00	$0.00
Exercise	Common Stock	9,185	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 29,647 contracts (Direct); Common Stock — 6,185 shares (Direct)

Footnotes (2)

1. F1. Represents shares of common stock issued upon the vesting and 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 RSU 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, such RSUs were vested and settled.
2. F2. This transaction was executed in multiple trades during the day at prices ranging from $24.8500 to $25.0850. 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.

Key Figures

Shares sold: 3,000 shares Sale price: $24.9525 per share Shares from RSU vesting: 9,185 shares +4 more

7 metrics

Shares sold 3,000 shares Open-market sale of common stock on June 5, 2026

Sale price $24.9525 per share Weighted-average sale price; trades from $24.8500 to $25.0850

Shares from RSU vesting 9,185 shares Common stock issued on June 3, 2026 upon RSU settlement

RSU grant reference value $29.18 per RSU Closing stock price on June 3, 2025 used for RSU grant

Shares held after sale 6,185 shares Direct common stock holdings following June 5, 2026 sale

RSUs remaining 29,647 RSUs Restricted Stock Units outstanding after June 3, 2026 vesting

Net buy/sell shares -3,000 shares Net open-market activity from reported buy/sell transactions

Key Terms

Restricted Stock Units, 2025 Equity Incentive Plan, weighted-average price

3 terms

Restricted Stock Units financial

"Represents shares of common stock issued upon the vesting and settlement of certain Restricted Stock Units ("RSUs") granted on June 3, 2025"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

2025 Equity Incentive Plan financial

"RSUs granted on June 3, 2025 under the Issuer's 2025 Equity Incentive Plan based on a value per RSU of $29.18"

weighted-average price financial

"This transaction was executed in multiple trades during the day at prices ranging from $24.8500 to $25.0850. The weighted-average price is reported above."

Weighted-average price is the average of multiple prices where each price is counted according to its size or importance—larger trades carry more weight than smaller ones, like averaging course grades by credit hours. It matters to investors because it gives a more realistic picture of the true price paid or received, helping assess trade execution, compare performance, calculate cost basis, and value positions more accurately than a simple average.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did Nano Nuclear Energy (NNE) report for Florent Heidet?

Florent Heidet reported RSU vesting into 9,185 common shares and an open-market sale of 3,000 shares. The activity reflects equity compensation vesting under the 2025 Equity Incentive Plan followed by a partial share sale for liquidity or diversification purposes.

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

The CTO sold 3,000 shares of Nano Nuclear Energy common stock at a weighted-average price of $24.9525 per share. Trades occurred between $24.8500 and $25.0850 during the day, according to the disclosed transaction price range.

What RSU award vested for Nano Nuclear Energy (NNE) CTO Florent Heidet?

An RSU grant dated June 3, 2025 vested and settled into 9,185 common shares on June 3, 2026. The award was valued at $29.18 per RSU, based on the Nasdaq closing price when originally granted under the 2025 Equity Incentive Plan.

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

After the reported transactions, the CTO directly holds 6,185 shares of Nano Nuclear Energy common stock. In addition, 29,647 Restricted Stock Units remain outstanding, representing potential future share deliveries subject to vesting conditions.

Were the Nano Nuclear Energy (NNE) CTO’s share sales executed in a single trade?

No, the 3,000 shares were sold in multiple trades during the day at prices ranging from $24.8500 to $25.0850. The filing discloses a weighted-average sale price of $24.9525 per share for reporting purposes.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/05/2026 - 05:31 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED 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).

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^*

Heidet Florent

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Technology 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)

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/03/2026		M(1)		9,185	A	$0	9,185	D
Common Stock	06/05/2026		S(2)		3,000	D	$24.9525(2)	6,185	D

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units(1)	(1)	06/03/2026		M		9,185(1)		(1)	(1)	Common Stock	9,185	$0	29,647	D

Explanation of Responses:

1. Represents shares of common stock issued upon the vesting and 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 RSU 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, such RSUs were vested and settled.

2. This transaction was executed in multiple trades during the day at prices ranging from $24.8500 to $25.0850. 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/ Florent Heidet	06/05/2026
	** Signature of Reporting Person	Date
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)