SUMA Acquisition Corp

As filed with the U.S. Securities and Exchange Commission on January 20, 2026.

Registration No. 333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORMS-1

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

(Exact name of registrant as specified in its charter)

177 Manning Avenue

Toronto, Ontario

M6J2K6, Canada

(647) 622-9173

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

c/o California Corporate Agents

2108 N ST #14487

Sacramento, California 95816

(647) 622-9173

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

Copies to:

Approximate date of commencement of proposed sale to the public: As soon as practicable after the effective date of this registration statement.

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 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 post-effective amendment filed pursuant to Rule 462(d) 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.☐

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 jurisdiction where the offer or sale is not permitted.

15,000,000 Units

SUMA Acquisition Corporation is a blank check company incorporated as a Cayman Islands exempted company and formed for the purpose of effecting a merger, amalgamation, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses or entities (our “initial business combination”). We have not selected any business combination target and we have not, nor has anyone on our behalf, initiated any substantive discussions, directly or indirectly, with any business combination target. We may pursue an initial business combination in any business or industry.

This is an initial public offering of our securities. Each unit has an offering price of $10.00 and consists of one Class A ordinary share and one right to receive one tenth (1/10) of a Class A ordinary share upon the consummation of an initial business combination (the “Share Rights”), as described in more detail in this prospectus. The underwriters have a 45-day option from the date of this prospectus to purchase up to an additional 2,250,000 units to cover over-allotments, if any.

We will provide our public shareholders with the opportunity to redeem, regardless of whether they abstain, vote for, or vote against, our initial business combination, all or a portion of their Class A ordinary shares that were sold as part of the units in this offering (the “public shares”), upon the completion of our initial business combination at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the trust account described below as of two business days prior to the consummation of our initial business combination, including interest earned on the funds held in the trust account (net of amounts withdrawn to pay our taxes, other than excise taxes, if any) divided by the number of then issued and outstanding public Class A ordinary shares, subject to the limitations and on the conditions described herein. See“Summary — The Offering — Redemption rights for public shareholders upon completion of our initial business combination” on page 33 and“Summary — The Offering — Redemption of public shares and distribution and liquidation if no initial business combination” on page 38 for more information.

Notwithstanding the foregoing redemption rights, if we seek shareholder approval of our initial business combination and we do not conduct redemptions in connection with our initial business combination pursuant to the tender offer rules, our amended and restated memorandum and articles of association provide that a public shareholder, together with any affiliate of such shareholder or any other person with whom such shareholder is acting in concert or as a “group” (as defined under Section 13 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)), will be restricted from redeeming its shares with respect to more than an aggregate of 15% of the shares sold in this offering without our prior consent. However, we would not be restricting our shareholders’ ability to vote all of their shares (including all shares held by those shareholders that hold more than 15% of the shares sold in this offering) for or against our initial business combination. See “Summary — The Offering — Limitation on redemption rights of shareholders holding 15% or more of the shares sold in this offering if we hold shareholder vote” on page 37 for further discussion on certain limitations on redemption rights.

Our sponsors, SUMA Sponsor LP and SUMA Canada Sponsor LP, and Seaport Global Securities LLC (“Seaport”), the representative of the underwriters, have committed, pursuant to written agreements, to purchase from us an aggregate of 412,500 private placement units (the “private placement units”) (or up to 446,250 private placement units if the underwriters’ over-allotment option is exercised in full) at $10.00 per unit for an aggregate purchase price of $4,125,000 (or up to $4,462,500 if the underwriters’ over-allotment option is exercised in full) in a private placement that will close simultaneously with the closing of this offering. Each private placement unit consists of one Class A ordinary share and one Share Right to receive one tenth (1/10) of a Class A ordinary share upon the consummation of an initial business combination (the “private placement rights”), as described in more detail in this prospectus. Of those 412,500 private placement units, our sponsors have agreed to purchase 300,000 private placement units (or up to 316,875 private placement units if the underwriters’ over-allotment option is exercised in full) and Seaport has agreed to purchase 112,500 private placement units (or up to 129,375 private placement units if the underwriters’ over-allotment option is exercised in full). The private placement units are identical to the units sold in this offering, subject to certain limited exceptions as described in this prospectus. [ ] institutional investors (none of which are affiliated with any member of our management, our sponsors, the underwriters or any other investor) (the “non-managing sponsor investors”), have expressed an interest to indirectly

purchase, through the purchase of non-managing sponsor partnership interests, an aggregate of [ ] private placement units (whether or not the underwriters’ over-allotment option is exercised in full) at a price of $10.00 per unit ($[ ] in the aggregate) in a private placement that will close simultaneously with the closing of this offering. Subject to each non-managing sponsor investor purchasing, through the sponsors, the private placement units allocated to it in connection with the closing of this offering, the sponsors will issue partnership interests at a nominal purchase price of $0.004 per underlying founder share to the non-managing sponsor investors reflecting indirect interests in an aggregate of [ ] founder shares held by the sponsors.

None of the non-managing sponsor investors have expressed to us an interest in purchasing any of the units in this offering and neither us nor the representative have had discussions with any non-managing sponsor investors regarding any purchases of units in this offering. If the non-managing sponsor investors purchase units in the offering, and depending on how many public units are purchased by the non-managing sponsor investors, the post-offering trading volume, volatility and liquidity of our securities may be reduced relative to what they would have been had the units been more widely offered and sold to other public investors. We do not expect any potential purchases of units by the non-managing sponsor investors to negatively impact our ability to meet The Nasdaq Global Market (“Nasdaq”), listing eligibility requirements. In addition, the underwriters have full discretion to allocate the units to investors and may determine to sell fewer units to the non-managing sponsor investors, or none at all, and any potential purchases of the non-managing sponsor partnership interests is not contingent upon the participation in this offering or vice versa, and in no case would any of the non-managing sponsor investors be sold more than 9.9% of the units to be sold in this offering. The underwriters will receive the same upfront discounts and commissions and deferred underwriting commissions on units purchased by the non-managing sponsor investors, if any, as it will on the other units sold to the public in this offering. In addition, none of the non-managing sponsor investors has any obligation to vote any of their public shares in favor of our initial business combination. Nevertheless, regardless of the number of units they purchase, the non-managing sponsor investors will be incentivized to vote their public shares in favor of a business combination due to their indirect ownership through the sponsors of founder shares and Class A ordinary shares and private placement rights issued as part of the private placement units. Additionally, these non-managing sponsor investors have the potential to realize enhanced economic returns from their investments compared to other investors in this offering.

Our sponsors have purchased an aggregate of 5,750,000 Class B ordinary shares (up to 750,000 of which are subject to surrender to us for no consideration depending on the extent to which the underwriters’ over-allotment option is exercised) for an aggregate purchase price of $25,000, or approximately $0.004 per share. The Class B ordinary shares will automatically convert into Class A ordinary shares concurrently with or immediately following the consummation of our initial business combination, or at any time prior thereto at the option of the holder thereof, on a one-for-one basis, subject to adjustment for share sub-divisions, share capitalizations, reorganizations, recapitalizations and the like. Because our sponsors acquired the Class B ordinary shares at a nominal price, our public shareholders will incur an immediate and substantial dilution upon the closing of this offering. Further, the Class A ordinary shares issuable in connection with the conversion of the Class B ordinary shares may result in material dilution to our public shareholders due to the anti-dilution rights of our Class B ordinary shares that may result in an issuance of Class A ordinary shares on a greater than one-to-one basis upon conversion. In the case that additional Class A ordinary shares, or equity-linked securities (as described herein), are issued or deemed issued in excess of the amounts issued in this offering and related to the closing of our initial business combination, the ratio at which the Class B ordinary shares will convert into Class A ordinary shares will be adjusted (unless the holders of a majority of the issued and outstanding Class B ordinary shares agree to waive such anti-dilution adjustment with respect to any such issuance or deemed issuance) so that the number of Class A ordinary shares issuable upon conversion of all Class B ordinary shares will equal, in the aggregate, 25% of the sum of (i) the total number of all ordinary shares issued and outstanding upon the completion of this offering (including any Class A ordinary shares issued pursuant to the underwriters’ over-allotment option and excluding the securities underlying the private placement units issued to the sponsors); plus (ii) all Class A ordinary shares and equity-linked securities issued or deemed issued in connection with our initial business combination (excluding any shares or equity-linked securities issued, or to be issued, to any seller in the initial business combination and any private placement-equivalent units issued to our sponsors or any of their affiliates or to our officers or directors upon conversion of working capital loans made to the company); minus (iii) any redemptions of Class A ordinary shares by public shareholders in connection with an initial business combination; provided that such conversion of founder shares will never occur on a less than one-for-one basis. If we increase or decrease the size of this offering, we will effect a share capitalization or a share repurchase or redemption or other appropriate mechanism, as applicable, with respect to our Class B ordinary shares immediately prior to the consummation of this offering in such amount as to maintain the ownership of founder shares by our initial shareholders, on an as-converted basis, at 25% of our issued and

outstanding ordinary shares upon the consummation of this offering. Prior to the closing of our initial business combination, only holders of our Class B ordinary shares (a) will have the right to vote to appoint and remove directors prior to or in connection with the completion of our initial business combination and (b) will be entitled to vote on continuing our company in a jurisdiction outside the Cayman Islands (including any special resolution required to adopt new constitutional documents as a result of our approving a transfer by way of continuation in a jurisdiction outside the Cayman Islands). On any other matters submitted to a vote of our shareholders prior to or in connection with the completion of our initial business combination, holders of the Class B ordinary shares and holders of the Class A ordinary shares will vote together as a single class, except as required by law. Collectively, the sponsors’ 5,000,000 Class B ordinary shares, its 300,000 private Class A ordinary shares and the 300,000 private placement rights each to receive one tenth (1/10) of a Class A ordinary share, underlying its private placement units will represent 26.1% of all ordinary shares outstanding, assuming that the underwriters’ over-allotment option is not exercised. See “Summary — The Offering — Our Sponsors” on page 6 for further discussion on our sponsors’ and our affiliates’ securities;“Summary — The Offering — Transfer restrictions on founder shares” on page 23, “Summary — The Offering — Founder shares conversion and anti-dilution rights” on page 24, “Summary — The Offering — Appointment and removal of directors and continuing the company outside of the Cayman Islands; voting rights” on page 24, “Risk Factors — Risks Relating to our Securities — The nominal purchase price paid by our sponsors for the founder shares may result in significant dilution to the implied value of your public shares upon the consummation of our initial business combination” on page 85 and “— Risks Relating to our Securities — We may issue additional ordinary shares or preference shares to complete our initial business combination or under an employee incentive plan after completion of our initial business combination. We may also issue Class A ordinary shares upon the conversion of the Class B ordinary shares at a ratio greater than one-to-one at the time of our initial business combination as a result of the anti-dilution provisions contained in our amended and restated memorandum and articles of association. Any such issuances would dilute the interest of our shareholders and likely present other risks” on page 65.

As more fully discussed in “Management — Conflicts of Interest”on page 153, each of our officers and directors presently has, and any of them in the future may have additional, fiduciary, contractual or other obligations or duties to one or more other entities pursuant to which such officer or director is or will be required to present a business combination opportunity to such entities. The low price that our sponsors, executive officers and directors (directly or indirectly) paid for the founder shares creates an incentive whereby our officers and directors could potentially make a substantial profit even if we select an acquisition target that subsequently declines in value and is unprofitable for public shareholders. If we are unable to complete our initial business combination within the completion window the founder shares and private placement units may expire worthless, except to the extent they receive liquidating distributions from assets outside the trust account, which could create an incentive for our sponsors, executive officers and directors to complete a transaction even if we select an acquisition target that subsequently declines in value and is unprofitable for public shareholders. Further, each of our officers and directors may have a conflict of interest with respect to evaluating a particular business combination if the retention or resignation of any such officers and directors was included by a target business as a condition to any agreement with respect to our initial business combination. Additionally, commencing on the date on which our securities are listed on Nasdaq, we will pay an affiliate of our sponsors in an amount equal to $25,000 per month for office space, utilities and secretarial and administrative support made available to us, as described elsewhere in this prospectus. Upon consummation of this offering, we will repay up to $300,000 in loans made to us by our sponsors to cover offering-related and organizational expenses. In the event that following this offering we obtain working capital loans from our sponsors to finance transaction costs related to our initial business combination, up to $1,500,000 of such loans may be convertible into units of the post-business combination entity at a price of $10.00 per unit at the option of our sponsors. Additionally, our sponsors, our officers and directors or their affiliates may be paid finder’s fees, advisory fees, consulting fees or success fees in order to effectuate the completion of our initial business combination. Additionally, following consummation of a business combination, members of our management team will be entitled to reimbursement for any out-of-pocket expenses related to identifying, investigating and completing an initial business combination, and we may engage one of our sponsors or an affiliate of one of our sponsors as an advisor or otherwise in connection with our initial business combination and certain other transactions and pay such person or entity a salary or fee in an amount that constitutes a market standard for comparable transactions. As a result, there may be actual or potential material conflicts of interest between members of our management team, our sponsors and their affiliates on one hand, and purchasers in this offering on the other. See the sections titled “Prospectus Summary — Our Sponsors” on page 6 for further discussion on our sponsors’ and affiliate’s compensation; “Proposed Business — Sourcing of Potential Business Combination Targets”on page 123 and“Certain Relationships and Related Party Transactions” on page 163 for more information.

We will have 24 months from the closing of this offering to consummate an initial business combination (or 27 months from the closing of this offering if we have executed a letter of intent, agreement in principle or definitive agreement for an initial business combination within 24 months from the closing of this offering; no redemption rights shall be offered to our public shareholders in connection with any such extension from 24 months to 27 months if we have executed a letter of intent, agreement in principle or definitive agreement for an initial business combination within 24 months from the closing of this offering) or until such earlier liquidation date as our board of directors may approve, to consummate an initial business combination, which we refer to herein as the completion window. If we anticipate that we may be unable to consummate our initial business combination within such 24-month period (or up to 27 months if we extend the period of time to consummate our initial business combination in accordance with the terms described in this prospectus), we may seek shareholder approval to amend our amended and restated memorandum and articles of association to extend the date by which we must consummate our initial business combination. If we seek shareholder approval for an extension, holders of public shares will be offered an opportunity to redeem their shares at a per share price, payable in cash, equal to the aggregate amount then on deposit in the trust account, including interest earned thereon (less taxes, other than excise taxes, if any, payable), divided by the number of then issued and outstanding public shares, subject to applicable law. If we are unable to complete our initial business combination within the completion window, we will redeem 100% of the public shares at a per share price, payable in cash, equal to the aggregate amount then on deposit in the trust account, including interest earned thereon (less taxes, other than excise taxes, if any, payable and up to $100,000 of interest income to pay dissolution expenses), divided by the number of then issued and outstanding public shares, subject to applicable law and certain conditions as further described herein.

Currently, there is no public market for our units, Class A ordinary shares or Share Rights. We intend to apply to have our units listed on The Nasdaq Global Market under the symbol “SUMAU” on or promptly after the date of this prospectus. We cannot guarantee that our securities will be approved for listing on Nasdaq. We expect the Class A ordinary shares and Share Rights comprising the units to begin separate trading on the 52 nd day following the date of this prospectus unless Seaport, the representative of the underwriters, informs us of its decision to allow earlier separate trading, subject to our satisfaction of certain conditions as described further herein. Once the securities comprising the units begin separate trading, we expect that the Class A ordinary shares and Share Rights will be listed on Nasdaq under the symbols “SUMA” and “SUMAR”, respectively.

We are an “emerging growth company” and a “smaller reporting company” under applicable federal securities laws and will be subject to reduced public company reporting requirements. Investing in our securities involves a high degree of risk. See “Risk Factors”beginning on page 48 for a discussion of information that should be considered in connection with an investment in our securities. Investors will not be entitled to protections normally afforded to investors in Rule 419 blank check offerings.

Neither the U.S. Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

No offer or invitation, whether directly or indirectly, is being or may be made to the public in the Cayman Islands to subscribe for any of our securities.

(1) Includes (A) $0.15 per unit (including any units sold pursuant to the underwriters’ option to purchase additional units), or $2,250,000 in the aggregate (or up to $2,587,500 in the aggregate if the underwriters’ over-allotment option is exercised in full), payable to the underwriters upon the closing of this offering, of which (i) $0.075 per unit will be paid to the underwriters in cash, and (ii) $0.075 per unit will be used by the underwriters to purchase private placement units; and (B) $0.40 per unit on all units sold, or up to $6,000,000 in the aggregate (or up to $6,900,000 in the aggregate if the underwriters’ over-allotment option is exercised in full) payable to the underwriters for deferred underwriting commissions to be deposited into a trust account located in the United States as described herein and released to the underwriters only upon the completion of an initial business combination. See also “Underwriting” for a description of underwriting compensation payable to the underwriters.

Of the proceeds we receive from this offering and the sale of the private placement units described in this prospectus, $150.0 million, or $172.5 million if the underwriters’ overallotment option is exercised in full ($10.00 per unit in either case), will be placed into a U.S.-based trust account with Continental Stock Transfer & Trust Company acting as trustee.

Because our sponsors acquired the founder shares at a nominal price, our public shareholders will incur an immediate and material dilution upon the closing of this offering. Further, the Class A ordinary shares issuable in connection with the conversion of the founder shares may result in material dilution to our public shareholders due to the anti-dilution rights of our founder shares that may result in an issuance of Class A ordinary shares on a greater than one-for-one basis upon conversion. See the section titled “Risk Factors — Risks Relating to our Securities — The nominal purchase price paid by our sponsors for the founder shares may result in material dilution to the implied value of your public shares upon the consummation of our initial business combination, and our sponsors are likely to make a substantial profit on their investments in us in the event we consummate an initial business combination, even if the business combination causes the trading price of our ordinary shares to materially decline” on page 85.

The following table illustrates the difference between the public offering price per unit and our net tangible book value per share, as adjusted to reflect various potential redemption levels that may occur in connection with the closing of our initial business combination (“Adjusted NTBVPS”) on a pro forma basis to give effect to this offering and the issuance of the private placement units, assuming the exercise in full and no exercise of the over-allotment option. Adjusted NTBVPS excludes the effect of the consummation of our initial business combination or any related transactions or expenses. See the section titled “Dilution” on page 102 for more information.

Our sponsors and members of our management team will directly or indirectly own our securities following this offering, and accordingly, they may have a conflict of interest in determining whether a particular target business is an appropriate business with which to effectuate our initial business combination. Additionally, each of our officers and directors presently has, and any of them in the future may have additional, fiduciary, contractual or other obligations or duties to one or more other entities pursuant to which such officer or director is or will be required to present a business combination opportunity to such entities. As a result, there may be actual or potential material conflicts of interest between our sponsors and their affiliates on one hand, and purchasers in this offering on the other. See the sections titled “Summary — The Offering — Conflicts of interest” on page 40, “Proposed Business — Sourcing of Potential Business Combination Targets” on page 123 and “Management — Conflicts of Interest” on page 153 for more information.

The underwriters are offering the units for sale on a firm commitment basis. The underwriters expect to deliver the units to the purchasers on or about [ ], 2026.

Lead Book-Running Manager

Seaport Global Securities

, 2026