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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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 were to be included by a target business as a condition to any agreement with respect to our initial business combination. Additionally, each of our officers and directors presently has, and any of them in the future may have additional, fiduciary or contractual obligations to another entity pursuant to which such officer or director is or will be required to present a business combination opportunity to such entity. There may be actual or potential material conflicts of interest between our sponsor, its affiliates or promoters on the one hand, and the investors in this offering on the other hand. See the sections titled “Our Business Combination Process” and “Management — Conflicts of Interest.”

Our sponsor is supported by affiliates of Meteora, an investment adviser specializing in SPAC-related investments. Meteora’s principals have previous experience across the full lifecycle of SPACs, from the initial public offering to the de-SPAC business combination process. The managing member of Meteora, Vikas Mittal, serves as our Executive Chairman. Meteora will act as a consultant to the company and purchased 300,000 founder shares at a price per share of approximately $0.003 in December 2025. On May 15, 2026, the Company capitalized $69.00 standing to the credit of the Company’s share premium account, or additional paid-in capital, and issued an additional 690,000 founder shares in connection with the upsize in the prospectus amount. Meteora is expected to purchase public units from the underwriters in this offering at the $10.00 per unit offering price. Meteora is neither a broker-dealer nor affiliated with one and is not acting as an underwriter in connection with this offering. Meteora is not an affiliate of us or our sponsor.

Of the gross proceeds we receive from this offering and the sale of the private placement warrants described in this prospectus, $274,000,000, or $315,100,000 if the underwriters’ over-allotment option is exercised in full ($10.00 per unit in either case), after deducting $1,081,600 in underwriting discounts and commissions payable upon the closing of this offering and an aggregate of approximately $1,318,400 to pay fees and expenses in connection with the closing of this offering following the closing of this offering, will be deposited into a trust account located in the United States with Continental Stock Transfer & Trust Company acting as trustee and held only (i) uninvested as cash, (ii) in an interest-bearing or non-interest bearing demand deposit account at a U.S. chartered commercial bank with consolidated assets of $100 billion or more selected by the trustee that is reasonably satisfactory to us, or (iii) in U.S. government securities, within the meaning of Section 2(a)(16) of the Investment Company Act of 1940, as amended (the “Investment Company Act”) with a maturity of 185 days or less, or in money market funds meeting certain conditions under Rule 2a-7 under the Investment Company Act, which invest only in direct U.S. government treasury obligations. To mitigate the risk that we might be deemed to be an investment company for purposes of the Investment Company Act, which risk increases the longer we hold investments in the trust account, we may, at any time, instruct the trustee to liquidate the investments held in the trust account and instead to hold the funds in the trust account uninvested in cash or in an interest-bearing or non-interest-bearing demand deposit account. For more information about the risk of the company being considered to be operating as an unregistered investment company, see “Risk Factors— Risks Relating to our Search for, Consummation of, or Inability to Consummate, a Business Combination — If we are deemed to be an investment company under the Investment Company Act, we may be required to institute burdensome compliance requirements and our activities may be restricted, which may make it difficult for us to complete our initial business combination or force us to abandon our efforts to complete an initial business combination.”

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Prior to this offering, there has been no public market for our units, ordinary shares or warrants. Our units have been approved for listing on the Nasdaq Global Market, or Nasdaq, under the symbol “GUACU”. We expect the ordinary shares and warrants comprising the units will begin separate trading on the 52nd day following the date of this prospectus unless Needham & Company, LLC (“Needham”), the representative of the underwriters of this offering, 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 public shares and warrants will be listed on Nasdaq under the symbols “GUAC” and “GUACW”, 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, may be made to the public in the Cayman Islands to subscribe for our securities.

Per Unit Total

Public offering price $	10.00 274,000,000

Underwriting discounts and commissions (1) $	0.4295 11,767,600

Proceeds, before expenses, to us $	9.5705 262,232,400

(1)	Includes approximately $0.0395 per unit (excluding any units sold pursuant to the underwriters’ option to purchase additional units), or $1,081,600 in the aggregate (whether or not the underwriters’ option to purchase additional units is exercised), payable to the underwriter upon the closing of this offering. Also includes $0.39 per unit, or $10,686,000 in the aggregate (or up to $12,288,900 if the overallotment option is exercised in full), payable to the underwriter in this offering, for deferred underwriting commissions to be placed in a trust account located in the United States and released to the underwriters only upon the completion of an initial business combination. However, such deferred commissions shall be due solely from amounts remaining in the trust account following all properly submitted shareholder redemptions in connection with the consummation of our initial business combination and less any funds sourced by initial shareholders or any cash remaining in the trust pursuant to structured agreements such as forward purchase agreements, non-redemption agreements, any agreements or arrangements alike, or any other incentivization provided to the shareholders to not to redeem. See also “ Underwriting ” for a description of compensation and other items of value payable to the underwriters.

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 May 18, 2026.

Sole Book-Running Manager

Needham & Company

May 14, 2026

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Table of Contents

SUMMARY 1

THE OFFERING 22

SUMMARY FINANCIAL DATA 47

RISK FACTORS 48

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS 96

USE OF PROCEEDS 98

DIVIDEND POLICY 102

DILUTION 103

CAPITALIZATION 106

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS 107

PROPOSED BUSINESS 114

MANAGEMENT 149

PRINCIPAL SHAREHOLDERS 160

CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS 163

DESCRIPTION OF SECURITIES 166

TAXATION 187

UNDERWRITING 199

LEGAL MATTERS 209

EXPERTS 209

WHERE YOU CAN FIND ADDITIONAL INFORMATION 209

INDEX TO FINANCIAL STATEMENTS F-1

We have not, and the underwriters have not, authorized anyone to provide you with information that is different from or inconsistent with that contained in this prospectus. We are not, and the underwriters are not, making an offer to sell securities in any jurisdiction where the offer or sale is not permitted. You should not assume that the information contained in this prospectus is accurate as of any date other than the date on the front of this prospectus.

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TRADEMARKS

This prospectus contains references to trademarks and service marks belonging to other entities. Solely for convenience, trademarks and trade names referred to in this prospectus may appear without the ® or ™ symbols, but such references are not intended to indicate, in any way, that the applicable licensor will not assert, to the fullest extent under applicable law, its rights to these trademarks and trade names. We do not intend our use or display of other companies’ trade names, trademarks or service marks to imply a relationship with, or endorsement or sponsorship of us by, any other companies.

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SUMMARY