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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Over-Allotment No Over-Allotment Full Over-Allotment Numerator: Net tangible book value before this offering $ 113,907 $ 113,907 $ 113,907 $ 113,907 $ 113,907 $ 113,907 $ 113,907 $ 113,907 $ 113,907 $ 113,907 Plus: Net proceeds from this offering and sale of the private placement warrants (1) 275,100,000 316,200,000 275,100,000 316,200,000 275,100,000 316,200,000 275,100,000 316,200,000 275,100,000 316,200,000 Plus: Offering costs paid in advance, excluded from tangible book value before this offering 295,903 295,903 295,903 295,903 295,903 295,903 295,903 295,903 295,903 295,903 Less: Deferred underwriting fees (10,686,000 ) (12,288,900 ) (10,686,000 ) (12,288,900 ) (10,686,000 ) (12,288,900 ) (10,686,000 ) (12,288,900 ) (10,686,000 ) (12,288,900 ) Less: Amounts paid for redemptions (3) - - (68,500,000 ) (78,775,000 ) (137,000,000 ) (157,550,000 ) (205,500,000 ) (236,325,000 ) (274,000,000 ) (315,100,000 ) Denominator: Class B ordinary shares outstanding prior to this offering (4) 7,877,500 7,877,500 7,877,500 7,877,500 7,877,500 7,877,500 7,877,500 7,877,500 7,877,500 7,877,500

Less: Class B ordinary shares forfeited if over-allotment is not exercised (1,027,500	) - (1,027,500	) - (1,027,500	) - (1,027,500	) - (1,027,500	) -

Plus: Class A ordinary shares included in the units offered 27,400,000 31,510,000 27,400,000 31,510,000 27,400,000 31,510,000 27,400,000 31,510,000 27,400,000 31,510,000

Less: Class A ordinary shares redeemed - - (6,850,000	) (7,877,500	) (13,700,000	) (15,755,000	) (20,550,000	) (23,632,500	) (27,400,000	) (31,510,000	)

(1)	Expenses applied against gross proceeds include offering expenses of approximately $1,318,400 (not including an estimate of $218,780 for director and officer liability insurance premiums to be paid upon closing of this offering, which amount is not an offering expense to be capitalized) and underwriting commissions of $1,081,600. See “ Use of Proceeds .”

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(2)	Represents the value of 45-day over-allotment option from the date of this offering granted to the underwriters to purchase an aggregate of up to 4,110,000 additional units at the initial public offering price less the underwriting commissions. The underwriter’s over-allotment option is deemed to be a freestanding financial instrument indexed on the shares subject to redemption and will be accounted for as a liability pursuant to ASC 480 if not fully exercised at the time of the initial public offering. The table above assumes that the option has either been fully exercised or has expired with no exercise to purchase additional units, thus the value of over-allotment liability in both scenario is $0.

(3)	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 sponsor, initial shareholders, directors, executive officers, advisors or their affiliates may purchase shares or public warrants in privately negotiated transactions or in the open market either prior to or following the completion of our initial business combination. In the event of any such purchases of our shares prior to the completion of our initial business combination, the number of ordinary shares subject to redemption will be reduced by the amount of any such purchases, increasing the pro forma NTBV. See “ Proposed Business — Effecting Our Initial Business Combination — Permitted Purchases of Our Securities .”

(4)	For purposes of presenting the maximum redemption scenario, we have reduced our pro forma net tangible book value after this offering (assuming no exercise of the underwriters’ option to purchase additional shares) by $274,000,000 because holders of up to approximately 100% of our public shares may redeem their shares for a pro rata share of the aggregate amount then on deposit in the trust account at a per share redemption price equal to the aggregate amount then on deposit in the trust account, including interest earned on the funds held in the trust account less taxes paid or payable, divided by the number of then issued and outstanding public shares, subject to the limitations and on the conditions described herein.

The following table sets forth information with respect to our initial shareholders and the public shareholders:

Shares Purchased Total Consideration Average Price

Number Percentage Amount Percentage Per Share

Initial Shareholders (1)(2) 6,850,000 20.0	% $	25,000 0.01	% $	0.004

Public shareholders 27,400,000 80.0	% 274,000,000 99.99	% $	10.00

(1)	Assumes that 1,027,500 founder shares are forfeited after the closing of this offering in the event the underwriters do not exercise their over-allotment option.

In addition to the sources of potential dilution discussed herein, we note that there are additional possible sources of dilution and the extent of such dilution that non-redeeming public shareholders could experience in connection with the closing of the initial business combination may be uncertain, due to the uncertainty associated with the occurrence or the amount of securities that may be issued pursuant to such occurrence, including arising from: (i) the issuance of additional ordinary shares, including founder shares, upon the consummation of this offering if we increase the size of this offering, (ii) the issuance of additional securities as we may seek an initial business combination with a target company with an enterprise value greater than the net proceeds of the offering, (iii) any loans or additional investments from our sponsor, members of our management team or any of their affiliates or designees, including the issuance of warrants upon conversion of working capital loans, (iv) any ordinary shares, preference shares or debt securities that may be issued to third parties pursuant to any equity financing or debt financing in connection with our initial business combination, (v) the issuance of additional ordinary shares upon cashless exercise of private placement warrants, and (vi) the reservation and issuance of any securities under an employee incentive plan after completion of our initial business combination. For further discussions on potential sources of dilutions and potential risks associated thereof, see “Risk Factor — We may issue additional ordinary or preference shares to complete a business combination or under an employee incentive plan after completion of our initial business combination. Any such issuances would dilute the interest of our shareholders and likely present other risks.”

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CAPITALIZATION

The following table sets forth our capitalization at March 31, 2026 and as adjusted to give effect to the sale of our 27,400,000 units in this offering for $274,000,000 (or $10.00 per unit) and the sale of 3,500,000 private placement warrants for $3,500,000 (or $1.00 per warrant) and the application of the estimated net proceeds derived from the sale of such securities:

March 31, 2026

Actual (6) As Adjusted (1)

Notes payable to related party (2) $	67,593 $	-

Deferred underwriting fees - 10,686,000

Over-allotment liability (3) - -

Ordinary shares subject to possible redemption, -0- and 27,400,000 shares are subject to possible redemption, actual and as adjusted, respectively (4) - 274,000,000

Preference shares, $0.0001 par value; 5,000,000 shares authorized; none issued and outstanding, actual and as adjusted - -

Ordinary shares, $0.0001 par value, 550,000,000 shares authorized; 7,877,500 and 6,850,000 shares issued and outstanding, actual and as adjusted, respectively (excluding -0- and 27,400,000 shares subject to possible redemption, actual and as adjusted, respectively) 788 685

Additional paid-in capital 934,269 -

Accumulated deficit (5) (129,570	) (8,781,198	)

Total shareholders’ (deficit) equity $	805,487 $	(8,780,513	)

Total capitalization $	873,080 $	275,905,487

(1)	The “as adjusted” share amount assumes no exercise of the underwriters’ option to purchase additional units and the forfeiture of 1,027,500 founder shares.

(2)	Our sponsor may loan us up to $300,000 under unsecured, non-interest bearing promissory notes for offering-related and organizational expenses. Such loans are due at the earlier of December 31, 2026 or the closing of this offering and are anticipated to be repaid upon completion of this offering out of the $1,318,400 of offering proceeds that has been allocated for the payment of offering expenses other than underwriting commissions. As of March 31, 2026, we had borrowed approximately $68,000 under this promissory note.

(3)	The underwriter’s over-allotment option is deemed to be a freestanding financial instrument indexed on the shares subject to redemption and will be accounted for as a liability pursuant to ASC 480 if not fully exercised at the time of the initial public offering. The table above assumes that the option has expired with no exercise to purchase additional units, thus the value of over-allotment liability at this point is $0.