SEC Form S-3 filed by Mainz Biomed N.V.

As filed with the Securities and Exchange Commission on June 3, 2026

Registration No. 333-      

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-3

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

Quantum Cyber N.V.

(Exact name of registrant as specified in its charter)

Quantum Cyber N.V.

1501 Belvedere Road, Suite 500

West Palm Beach, FL 33406

(561) 562-4111

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

Quantum Cyber N.V.

1501 Belvedere Road, Suite 500

West Palm Beach, FL 33406

(561) 562-4111 

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

Copies to:

Rick A. Werner, Esq.

Alla Digilova, Esq.

Haynes and Boone, LLP

30 Rockefeller Plaza, 26th Floor

New York, New York 10112

Tel. (212) 659-7300

Fax (212) 884-8234

Approximate date of commencement of 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 SECURITIES AND EXCHANGE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a), MAY DETERMINE.

The information in this prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

SUBJECT TO COMPLETION, DATED JUNE 3, 2026

PROSPECTUS

Quantum Cyber N.V.

$250,000,000

Ordinary Shares

Preferred Shares

Warrants

Subscription Rights

Units

We may offer, from time to time, in one or more offerings, ordinary shares, preferred shares, warrants, subscription rights and/or units, which we collectively refer to as the “securities”. The aggregate initial offering price of the securities that we may offer and sell under this prospectus will not exceed $250,000,000. We may offer and sell any combination of the securities described in this prospectus in different series, at times, in amounts, at prices and on terms to be determined at, or prior to, the time of each offering. This prospectus describes the general terms of these securities and the general manner in which these securities will be offered. We will provide the specific terms of these securities in supplements to this prospectus. The prospectus supplements will also describe the specific manner in which these securities will be offered and may also supplement, update or amend information contained in this prospectus. This prospectus may not be used to consummate a sale of securities unless accompanied by the applicable prospectus supplement. We may also authorize one or more free writing prospectuses to be provided to you in connection with these offerings. You should read this prospectus and any applicable prospectus supplement of free writing prospectus before you invest.

The securities covered by this prospectus may be offered through one or more underwriters, dealers and agents or directly to purchasers. The names of any underwriters, dealers or agents, if any, will be included in a supplement to this prospectus. For general information about the distribution of securities offered, please see “Plan of Distribution”.

We are a “smaller reporting company” under the federal securities laws and, as such, are subject to reduced public company reporting requirements. See “Prospectus Summary - Implications of Being a Smaller Reporting Company.” We are also an “emerging growth company” as defined in section 3(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and are therefore eligible for certain exemptions from various reporting requirements applicable to reporting companies under the Exchange Act. See “Prospectus Summary – Implications of Being an Emerging Growth Company.”

Our ordinary shares are listed on the Nasdaq Capital Market (“Nasdaq”) under the symbol “QUCY.” On June 2, 2026, the last reported sale price of our ordinary shares on Nasdaq was $2.45 per share. We recommend that you obtain current market quotations for our ordinary shares prior to making an investment decision. We will provide information in any applicable prospectus supplement regarding any listing of securities other than our ordinary shares on any securities exchange.

As of the date of this prospectus, the aggregate market value of our outstanding ordinary shares held by non-affiliates, or public float, was $78,524,586, which was calculated based on 22,767,254 ordinary shares outstanding, of which 22,057,468 shares were held by non-affiliates, and the last reported sale price of our ordinary shares of $3.56 per share on May 21, 2026.

You should carefully read this prospectus, any prospectus supplement relating to any specific offering of securities, and all information incorporated by reference herein and therein.

Investing in our securities involves a high degree of risk. See “Risk Factors” beginning on page 4 of this prospectus and any similar section included in any accompanying prospectus supplement and in the documents incorporated by reference in this prospectus for a discussion of the factors you should carefully consider before deciding to purchase these securities.

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         , 2026.

TABLE OF CONTENTS 

ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement on Form S-3 that we filed with the Securities and Exchange Commission using a “shelf” registration process. Under this shelf registration process, we may, from time to time, sell any combination of the securities described in this prospectus in one or more offerings up to a total amount of $250,000,000.

This prospectus provides you with a general description of the securities we may offer. Each time we sell securities, we will provide a prospectus supplement that will contain specific information about the terms of that offering. We may also add, update or change in a prospectus supplement any information contained in this prospectus. To the extent any statement made in a prospectus supplement or a document incorporated by reference herein after the date hereof is inconsistent with the statements made in this prospectus, the statements made in this prospectus will be deemed modified or superseded by those made in the prospectus supplement or the incorporated document.

The prospectus supplement to be attached to the front of this prospectus may describe, as applicable: the terms of the securities offered; the public offering price; the price paid for the securities; net proceeds; and the other specific terms related to the offering of the securities.

You should only rely on the information contained or incorporated by reference in this prospectus and any prospectus supplement or issuer free writing prospectus relating to a particular offering. No person has been authorized to give any information or make any representations in connection with this offering other than those contained or incorporated by reference in this prospectus, any accompanying prospectus supplement and any related issuer free writing prospectus in connection with the offering described herein and therein, and, if given or made, such information or representations must not be relied upon as having been authorized by us. Neither this prospectus nor any prospectus supplement nor any related issuer free writing prospectus shall constitute an offer to sell or a solicitation of an offer to buy offered securities in any jurisdiction in which it is unlawful for such person to make such an offering or solicitation. This prospectus does not contain all of the information included in the registration statement. For a more complete understanding of the offering of the securities, you should refer to the registration statement, including its exhibits.

You should read the entire prospectus and any prospectus supplement and any related issuer free writing prospectus, as well as the documents incorporated by reference into this prospectus or any prospectus supplement or any related issuer free writing prospectus, before making an investment decision. Neither the delivery of this prospectus or any prospectus supplement or any issuer free writing prospectus nor any sale made hereunder shall under any circumstances imply that the information contained or incorporated by reference herein or in any prospectus supplement or issuer free writing prospectus is correct as of any date subsequent to the date hereof or of such prospectus supplement or issuer free writing prospectus, as applicable. You should assume that the information appearing in this prospectus, any prospectus supplement or any document incorporated by reference is accurate only as of the date of the applicable documents, regardless of the time of delivery of this prospectus or any sale of securities. Our business, financial condition, results of operations and prospects may have changed since that date.

RISK FACTORS

An investment in our securities involves a high degree of risk. The prospectus supplement applicable to each offering of our securities will contain a discussion of the risks applicable to an investment in our securities. Before deciding whether to invest in our securities, you should carefully consider the specific factors discussed under the heading “Risk Factors” in the applicable prospectus supplement, together with all of the other information contained or incorporated by reference in the prospectus supplement or appearing or incorporated by reference in this prospectus.

You should also consider the risks, uncertainties and assumptions discussed under Part I, Item 1A, “Risk Factors,” in our most recent Annual Report on Form 10-K for the year ended December 31, 2025, and in our Current Report on Form 8-K filed on May 26, 2026, and any updates in our Quarterly Reports on Form 10-Q or any updates in our Current Report on Form 8-K, which are incorporated herein by reference, as updated or superseded by the risks and uncertainties described under similar headings in the other documents that are filed after the date hereof and incorporated by reference into this prospectus and any prospectus supplement related to a particular offering. The risks and uncertainties we have described are not the only ones we face. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also affect our operations. Past financial performance may not be a reliable indicator of future performance, and historical trends should not be used to anticipate results or trends in future periods. If any of these risks actually occurs, our business, business prospects, financial condition or results of operations could be seriously harmed. This could cause the trading price of our ordinary shares to decline, resulting in a loss of all or part of your investment. Please also read carefully the section below entitled “Special Note Regarding Forward-Looking Statements.”

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus contains forward-looking statements. We intend such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Exchange Act. All statements other than statements of historical facts contained in this prospectus, including, without limitation, statements regarding our future results of operations and financial position, business strategy, transformation, strategic priorities and future progress, are forward-looking statements. These 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.

In some cases, you can identify forward-looking statements by terms such as “may,” “will,” “should,” “expect,” “plan,” “anticipate,” “could,” “intend,” “project,” “believe,” “estimate” or “predict” “or the negative of these terms or other similar expressions. The forward-looking statements in this prospectus are only predictions. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our business, financial condition and results of operations. These forward-looking statements speak only as of the date of this prospectus and are subject to a number of important factors that could cause actual results to differ materially from those in the forward-looking statements, including the factors described in the sections entitled “Risk Factors” and in our periodic filings with the SEC. Because forward-looking statements are inherently subject to risks and uncertainties, you should not rely on these forward-looking statements as predictions of future events. Except as required by applicable law, we do not plan to publicly update or revise any forward-looking statements contained herein, whether as a result of any new information, future events, changed circumstances or otherwise.

USE OF PROCEEDS

Unless we otherwise indicate in a prospectus supplement, we currently intend to use the net proceeds from the sale of our securities for general corporate purposes, which may include, among other things, working capital and/or capital expenditures.

More detailed information regarding the use of proceeds from the sale of securities, including any determinable milestones at the applicable time, will be described in any applicable prospectus supplement. We may also, from time to time, issue securities otherwise than pursuant to a prospectus supplement to this prospectus.

DESCRIPTION OF CAPITAL STOCK

The following description of our articles of association, as lastly amended by our Deed of Amendment on April 22, 2026, is intended as a summary only and does not constitute legal advice regarding those matters and should not be regarded as such. The description is qualified in its entirety by reference to the complete text of the articles of association.

Overview

We are a public company under Dutch law. We were incorporated on March 8, 2021, as a private limited liability company (besloten vennootschap met beperkte aansprakelijkheid) under Dutch law, and were formed to acquire PharmGenomics GmbH (“PharmGenomics”), a German company with limited liability. We acquired PharmGenomics on September 20, 2021. On November 9, 2021, we converted into a Dutch public company with limited liability (naamloze vennootschap). On 22 April 2026, we changed our name from “Mainz Biomed N.V.” to “Quantum Cyber N.V.” We operate through our U.S. subsidiary, Quantum Drones Corporation, which was incorporated in the State of Nevada in May 2026, and maintain our principal executive offices in West Palm Beach, Florida.

We are registered in the Commercial Register of the Chamber of Commerce (Kamer van Koophandel) in the Netherlands under number 82122571. We have our corporate seat is in Amsterdam, the Netherlands and our registered office is at 1501 Belvedere Road, Suite 500, West Palm Beach, Florida 33406.

Our ordinary shares are subject to, and have been created under, Dutch law. Set forth below is a summary of relevant information concerning the material provisions of our articles of association and applicable Dutch law.

Board of Directors

We have a one-tier board structure. The board of directors of the Company (the “Board of Directors”) consists of one executive director and three non-executive directors. The Board of Directors shall consist of such number of executive Directors as the Board of Directors may determine.

The Board of Directors will be charged with the management of the company. In fulfilling their duties, our directors will serve the interest of the company and the business connected with it. The executive directors and the executive committee are charged with the day-to-day management of the company. Supervision of the fulfilment of duties by the executive directors and of the general course of the company’s affairs and the business connected with it will primarily be carried out by the non-executive directors. The executive directors must in due time provide the non-executive directors with the information they need to carry out their duties.

Our directors will be elected by the general meeting upon a binding nomination. The Board of Directors will be authorized to nominate one or more director candidates for appointment at the general meeting. The general meeting may at all times overrule the binding nature of each nomination by a resolution adopted by a majority of at least two thirds of the votes cast, representing more than half of the issued share capital.

The general meeting may at any time suspend and dismiss a non-executive director or executive director. The general meeting may only adopt a resolution to suspend or dismiss a non-executive director or executive director by a majority of at least two thirds of the votes cast, representing more than half of the issued share capital, unless the resolution is adopted on the basis of a proposal of the Board of Directors. 

Our authorized share capital consists of 67,500,000 ordinary shares with a nominal value of EUR 0.01 per share and 7,500,000 preferred shares with a nominal value of EUR 0.01 per share. The preferred shares are divided into five series of 1,500,000. The articles of association contain transitional provisions as a result whereof the authorized share capital automatically increases if certain thresholds are exceeded to 900,000,000 ordinary shares with a nominal value of EUR 0.01 per share and 100,000,000 preferred shares with a nominal value of EUR 0.01 per share whereby the preferred shares will be divided into five series, each consisting of 20,000,000 preferred shares.

The number of ordinary shares included in the authorized share capital may be decreased and the number of preferred shares included in the authorized share capital may be increased pursuant to a resolution of the Board of Directors by a number not exceeding the number of ordinary shares included in the authorized share capital which have not been issued and which are not subject to any rights to subscribe for ordinary shares.

Issuance of Shares

Under Dutch law, shares are issued and rights to subscribe for shares are granted pursuant to a resolution of our general meeting. Our articles of association provide that the general meeting may only resolve to issue shares upon the proposal of our Board of Directors. The general meeting may authorize the Board of Directors to issue new ordinary shares or grant rights to subscribe for ordinary shares. The authorization can be granted and extended, in each case for a period not exceeding five years. For as long as, and to the extent, that such authorization is effective, our general meeting will not have the power to issue ordinary shares.

A resolution of the general meeting has irrevocably authorized our Board of Directors until November 9, 2026, to issue ordinary shares and preferred shares up to the amount of the authorized share capital (from time to time).

Pre-emptive Rights

Subject to restrictions in our articles of association, holders of ordinary shares have pre-emptive rights in relation to newly issued ordinary shares under Dutch law.

Under our articles of association, the pre-emptive rights in respect of newly issued ordinary shares may be restricted or excluded by a resolution of our general meeting, which resolution requires a two-thirds majority of the votes cast if less than half of the issued share capital is present or represented at the meeting. The general meeting may authorize our Board of Directors to limit or exclude the pre-emptive rights in respect of newly issued ordinary shares. Such authorization for our Board of Directors can be granted and extended, in each case for a period not exceeding five years.

A resolution of the general meeting has authorized our Board of Directors until November 9, 2026, to limit or exclude pre-emptive rights on ordinary shares.

Pre-emptive rights do not exist with respect (a) to the issue of ordinary shares or grant of rights to subscribe for ordinary shares to our employees or a “group” company of ours, (b) the issue of ordinary shares against a contribution other than cash, and (c) preferred shares to be issued. A holder of preferred shares has no pre-emptive right to acquire newly issued ordinary shares. 

Transfer of Ordinary Shares

Under Dutch law, transfers of ordinary shares (other than in book-entry form) require a written deed of transfer and, unless the company is a party to the deed of transfer, and acknowledgement by or proper service upon the company to be effective.

Our articles of association provide that, if one or more ordinary shares or preferred shares are admitted to trading on Nasdaq or any other regulated foreign stock exchange located in the United States the laws of the State of New York will apply to the property law aspects of the ordinary shares and preferred shares included in the part of the register of shareholders kept by the relevant transfer agent.

Form of Ordinary Shares

Pursuant to our articles of association, the ordinary shares and preferred shares are in registered form.

Purchase and Repurchase of Ordinary Shares

Under Dutch law, we may not subscribe for newly issued ordinary shares. We may acquire ordinary shares, subject to applicable provisions and restrictions of Dutch law and our articles of association, to the extent that:

Other than ordinary shares acquired for no valuable consideration or under universal title of succession (onder algemene titel) (e.g., through a merger or spin off) under statutory Dutch or other law, we may acquire ordinary shares only if our general meeting has authorized our Board of Directors to do so. An authorization by our general meeting for the acquisition of ordinary shares can be granted for a maximum period of 18 months. Such authorization must specify the number of ordinary shares that may be acquired, the manner in which these shares may be acquired and the price range within which the shares may be acquired. No authorization of our general meeting is required if ordinary shares are acquired by us on Nasdaq with the intention of transferring such ordinary shares to our employees or employees of a group company pursuant to an arrangement applicable to them. For each annual general meeting, we expect that our Board of Directors, will place on the agenda a proposal to re-authorize our Board of Directors to repurchase shares for a period of 18 months from the date of the resolution. We cannot derive any right to any distribution from ordinary shares, or voting rights attached to ordinary shares acquired by it.

A resolution of the general meeting has irrevocably authorized our Board of Directors for a period of 18 months to resolve for us to acquire fully paid-up ordinary shares up to the maximum number of ordinary shares permitted pursuant to the law and our articles of association from time to time, through privately negotiated repurchases, in self-tender offers, or through accelerated repurchase arrangements, at prices ranging from the nominal value of the ordinary shares up to one hundred and ten percent (110%) of the market price of ordinary shares, provided that (i) for open market or privately negotiated repurchases, the market price will be the last closing price for ordinary shares on the Nasdaq Stock Market prior to the transaction, (ii) for self-tender offers, the market price will be the volume weighted average price for the ordinary shares on Nasdaq during a period, determined by the Board of Directors, of no less than one and no more than five consecutive trading days immediately prior to the expiration of the tender offer, and (iii) for accelerated repurchase arrangements, the market price will be the volume weighted average price of the ordinary shares on Nasdaq over the term of the arrangement. The volume weighted average price for any number of trading days will be calculated as the arithmetic average of the daily volume weighted average price on those trading days. 

Pursuant to a resolution of the general meeting dated June 2, 2025, our Board of Directors is furthermore irrevocably authorized for a period of 18 months, until November 27, 2026, to resolve for us to acquire fully paid up preferred shares up to the maximum number of preferred shares permitted pursuant to the law and our articles of association from time to time and that preferred shares may be acquired through privately negotiated repurchases, in self-tender offers, or through accelerated repurchase arrangements, at prices ranging from the nominal value of the preferred shares up to the higher of (i) the amount that would be paid by us upon cancellation of such preferred shares in accordance with the relevant provisions of our articles of association and (ii) one hundred and ten percent (110%) of the market price of the ordinary shares into which the preferred shares may be converted in accordance with the applicable provisions of our articles of association, whereby the market price shall be determined in the manner as set out in our articles of association.

Preferred Shares

Issue

Under Dutch law, shares are issued and rights to subscribe for shares are granted pursuant to a resolution of our general meeting. Our articles of association provide that the general meeting may only resolve to issue shares upon the proposal of our Board of Directors. The general meeting may authorize the Board of Directors to issue new shares or grant rights to subscribe for ordinary shares. The authorization can be granted and extended, in each case for a period not exceeding five years.

Conversion

The Preferred Shares may, at the request of the holder, be converted into Ordinary Shares in accordance with the articles of association.

Voting Rights

In accordance with our articles of association, each Preferred Share irrespective of which class it concerns, confers the right on the holder thereof to cast one vote at our general meeting.

Pre-emptive rights

A holder of Preferred Shares has no pre-emptive right to acquire newly issued shares.

Dividends and Other Distributions

Under our articles of association, any profits or distributable reserves must first be applied to pay distributions on the Preferred Shares.

Capital Reduction

At a general meeting, our shareholders may resolve on the proposal of our Board of Directors to reduce our issued share capital by (i) cancelling ordinary shares and preferred shares or (ii) reducing the nominal value of the ordinary shares and preferred shares by amending our articles of association. In either case, this reduction would be subject to applicable statutory provisions. A resolution to cancel shares may only relate to (i) shares held by us or in respect of which we hold the depository receipts, or (ii) all preferred shares of a particular series. In order to be approved by our general meeting, a resolution to reduce the capital requires approval of a majority of the votes cast at a general meeting if at least half of the issued share capital is represented at such meeting or at least two thirds of the votes cast, if less than half of the issued share capital is represented at such meeting.

Reduction of the nominal value of shares without repayment shall be effected proportionally to all ordinary shares and preferred shares. The requirement of proportionality may be waived by agreement of all shareholders concerned.

A resolution that would result in a reduction of capital requires approval by a majority of the votes cast of each group of shareholders of the same class whose rights are prejudiced by the reduction. In addition, a reduction of capital involves a two-month waiting period during which creditors have the right to object to a reduction of capital under specified circumstances.

General Meeting

General meetings are held in Amsterdam, Rotterdam, The Hague, Arnhem, Utrecht, or in the municipality of Haarlemmermeer (Schiphol Airport), the Netherlands. All of our shareholders and others entitled to attend our general meetings are authorized to address the meeting and, in so far as they have such right, to vote, either in person or by proxy.

We will hold at least one general meeting each year, to be held within six months after the end of its financial year. A general meeting will also be held within three months after our Board of Directors has determined it to be likely that our equity has decreased to an amount equal to or lower than half of its paid up and called up capital, in order to discuss the measures to be taken if so required. If our Board of Directors fails to hold such general meeting in a timely manner, each shareholder and other person entitled to attend our general meeting may be authorized by the Dutch court to convene our general meeting.

Our Board of Directors may convene additional extraordinary general meetings at its discretion, subject to the notice requirements described below. Pursuant to Dutch law, one or more shareholders and/or others entitled to attend general meetings of shareholders, alone or jointly representing at least 10% of our issued share capital, may on their application be authorized by the Dutch court to convene a general meeting. The Dutch court will disallow the application if (i) the applicants have not previously requested in writing that our Board of Directors convenes a shareholders’ meeting or (ii) our Board of Directors convenes a shareholders’ meeting or (ii) our Board of Directors has not taken the necessary steps so that the shareholders’ meeting could be held within six weeks after such request. 

The general meeting is convened by a notice, which includes an agenda stating the items to be discussed and the location and time of our general meeting. For the annual general meeting the agenda will include, among other things, the adoption of our annual accounts, the appropriation of its profits or losses and proposals relating to the composition of and filling of any vacancies on Board of Directors. In addition, the agenda for a general meeting includes such additional items as determined by our Board of Directors. Pursuant to Dutch law, one or more shareholders and/or others entitled to attend general meetings of shareholders, alone or jointly representing at least 3% of the issued share capital, have the right to request the inclusion of additional items on the agenda of shareholders’ meetings. Such requests must be made in writing, and may include a proposal for a shareholder resolution, and must be received by us no later than on the 60^th day before the day the relevant shareholders’ meeting is held. Under our articles of association, certain items can only be put on the agenda as a voting item by our Board of Directors. Shareholders meeting the relevant requirements may still request the inclusion of such items on the agenda as a discussion item.

We will give notice of each general meeting by publication on its website and, to the extent required by applicable law, in a Dutch daily newspaper with national distribution, and in any other manner that we may be required to follow in order to comply with Dutch law and applicable stock exchange and SEC requirements. We will observe the statutory minimum convening notice period for a general meeting. Holders of registered shares may further be provided notice of the meeting in writing at their addresses as stated in its shareholders’ register.

Pursuant to our articles of association and Dutch law, our Board of Directors may determine a record date (registratiedatum) of 28 calendar days prior to a general meeting to establish which shareholders and others with meeting rights are entitled to attend and, if applicable, vote at our general meeting. The record date, if any, and the manner in which shareholders can register and exercise their rights will be set out in the notice of our general meeting. Our articles of association provide that a shareholder must notify us in writing of his or her intention to attend (or be represented at) our general meeting, such notice to be received by us on the date set by our Board of Directors in accordance with our articles of association and as set forth in the convening notice.

Our general meeting will be presided over by the chairman of our Board of Directors, who, nevertheless, may charge another person to preside over the meeting in his place even if he or she is present at the meeting. If the chairman of our Board of Directors is absent and he or she has not charged another person to preside over the meeting in his or her place, the directors present at the meeting will appoint one of them to be chairman. In the absence of all directors, our general meeting will appoint its chairman.

Voting Rights and Quorum

In accordance with Dutch law and our articles of association, each ordinary share, irrespective of which class it concerns, confers the right on the holder thereof to cast one vote at our general meeting. The voting rights attached to any ordinary shares held by us or our direct or indirect subsidiaries are suspended, unless the ordinary shares were encumbered with a right of usufruct or a pledge in favor of a party other than us or a direct or indirect subsidiary before such ordinary shares were acquired by us or such a subsidiary, in which case, the other party may be entitled to exercise the voting rights on the ordinary shares. We may not exercise voting rights for ordinary shares in respect of which its or a direct or indirect subsidiary has a right of usufruct or a pledge.

Voting rights may be exercised by shareholders or by a duly appointed proxy holder (the written proxy being acceptable to the chairman of our general meeting) of a shareholder, which proxy holder need not be a shareholder. The holder of a usufruct or pledge on shares will have the voting rights attached thereto if so provided for when the usufruct or pledge was created.

Under our Articles of Association, blank votes (votes where no choice has been made), abstentions and invalid votes will not be counted as votes cast. However, shares in respect of which a blank vote or invalid vote has been cast and shares in respect of which the person with meeting rights who is present or represented at the meeting has abstained from voting are counted when determining the part of the issued share capital that is present or represented at a general meeting. The chairman of our general meeting will determine the manner of voting and whether voting may take place by acclamation.

Resolutions of the shareholders are adopted at a general meeting by an absolute majority of votes cast, except where Dutch law or our articles of association provide for a special majority in relation to specified resolutions. Our Articles of Association do not provide for a quorum requirement, subject to any provision of mandatory Dutch law.

Subject to certain restrictions in our articles of association, the determination during our general meeting made by the chairman of that general meeting with regard to the results of a vote will be decisive. Our Board of Directors will keep a record of the resolutions passed at each general meeting. 

Amendment of articles of association

At a general meeting, at the proposal of our Board of Directors, our general meeting may resolve to amend the articles of association. A resolution by the shareholders to amend our articles of association requires an absolute majority of the votes cast.

Dissolution and liquidation

Our shareholders may at a general meeting, based on a proposal by our Board of Directors, by means of a resolution passed by an absolute majority of the votes cast resolve that the Company will be dissolved. In the event of dissolution of the company, the liquidation will be effected by our executive directors, under the supervision of our non-executive directors, unless our general meeting decides otherwise.

Certain Other Major Transactions

Our articles of association and Dutch law provide that resolutions of our Board of Directors concerning a material change in our identity, character or business are subject to the approval of our general meeting. Such changes include:

Dividends and Other Distributions

We may only make distributions to its shareholders if our equity exceeds the aggregate amount of the issued share capital and the reserves which must be maintained pursuant to Dutch law.

Under our articles of association, any profits or distributable reserves must first be applied to pay a distribution on the preferred shares, if outstanding. Any amount remaining out of distributable profits is added to our reserves as our Board of Directors determines. After reservation by our Board of Directors of any distributable profits, our general meeting will be authorized to declare distributions on the proposal of our Board of Directors. Our Board of Directors is permitted to declare interim dividends without the approval of the shareholders. Interim dividends may be declared as provided in our articles of association and may be distributed to the extent that the shareholders’ equity, based on interim financial statements, exceeds the paid-up and called-up share capital and the reserves that must be maintained under Dutch law or our articles of association. We may reclaim any distributions, whether interim or not interim, made in contravention of certain restrictions of Dutch law from shareholders that knew or should have known that such distribution was not permissible. In addition, on the basis of Dutch case law, if after a distribution we are not able to pay its due and collectable debts, then our shareholders or directors who at the time of the distribution knew or reasonably should have foreseen that result may be liable to its creditors.

The general meeting may determine that distributions will be made in whole or in part in the form of shares or a currency other than the Euro, provided on the proposal of the Board of Directors. We shall announce any proposal for a distribution and the date when and the place where the distribution will be payable to all shareholders by electronic means of communication with due observance of the applicable law and stock exchange rules. Claims for payment of dividends and other distributions not made within five years from the date that such dividends or distributions became payable will lapse, and any such amounts will be considered to have been forfeited to us (verjaring).

Transfer Agent, Warrant Agent and Registrar

We have appointed Transhare Corporation as the transfer agent, warrant agent, and registrar for our ordinary shares. Transhare Corporation’s telephone number and address is (303) 662-1112 and 17755 US Hwy 19 N, Clearwater, FL 33764.

DESCRIPTION OF WARRANTS

We may issue warrants for the purchase of ordinary shares or preferred shares. We may issue warrants independently or together with other securities, and the warrants may be attached to or separate from any offered securities. Each series of warrants will be issued under a separate warrant agreement to be entered into between us and the investors or a warrant agent. Any ordinary shares or preferred shares underlying warrants offered pursuant to this prospectus and an accompanying prospectus supplement are included in the ordinary shares and preferred shares, as applicable, offered thereby and are registered by the registration statement of which this prospectus is a part.

The following summary of material provisions of the warrants and warrant agreements are subject to, and qualified in their entirety by reference to, all the provisions of the warrant agreement and warrant certificate applicable to a particular series of warrants. The terms of any warrants offered under a prospectus supplement may differ from the terms described below. We urge you to read the applicable prospectus supplement and any related free writing prospectus, as well as the complete warrant agreements and warrant certificates that contain the terms of the warrants.

The particular terms of any issue of warrants will be described in the prospectus supplement relating to the issue. Those terms may include:

Holders of equity warrants will not be entitled to:

Each warrant will entitle its holder to purchase the principal amount of the number of ordinary shares or preferred shares at the exercise price set forth in, or calculable as set forth in, the applicable prospectus supplement. Unless we otherwise specify in the applicable prospectus supplement, holders of the warrants may exercise the warrants at any time up to the specified time on the expiration date that we set forth in the applicable prospectus supplement. After the close of business on the expiration date, unexercised warrants will become void.

A holder of warrant certificates may exchange them for new warrant certificates of different denominations, present them for registration of transfer and exercise them at the corporate trust office of the warrant agent or any other office indicated in the applicable prospectus supplement. Until any warrants to purchase ordinary shares or preferred shares are exercised, the holders of the warrants will not have any rights of holders of the underlying ordinary shares or preferred shares, including any rights to receive dividends or payments upon any liquidation, dissolution or winding up on the ordinary shares or preferred shares, if any.

Description of Subscription Rights

The following is a general description of the terms of the subscription rights we may issue from time to time. Particular terms of any subscription rights we offer will be described in the prospectus supplement relating to such subscription rights, and may differ from the terms described herein.

We may issue subscription rights to purchase ordinary shares or other securities offered hereby. These subscription rights may be issued independently or together with any other security offered hereby and may or may not be transferable by the stockholder receiving the subscription rights in such offering. Each series of subscription rights will be issued under a separate subscription rights agreement to be entered into between us and a bank or trust company, as rights agent. The rights agent will act solely as our agent in connection with the certificates relating to the subscription rights of the series of certificates and will not assume any obligation or relationship of agency or trust for or with any holders of subscription rights certificates or beneficial owners of subscription rights. In connection with any offering of subscription rights, we may enter into a standby arrangement with one or more underwriters or other purchasers pursuant to which the underwriters or other purchasers may be required to purchase any securities remaining unsubscribed for after such offering.

The applicable prospectus supplement will describe the specific terms of any offering of subscription rights for which this prospectus is being delivered, including the following:

The description in the applicable prospectus supplement of any subscription rights we offer will not necessarily be complete and will be qualified in its entirety by reference to the applicable subscription rights certificate or subscription rights agreement, which will be filed with the SEC if we offer subscription rights.

Each subscription right will entitle the holder thereof to purchase for cash the principal amount of ordinary shares or other securities at the exercise price provided in the applicable prospectus supplement. Subscription rights may be exercised at any time up to the close of business on the expiration date for the subscription rights provided in the applicable prospectus supplement.

Holders may exercise subscription rights as described in the applicable prospectus supplement. Upon receipt of payment and the subscription rights certificate properly completed and duly executed at the corporate trust office of the rights agent or any other office indicated in the prospectus supplement, we will, as soon as practicable, forward the ordinary shares or other securities, as applicable, purchasable upon exercise of the subscription rights. If less than all of the subscription rights issued in any subscription rights offering are exercised, we may offer any unsubscribed securities directly to persons other than stockholders, to or through agents, underwriters or dealers or through a combination of such methods, including pursuant to standby arrangements, as described in the applicable prospectus supplement.

Rights Agent

The rights agent for any subscription rights we offer will be set forth in the applicable prospectus supplement.

DESCRIPTION OF UNITS

We may issue units consisting of any combination of the other types of securities offered under this prospectus in one or more series. We may evidence each series of units by unit certificates that we will issue under a separate agreement. We may enter into unit agreements with a unit agent. Each unit agent will be a bank or trust company that we select. We will indicate the name and address of the unit agent in the applicable prospectus supplement relating to a particular series of units.

The following description, together with the additional information included in any applicable prospectus supplement, summarizes the general features of the units that we may offer under this prospectus. You should read any prospectus supplement and any free writing prospectus that we may authorize to be provided to you related to the series of units being offered, as well as the complete unit agreements that contain the terms of the units. Specific unit agreements will contain additional important terms and provisions, and we will file as an exhibit to the registration statement of which this prospectus is a part or will incorporate by reference from another report that we file with the SEC, the form of each unit agreement relating to units offered under this prospectus.

If we offer any units, certain terms of that series of units will be described in the applicable prospectus supplement, including, without limitation, the following, as applicable:

PLAN OF DISTRIBUTION

We may sell the securities offered pursuant to this prospectus from time to time in one or more transactions, including, without limitation:

The distribution of securities may be effected, from time to time, in one or more transactions, including:

The applicable prospectus supplement or free writing prospectus will describe the terms of the offering of the securities, including:

We may distribute the securities from time to time in one or more transactions at:

Only underwriters named in the prospectus supplement are underwriters of the securities offered by the prospectus supplement.

If underwriters are used in an offering, we will execute an underwriting agreement with such underwriters and will specify the name of each underwriter and the terms of the transaction (including any underwriting discounts and other terms constituting compensation of the underwriters and any dealers) in a prospectus supplement or free writing prospectus. The securities may be offered to the public either through underwriting syndicates represented by managing underwriters or directly by one or more investment banking firms or others, as designated. If an underwriting syndicate is used, the managing underwriter(s) will be specified on the cover of the prospectus supplement. If underwriters are used in the sale, the offered securities will be acquired by the underwriters for their own accounts and may be resold from time to time in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. Any public offering price and any discounts or concessions allowed or re-allowed or paid to dealers may be changed from time to time. Unless otherwise set forth in the prospectus supplement or free writing prospectus, the obligations of the underwriters to purchase the offered securities will be subject to conditions precedent, and the underwriters will be obligated to purchase all of the offered securities, if any are purchased.

We may grant to the underwriters options to purchase additional securities to cover over-allotments, if any, at the public offering price, with additional underwriting commissions or discounts, as may be set forth in a related prospectus supplement or free writing prospectus. The terms of any over-allotment option will be set forth in the prospectus supplement or free writing prospectus for those securities.

If a dealer is used in the sale of the securities, we, or an underwriter, will sell the securities to the dealer, as principal. The dealer may then resell the securities to the public at varying prices to be determined by the dealer at the time of resale. To the extent required, we will set forth in the prospectus supplement, document incorporated by reference or free writing prospectus, as applicable, the name of the dealer and the terms of the transactions.

We may sell the securities directly or through agents we designate from time to time. We will name any agent involved in the offering and sale of securities and we will describe any commissions we will pay the agent in the prospectus supplement. Unless the prospectus supplement states otherwise, any agent will act on a best-efforts basis for the period of its appointment.

We may authorize agents or underwriters to solicit offers by institutional investors to purchase securities from us at the public offering price set forth in the prospectus supplement or free writing prospectus pursuant to delayed delivery contracts providing for payment and delivery on a specified date in the future. We will describe the conditions to these contracts and the commissions we must pay for solicitation of these contracts in the prospectus supplement or free writing prospectus.

In connection with the sale of the securities, underwriters, dealers or agents may receive compensation from us or from purchasers of the securities for whom they act as agents, in the form of discounts, concessions or commissions. Underwriters may sell the securities to or through dealers, and those dealers may receive compensation in the form of discounts, concessions or commissions from the underwriters or commissions from the purchasers for whom they may act as agents. Underwriters, dealers and agents that participate in the distribution of the securities, and any institutional investors or others that purchase securities directly for the purpose of resale or distribution, may be deemed to be underwriters, and any discounts or commissions received by them from us and any profit on the resale of the ordinary shares by them may be deemed to be underwriting discounts and commissions under the Securities Act. No FINRA member firm may receive compensation in excess of that allowable under FINRA rules, including Rule 5110, in connection with the offering of the securities.

We may provide agents, underwriters and other purchasers with indemnification against particular civil liabilities, including liabilities under the Securities Act, or contribution with respect to payments that the agents, underwriters or other purchasers may make with respect to such liabilities. Agents and underwriters may engage in transactions with, or perform services for, us in the ordinary course of business.

To facilitate the public offering of a series of securities, persons participating in the offering may engage in transactions in accordance with Regulation M under the Exchange Act that stabilize, maintain, or otherwise affect the market price of the securities. This may include over-allotments or short sales of the securities, which involves the sale by persons participating in the offering of more securities than have been sold to them by us. In addition, those persons may stabilize or maintain the price of the securities by bidding for or purchasing securities in the open market or by imposing penalty bids, whereby selling concessions allowed to underwriters or dealers participating in any such offering may be reclaimed if securities sold by them are repurchased in connection with stabilization transactions. The effect of these transactions may be to stabilize or maintain the market price of the securities at a level above that which might otherwise prevail in the open market. Such transactions, if commenced, may be discontinued at any time. We make no representation or prediction as to the direction or magnitude of any effect that the transactions described above, if implemented, may have on the price of our securities.

In relation to each Member State of the European Economic Area (each, a “Relevant State”), no securities have been offered or will be offered pursuant to the offering to the public in that Relevant State, except that offers of securities may be made to the public in that Relevant State at any time under the following exemptions under the Prospectus Regulation:

provided that no such offer of securities shall require the Company or the representatives to publish a prospectus pursuant to Article 3 of the Prospectus Regulation or supplement a prospectus pursuant to Article 23 of the Prospectus Regulation. For the purpose of the above provisions, the expression “an offer to the public” in relation to any securities in any Relevant State means the communication in any form and by any means of sufficient information on the terms of the offer and the securities to be offered so as to enable an investor to decide to purchase or subscribe for any securities, and the expression “Prospectus Regulation” means Regulation (EU) 2017/1129, as amended, including any relevant delegated regulations.

MiFID II Product Governance

Any person offering, selling or recommending the securities (a “distributor”) should take into consideration the manufacturers’ target market assessment; however, a distributor subject to MiFID II (Directive 2014/65/EU) is responsible for undertaking its own target market assessment in respect of the securities (by either adopting or refining the manufacturers’ target market assessment) and determining appropriate distribution channels.

LEGAL MATTERS

Certain legal matters with respect to the United States of America and New York law with respect to the validity of certain of the offered securities will be passed upon for us by Haynes and Boone LLP, New York, New York. Certain legal matters with respect to Dutch law with respect to the validity of certain of the offered securities will be passed upon for us by CMS Derks Star Busmann NV, Amsterdam, the Netherlands. If the validity of any securities is also passed upon by counsel for the underwriters of an offering of those securities, that counsel will be named in the prospectus supplement relating to that offering.

EXPERTS  

The financial statements as of December 31, 2025, and 2024 and for the years then ended incorporated in this prospectus by reference to our Annual Report on Form 10-K for the year ended December 31, 2025, have been so incorporated in reliance on the report of Reliant CPA PC, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

WHERE YOU CAN FIND MORE INFORMATION

We are subject to the informational requirements of the Securities Exchange Act of 1934, as amended, and in accordance therewith file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission. The Securities and Exchange Commission maintains an internet website at www.sec.gov that contains periodic and current reports, proxy and information statements and other information regarding registrants that are filed electronically with the Securities and Exchange Commission.

We have filed with the Securities and Exchange Commission a registration statement under the Securities Act, relating to the offering of these securities. The registration statement, including the attached exhibits, contains additional relevant information about us and the securities. This prospectus does not contain all of the information set forth in the registration statement. You can obtain a copy of the registration statement for free at www.sec.gov. The registration statement and the documents referred to below under “Incorporation of Certain Information By Reference” are also available on our website at www.quantum-cyber.ai.

INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

The Securities and Exchange Commission allows us to “incorporate by reference” the information we have filed with it, which means that we can disclose important information to you by referring you to those documents. The information we incorporate by reference is an important part of this prospectus, and later information that we file with the Securities and Exchange Commission will automatically update and supersede this information. We incorporate by reference the documents listed below and any future documents (excluding information furnished pursuant to Items 2.02 and 7.01 of Form 8-K) we file with the Securities and Exchange Commission pursuant to Sections l3(a), l3(c), 14 or l5(d) of the Securities Exchange Act of 1934, as amended, subsequent to the date of this prospectus and prior to the termination of the offering:

All filings filed by us pursuant to the Securities Exchange Act of 1934, as amended, after the date of the initial filing of this registration statement and prior to the effectiveness of such registration statement (excluding information furnished pursuant to Items 2.02 and 7.01 of Form 8-K) shall also be deemed to be incorporated by reference into the prospectus.

You should rely only on the information incorporated by reference or provided in this prospectus. We have not authorized anyone else to provide you with different information. Any statement contained in a document incorporated by reference into this prospectus will be deemed to be modified or superseded for the purposes of this prospectus to the extent that a later statement contained in this prospectus or in any other document incorporated by reference into this prospectus modifies or supersedes the earlier statement. Any statement so modified or superseded will not be deemed, except as so modified or superseded, to constitute a part of this prospectus. You should not assume that the information in this prospectus is accurate as of any date other than the date of this prospectus or the date of the documents incorporated by reference in this prospectus.

We will provide without charge to each person to whom a copy of this prospectus is delivered, upon written or oral request, a copy of any or all of the reports or documents that have been incorporated by reference in this prospectus but not delivered with this prospectus (other than an exhibit to these filings, unless we have specifically incorporated that exhibit by reference in this prospectus). Any such request should be addressed to us at:

Quantum Cyber N.V

Attn: Secretary

1501 Belvedere Road, Suite 500

West Palm Beach, FL 33406

(561) 562-4111

You may also access the documents incorporated by reference in this prospectus through our website at www.quantum-cyber.ai. Except for the specific incorporated documents listed above, no information available on or through our website shall be deemed to be incorporated in this prospectus or the registration statement of which it forms a part.

$250,000,000

ORDINARY SHARES

PREFERRED SHARES

WARRANTS

SUBSCRIPTION RIGHTS

UNITS

PROSPECTUS

                   , 2026

PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution.

The following sets forth the anticipated expenses (all of which are to be paid by the registrant) that we may incur in connection with the securities being registered hereby. All such expenses are estimates, other than the registration fee payable to the Securities and Exchange Commission.

Item 15. Indemnification of Directors and Officers.

Under Dutch law, members of the board of directors may be liable to the registrant for damages in the event of improper or negligent performance of their duties. They may be jointly and severally liable for damages to the registrant and third parties for infringement of our Articles of Association or certain provisions of the Dutch Civil Code. In certain circumstances, they may also incur additional specific civil and criminal liabilities.

Pursuant to the registrant’s articles of association, to the fullest extent permitted by Dutch law, the following shall be reimbursed to the indemnified officers:

An indemnitee shall not be entitled to reimbursement if and to the extent that:

The description of indemnity herein is merely a summary of the provisions in the registrant’s articles of association described above, and such description shall not limit or alter the mentioned provisions in the articles of association or other indemnification agreements.

In addition, we have entered into an indemnification agreement with each of our directors and executive officers. Under these agreements, we agree to indemnify our directors and executive officers against certain liabilities and expenses incurred by such persons in connection with claims made by reason of their being a director or officer of our company.

Item 16. Exhibits.

Item 17. Undertakings.

provided, however, that paragraphs (1)(i), (1)(ii) and (1)(iii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in this registration statement or are contained in a form of prospectus filed pursuant to Rule 424(b) that is part of this registration statement.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, 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 West Palm Beach, State of Florida, on June 3, 2026.

Power of Attorney

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints each of David Lazar and William Caragol, severally, acting alone and without the other, his or her true and lawful attorney-in-fact and agent, with full powers of substitution and re-substitution, for and in his or her name, place and stead, in any and all capacities, to file and sign any and all amendments, including post-effective amendments and any registration statement for the same offering that is to be effective under Rule 462(b) of the Securities Act of 1933, as amended, to this registration statement, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitute or substitutes may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.