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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determined by dividing the amount of cash contributed to the company by the number of founder shares issued. The number of founder shares outstanding was determined based on the expectation that the total size of this offering would be a maximum of 31,510,000 units if the underwriters’ over-allotment option is exercised in full, and therefore that such founder shares would represent 20% of the outstanding shares after this offering. Up to 1,027,500 of the founder shares held by the sponsor and sponsor affiliates will be forfeited for no consideration depending on the extent to which the underwriters’ over-allotment option is not exercised. Table of Contents The founder shares are identical to the ordinary shares included in the units being sold in this offering, except that: ● the founder shares are subject to certain transfer restrictions, as described in more detail below; ● the founder shares are entitled to registration rights;

●	our initial shareholders and officers and directors have entered into a letter agreement with us, pursuant to which they have agreed to (i) waive their redemption rights with respect to any founder shares they hold and any public shares (including public shares that are part of a public unit) the sponsor, sponsor affiliates, officers and directors may acquire during or after this offering in connection with the completion of our initial business combination, (ii) waive their redemption rights with respect to any founder shares they hold and any public shares held by the sponsor, sponsor affiliates, officers and directors in connection with a shareholder vote to approve an amendment to our articles (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 and (iii) waive their rights to liquidating distributions from the trust account with respect to any founder shares they hold if we fail to complete our initial business combination within the completion window (although they will be entitled to liquidating distributions from the trust account and to liquidating distributions from assets outside the trust account with respect to any public shares they hold if we fail to complete our initial business combination within the prescribed time frame); and

●	if we submit our initial business combination to our public shareholders for a vote, our initial shareholders have agreed to vote any founder shares they held and any public shares the sponsor, sponsor affiliates, officers and directors purchased during or after this offering in favor of our initial business combination (except with respect to any such public shares which may not be voted in favor of approving the business combination transaction in accordance with the requirements of Rule 14e-5 under the Exchange Act and any SEC interpretations or guidance relating thereto). We will only complete our initial business combination if the business combination is approved by an ordinary resolution under Cayman Islands law, meaning the affirmative vote of at least a majority of the votes by the shareholders of the issued shares represented in person or represented by proxy and are voted at a general meeting of the company, voting together as a single class. As a result, in addition to our initial shareholders’ founder shares, we would need 10,275,001 or 37.5% of the 27,400,000 public shares sold in this offering to be voted in favor of an initial business combination in order to have our initial business combination approved (assuming all outstanding shares are voted, the over-allotment option is not exercised and the parties to the letter agreement do not acquire any public shares). Assuming that only the holders of one-third of our issued and outstanding ordinary shares, representing a quorum under our articles, vote their ordinary shares at a general meeting of the company, we will not need any public shares in addition to our founder shares to be voted in favor of an initial business combination in order to approve an initial business combination.

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Transfer restrictions on founder shares Our initial shareholders have agreed not to transfer, assign or sell any of their founder shares until the earlier to occur of: (i) 18 months after the completion of our initial business combination or (ii) the date on which we complete a liquidation, merger, share exchange or other similar transaction after our initial business combination that results in all of our shareholders having the right to exchange their ordinary shares for cash, securities or other property; except to certain permitted transferees and under certain circumstances as described herein under “ Principal Shareholders — Transfers of Founder Shares and Private Placement Warrants ,” or (iii) if the closing price of the ordinary shares equals or exceeds $12.00 per share (as adjusted for share sub-divisions, share capitalizations, reorganizations, recapitalizations and the like) for any 20 trading days within any 30 trading-day period commencing at least 150 days after the company’s initial business combination. Any permitted transferees will be subject to the same restrictions and other agreements of our initial shareholders with respect to any founder shares. We refer to such transfer restrictions throughout this prospectus as the lock-up.

Voting Each ordinary share will entitle the holder to one vote, with respect to matters submitted to a vote of our shareholders prior to or in connection with the completion of our initial business combination, including any vote in connection with our initial business combination, except as required by law.

Private placement warrants and underlying shares Our sponsor has 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, or $3,500,000 in the aggregate, in a private placement that will close simultaneously with the closing of this offering. The private placement warrants will also be worthless if we do not complete our initial business combination. The private placement warrants are identical to the warrants sold in this offering except that (i) the private placement warrants (including the underlying shares) may not, subject to certain limited exceptions, be transferred, assigned or sold by the holders until 30 days after the completion of our initial business combination, (ii) they (including the underlying shares) will be entitled to registration rights, (iii) they will not be redeemable by us and (iv) they may be exercised by the holders on a cashless basis.

A portion of the purchase price of the private placement warrants will be added to the proceeds from this offering to be held in the trust account such that at the time of closing $274,000,000 (or $315,100,000 if the underwriters exercise their over-allotment option in full) will be held in the trust account.

Proceeds to be held in trust account Nasdaq rules provide that at least 90% of the gross proceeds from this offering and the sale of the private placement warrants be deposited in a trust account. Of the net proceeds we will receive from this offering and the sale of the private placement warrants described in this prospectus, 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, an aggregate of $274,000,000, or $315,100,000 if the underwriters’ over-allotment option is exercised in full ($10.00 per unit in either case), 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,

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