SEC Form S-3 filed by Nano Nuclear Energy Inc.

As filed with the Securities and Exchange Commission on June 9, 2025

Registration No. 333-[   ]

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-3

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

NANO NUCLEAR ENERGY INC.

(Exact name of registrant as specified in its charter)

10 Times Square, 30^th Floor

New York, NY 10018
Telephone: (212) 634-9206 

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

James Walker

Chief Executive Officer

Nano Nuclear Energy Inc.

10 Times Square, 30^th Floor

New York, NY 10018
Telephone: (212) 634-9206

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Please send a copy of all communications to:

Richard I. Anslow, Esq.

Lawrence A. Rosenbloom, Esq.

Ellenoff Grossman & Schole LLP

1345 Avenue of the Americas

New York, NY 10105

Tel: (212) 370-1300

Approximate date of commencement proposed sale to the public: From time to time after the effective date of this Registration Statement.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box. ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box. ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☐

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933, as amended, or until the registration statement shall become effective on such date as the U.S. Securities and Exchange Commission, acting pursuant to Section 8(a), may determine.

The information contained in this preliminary prospectus is not complete and may be changed. The selling stockholders named in this prospectus may not sell these securities until the registration statement filed with the U.S. Securities and Exchange Commission is effective. This preliminary prospectus is not an offer to sell these securities and the selling stockholders are not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

Up to 3,888,889 Shares of Common Stock

This prospectus relates to the resale by the selling stockholders named herein, including their respective transferees, assigns, pledgees or donees, or their respective successors (who we refer to herein as the “Selling Stockholders”), of up to 3,888,889 shares of our common stock, par value $0.0001 per share (which we refer to herein as the “Selling Stockholder Shares”). The Selling Stockholders were institutional investors in a private placement by our company which closed on May 28, 2025. For more information, see “Selling Stockholders.”

We are not selling any securities under this prospectus and will not receive any of the proceeds from the sale of the Selling Stockholder Shares by the Selling Stockholders. The Selling Stockholders may sell Selling Stockholder Shares from time to time in the principal markets on which our common stock is quoted at the prevailing market price, at prices related to prevailing market prices or in negotiated transactions. The Selling Stockholders may sell the Selling Stockholder Shares to or through underwriters, broker-dealers or agents, who may receive compensation in the form of discounts, concessions or commissions from the Selling Stockholders, the purchasers of the Selling Stockholder Shares, or both. We are registering the Selling Stockholder Shares pursuant to certain registration rights granted to the Selling Stockholders. The timing and amount of any sale of Selling Stockholder Shares is within the sole discretion of the Selling Stockholders. We do not know when or in what amount of Selling Stockholder Shares the Selling Stockholders may offer for sale. We will pay the expenses of registering the Selling Stockholder Shares, including legal and accounting fees. All selling and other expenses incurred by a Selling Stockholder will be borne by such Selling Stockholder. See “Plan of Distribution” for additional information.

Our common stock is listed on The Nasdaq Capital Market under the symbol “NNE.” On June 6, 2025, the last reported sale price of our common stock on The Nasdaq Capital Market was $31.19 per share.

An investment in the common stock offered through this prospectus is speculative and involves a high degree of risk. You should carefully consider the risk factors beginning on page 15 of this prospectus and those risk factors disclosed herein before purchasing any of the securities offered by this prospectus. You should read the entire prospectus and any amendments or supplements carefully before you make your investment decision.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

The date of this prospectus is June [____], 2025.

TABLE OF CONTENTS

You should only rely on the information contained in this prospectus. We have not authorized anyone to provide you with additional or different information. The information contained in this prospectus is accurate only as of its date, regardless of its time of delivery or of any sale of the common stock offered hereby. Our business, financial condition, operating results, and prospects may have changed since that date.

For investors outside the United States: We have not done anything that would permit this offering or possession or distribution of this prospectus in any jurisdiction where action for that purpose is required, other than in the United States. Persons outside of the United States who come into possession of this prospectus must inform themselves about, and observe any restrictions relating to, the offering of the common stock, and the distribution of this prospectus outside of the United States.

We incorporate by reference important information into this prospectus. You may obtain the information incorporated by reference without charge by following the instructions under “Where You Can Find More Information.” This prospectus contains summaries of certain provisions contained in some of the documents described herein, but reference is made to the actual documents for complete information. All of the summaries are qualified in their entirety by the actual documents. Copies of some of the documents referred to herein have been filed, will be filed or will be incorporated by reference as exhibits to the registration statement of which this prospectus forms a part, and you may obtain copies of those documents as described below. You should carefully read this prospectus as well as additional information described under “Incorporation of Certain Information by Reference,” before deciding to invest in our securities. This prospectus contains forward-looking statements that are subject to a number of risks and uncertainties, many of which are beyond our control. See “Risk Factors” and “Cautionary Note Regarding Forward-Looking Statements.”

Industry and Market Data: Unless otherwise indicated, information in this prospectus concerning economic conditions, our industry, our markets and our competitive position is based on a variety of sources, including information from third-party industry analysts and publications and our own estimates and research. Some of the industry and market data contained in this prospectus are based on third-party industry publications. This information involves a number of assumptions, estimates and limitations.

The industry publications, surveys and forecasts and other public information generally indicate or suggest that their information has been obtained from sources believed to be reliable. None of the third-party industry publications used in this prospectus were prepared on our behalf. The industry in which we operate is subject to a high degree of uncertainty and risk due to a variety of factors, including those described in “Risk Factors” in this prospectus or incorporated by reference herein. These and other factors could cause results to differ materially from those expressed in these publications.

Trademarks: We own or have rights to trademarks or trade names that we use in connection with the operation of our businesses, our corporate names, logos and website names. This prospectus contains references to our trademarks and service marks and to those belonging to other entities. Solely for convenience, trademarks and trade names referred to in this prospectus may appear without the ® or ^™ symbols, but such references are not intended to indicate, in any way, that we will not assert, to the fullest extent possible under applicable law, our rights or the rights of the applicable licensor to these trademarks and trade names. We do not intend our use or display of other companies’ trade names, trademarks, or service marks to imply a relationship with, or endorsement or sponsorship of us by any other companies. All other trademarks are the property of their respective owners.

CAUTIONARY NOTE REGARDING FORWARD LOOKING STATEMENTS

The information contained or incorporated by reference in this prospectus contains “forward-looking statements” within the meaning of Section 27A of the Securities Act, and Section 21E of the Exchange Act. All statements contained in this prospectus other than statements of historical fact, including statements regarding our future operating results and financial position, our business strategy and plans, market growth, and our objectives for future operations, are forward-looking statements. These forward-looking statements involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements.

You can identify some of these forward-looking statements by words or phrases such as “may,” “will,” “could,” “would,” “expect,” “anticipate,” “aim,” “estimate,” “intend,” “plan,” “believe,” “is/are likely to,” “potential,” “project,” “target,” “continue” or the negative of these terms or other similar expressions, although not all forward-looking statements contain these words. The forward-looking statements in this prospectus are only predictions and are based largely on our current expectations and projections about future events and financial trends that we reasonably believe may affect our business, financial condition, and results of operations. Although we believe the expectations reflected in any of our forward-looking statements are reasonable, actual results could differ materially from those projected or assumed in any of our forward-looking statements. Our future financial condition and results of operations, as well as any forward-looking statements, are subject to change given the inherent risks and uncertainties of market and industry conditions.

These forward-looking statements present our estimates and assumptions only as of the date of this prospectus and are subject to many significant known and unknown risks, uncertainties, and assumptions. Accordingly, you are cautioned not to place undue reliance on forward-looking statements, which speak only as of the dates on which they are made. Important factors that could cause actual results to differ materially from those in the forward-looking statements include, but are not limited to, those summarized below:

The foregoing does not represent an exhaustive list of matters that may be covered by the forward-looking statements contained herein or risk factors that we are faced with. Forward-looking statements necessarily involve risks and uncertainties, and our actual results could differ materially from those anticipated in the forward-looking statements due to a number of factors, including those set forth under “Risk Factors” and elsewhere contained or incorporated by reference in this prospectus. All written and oral forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by the cautionary statements contained above and throughout this prospectus. Prior to investing in our common stock, you should read this prospectus, our filings incorporated by reference herein and the documents we have filed as exhibits to this registration statement of which this prospectus is a part completely and with the understanding that our actual future results may be materially different from what we currently expect.

Except as required by applicable law, we do not plan to publicly update or revise any forward-looking statements contained herein, whether because of any new information, future events, changed circumstances or otherwise.

RISK FACTORS

An investment in our securities involves risks. Before you invest in our securities, you should carefully consider the risk factors included in our 2024 Annual Report on Form 10-K (as defined below), subsequent Quarterly Reports on Form 10-Q (as defined below) and those that may be included in the prospectus, as well as the cautionary notes regarding forward-looking statements included or incorporated by reference herein, together with all of the other information included in this prospectus and the documents we incorporate by reference. See “Incorporation of Documents by Reference” on page 23.

If any of these risks were to materialize, our business, results of operations, cash flows and financial condition could be materially adversely affected. In that case, our ability to pay interest on, or the principal of, any debt securities may be reduced, the trading price of our securities could decline and you could lose all or part of your investment.

USE OF PROCEEDS

We will not receive any proceeds from the sale of the Selling Stockholder Shares by the Selling Stockholders.

The Selling Stockholders will pay any expenses incurred by the them for brokerage, accounting, tax or legal services or any other expenses incurred by the Selling Stockholders in disposing of their Selling Stockholder Shares. We will bear all other costs, fees and expenses incurred in effecting the registration of the Selling Stockholder Shares covered by this prospectus, including, without limitation, all registration fees and fees and expenses of our counsel and our accountants.

DIVIDEND POLICY

We have never declared or paid any cash dividends on our capital stock, and we do not anticipate paying any cash dividends in the foreseeable future. The payment of dividends, if any, in the future is within the discretion of our board of directors and will depend on our earnings, capital requirements and financial condition and other relevant facts. We currently intend to retain all future earnings, if any, to finance the development and growth of our business.

DETERMINATION OF OFFERING PRICE

The Selling Stockholders will each, in their respective discretions, offer Selling Stockholder Shares at the prevailing market prices for our common stock or privately negotiated prices. The offering price of the Selling Stockholder Shares does not necessarily bear any relationship to our book value, assets, past operating results, financial condition or any other established criteria of value.

SELLING STOCKHOLDERS

Description of the May 2025 Private Placement

On May 26, 2025, we entered into a Securities Purchase Agreement (the “May 2025 SPA”) with each of six institutional investors (the “May 2025 Investors”), pursuant to which we agreed to offer and sell an aggregate of 3,888,889 shares of our common stock, par value $0.0001 per share, in a private placement (the “May 2025 Private Placement”) for the aggregate gross proceeds of approximately $105 million. The May 2025 Private Placement closed on May 28, 2025.

After deducting the placement agent fees and estimated offering expenses payable by us, we received net proceeds of approximately $99 million. We intend to use these net proceeds for research and development, marketing, general working capital and general corporate purposes, which could include potential acquisitions of complementary businesses or assets.

In the May 2025 Private Placement, we issued and sold an aggregate of 3,888,889 shares of our common stock at a purchase price of $27.00 per share to the May 2025 Investors. The May 2025 SPA includes standard representations, warranties and covenants of the Company and the May 2025 Investors, including a restriction on future issuances of our capital stock or filing a registration statement or any amendment or supplement thereto (subject to certain exceptions) for a period of thirty (30) days following effectiveness of our May 2025 Resale Registration Statement (as defined below) required by the May 2025 RRA (as defined below).

On May 26, 2025, in connection with the May 2025 Private Placement, we entered into a registration rights agreement with each of the May 2025 Investors (the “May 2025 RRA”), pursuant to which we agreed to file a registration statement (the “May 2025 Resale Registration Statement”) with the SEC covering the resale of 3,888,889 shares of our common stock by no later than June 10, 2025 (the date of filing, the “May 2025 Filing Date”), with the May 2025 Resale Registration Statement to be effective within 30 days of the May 2025 Filing Date (if it is not subject to review by the SEC), or within 60 days after the May 2025 Filing Date (if it is subject to full review by the SEC). The May 2025 Investors are also entitled (subject to certain exceptions) to customary piggyback registration rights during the period in which the May 2025 Resale Registration Statement is effective. We are subject to customary requirements to pay liquidated damages to the May 2025 Investors in the event we do not meet certain filing and effectiveness deadlines set forth in the May 2025 RRA in an amount equal to 1% of such investor’s subscription amount, plus interest, as applicable, accruing on a daily basis until such event giving rise to the liquidated damages is cured.

Titan Partners Group LLC, a division of American Capital Partners, LLC (“Titan”), acted as placement agent for the May 2025 Private Placement under a placement agency agreement with us, pursuant to which it received a cash fee equal to 5.0% of the gross proceeds received by us in the May 2025 Private Placement, and reimbursement of $150,000 in legal expenses.

Selling Stockholder Table

The Selling Stockholder Shares being offered by the Selling Stockholders are those previously issued to the Selling Stockholders in the May 2025 Private Placement. We are registering the Selling Stockholder Shares in order to permit the Selling Stockholders to offer the Selling Stockholder Shares for resale from time to time. Except for the ownership of the Selling Stockholder Shares, the Selling Stockholders have not had any material relationship with us within the past three years.

The table below lists the Selling Stockholders and other information regarding the beneficial ownership of the shares of our common stock by each of the Selling Stockholders. The second column lists the number of shares of our common stock beneficially owned by each Selling Stockholder, based on its ownership of the shares of common stock as of the date of this prospectus.

The third column lists the Selling Stockholder Shares being offered by this prospectus by the Selling Stockholders.

In accordance with the terms of a registration rights agreement with the Selling Stockholders, this prospectus generally covers the resale of the number of shares of common stock issued to the Selling Stockholders in the May 2025 Private Placement as described above.

The fourth column assumes the sale of all Selling Stockholder Shares offered by the Selling Stockholders pursuant to this prospectus.

The Selling Stockholders may sell all, some or none of their Selling Stockholder Shares. See “Plan of Distribution.”

PLAN OF DISTRIBUTION

Each Selling Stockholder listed below and any of their pledgees, assignees and successors-in-interest may, from time to time, sell any or all of their securities covered hereby on the principal trading market or any other stock exchange, market or trading facility on which the securities are traded or in private transactions. These sales may be at fixed or negotiated prices. A Selling Stockholder may use any one or more of the following methods when selling securities:

The Selling Stockholders may also sell securities under Rule 144 or any other exemption from registration under the Securities Act, if available, rather than under this prospectus.

Broker-dealers engaged by the Selling Stockholders may arrange for other brokers-dealers to participate in sales. Broker-dealers may receive commissions or discounts from the Selling Stockholders (or, if any broker-dealer acts as agent for the purchaser of securities, from the purchaser) in amounts to be negotiated, but, except as set forth in a supplement to this prospectus, in the case of an agency transaction not in excess of a customary brokerage commission in compliance with FINRA Rule 2121; and in the case of a principal transaction a markup or markdown in compliance with FINRA Rule 2121.

In connection with the sale of the securities or interests therein, the Selling Stockholders may enter into hedging transactions with broker-dealers or other financial institutions, which may in turn engage in short sales of the securities in the course of hedging the positions they assume. The Selling Stockholders may also sell securities short and deliver these securities to close out their short positions, or loan or pledge the securities to broker-dealers that in turn may sell these securities. The Selling Stockholders may also enter into option or other transactions with broker-dealers or other financial institutions or create one or more derivative securities which require the delivery to such broker-dealer or other financial institution of securities offered by this prospectus, which securities such broker-dealer or other financial institution may resell pursuant to this prospectus (as supplemented or amended to reflect such transaction).

The Selling Stockholders and any broker-dealers or agents that are involved in selling the securities may be deemed to be “underwriters” within the meaning of the Securities Act in connection with such sales. In such event, any commissions received by such broker-dealers or agents and any profit on the resale of the securities purchased by them may be deemed to be underwriting commissions or discounts under the Securities Act. Each Selling Stockholder has informed us that it does not have any written or oral agreement or understanding, directly or indirectly, with any person to distribute the securities.

We are required to pay certain fees and expenses incurred by us incident to the registration of the Selling Stockholder Shares. We have agreed to indemnify the Selling Stockholders against certain losses, claims, damages and liabilities, including liabilities under the Securities Act.

We have agreed to keep this prospectus effective until the earlier of (i) the date on which the securities may be resold by the Selling Stockholders without registration and without regard to any volume or manner-of-sale limitations by reason of Rule 144, without the requirement for us to be in compliance with the current public information under Rule 144 under the Securities Act or any other rule of similar effect or (ii) all of the securities have been sold pursuant to this prospectus or Rule 144 under the Securities Act or any other rule of similar effect. The Selling Stockholder Shares will be sold only through registered or licensed brokers or dealers if required under applicable state securities laws. In addition, in certain states, the resale securities covered hereby may not be sold unless they have been registered or qualified for sale in the applicable state or an exemption from the registration or qualification requirement is available and is complied with.

Under applicable rules and regulations under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), any person engaged in the distribution of the Selling Stockholder Shares may not simultaneously engage in market making activities with respect to our common stock for the applicable restricted period, as defined in Regulation M, prior to the commencement of the distribution. In addition, the Selling Stockholders will be subject to applicable provisions of the Exchange Act and the rules and regulations thereunder, including Regulation M, which may limit the timing of purchases and sales of our common stock by the Selling Stockholders or any other person. We will make copies of this prospectus available to the Selling Stockholders and have informed them of the need to deliver a copy of this prospectus to each purchaser at or prior to the time of the sale (including by compliance with Rule 172 under the Securities Act).

DESCRIPTION OF SECURITIES TO BE REGISTERED

Below is a description of the general terms of our capital stock to be registered hereunder. The following description is not complete and may not contain all the information you should consider before investing in our capital stock. For a more detailed description of our capital stock, you should read the applicable provisions of Nevada law and our articles of incorporation and certificate of amendment to our articles of incorporation (collectively, referred to herein as our “charter”), and our amended and restated bylaws, as amended from time to time (referred to herein as our “bylaws”).

The aggregate number of shares that we are authorized to issue is 300,000,000, consisting of 275,000,000 shares of common stock, par value $0.0001 per share, and 25,000,000 shares of preferred stock, par value $0.0001 per share. As of June 6, 2025, there were 41,474,148 shares of common stock outstanding  and there was no preferred stock outstanding.

The following summary of the capital stock and our charter and bylaws does not purport to be complete and is qualified in its entirety by reference to the provisions of applicable law and our charter and bylaws, as amended, which are filed as exhibits to the registration statement of which this prospectus is a part.

Common Stock

Voting Rights. Holders of shares of common stock are entitled to one vote per share held of record on all matters to be voted upon by the stockholders. Holders of shares of common stock have no cumulative voting rights.

Quorum. Our bylaws provide that the holders of not less than one third (33 1/3 percent) of the outstanding shares of common stock entitled to vote constitutes a quorum. In the absence of a quorum, any meeting of stockholders may be adjourned, from time to time, either by the chairman of the meeting or by vote of the holders of a majority of the shares represented thereat, but no other business shall be transacted at such meeting. Where a separate vote by a class or classes or series is required, except where otherwise provided by the statute or by the charter or the bylaws, as amended, one-third (33 1/3 percent) of the outstanding shares of such class or classes or series, present in person or represented by proxy, shall constitute a quorum entitled to take action with respect to that vote on that matter and, except where otherwise provided by the statute or by the charter or the bylaws, as amended, the affirmative vote of the majority (plurality, in the case of the election of directors) of the votes cast, including abstentions, by the holders of shares of such class or classes or series shall be the act of such class or classes or series.

Dividend Rights. Holders of shares of common stock are entitled to ratably receive dividends when and if declared by the board of directors out of funds legally available for that purpose, subject to the provisions of our charter and bylaws, any statutory or contractual restrictions on the payment of dividends, and any prior rights and preferences that may be applicable to any outstanding preferred stock.

Liquidation Rights. Upon liquidation, dissolution, distribution of assets or other winding up, the holders of common stock are entitled to receive ratably the assets available for distribution to the stockholders after payment of liabilities and the liquidation preference of any of our outstanding shares of preferred stock.

Other Matters. The shares of common stock have no preemptive or preferential right to acquire any of our shares or securities, including shares or securities held in our treasury. All outstanding shares of our common stock are fully paid and non-assessable.

Nevada Anti-Takeover Provisions

Nevada law, NRS Sections 78.411 through 78.444, regulate business combinations with interested stockholders. Nevada law defines an interested stockholder as a beneficial owner (directly or indirectly) of 10% or more of the voting power of the outstanding shares of the corporation. Pursuant to Sections NRS 78.411 through 78.444, combinations with an interested stockholder remain prohibited for three years after the person became an interested stockholder unless (i) the transaction is approved by the board of directors or the holders of a majority of the outstanding shares not beneficially owned by the interested party, or (ii) the interested stockholder satisfies certain fair value requirements. NRS 78.434 permits a Nevada corporation to opt-out of the statute with appropriate provisions in its articles of incorporation.

NRS Sections 78.378 through 78.3793 regulates the acquisition of a controlling interest in an issuing corporation. An issuing corporation is defined as a Nevada corporation with 200 or more stockholders of record, of which at least 100 stockholders have addresses of record in Nevada and does business in Nevada directly or through an affiliated corporation. NRS Section 78.379 provides that an acquiring person and those acting in association with an acquiring person obtain only such voting rights in the control shares as are conferred by a resolution of the stockholders of the corporation, approved at a special or annual meeting of the stockholders. Stockholders who vote against the voting rights have dissenters’ rights in the event that the stockholders approve voting rights. NRS Section 378 provides that a Nevada corporation’s articles of incorporation or bylaws may provide that these sections do not apply to the corporation. We have not opted out of these sections in our charter and bylaws.

Removal of Directors; Vacancies

Under NRS 78.335, one or more of the incumbent directors may be removed from office by the vote of stockholders representing two-thirds or more of the voting power of the issued and outstanding stock entitled to vote. Our bylaws provide that any newly created position on the board of directors that results from an increase in the total number of directors and any vacancies on the board of directors will be filled only by the affirmative vote of a majority of the remaining directors, even if less than a quorum.

No Cumulative Voting

The NRS does not permit stockholders to cumulate their votes other than in the election of directors, and then only if expressly authorized by the corporation’s articles of incorporation. Our charter does not expressly authorize cumulative voting.

The combination of these provisions will make it more difficult for our existing stockholders to replace our board of directors as well as for another party to obtain control of us by replacing our board of directors. Because our board of directors has the power to retain and discharge our officers, these provisions could also make it more difficult for existing stockholders or another party to effect a change in management. In addition, the authorization of undesignated preferred stock makes it possible for our board of directors to issue preferred stock with voting or other rights or preferences that could impede the success of any attempt to change our control.

These provisions are intended to enhance the likelihood of continued stability in the composition of our board of directors and its policies and to discourage coercive takeover practices and inadequate takeover bids. These provisions are also designed to reduce our vulnerability to hostile takeovers and to discourage certain tactics that may be used in proxy fights. However, such provisions could have the effect of discouraging others from making tender offers for our shares and may have the effect of delaying changes in our control or management. As a consequence, these provisions may also inhibit fluctuations in the market price of our stock that could result from actual or rumored takeover attempts. We believe that the benefits of these provisions, including increased protection of our potential ability to negotiate with the proponent of an unfriendly or unsolicited proposal to acquire or restructure our company, outweigh the disadvantages of discouraging takeover proposals, because negotiation of takeover proposals could result in an improvement of their terms.

Articles of Incorporation and Bylaw Provisions, As Amended

Our purpose is to engage in any lawful act or activity for which corporations may now or hereafter be organized under NRS Section 78 other than the business of a trust company, savings and loan association, thrift company or corporation organized for the purpose of conducting a banking business.

Board of Directors

Our bylaws provides that the number of directors will be fixed by the board of directors within a range of between one and fifteen directors. The directors need not be stockholders unless so required by our articles of incorporation. The minimum or maximum number may be increased or decreased from time to time only by an amendment to the bylaws, which power belongs exclusively to our board of directors.

Requirements for Advance Notification of Director Nominations and Stockholder Proposals

Our bylaws establish advance notice procedures with respect to stockholder proposals and the nomination of candidates for election as directors. In order for any matter to be properly brought before a meeting of our stockholders, the stockholder submitting the proposal or nomination will have to comply with advance notice requirements and provide us with certain information.

For business to be properly brought before an annual meeting, the proposing stockholder must have given written notice of the nomination or proposal, either by personal delivery or by United States mail to the Secretary of our company not later than the close of business on the sixtieth (60th) day nor earlier than the close of business on the ninetieth (90th) day prior to the first anniversary of the preceding year’s annual meeting; provided, however, that in the event that no annual meeting was held in the previous year or the date of the annual meeting has been changed by more than thirty (30) days from the date contemplated at the time of the previous year’s proxy statement, notice by the stockholder to be timely must be so received not earlier than the close of business on the ninetieth (90th) day prior to such annual meeting and not later than the close of business on the later of the sixtieth (60th) day prior to such annual meeting or, in the event public announcement of the date of such annual meeting is first made by our company fewer than seventy (70) days prior to the date of such annual meeting, the close of business on the tenth (10th) day following the day on which public announcement of the date of such meeting is first made by the Corporation. No business shall be conducted at any annual meeting except in accordance with the procedures set forth in our bylaws.

For business to be properly brought before a special meeting of stockholders, the notice of the meeting must set forth the general nature of the business to be considered. No business may be transacted at such special meeting otherwise than specified in such notice. The special meeting may be called for by (i) the Chairman of the board of directors, or (ii) the board of directors pursuant to a resolution adopted by a majority of the total number of authorized directors (whether or not there exist any vacancies in previously authorized directorships at the time any such resolution is presented to the board of directors for adoption), and shall be held at such place, on such date, and at such time as the Board of Directors, shall determine. The board of directors shall determine the time and place of such special meeting, which shall be held not less than thirty-thirty (30) nor more than one hundred twenty (120) days after the date of the receipt of the request.

Authorized but Unissued Capital Stock

Neither Nevada law nor our governing documents require stockholder approval for any issuance of authorized shares, except as provided in NRS 78.2055 with respect to a decrease in the number of issued and outstanding shares of a class or series without a corresponding decrease in the authorized shares. Our authorized but unissued common stock are therefore available for future issuances without stockholder approval and could be utilized for a variety of corporate purposes, including future offerings to raise additional capital, acquisitions and employee benefit plans. The existence of authorized but unissued and unreserved common stock could render more difficult or discourage an attempt to obtain control of us by means of a proxy contest, tender offer, merger or otherwise.

Stockholder Action by Written Consent

Any action required or permitted by the NRS to be taken at a meeting of stockholders may be taken without a meeting if, before or after the action, a written consent to the action is signed by stockholders holding a majority of the voting power of our company or, if different, the proportion of voting power required to take the action at a meeting of stockholders.

LEGAL MATTERS

The validity of the issuance of the securities offered by us in this offering will be passed upon for us by Parsons Behle & Latimer, Reno, Nevada.

EXPERTS

WithumSmith+Brown, PC (or Withum), our independent registered public accounting firm, has audited our consolidated balance sheets as of September 30, 2024 and 2023, and the related consolidated statements of operations, changes in stockholders’ equity and cash flows for the years ended September 30, 2024 and 2023, as set forth in their report dated December 30, 2024 included in our 2024 Annual Report, which was incorporated by reference into this prospectus of which this registration statement form a part. We have included our consolidated financial statements in this prospectus and in the registration statement in reliance on Withum’ s report given on their authority as experts in accounting and auditing.

WHERE YOU CAN FIND ADDITIONAL INFORMATION

We have filed with the SEC a registration statement on Form S-S under the Securities Act with respect to the Selling Stockholder Shares offered hereby. This prospectus, which constitutes a part of the registration statement, does not contain all of the information set forth in the registration statement or the exhibits filed therewith. For further information about us and the Selling Stockholder Shares offered hereby, reference is made to the registration statement and the exhibits filed therewith. Statements contained in this prospectus concerning the contents of any contract or any other document are not necessarily complete, please see the copy of the contract or document that has been filed for the complete contents of that contract or document. Each statement in this prospectus relating to a contract or document filed as an exhibit is qualified in all respects by the filed exhibit. The exhibits to the registration statement should be reviewed for the complete contents of these contracts and documents.

We are subject to file periodic reports, proxy statements and other information with the SEC pursuant to the Exchange Act. The SEC maintains a website that contains reports, proxy and information statements and other information regarding registrants that file electronically with the SEC. The address of the website is www.sec.gov.

We also maintain a website at www.nanonuclearenergy.com. You may access these materials at our website free of charge as soon as reasonably practicable after they are electronically filed with, or furnished to, the SEC. Information contained in, or that can be accessed through, our website is not a part of, and is not incorporated into, this prospectus.

INCORPORATION OF DOCUMENTS BY REFERENCE

The SEC allows us to “incorporate by reference” the information we file with them. This means that we can disclose important information to you by referring you to those documents instead of having to repeat the information in this document. The information incorporated by reference is considered to be part of this prospectus, and later information that we file with the SEC will automatically update and supersede this information. We incorporate by reference the documents listed below and any future filings made with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act prior to the termination of this offering by means of this prospectus, from their respective filing dates (other than any portions thereof, which under the Exchange Act, and applicable SEC rules, are not deemed “filed” under the Exchange Act). Such information will automatically update and supersede the information contained in this prospectus and the documents listed below:

All documents subsequently filed by the registrant pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, prior to the termination of the offering shall be deemed to be incorporated by reference into the prospectus. Any statement contained herein or in a document incorporated or deemed to be incorporated herein by reference shall be deemed to be modified or superseded for purposes of this prospectus to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be incorporated herein by reference modifies or supersedes such statement.

The information relating to us contained in this prospectus does not purport to be comprehensive and should be read together with the information contained in the documents incorporated or deemed to be incorporated by reference in this prospectus.

As you read the above documents, you may find inconsistencies in information from one document to another. If you find inconsistencies between the documents and this prospectus, you should rely on the statements made in the most recent document. All information appearing in this prospectus is qualified in its entirety by the information and financial statements, including the notes thereto, contained in the documents incorporated by reference herein.

We will provide to each person, including any beneficial owner, to whom this prospectus is delivered, a copy of these filings, at no cost, upon written or oral request to us at the following address:

Nano Nuclear Energy Inc.

10 Times Square, 30th Floor

New York, New York 10018

Tel: (212) 634-9206

Email: [email protected]

You also may access the incorporated reports and other documents referenced above on our website at www.nanonuclearenergy.com. The information contained on, or that can be accessed through, our website is not part of this prospectus. You may access our annual reports on Form 10-K, current reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act with the SEC free of charge at our website as soon as reasonably practicable after such material is electronically filed with, or furnished to, the SEC.

You should rely only on the information contained or incorporated by reference in this prospectus. We have not authorized any other person to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. The Selling Stockholders are not soliciting offers to buy these securities in any jurisdiction where the offer or sale is not permitted. You should assume that the information appearing in this prospectus is accurate only as of the date on the front cover of this prospectus, or such earlier date, that is indicated in this prospectus. Our business, financial condition, results of operations, and prospects may have changed since that date.

You should rely only on the information contained in this document. We have not authorized anyone to provide you with information that is different. This document may only be used where it is legal to sell these securities. The information in this document may only be accurate on the date of this document.

Additional risks and uncertainties not presently known may also impair our business operations. The risks and uncertainties described in this document and other risks and uncertainties which we may face in the future will have a greater impact on those who purchase our common stock. These purchasers will purchase our common stock at the market price or at a privately negotiated price and will run the risk of losing their entire investment.

Up to 3,888,889 Shares of Common Stock

By the Selling Stockholders

NANO NUCLEAR ENERGY INC.

PROSPECTUS

June [  ], 2025

PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution

The following table sets forth an itemized statement of the amounts of all expenses payable by us in connection with the registration of the common stock offered hereby. With the exception of the SEC registration fee and the FINRA filing fee, the amounts set forth below are estimates.

Item 15. Indemnification of Directors and Officers

Nevada Revised Statutes (“NRS”) 78.138(7) provides that, subject to limited statutory exceptions and unless the articles of incorporation or an amendment thereto (in each case filed on or after October 1, 2003) provide for greater individual liability, a director or officer is not individually liable to a corporation or its stockholders or creditors for any damages as a result of any act or failure to act in his or her capacity as a director or officer unless it is proven that: (i) the act or failure to act constituted a breach of his or her fiduciary duties as a director or officer and (ii) the breach of those duties involved intentional misconduct, fraud or a knowing violation of law.

NRS 78.7502(1) provides that a corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation), by reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses, including attorneys’ fees, judgments, fines and amounts paid in settlement actually and reasonably incurred by the person in connection with the action, suit or proceeding if the person (i) is not liable pursuant to NRS 78.138 or (ii) acted in good faith and in a manner which he or she reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe the conduct was unlawful. NRS 78.7502(2) provides that a corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a judgment in its favor by reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against expenses, including amounts paid in settlement and attorneys’ fees actually and reasonably incurred by the person in connection with the defense or settlement of the action or suit if the person (i) is not liable pursuant to NRS 78.138 or (ii) acted in good faith and in a manner which he or she reasonably believed to be in or not opposed to the best interests of the corporation. To the extent that a director, officer, employee or agent of a corporation has been successful on the merits or otherwise in defense of any such action, suit or proceeding, or in defense of any claim, issue or matter therein, the corporation shall indemnify him or her against expenses, including attorneys’ fees, actually and reasonably incurred by him or her in connection with the defense. The termination of any action, suit or proceeding by judgment, order, settlement, conviction or upon a plea of nolo contendere or its equivalent, does not, of itself, create a presumption that the person is liable pursuant to NRS 78.138 or did not act in good faith and in a manner which he or she reasonably believed to be in or not opposed to the best interests of the corporation, or that, with respect to any criminal action or proceeding, he or she had reasonable cause to believe that the conduct was unlawful. Indemnification may not be made for any claim, issue or matter as to which such a person has been adjudged by a court of competent jurisdiction, after exhaustion of all appeals therefrom, to be liable to the corporation or for amounts paid in settlement to the corporation, unless and only to the extent that the court in which the action or suit was brought or other court of competent jurisdiction determines upon application that in view of all the circumstances of the case, the person is fairly and reasonably entitled to indemnity for such expenses as the court deems proper.

NRS 78.7502(3) provides that any discretionary indemnification pursuant to NRS 78.7502 (unless ordered by a court or advanced pursuant to NRS 78.751(2)), may be made by the corporation only as authorized in the specific case upon a determination that indemnification of the director, officer, employee, or agent is proper in the circumstances. The determination must be made (i) by the stockholders; (ii) by the board of directors by majority vote of a quorum consisting of directors who were not parties to the action, suit or proceeding; (iii) if a majority vote of a quorum consisting of directors who were not parties to the action, suit or proceeding so orders, by independent legal counsel in a written opinion; or (iv) if a quorum consisting of directors who were not parties to the action, suit or proceeding cannot be obtained, by independent legal counsel in a written opinion. NRS 78.751(2) provides that the corporation’s articles of incorporation or bylaws, or an agreement made by the corporation, may provide that the expenses of officers and directors incurred in defending a civil or criminal action, suit or proceeding must be paid by the corporation as they are incurred and in advance of the final disposition of the action, suit or proceeding, upon receipt of an undertaking by or on behalf of the director or officer to repay the amount if it is ultimately determined by a court of competent jurisdiction that the director or officer is not entitled to be indemnified by the corporation.

Under the NRS, the indemnification pursuant to NRS 78.7502 and advancement of expenses authorized in or ordered by a court pursuant to NRS 78.751:

A right to indemnification or to advancement of expenses arising under a provision of the articles of incorporation or any bylaw is not eliminated or impaired by an amendment to such provision after the occurrence of the act or omission that is the subject of the civil, criminal, administrative or investigative action, suit or proceeding for which indemnification or advancement of expenses is sought, unless the provision in effect at the time of such act or omission explicitly authorizes such elimination or impairment after such action or omission has occurred.

Our governing documents provide that to the fullest extent permitted under the NRS (including, without limitation, to the fullest extent permitted under NRS 78.7502 and 78.751(3)) and other applicable law, that we shall indemnify our directors and officers in their respective capacities as such and in any and all other capacities in which any of them serves at our request.

Item 16. Exhibits

The following is a list of exhibits filed as a part of this registration statement:

Item 17. Undertakings.

(1) The undersigned registrant hereby undertakes:

(2) The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the registrant’s annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question of whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York, State of New York, on this 9^th day of June, 2025.

KNOW ALL PERSONS BY THESE PRESENTS that each individual whose signature appears below hereby constitutes and appoints James Walker and Jay Jiang Yu, and each of them, as his or her true and lawful attorney-in-fact and agent with full power of substitution, for him or her and in his or her name, place and stead, in any and all capacities (including his or her capacity as a director and/or officer of Nano Nuclear Energy Inc.), to sign any and all amendments, including post-effective amendments, to this registration statement, and to sign any registration statement for the same offering covered by this registration statement that is to be effective upon filing pursuant to Rule 462(b) promulgated under the Securities Act of 1933 increasing the number of shares for which registration is sought, and all post-effective amendments thereto, and to file the same, with all exhibits thereto and all documents in connection therewith, making such changes in this registration statement as such attorney-in-fact and agent so acting deem appropriate, with the SEC, granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done with respect to the offering of securities contemplated by this registration statement, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his, her or their substitute or substitutes, may lawfully do or cause to be done or by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed by the following persons in the capacities and on the dates indicated.