SEC Filing Document

Company: Berto Acquisition Corp. II
Ticker: GUAC
CIK: 2081515
Filing Type: 424B4
Document Type: 424B4
Date Filed: 2026-05-18
Accession Number: 0001829126-26-005386
Exchange: 
SIC Code: 6770
SIC Description: Blank Checks
URL: https://www.sec.gov/Archives/edgar/data/2081515/000182912626005386/bertoacquisition2_424b4.htm

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Filed pursuant to Rule 424(b)(4)

Registration No. 333-295343

PROSPECTUS

Berto Acquisition Corp. II

27,400,000 Units

Berto Acquisition Corp. II is a blank check company incorporated as a Cayman Islands exempted company whose business purpose is to effect a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses, which we refer to as our initial business combination. We will have 24 months from the closing of this offering to complete our 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) (the “completion window”). We have not selected any specific business combination target and we have not, nor has anyone on our behalf, engaged in any substantive discussions, directly or indirectly, with any business combination target with respect to an initial business combination with us. However, our founder and members of our management team had been actively in discussions with potential business combination partners in their capacity as officers and directors of Berto Acquisition Corp. (“First Berto”), Coliseum Acquisition Corp. (which consummated its initial business combination in December 2024) (“Coliseum”), dMY Squared Technology Group, Inc. (which consummated its initial business combination in March 2026) (“dMY Squared”), dMY Technology Group, Inc. VI (which liquidated in April 2023 without completing a business combination) (“dMY VI”), dMY Technology Group, Inc. IV (which consummated its initial business combination in December 2021) (“dMY IV”), dMY Technology Group, Inc. III (which consummated its initial business combination in October 2021) (“dMY III”), dMY Technology Group, Inc. II (which consummated its initial business combination in April 2021) (“dMY II”), dMY Technology Group, Inc. (which consummated its initial business combination in December 2020) (“dMY I”, and together with dMY II, dMY III, dMY IV, dMY VI, and dMY Squared, “dMY SPACs”), GTY Technology Holdings Inc. (which consummated its initial business combination in February 2019) (“GTY”), Bitcoin Infrastructure Acquisition Corp Ltd, CSLM Digital Asset Acquisition Corp III, Ltd, Invest Acquisition Corp., and Investcorp AI Acquisition Corp. (which entered into a definitive business combination agreement on April 8, 2026), and we may pursue business combination partners that had previously been in discussions with the management teams of such SPACs. Past performance by our management team, including with respect to each of the foregoing SPACs is not a guarantee of success with respect to our search for a business combination target.

This is an initial public offering of our securities. Each unit has an offering price of $10.00 per unit and consists of one ordinary share and one-third of one redeemable warrant. Each whole warrant, when exercisable, entitles the holder thereof to purchase one ordinary share at a price of $11.50 per share (the “exercise price”), subject to adjustment as described herein. Only whole warrants are exercisable. No fractional warrants will be issued upon separation of the units and only whole warrants will trade. The warrants will become exercisable 30 days after the completion of our initial business combination and will expire five years after the completion of our initial business combination or earlier upon redemption or our liquidation, as described herein. Subject to the terms and conditions described in this prospectus, we may call the warrants for redemption once the warrants become exercisable. The underwriters have a 45-day option from the date of this prospectus to purchase up to 4,110,000 additional units to cover over-allotments, if any.

Table of Contents

We will provide our public shareholders (excluding our sponsor, sponsor affiliates, directors and officers to the extent they acquire public shares) with the opportunity to redeem all or a portion of their ordinary shares that were sold as part of the units in this offering, which we refer to collectively as our 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 on the funds held in the trust account (which interest shall be net of amounts released to us to fund our working capital requirements (subject to the limitations described herein) and taxes paid or payable), divided by the number of then issued and outstanding public shares, subject to applicable law and limitations and on the conditions described herein, at the earliest of (i) the completion of our initial business combination in connection with a general meeting called to approve the initial business combination or without a shareholder vote by means of a tender offer, or (ii) the redemption of our public shares properly submitted in connection with a shareholder vote to amend our amended and restated memorandum and articles of association (“articles”), which is not for the purpose of approving, or in conjunction with the consummation of, an initial business combination, (A) to modify the substance or timing of our obligation to allow redemption in connection with our initial business combination or to redeem 100% of our public shares if we have not consummated an initial business combination within the completion window or (B) with respect to any other material provisions relating to the rights of holders of our ordinary shares or pre-initial business combination activity including any extension of the completion window. The proceeds placed in the trust account and the interest earned thereon will not be used to pay for the possible excise tax or any other similar fees or taxes that may be levied on the Company pursuant to any current, pending or future rules or laws, including without limitation any excise tax due under the Inflation Reduction Act of 2022 on any redemptions or stock buybacks by our company. As further described in this prospectus, our articles provide that a public shareholder, together with any affiliate or any other person with whom such shareholder is acting in concert or as a “group” (as defined under Section 13 of the Exchange Act of 1934, as amended), will be restricted from redeeming its public shares with respect to more than an aggregate of 15% of the public shares sold in this offering, without our prior consent. Each public shareholder may elect to redeem their public shares irrespective of whether they vote for or against an initial business combination, or whether they do not vote or abstain from voting on the initial business combination, and regardless of whether they hold public shares on the record date established in connection with our initial business combination. If we are unable to complete our initial business combination within the completion window, we will as promptly as reasonably possible but not more than ten business days thereafter, subject to lawfully available funds, 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 (which interest shall be net of amounts released to us to fund our working capital requirements (subject to the limitations described herein) and taxes paid or payable, and up to $100,000 to pay dissolution expenses), divided by the number of then issued and outstanding public shares, which redemption will constitute full and complete payment for the public shares and completely extinguish public shareholders’ rights as shareholders (including the right to receive further liquidation or other distributions, if any), subject to our obligations under Cayman Islands law to provide for claims of creditors and subject to the other requirements of applicable law.

Our sponsor, Berto Acquisition Sponsor II LLC, a Cayman Islands limited liability company formed for the purpose of investing in us, committed to purchase an aggregate of 3,500,000 private placement warrants (including if the underwriters’ over-allotment option is exercised in full), each exercisable to purchase one ordinary share at a price of $11.50 per share, at a price of $1.00 per warrant, for an aggregate purchase price of $3,500,000, in a private placement that will close simultaneously with the closing of this offering. The private placement warrants are identical to the warrants sold in this offering, subject to certain limited exceptions as described in this prospectus.