JAB Acquisition Corp I

The following table illustrates the difference between the public offering price and our net tangible book value (NTBV), as adjusted to give effect to this offering and to redemptions of our public shares at varying levels, assuming the full exercise and no exercise of the over-allotment option. See the section “Dilution.”

The below calculations (A) assume that (i) no ordinary shares are issued to shareholders of a potential business combination target as consideration or issuable by a post-business combination company, for instance under an equity or employee share purchase plan, (ii) no ordinary shares and convertible equity or debt securities are issued in connection with additional financing that we may seek in connection with an initial business combination, and (iii) no working capital loans are converted into private placement units, as further described in this prospectus, and (B) assumes the issuance of 15,000,000 Class A ordinary shares (or 17,250,000 Class A ordinary shares if the underwriter’s over-allotment option is exercised in full), 260,000 private placement units (whether or not the underwriters’ over-allotment option is exercised in full) at a price of $10.00. The issuance of additional ordinary or preference shares may significantly dilute the equity interest of investors in this offering, which dilution would even further increase if the anti-dilution provisions in the Class B ordinary shares resulted in the issuance of Class A ordinary shares on a greater than one-to-one basis upon conversion of the Class B ordinary shares. In the event that following this offering we obtain working capital loans from our sponsor, members of our management team or their affiliates or other third parties to finance transaction costs related to our initial business combination, up to $600,000 of such loans may be convertible into private placement units of the post-business combination entity at a price of $10.00 per unit at the option of the lender. Since we intend to seek an initial business combination with a target company having an aggregate enterprise value greater than the anticipated net proceeds of this offering and the sale of private placement units, we may need to issue additional ordinary shares, preference shares and convertible equity or debt securities in connection with an initial business combination. The terms of such loans, if any, have not been determined and no written agreements exist with respect to such loans. Prior to the completion of our initial business combination, we do not expect to seek loans from parties other than our sponsor or an affiliate of our sponsor as we do not believe third parties will be willing to loan such funds and provide a waiver against any and all rights to seek access to funds in our trust account.

Such calculation does not reflect any dilution associated with the exercise of warrants including the private warrants, which would cause the actual dilution not the pubic shareholders to be higher. Net tangible book value per share is determined by dividing our net tangible book value, which is our total tangible assets less total liabilities (including the value of Class A ordinary shares which may be redeemed for cash), by the number of issued and outstanding Class A ordinary shares.

As of March 24, 2026 our net tangible book value was $1,335 or approximately $0.00 per Class B ordinary shares. Assuming various redemption scenarios and after giving effect to the sale of 15,000,000 Class A ordinary shares included in the units we are offering by this prospectus, the sale of the private placement units and the deduction of underwriting commissions and estimated expenses of this offering, our pro forma net tangible book value at March 24, 2026 would have been the following to the public shareholders on a per-share basis immediately after this offering:

For purposes of presenting the Maximum Redemption scenario, we have reduced our NTBV after this offering (assuming no exercise of the underwriter’s option to purchase additional units) by $10.00 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 amount in the trust account as set forth in our tender offer or proxy materials (initially anticipated to be the aggregate amount held in trust two business days prior to the commencement of our tender offer or shareholders meeting, including interest (less up to $100,000 of interest to pay dissolution expenses), divided by the number of Class A ordinary shares sold in this offering).

As of March 24, 2026

For purposes of presenting the Maximum Redemption scenario, we have reduced our NTBV after this offering (assuming no exercise of the underwriter’s option to purchase additional units) by $10.00 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 amount in the trust account as set forth in our tender offer or proxy materials (initially anticipated to be the aggregate amount held in trust two business days prior to the commencement of our tender offer or shareholders meeting, including interest (less up to $100,000 of interest to pay dissolution expenses), divided by the number of Class A ordinary shares sold in this offering).

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, and directors, officers, or any of their affiliates may also purchase shares 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 net tangible book value per share. See “Proposed Business — Permitted Purchases of Our Securities.”