Pinnacle Acquisition Corp

Note 1 — Organization and Business Operations

Pinnacle Acquisition Corporation (the “Company”) is a blank check company incorporated as a Cayman Islands exempted company on March 16, 2026. The Company was incorporated for the purpose of effecting a merger, amalgamation, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses (the “Business Combination”). The Company has not selected any specific Business Combination target and the Company has not, nor has anyone on its behalf, engaged in any substantive discussions, directly or indirectly, with any Business Combination target with respect to an initial Business Combination with the Company.

As of March 31, 2026, the Company had not commenced any operations. All activity for the period from March 16, 2026 (inception) through March 31, 2026 relates to the Company’s formation and the Proposed Public Offering (as defined below). The Company will not generate any operating revenues until after the completion of its initial Business Combination, at the earliest. The Company will generate non-operating income in the form of interest income from the proceeds derived from the Proposed Public Offering. The Company has selected December 31 as its fiscal year end.

The Company’s sponsor is PAC Sponsor, LLC (the “Sponsor”). The Company’s ability to commence operations is contingent upon obtaining adequate financial resources through a Proposed Public Offering of 20,000,000 units at $10.00 per unit (the “Units”) (or 23,000,000 Units if the underwriters’ over-allotment option is exercised in full), which is discussed in Note 3 (the “Proposed Public Offering”), and the sale of an aggregate of 225,000 Private Placement Units (including if the underwriters’ over-allotment option is exercised in full) (the “Private Placement Units”) to the Sponsor at a price of $10.00 per Unit, or $2,250,000 in the aggregate, in a private placement that will close simultaneously with the Proposed Public Offering. Each Unit consists of one Class A ordinary share (the “Public Share”), one right entitling the holder thereof to receive one eighth (1/8) of one Class A ordinary share upon the consummation of an initial Business Combination (the “Public Right”) upon the consummation of an initial Business Combination. Each Private Placement Unit consists of one Class A ordinary share (each, a “private placement share”) and one right entitling the holder thereof to receive one eighth (1/8) of one Class A ordinary share upon the consummation of an initial Business Combination (each, a “private placement right”). The Company’s management has broad discretion with respect to the specific application of the net proceeds of the Proposed Public Offering and the Private Placement Units, although substantially all of the net proceeds are intended to be generally applied toward consummating a Business Combination (less deferred underwriting commissions).

The Company’s Business Combination must be with one or more target businesses that together have a fair market value equal to at least 80% of the net balance in the Trust Account (as defined below) (excluding the deferred underwriting commissions and taxes payable on the interest earned on the Trust Account) at the time of the signing of an agreement to enter into a Business Combination. The board of directors will make the determination as to the fair market value of the initial business combination. If the board of directors is not able to independently determine the fair market value of the initial business combination, the Company will obtain an opinion from an independent investment banking firm or another independent entity that commonly renders valuation opinions with respect to the satisfaction of such criteria. There is no assurance that the Company will be able to successfully effect a Business Combination.

Upon the closing of the Proposed Public Offering, management has agreed that an aggregate of $10.00 per Unit sold in the Proposed Public Offering will be held in a trust account (the “Trust Account”) and initially be invested only in U.S. government treasury obligations 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; the holding of these assets in this form is intended to be temporary and for the sole purpose of facilitating the intended Business Combination. To mitigate the risk that the Company might be deemed to be an investment company for purposes of the Investment Company Act, which risk increases the longer that the Company holds investments in the Trust Account, the Company may, at any time (based on the management team’s ongoing assessment of all factors related to the Company’s potential status under the Investment Company Act), instruct the trustee to liquidate the investments held in the Trust Account and instead to hold the funds in the Trust Account in cash or in an interest bearing demand deposit account at a bank. Except with respect to interest earned on the funds held in the Trust Account that may be released to the Company to pay its taxes, if any, the proceeds from the Proposed Public

Note 1 — Organization and Business Operations (cont.)

Offering and the sale of the Private Placement Units will not be released from the Trust Account until the earliest of (i) the completion of the Company’s initial Business Combination, (ii) the redemption of the Company’s public shares (as defined below) if the Company is unable to complete the initial Business Combination within 21 months from the closing of the Proposed Public Offering or by such earlier liquidation date as the Company’s board of directors may approve (the “Completion Window”), subject to applicable law, or (iii) the redemption of the Company’s public shares properly submitted in connection with a shareholder vote to amend the Company’s amended and restated memorandum and articles of association to (A) modify the substance or timing of the Company’s obligation to allow redemption in connection with the initial Business Combination or to redeem 100% of the Company’s public shares if the Company has 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 Class A ordinary shares or pre-initial Business Combination activity. The proceeds deposited in the Trust Account could become subject to the claims of the Company’s creditors, if any, which could have priority over the claims of the Company’s public shareholders.

The Company will provide the Company’s public shareholders with the opportunity to redeem all or a portion of their public shares upon the completion of the initial Business Combination either (i) in connection with a general meeting called to approve the initial Business Combination or (ii) without a shareholder vote by means of a tender offer. The decision as to whether the Company will seek shareholder approval of a proposed initial Business Combination or conduct a tender offer will be made by the Company, solely in its discretion. The public shareholders will be entitled to redeem their shares at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account calculated as of two business days prior to the consummation of the initial Business Combination, including interest earned on the funds held in the Trust Account (less taxes payable), divided by the number of then outstanding public shares, subject to the limitations. The amount in the Trust Account is initially anticipated to be $10.00 per public share.

The Public Shares will be recorded at a redemption value and classified as temporary equity upon the completion of the Proposed Public Offering, in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 480, “Distinguishing Liabilities from Equity.”

The Company will have only the duration of the Completion Window to complete the initial Business Combination. However, if the Company is unable to complete its initial Business Combination within the Completion Window, the Company will as promptly as reasonably possible but not more than ten business days thereafter, redeem 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 on the funds held in the Trust Account (less taxes payable and up to $100,000 of interest income to pay liquidation and dissolution expenses), divided by the number of then 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 the Company’s obligations under Cayman Islands law to provide for claims of creditors and subject to the other requirements of applicable law.

The Sponsor, officers and directors have entered into a letter agreement with the Company, pursuant to which they have agreed to (i) waive their redemption rights with respect to their founder shares, private placement shares and public shares in connection with the completion of the initial business combination; (ii) waive their redemption rights with respect to their founder shares, private placement shares and public shares in connection with a shareholder vote to approve an amendment to the Company’s amended and restated memorandum and articles of association; (iii) waive their rights to liquidating distributions from the Trust Account with respect to their founder shares and private placement shares if the Company fails to complete the initial business combination within the Completion Window, although they will be entitled to liquidating distributions from the Trust Account with respect to any public shares they hold if the Company fails to complete the initial Business Combination within the Completion Window and to liquidating distributions from assets outside the Trust Account; and (iv) vote any founder shares and private placement shares held by them and any public shares purchased during or after the Proposed Public Offering (including

Note 1 — Organization and Business Operations (cont.)

in open market and privately-negotiated transactions, aside from shares they may purchase in compliance with the requirements of Rule 14e-5 under the Exchange Act, which would not be voted in favor of approving the Business Combination) in favor of the initial Business Combination.

The Company’s Sponsor has agreed that it will be liable to the Company if and to the extent any claims by a third party for services rendered or products sold to the Company, or a prospective target business with which the Company has entered into a written letter of intent, confidentiality or other similar agreement or Business Combination agreement, reduce the amount of funds in the Trust Account to below the lesser of (i) $10.00 per public share and (ii) the actual amount per public share held in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10.00 per share due to reductions in the value of the trust assets, less taxes payable, provided that such liability will not apply to any claims by a third party or prospective target business who executed a waiver of any and all rights to the monies held in the Trust Account (whether or not such waiver is enforceable) nor will it apply to any claims under the Company’s indemnity of the underwriters of the Proposed Public Offering against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). However, the Company has not asked the Sponsor to reserve for such indemnification obligations, nor has the Company independently verified whether the Sponsor has sufficient funds to satisfy its indemnity obligations and the Company believes that the Sponsor’s only assets are securities of the Company. Therefore, the Company cannot assure that the Sponsor would be able to satisfy those obligations.

Going Concern Considerations

At March 31, 2026, the Company had no cash and a working capital deficit of $49,444. The Company has incurred and expects to continue to incur significant costs in pursuit of its financing and acquisition plans. In connection with the Company’s assessment of going concern considerations in accordance with ASC 205-40, “Presentation of Financial Statements — Going Concern,” the Company lacks the financial resources it needs to sustain operations for a reasonable period of time, which is considered to be one year from the date of the issuance of the financial statements. This condition raises substantial doubt about the Company’s ability to continue as a going concern. Management plans to address this uncertainty through the Proposed Public Offering as discussed in Note 3. There is no assurance that the Company’s plans to raise capital or to consummate a Business Combination will be successful or successful within the Combination Period. The financial statements do not include any adjustments that might result from the outcome of this uncertainty.

Note 2 — Significant Accounting Policies

Basis of Presentation

The accompanying financial statements are presented in conformity with accounting principles generally accepted in the United States of America (the “U.S. GAAP”) and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”).

Emerging Growth Company Status

The Company is an “emerging growth company,” as defined in Section 2(a) of the Securities Act, as modified by the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”), and it may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies including, but not limited to, not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in its periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and shareholder approval of any golden parachute payments not previously approved.

Note 2 — Significant Accounting Policies (cont.)

Further, Section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that an emerging growth company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging growth companies but any such election to opt out is irrevocable. The Company has elected not to opt out of such extended transition period which means that when a standard is issued or revised and it has different application dates for public or private companies, the Company, as an emerging growth company, can adopt the new or revised standard at the time private companies adopt the new or revised standard. This may make comparison of the Company’s financial statements with another public company which is neither an emerging growth company nor an emerging growth company which has opted out of using the extended transition period difficult or impossible because of the potential differences in accounting standards used.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of expenses during the reporting period. Actual results could differ from those estimates.

Deferred Offering Costs

The Company complies with the requirements of the ASC 340-10-S99 and SEC Staff Accounting Bulletin Topic 5A, “Expenses of Offering.” Deferred offering costs consist principally of professional and registration fees that are related to the Proposed Public Offering. FASB ASC 470-20, “Debt with Conversion and Other Options,” addresses the allocation of proceeds from the issuance of convertible debt into its equity and debt components. The Company applies this guidance to allocate Proposed Public Offering proceeds from the Units between Class A ordinary shares and rights, by allocating Proposed Public Offering proceeds first to assigned value of the rights and then to the Class A ordinary shares. Offering costs allocated to the Public and Private Placement Units will be allocated to temporary equity and shareholder’s deficit, based on the classification of underlying financial instruments. Should the Proposed Public Offering prove to be unsuccessful, these deferred costs, as well as additional expenses to be incurred, will be charged to operations.

Fair Value of Financial Instruments

The fair value of the Company’s assets and liabilities, which qualify as financial instruments under FASB ASC 820, “Fair Value Measurements and Disclosures,” approximates the carrying amounts represented in the balance sheet, primarily due to their short-term nature.

Net Loss per Class B Ordinary Share

Net loss per Class B ordinary share is computed by dividing net loss by the weighted average number of Class B ordinary shares outstanding during the period, excluding ordinary shares subject to forfeiture. At March 31, 2026, the Company did not have any dilutive securities and other contracts that could, potentially, be exercised or converted into ordinary shares and then share in the earnings of the Company. As a result, diluted loss per Class B ordinary share is the same as basic loss per Class B ordinary share for the period presented.

Income Taxes

The Company accounts for income taxes under FASB ASC Topic 740, “Income Taxes,” which requires an asset and liability approach to financial accounting and reporting for income taxes. Deferred income tax assets and liabilities are computed for differences between the financial statement and tax bases of assets and liabilities that will result in future

Note 2 — Significant Accounting Policies (cont.)

taxable or deductible amounts, based on enacted tax laws and rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances are established, when necessary, to reduce deferred tax assets to the amount expected to be realized.

FASB ASC Topic 740 prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more likely than not to be sustained upon examination by taxing authorities. The Company’s management determined that the Cayman Islands is the Company’s major tax jurisdiction. The Company recognizes accrued interest and penalties related to unrecognized tax benefits as income tax expense. As of March 31, 2026, there were no unrecognized tax benefits and no amounts accrued for interest and penalties. The Company is currently not aware of any issues under review that could result in significant payments, accruals or material deviation from its position.

The Company is considered to be an exempted Cayman Islands company with no connection to any other taxable jurisdiction and is presently not subject to income taxes or income tax filing requirements in the Cayman Islands or the United States. As such, the Company’s tax provision was zero for the period presented.

Share Rights

The Company will account for the Public and Private Placement Rights issued in connection with the Proposed Public Offering and the private placement in accordance with the guidance contained in FASB ASC Topic 815, “Derivatives and Hedging”. Accordingly, the Company evaluated and will classify the Share Rights under equity treatment at their assigned values.

Derivative Financial Instruments

The Company evaluates its financial instruments to determine if such instruments are derivatives or contain features that qualify as embedded derivatives in accordance with FASB ASC Topic 815, “Derivatives and Hedging”. For derivative financial instruments that are accounted for as liabilities, the derivative instrument is initially recorded at its fair value on the grant date and is then re-valued at each reporting date, with changes in the fair value reported in the statement of operations. The classification of derivative instruments, including whether such instruments should be recorded as liabilities or as equity, is evaluated at the end of each reporting period. Derivative liabilities are classified in the balance sheet as current or non-current based on whether or not net cash settlement or conversion of the instrument could be required within 12 months of the balance sheet date. The underwriters’ 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 FASB ASC Topic 480 if not fully exercised at the time of the Proposed Public Offering.

Recent Accounting Pronouncements

Management does not believe that any recently issued, but not yet effective, accounting standards, if currently adopted, would have a material effect on the Company’s financial statements.

Note 3 — Proposed Public Offering

In the Proposed Public Offering, the Company will offer for sale up to 20,000,000 Units (or 23,000,000 Units if the underwriters’ over-allotment option is exercised in full) at a purchase price of $10.00 per Unit. Each Unit that the Company is offering has a price of $10.00 and consists of one Class A ordinary share, one right entitling the holder thereof to receive one eighth (1/8) of one Class A ordinary share upon the consummation of an initial Business Combination.

Note 4 — Private Placement

The Sponsor has committed to purchase an aggregate of 225,000 Private Placement Units (including if the underwriters’ over-allotment option is exercised ), at a price of $10.00 per unit, or $2,250,000 in the aggregate (including if the underwriters’ over-allotment option is exercised), in a private placement that will close simultaneously with the closing of the Proposed Public Offering.

The Sponsor, officers and directors have entered into a letter agreement with the Company, pursuant to which they have agreed to (i) waive their redemption rights with respect to their founder shares, private placement shares and public shares in connection with the completion of the initial Business Combination; (ii) waive their redemption rights with respect to their founder shares, private placement shares and public shares in connection with a shareholder vote to approve an amendment to the Company’s amended and restated memorandum and articles of association (A) to modify the substance or timing of the Company’s obligation to allow redemption in connection with the initial Business Combination or to redeem 100% of the public shares if the Company has 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 Class A ordinary shares or pre-initial Business Combination activity; (iii) waive their rights to liquidating distributions from the Trust Account with respect to their founder shares and private placement shares if the Company fails to complete the initial Business Combination within the Completion Window, although they will be entitled to liquidating distributions from the Trust Account with respect to any public shares they hold if the Company fails to complete the initial Business Combination within the Completion Window and to liquidating distributions from assets outside the Trust Account; and (iv) vote any founder shares and private placement shares held by them and any public shares purchased during or after the Proposed Public Offering (including in open market and privately-negotiated transactions, aside from shares they may purchase in compliance with the requirements of Rule 14e-5 under the Exchange Act, which would not be voted in favor of approving the Business Combination) in favor of the initial Business Combination.

Note 5 — Related Party Transactions

Founder Shares

As of March 31, 2026, there is one share issued and outstanding. On April 7, 2026, the Sponsor made a capital contribution of $25,000, or approximately $0.0035 per share, to cover certain of the Company’s offering costs and expenses, for which the Company repurchased the one share outstanding and issued 5,750,000 founder shares to the Sponsor. On July 21, 2026, the Sponsor surrendered 1,437,500 founder shares for no consideration and now holds 5,750,000 founder shares. Up to 750,000 of the founder shares may be forfeited by the Sponsor for no consideration depending on the extent to which the underwriters’ over-allotment is exercised.

The Company’s initial shareholders have agreed not to transfer, assign or sell any of their founder shares and any Class A ordinary shares issued upon conversion thereof until the earlier to occur of (i) one year after the completion of the initial Business Combination or (ii) the date on which the Company completes a liquidation, merger, share exchange or other similar transaction after the initial Business Combination that results in all of the Company’s shareholders having the right to exchange their Class A ordinary shares for cash, securities or other property. Any permitted transferees will be subject to the same restrictions and other agreements of the Company’s initial shareholders with respect to any founder shares (the “Lock-up”). Notwithstanding the foregoing, if (1) the closing price of the Class A ordinary shares equals or exceeds $12.00 per share (as adjusted for share subdivisions, 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 initial Business Combination or (2) if the Company consummates a transaction after the initial Business Combination which results in the Company’s shareholders having the right to exchange their shares for cash, securities or other property, the founder shares will be released from the Lock-up.

Advances from Related Party

As of March 31, 2026, the Company owes a related party $66,591 for expenses paid on its behalf, which is included in advances from related party on the accompanying balance sheet.

Note 5 — Related Party Transactions (cont.)

Promissory Note — Related Party

On April 7, 2026, the Sponsor has agreed to loan the Company an aggregate of up to $300,000 to be used for a portion of the expenses of the Proposed Public Offering. The loan is non-interest bearing and unsecured. The promissory note is payable on the earlier of December 31, 2026 or the date the Company consummates the Proposed Public Offering out of the $1,000,000 of offering proceeds that has been allocated to the payment of offering expenses, from amounts available for working capital or from the net proceeds of the offering and the sale of the private placement units not held in the Trust Account. As of March 31, 2026, the Company has no borrowings under the promissory note.

Administrative Services Agreement

Commencing on the effective date of the Proposed Public Offering, the Company will enter into an agreement with the Sponsor or an affiliate of the Sponsor to pay an aggregate of $10,000 per month for accounting, bookkeeping, office space, IT support, research, professional, secretarial and administrative services. Upon completion of a Business Combination or its liquidation, the Company will cease paying these monthly fees. As of March 31, 2026, such arrangements had not been executed.

Working Capital Loans

In order to finance transaction costs in connection with a Business Combination, the Sponsor or an affiliate of the Sponsor or certain of the Company’s officers and directors may, but are not obligated to, loan the Company funds as may be required (the “Working Capital Loans”). If the Company completes a Business Combination, the Company would repay the Working Capital Loans. In the event that a Business Combination does not close, the Company may use a portion of the working capital held outside the Trust Account to repay the Working Capital Loans but no proceeds from the Trust Account would be used to repay the Working Capital Loans. Up to $1,500,000 of such Working Capital 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. Such units would be identical to the Private Placement Units. There are no Working Capital Loans outstanding as of March 31, 2026.

Note 6 — Commitments and Contingencies

Risks and Uncertainties

The United States and global markets have experienced and may continue to experience volatility and disruption following the geopolitical instability resulting from the ongoing Russia-Ukraine conflict and the recent escalation of the conflict in the Middle East and Southwest Asia involving the United States, Israel and Iran and others. Recent hostilities between the United States, Israel and Iran and others have caused significant disruption in the normal flow of oil, refined petroleum products and related commodities, with consequent price rises and associated economic volatility. In response to the ongoing Russia-Ukraine conflict in the Ukraine, the North Atlantic Treaty Organization (“NATO”) deployed additional military forces to eastern Europe, and the United States, the United Kingdom, the European Union and other countries have announced various sanctions and restrictive actions against Russia, Belarus and related individuals and entities, including the removal of certain financial institutions from the Society for Worldwide Interbank Financial Telecommunication (SWIFT) payment system. Certain countries, including the United States, have also provided and may continue to provide military aid or other assistance to Ukraine and to Israel, or have undertaken or will undertake military strikes in the Middle East and Southwest Asia, including but not limited to in Iran, and there have been retaliatory military responses, increasing geopolitical tensions among a number of nations.

Note 6 — Commitments and Contingencies (cont.)

The invasion of Ukraine by Russia and the escalation of the conflict involving the United States, Israel and Iran and others in the Middle East and Southwest Asia and the resulting measures that have been taken, and could be taken in the future, by NATO, the United States, the United Kingdom, the European Union, Israel and its neighboring states and other countries have created global security concerns that could have a lasting impact on regional and global economies. Although the length and impact of the ongoing conflicts and geopolitical turmoil are highly unpredictable, they could lead to market disruptions, including significant volatility in energy and other commodity prices, credit and capital markets, as well as supply chain interruptions, changes in consumer or producer purchasing behavior, reduced availability of certain types of energy for use in the global economy and increased cyber-attacks and potentially other attacks against U.S. companies. Additionally, any resulting sanctions could adversely affect the global economy and financial markets and lead to instability and lack of liquidity in capital markets. Any of the above mentioned factors, or any other negative impact on the global economy, capital markets or other geopolitical conditions resulting from the Russian invasion of Ukraine, the Israel-Hamas conflict and subsequent sanctions or related actions, could adversely affect the Company’s search for an initial Business Combination and any target business with which the Company may ultimately consummate an initial Business Combination.

The holders of the (i) founder shares, (ii) private placement units, (iii) private placement rights, (iv) private placement shares, (v) Class A ordinary shares that may be issued upon conversion of the private placement rights upon the consummation of an initial Business Combination, and (vi) private placement shares that may be issued upon conversion of Working Capital Loans will have registration rights to require the Company to register a sale of any of the securities held by them and any other securities of the company acquired by them prior to the consummation of the initial Business Combination pursuant to a registration rights agreement to be signed prior to or on the effective date of the Proposed Public Offering. The holders of these securities are entitled to make up to three demands, excluding short form demands, that the Company register such securities. In addition, the holders have certain piggyback registration rights with respect to registration statements filed subsequent to completion of the initial Business Combination. The Company will bear the expenses incurred in connection with the filing of any such registration statements.

Underwriting Agreement

The underwriters have a 45-day option from the date of the Proposed Public Offering to purchase up to an additional 3,000,000 units to cover over-allotments, if any.

The underwriters will be entitled to $250,000 (such amount to remain unchanged in the event the underwriters’ over-allotment option is exercised in full), which shall be payable to the underwriters upon the closing of the Proposed Public Offering.

Additionally, the underwriters will be entitled to a deferred underwriting discount of $0.30 per Unit or $6,000,000 in the aggregate (or up to $6,900,000 in the aggregate if the underwriters’ over-allotment option is exercised in full). Such deferred underwriting commissions will not be payable with respect to any shares redeemed in connection with an initial business combination. The deferred underwriting discount will become payable to the underwriters from the amounts held in the Trust Account solely in the event the Company completes its Initial Business Combination.

Advisory Fee

In addition to the underwriting agreement, in connection with the Proposed Public Offering, the Company will enter into an agreement with the underwriters in which the underwriters are entitled to an advisory fee equal to 3% of the gross proceeds raised in the Proposed Public Offering upon and subject to the closing of the initial Business Combination.

Note 7 — Shareholder’s Deficit

Preference Shares— The Company is authorized to issue a total of 5,000,000 preference shares at par value of $0.0001 each. At March 31, 2026, there were no preference shares issued or outstanding.

Class A Ordinary Shares— The Company is authorized to issue a total of 500,000,000 Class A ordinary shares at par value of $0.0001 each. At March 31, 2026, there were no Class A ordinary shares issued or outstanding.

Class B Ordinary Shares— The Company is authorized to issue a total of 50,000,000 Class B ordinary shares at par value of $0.0001 each. As of March 31, 2026, there was one Class B ordinary share issued and outstanding. On April 7, 2026, the Company repurchased the one share outstanding and issued 7,187,500 Class B ordinary shares to the Sponsor for $25,000, or approximately $0.0035 per share. On July 21, 2026, the Sponsor surrendered 1,437,500 founder shares for no consideration and now holds 5,750,000 founder shares. The founder shares include an aggregate of up to 750,000 shares subject to forfeiture if the over-allotment option is not exercised by the underwriters in full.

The founder shares will automatically convert into Class A ordinary shares in connection with the consummation of the initial Business Combination or earlier at the option of the holder on a one-for-one basis, subject to adjustment for share subdivisions, share capitalizations, reorganizations, recapitalizations and the like, and subject to further adjustment as provided herein. In the case that additional Class A ordinary shares, or any other equity-linked securities, are issued or deemed issued in excess of the amounts sold in the Proposed Public Offering and related to or in connection with the closing of the initial business combination, the ratio at which Class B ordinary shares convert into Class A ordinary shares will be adjusted (unless the holders of a majority of the outstanding Class B ordinary shares agree to waive such adjustment with respect to any such issuance or deemed issuance) so that the number of Class A ordinary shares issuable upon conversion of all Class B ordinary shares will equal, in the aggregate, 20% of the sum of (i) the total number of all ordinary shares outstanding upon the completion of the Proposed Public Offering (including any Class A ordinary shares issued pursuant to the underwriters’ over-allotment option and excluding the Class A ordinary shares underlying the shares underlying the private placement units issued to the Sponsor), plus (ii) all Class A ordinary shares and equity-linked securities issued or deemed issued, in connection with the closing of the initial Business Combination (excluding any shares or equity-linked securities issued, or to be issued, to any seller in the initial Business Combination and any private placement-equivalent shares issued to the Sponsor or any of its affiliates or to our officers or directors upon conversion of Working Capital Loans). Such adjustment may result in material dilution to the Company’s public shareholders.

Holders of record of the Company’s Class A ordinary shares and Class B ordinary shares are entitled to one vote for each share held on all matters to be voted on by shareholders. Unless specified in the amended and restated memorandum and articles of association or as required by the Companies Act or stock exchange rules, an ordinary resolution under Cayman Islands law and the amended and restated memorandum and articles of association, which requires the affirmative vote of at least a simple majority of the votes cast by such shareholders as, being entitled to do so, vote in person or, where proxies are allowed, by proxy at the applicable general meeting of the Company is generally required to approve any matter voted on by the Company’s shareholders. Approval of certain actions require a special resolution under Cayman Islands law, which (except as specified below) requires the affirmative vote of at least two-thirds of the votes cast by such shareholders as, being entitled to do so, vote in person or, where proxies are allowed, by proxy at the applicable general meeting, and pursuant to the Company’s amended and restated memorandum and articles of association, such actions include amending the amended and restated memorandum and articles of association and approving a statutory merger or consolidation with another company. There is no cumulative voting with respect to the appointment of directors, meaning, following the Company’s initial Business Combination, the holders of more than 50% of the ordinary shares voted for the appointment of directors can appoint all of the directors. Prior to the consummation of the initial Business Combination, only holders of the Class B ordinary shares will (i) have the right to vote on the appointment and removal of directors and (ii) be entitled to vote on continuing the Company in a jurisdiction outside the Cayman Islands (including any special resolution required to adopt new constitutional documents, in each case, as a result of approving a transfer by way of continuation in a jurisdiction outside the Cayman Islands). Holders of the Class A ordinary shares will not be entitled to vote on these matters during such time. These provisions of the amended and restated memorandum and articles of association may only be amended if approved by a special resolution passed by the affirmative vote of at least 90% (or, where such amendment

Note 7 — Shareholder’s Deficit (cont.)

is proposed in respect of the consummation of the initial Business Combination, two-thirds) of the votes cast by such shareholders as, being entitled to do so, vote in person or, where proxies are allowed, by proxy at the applicable general meeting of the Company.

Rights

Except in cases where the Company is not the surviving company in a Business Combination, each holder of a right will automatically receive one eighth (1/8) of one Class A ordinary share upon consummation of the initial Business Combination, even if the holder of a public right redeemed all Class A ordinary shares held by him, her or it in connection with the initial Business Combination or an amendment to the amended and restated memorandum and articles of association with respect to the pre-initial business combination activities. In the event the Company will not be the surviving company upon completion of our initial Business Combination, each holder of a right will be required to affirmatively convert his, her or its rights in order to receive the one eighth (1/8) of one ordinary share underlying each right upon consummation of the Business Combination. No additional consideration will be required to be paid by a holder of rights in order to receive his, her or its additional Class A ordinary shares upon consummation of an initial Business Combination. The Class A ordinary shares issuable upon conversion of the rights will be freely tradable (except to the extent held by affiliates of ours). If the Company enters into a definitive agreement for a Business Combination in which the Company will not be the surviving entity, the definitive agreement will provide for the holders of rights to receive the same consideration per ordinary share the holders of the Class A ordinary shares will receive in the transaction on an as-converted into Class A ordinary shares basis.

The Company will not issue fractional Class A ordinary shares in connection with an exchange of rights. Fractional shares will either be rounded down to the nearest whole share or otherwise addressed in accordance with Cayman Islands law. As a result, the holder must hold rights in multiples of eight in order to receive Class A ordinary shares for all of their rights upon closing of a Business Combination. If the Company is unable to complete an initial Business Combination within the required time period and the Company liquidates the funds held in the Trust Account, holders of rights will not receive any of such funds with respect to their rights, nor will they receive any distribution from assets held outside of the Trust Account with respect to such rights. Further, there are no contractual penalties for failure to deliver securities to the holders of the rights upon consummation of an initial Business Combination. Additionally, in no event will the Company be required to cash settle the rights. Accordingly, the rights may have no value to the holder.

Note 8 — Segment Information

FASB ASC Topic 280, “Segment Reporting,” establishes standards for companies to report in their financial statement information about operating segments, products, services, geographic areas, and major customers. Operating segments are defined as components of an enterprise that engage in business activities from which it may recognize revenues and incur expenses, and for which separate financial information is available that is regularly evaluated by the Company’s CODM, or group, in deciding how to allocate resources and assess performance.

The Company’s CODM has been identified as the Chief Executive Officer, who reviews the assets, operating results, and financial metrics for the Company as a whole to make decisions about allocating resources and assessing financial performance. Accordingly, management has determined that the Company only has one reportable segment.

The CODM assesses performance for the single segment and decides how to allocate resources based on net income or loss that also is reported on the statement of operations as net income or loss. The measure of segment assets is reported on the balance sheet as total assets. When evaluating the Company’s performance and making key decisions regarding resource allocation the CODM reviews several key metrics, which include the following:

Note 8 — Segment Information (cont.)

General and administrative expenses are reviewed and monitored by the CODM to manage and forecast cash to ensure enough capital is available to complete a business combination or similar transaction within the business combination period. The CODM also reviews general and administrative expenses to manage, maintain and enforce all contractual agreements to ensure costs are aligned with all agreements and budget. General and administrative expenses, as reported on the statement of operations, are the significant segment expenses provided to the CODM on a regular basis.

Note 9 — Subsequent Events

The Company evaluated subsequent events and transactions that occurred after the balance sheet date and through the date that the financial statements were issued. Based upon this review, other than as described above and below, the Company did not identify any subsequent events that would have required adjustment or disclosure in the financial statements.

On April 7, 2026, the Sponsor has agreed to loan the Company an aggregate of up to $300,000 to be used for a portion of the expenses of the Proposed Public Offering. The loan is non-interest bearing, unsecured and due at the earlier of December 31, 2026 or the closing of the Proposed Public Offering.

On April 7, 2026, the Sponsor paid $25,000, or approximately $0.0035 per share, to cover certain of the offering costs in exchange for the repurchase of the one share outstanding and issuance of 7,187,500 founder shares. On July 21, 2026, the Sponsor surrendered 1,437,500 founder shares for no consideration and now holds 5,750,000 founder shares. Up to 750,000 of the founder shares may be surrendered by the Sponsor for no consideration depending on the extent to which the underwriters’ over-allotment option is exercised.

20,000,000 Units

––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––

PRELIMINARY PROSPECTUS

, 2026

––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––

Joint Book-Running Managers

Until , 2026 (25 days after the date of this prospectus), all dealers that buy, sell or trade our units, Class A ordinary shares or public rights, whether or not participating in this offering, may be required to deliver a prospectus. This is in addition to the dealers’ obligation to deliver a prospectus when acting as underwriters and with respect to their unsold allotments or subscriptions.

PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 13. Other Expenses of Issuance and Distribution.

The estimated expenses payable by us in connection with the offering described in this registration statement (other than the underwriting discount and commissions) will be as follows:

Item 14. Indemnification of Directors and Officers.

Cayman Islands law does not limit the extent to which a company’s amended and restated memorandum and articles of association may provide for indemnification of officers and directors, except to the extent any such provision may be held by the Cayman Islands courts to be contrary to public policy, such as to provide indemnification against willful default, willful neglect, actual fraud or the consequences of committing a crime. Our amended and restated memorandum and articles of association will provide for indemnification of our officers and directors to the maximum extent permitted by law, including for any liability incurred in their capacities as such, except through their own actual fraud, willful default or willful neglect. We will enter into agreements with our directors and officers to provide contractual indemnification in addition to the indemnification provided for in our amended and restated memorandum and articles of association. We expect to purchase a policy of directors’ and officers’ liability insurance that insures our officers and directors against the cost of defense, settlement or payment of a judgment in some circumstances and insures us against our obligations to indemnify our officers and directors.

Our officers and directors have agreed to waive any right, title, interest or claim of any kind in or to any monies in the trust account, and have agreed to waive any right, title, interest or claim of any kind they may have in the future as a result of, or arising out of, any services provided to us and will not seek recourse against the trust account for any reason whatsoever (except to the extent they are entitled to funds from the trust account due to their ownership of public shares). Accordingly, any indemnification provided will only be able to be satisfied by us if (i) we have sufficient funds outside of the trust account or (ii) we consummate an initial business combination.

Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers or persons controlling us pursuant to the foregoing provisions, we have been informed that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is therefore unenforceable.

Item 15. Recent Sales of Unregistered Securities.

On April 7, 2026, PAC Sponsor, LLC, our sponsor, paid $25,000, or approximately $0.0035 per share, to cover certain of our offering costs in exchange for 7,187,500 founder shares. On July 21, 2026, the sponsor surrendered 1,437,500 founder shares for no consideration and now holds 5,750,000 founder shares. Such securities were issued in connection with our organization pursuant to the exemption from registration contained in Section 4(a)(2) of the Securities Act. The number of founder shares issued and outstanding was determined based on the expectation that the total size of this offering would be a maximum of 23,000,000 units if the underwriters’ over-allotment option is exercised in full and therefore that such founder shares would represent 20% of the total number of issued and outstanding ordinary shares after this offering (not including the private placement shares). Up to 750,000 of these shares will be forfeited for no consideration depending on the extent to which the underwriters’ over-allotment is exercised.

Our sponsor is an accredited investor for purposes of Rule 501 of Regulation D. Each of the equity holders in our sponsor is an accredited investor under Rule 501 of Regulation D. The sole business of our sponsor is to act as the company’s sponsor in connection with this offering.

II-1

Our sponsor has committed to purchase an aggregate of 225,000 private placement units (whether or not the underwriters’ over-allotment option is exercised), at a price of $10.00 per unit, or $2,250,000 in the aggregate (whether or not the underwriters’ over-allotment option is exercised), in a private placement that will close simultaneously with the closing of this offering. This purchase will take place on a private placement basis simultaneously with the completion of our initial public offering. This issuance will be made pursuant to the exemption from registration contained in Section 4(a)(2) of the Securities Act.

No underwriting discounts or commissions were paid with respect to such sales.

Item 16. Exhibits and Financial Statement Schedules.

Exhibit Index

• Filed herewith.

II-2

Item 17. Undertakings.

(a) The undersigned registrant hereby undertakes to provide to the underwriters at the closing specified in the underwriting agreement, certificates in such denominations and registered in such names as required by the underwriters to permit prompt delivery to each purchaser.

(b) Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Act and will be governed by the final adjudication of such issue.

(c) The undersigned registrant hereby undertakes that:

(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

• to include any prospectus required by Section 10(a)(3) of the Securities Act of 1933;

• to reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Securities and Exchange Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20 percent change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective registration statement; and

• to include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement.

(2) For the purpose of determining any liability under the Securities Act of 1933, each post-effective amendment that contains a form of prospectus shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(4) For the purpose of determining liability under the Securities Act of 1933 of any purchaser, if the registrant is subject to Rule 430C, each prospectus filed pursuant to Rule 424(b) as part of a registration statement relating to an offering, other than registration statements relying on Rule 430B or other than prospectuses filed in reliance on Rule 430A, shall be deemed to be part of and included in the registration statement as of the date it is first used after effectiveness. Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such first use, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such date of first use.

II-3

(5) For the purpose of determining liability of a registrant under the Securities Act of 1933 to any purchaser in the initial distribution of the securities, the undersigned registrant undertakes that in a primary offering of securities of an undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

(i) any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

(ii) any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by an undersigned registrant;

(iii) the portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and (iv) any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.

II-4