F-1

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and
Stockholders of Dune Acquisition Corporation II

Opinion on the Financial Statement

We have audited the accompanying balance sheet of Dune Acquisition Corporation II (the “Company”) as of May 8, 2025, and the related notes (collectively referred to as the financial statement). In our opinion, the financial statement presents fairly, in all material respects, the financial position of the Company as of May 8, 2025, in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

This financial statement is the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statement based on our audit. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB and in accordance with auditing standards generally accepted in the United States of America. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statement is free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audit, we are required to obtain an understanding of internal control over financial reporting, but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audit included performing procedures to assess the risks of material misstatement of the financial statement, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statement. Our audit also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statement. We believe that our audit provides a reasonable basis for our opinion.

/s/ Grassi & Co., CPAs, P.C.

We have served as the Company’s auditor since 2024.

Jericho, NY

May 14, 2025

F-2

DUNE ACQUISITION CORPORATION II
BALANCE SHEET

MAY 8, 2025

The accompanying notes are an integral part of this financial statement.

F-3

DUNE ACQUISITION CORPORATION II
NOTES TO FINANCIAL STATEMENT
MAY 8, 2025

NOTE 1 — ORGANIZATION AND BUSINESS OPERATIONS

Dune Acquisition Corporation II (the “Company”) is a blank check company incorporated as a Cayman Islands exempted company on September 13, 2024. 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 May 8, 2025, the Company had not commenced any operations. All activity for the period from September 13, 2024 (inception) through May 8, 2025 relates to the Company’s formation and the Initial 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 on cash and cash equivalents from the proceeds derived from the Initial Public Offering. The Company has selected December 31 as its fiscal year end.

The Company’s Sponsor is Dune Acquisition Holdings II LLC (the “Sponsor”). The registration statement for the Company’s Initial Public Offering was declared effective on May 6, 2025. On May 8, 2025, the Company consummated the Initial Public Offering of 14,375,000 units (the “Units”), which includes the full exercise by the underwriters of their over-allotment option in the amount of 1,875,000 Units, at $10.00 per Unit, generating gross proceeds of $143,750,000. Each Unit consists of one Class A ordinary share (“Public Share”) and three-quarters of one redeemable warrant (“Public Warrant”). Each whole warrant entitles the holder to purchase one Class A ordinary share at a price of $11.50 per share. Simultaneously with the closing of the Initial Public Offering, the Company consummated the sale of 2,000,000 Private Placement Warrants (the “Private Placement Warrants”) to the Sponsor, at a price of $1.00 per warrant, generating gross proceeds of $2,000,000. The Company’s management has broad discretion with respect to the specific application of the net proceeds of the Initial Public Offering and the Private Placement Warrants, although substantially all of the net proceeds are intended to be generally applied toward consummating a Business Combination (less deferred underwriting commissions).

Transaction costs amounted to $6,637,469, consisting of $550,000 of cash underwriting fee, $5,750,000 of deferred underwriting fee and $337,469 of other offering costs.

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 amount of deferred underwriting discounts held and taxes payable on the income earned on the Trust Account) at the time of the signing of an agreement to enter into a Business Combination. However, the Company will only complete a Business Combination if the post-Business Combination company owns or acquires 50% or more of the outstanding voting securities of the target or is otherwise not required to register as an investment company under the Investment Company Act of 1940, as amended (the “Investment Company Act”). There is no assurance that the Company will be able to successfully effect a Business Combination.

Following the closing of the Initial Public Offering on May 8, 2025, an amount of $144,109,375 ($10.025 per Unit) from the net proceeds of the sale of the Units and the sale of the Private Placement Warrants was 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 it 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 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 for taxes payable or up to $100,000 of interest to pay dissolution expenses, the proceeds from the Initial Public Offering and the sale of the Private Placement Warrants 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 if the Company is unable to complete the initial Business Combination within 15 months from the closing of the Initial Public Offering or by such earlier liquidation date as the 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 shareholders’ rights 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.

F-4

DUNE ACQUISITION CORPORATION II
NOTES TO FINANCIAL STATEMENT
MAY 8, 2025

NOTE 1 — ORGANIZATION AND BUSINESS OPERATIONS (cont.)

The Company will provide the Company’s public shareholders with the opportunity to redeem, regardless of whether they abstain, vote for, or against, the Company’s initial business combination, 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 (which interest shall be net of taxes payable) and not previously released to the Company, divided by the number of then outstanding public shares, subject to the limitations. The amount in the Trust Account is initially anticipated to be $10.025 per public share.

The ordinary shares subject to redemption will be recorded at a redemption value and classified as temporary equity upon the completion of the Initial 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 (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but not more than ten business days thereafter (and subject to lawfully available funds therefor), 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 (net of taxes payable and less up to $100,000 of interest to pay dissolution expenses), divided by the number of then-outstanding public shares, which redemption will completely extinguish public shareholders’ rights as shareholders (including the right to receive further liquidating distributions, if any), subject to applicable law, and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the remaining shareholders and the board of directors, liquidate and dissolve, subject in each case to obligations under Cayman Islands law to provide for claims of creditors and the requirements of other applicable law.

The Sponsor, officers and directors intend to enter into a letter agreement with the Company, pursuant to which they will agree to (i) waive their redemption rights with respect to their founder 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 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 shareholders’ rights or pre-initial business combination activity; (iii) waive their rights to liquidating distributions from the Trust Account with respect to their founder 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 held by them and any public shares purchased during or after the Initial Public Offering (including in open market and privately negotiated transactions) in favor of the initial Business Combination.

F-5

DUNE ACQUISITION CORPORATION II
NOTES TO FINANCIAL STATEMENT
MAY 8, 2025

NOTE 1 — ORGANIZATION AND BUSINESS OPERATIONS (cont.)

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) $10.025 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 $10.025 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 Initial 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.

NOTE 2 — SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The accompanying financial statement is presented in conformity with accounting principles generally accepted in the United States of America (the “US 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.

F-6

DUNE ACQUISITION CORPORATION II
NOTES TO FINANCIAL STATEMENT
MAY 8, 2025

NOTE 2 — SIGNIFICANT ACCOUNTING POLICIES (cont.)

Use of Estimates

The preparation of the financial statement in conformity with US 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 statement.

Making estimates requires management to exercise significant judgment. It is at least reasonably possible that the estimate of the effect of a condition, situation or set of circumstances that existed at the date of the financial statement, which management considered in formulating its estimate, could change in the near term due to one or more future confirming events. Actual results could differ from those estimates.

Cash and Cash Equivalents

The Company considers all short-term investments with an original maturity of three months or less when purchased to be cash equivalents. The Company had $754,183 in cash and no cash equivalents as of May 8, 2025.

Cash Held in Trust Account

As of May 8, 2025, the assets held in the Trust Account, amounting to $144,109,375, were held in cash.

Concentrations of credit risk

Financial instruments that potentially subject the Company to a significant concentration of credit risk consist primarily of cash. Periodically, the Company may maintain deposits in financial institutions in excess of government insured limits. Any loss incurred or a lack of access to such funds could have a significant adverse impact on the Company’s financial condition, results of operations, and cash flows.

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 Initial 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 Initial Public Offering proceeds from the Units between Class A ordinary shares and warrants, using the residual method by allocating Initial Public Offering proceeds first to assigned value of the warrants and then to the Class A ordinary shares. Offering costs allocated to the Class A ordinary shares will be charged to temporary equity and offering costs allocated to the Public and Private Placement Warrants were charged to shareholder’s equity as Public and Private Placement Warrants after management’s evaluation were accounted for under equity treatment.

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 its short-term nature.

F-7

DUNE ACQUISITION CORPORATION II
NOTES TO FINANCIAL STATEMENT
MAY 8, 2025

NOTE 2 — SIGNIFICANT ACCOUNTING POLICIES (cont.)

Income Taxes

The Company accounts for income taxes under 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 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.

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 May 8, 2025, 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.

Warrant Instruments

The Company accounted for the Public and Private Placement Warrants issued in connection with the Initial 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 classified the warrant instruments under equity treatment at their assigned values.

Class A Ordinary Shares Subject to Possible Redemption

The public shares contain a redemption feature which allows for the redemption of such public shares in connection with the Company’s liquidation, or if there is a shareholder vote or tender offer in connection with the Company’s initial Business Combination. In accordance with ASC 480-10-S99, the Company classifies public shares subject to possible redemption outside of permanent equity as the redemption provisions are not solely within the control of the Company. The Company recognizes changes in redemption value immediately as they occur and will adjust the carrying value of redeemable shares to equal the redemption value at the end of each reporting period. Immediately upon the closing of the Initial Public Offering, the Company recognized the accretion from initial book value to redemption amount value. The change in the carrying value of redeemable shares will result in charges against additional paid-in capital (to the extent available) and accumulated deficit. Accordingly, as of May 8, 2025, the Class A ordinary shares subject to possible redemption are presented at redemption value as temporary equity, outside of the shareholders’ deficit section of the Company’s balance sheet. As of May 8, 2025, the Class A ordinary shares subject to possible redemption reflected in the balance sheet are reconciled in the following table:

Recent Accounting Pronouncements

In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The amendments in this ASU require disclosures, on an annual and interim basis, of significant segment expenses that are regularly provided to the chief operating officer decision maker (“CODM”), as well as the aggregate amount of other segment items included in the reported measure of segment profit or loss. The ASU requires that a public entity disclose the title and position of the CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources. Public entities will be required to provide all annual disclosures currently required by Topic 280 in interim periods, and entities with a single reportable segment are required to provide all the disclosures required by the amendments in this ASU and existing segment disclosures in Topic 280. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The Company adopted ASU 2023-07 on September 13, 2024 (inception).

F-8

DUNE ACQUISITION CORPORATION II
NOTES TO FINANCIAL STATEMENT
MAY 8, 2025

NOTE 2 — SIGNIFICANT ACCOUNTING POLICIES (cont.)

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

NOTE 3 — INITIAL PUBLIC OFFERING

Pursuant to the Initial Public Offering on May 8, 2025, the Company will sold 14,375,000 Units at a purchase price of $10.00 per Unit, generating gross proceeds of $143,750,000. Each Unit that consists of one Class A ordinary share and three-quarters of one redeemable warrant. Each whole warrant entitles the holder to purchase one Class A ordinary share at a price of $11.50 per share, subject to adjustment. Each warrant will become exercisable the later of 30 days after the completion of the initial Business Combination and 12 months from the closing of the Initial Public Offering and will expire seven years after the completion of the initial Business Combination, or earlier upon redemption or liquidation.

Warrants — As of May 8, 2025, there were 12,781,250 warrants outstanding, including 10,781,250 public warrants and 2,000,000 Private Placement Warrants.

The Company will not be obligated to deliver any Class A ordinary shares pursuant to the exercise of a warrant and will have no obligation to settle such warrant exercise unless a registration statement under the Securities Act with respect to the Class A ordinary shares underlying the warrants is then effective and a prospectus relating thereto is current, or a valid exemption from registration is available. No warrant will be exercisable and the Company will not be obligated to issue a Class A ordinary share upon exercise of a warrant unless the Class A ordinary share issuable upon such warrant exercise has been registered, qualified or deemed to be exempt under the securities laws of the state of residence of the registered holder of the warrants. In the event that the conditions in the two immediately preceding sentences are not satisfied with respect to a warrant, the holder of such warrant will not be entitled to exercise such warrant and such warrant may have no value and expire worthless. In no event will the Company be required to net cash settle any warrant. In the event that a registration statement is not effective for the exercised warrants, or a valid exemption from registration is not available, the purchaser of a unit containing such warrant will have paid the full purchase price for the unit solely for the Class A ordinary share underlying such unit.

Under the terms of the warrant agreement, the Company has agreed that, as soon as practicable, but in no event later than 20 business days, after the closing of its Business Combination, it will use commercially reasonable efforts to file with the SEC a post-effective amendment to the registration statement for the Initial Public Offering or a new registration statement covering the registration under the Securities Act of the Class A ordinary shares issuable upon exercise of the warrants and thereafter will use its commercially reasonable efforts to cause the same to become effective within 60 business days following the Company’s initial business combination and to maintain a current prospectus relating to the Class A ordinary shares issuable upon exercise of the warrants until the expiration of the warrants in accordance with the provisions of the warrant agreement. If a registration statement covering the Class A ordinary shares issuable upon exercise of the warrants is not effective by the sixtieth (60^th) business day after the closing of the initial Business Combination, warrant holders may, until such time as there is an effective registration statement and during any period when the Company will have failed to maintain an effective registration statement, exercise warrants on a “cashless basis” in accordance with Section 3(a)(9) of the Securities Act or another exemption. Notwithstanding the above, if the Class A ordinary shares are at the time of any exercise of a warrant not listed on a national securities exchange such that they satisfy the definition of a “covered security” under Section 18(b)(1) of the Securities Act, the Company may, at its option, require holders of public warrants who exercise their warrants to do so on a “cashless basis” in accordance with Section 3(a)(9) of the Securities Act and, in the event the Company so elects, the Company will not be required to file or maintain in effect a registration statement, and in the event the Company does not so elect, the Company will use its commercially reasonable efforts to register or qualify the shares under applicable blue sky laws to the extent an exemption is not available.

F-9

DUNE ACQUISITION CORPORATION II
NOTES TO FINANCIAL STATEMENT
MAY 8, 2025

NOTE 3 — INITIAL PUBLIC OFFERING (cont.)

If the holders exercise their public warrants on a cashless basis, they would pay the warrant exercise price by surrendering the warrants for that number of Class A ordinary shares equal to the quotient obtained by dividing (x) the product of the number of Class A ordinary shares underlying the warrants, multiplied by the excess of the “fair market value” of the Class A ordinary shares over the exercise price of the warrants by (y) the fair market value. The “fair market value” is the average reported closing price of the Class A ordinary shares for the 10 trading days ending on the third trading day prior to the date on which the notice of exercise is received by the warrant agent or on which the notice of redemption is sent to the holders of warrants, as applicable.

Redemption of Warrants When the Price per Class A Ordinary Share Equals or Exceeds $18.00:    The Company may redeem the outstanding warrants:

Additionally, if the number of outstanding Class A ordinary shares is increased by a share capitalization payable in Class A ordinary shares, or by a subdivision of ordinary shares or other similar event, then, on the effective date of such share capitalization, subdivision or similar event, the number of Class A ordinary shares issuable on exercise of each warrant will be increased in proportion to such increase in the outstanding ordinary shares. A rights offering made to all or substantially all holders of ordinary shares entitling holders to purchase Class A ordinary shares at a price less than the fair market value will be deemed a share capitalization of a number of Class A ordinary shares equal to the product of (i) the number of Class A ordinary shares actually sold in such rights offering (or issuable under any other equity securities sold in such rights offering that are convertible into or exercisable for Class A ordinary shares) and (ii) the quotient of (x) the price per Class A ordinary share paid in such rights offering and (y) the fair market value. For these purposes (i) if the rights offering is for securities convertible into or exercisable for Class A ordinary shares, in determining the price payable for Class A ordinary shares, there will be taken into account any consideration received for such rights, as well as any additional amount payable upon exercise or conversion, and (ii) fair market value means the volume weighted average price of Class A ordinary shares as reported during the ten (10) trading day period ending on the trading day prior to the first date on which the Class A ordinary shares trade on the applicable exchange or in the applicable market, regular way, without the right to receive such rights.

NOTE 4 — PRIVATE PLACEMENT

Simultaneously with the closing of the Initial Public Offering on May 8, 2025, the Sponsor purchased an aggregate of 2,000,000 Private Placement Warrants at a price of $1.00 per warrant, generating gross proceeds of $2,000,000. Each whole warrant entitles the registered holder to purchase one Class A ordinary share at a price of $11.50 per share, subject to adjustment.

The Private Placement Warrants are identical to the Public Warrants sold in the Initial Public Offering except that, so long as they are held by the Sponsor, the underwriters, or their permitted transferees, the Private Placement Warrants (i) may not (including the Class A ordinary shares issuable upon exercise of these Private Placement Warrants), subject to certain limited exceptions, be transferred, assigned or sold by the holders until 30 days after the completion of the initial Business Combination and (ii) will be entitled to registration rights.

F-10

DUNE ACQUISITION CORPORATION II
NOTES TO FINANCIAL STATEMENT
MAY 8, 2025

NOTE 5 — RELATED PARTY TRANSACTIONS

Founder Shares

On September 27, 2024, the Sponsor made a capital contribution of $25,000, or approximately $0.004 per share, to cover certain of the Company’s expenses, for which the Company issued 6,900,000 founders shares to the Sponsor. On April 22, 2025, the Sponsor surrendered 1,150,000 Class B ordinary shares, where the number of outstanding founder shares was reduced to 5,750,000 in the aggregate. All share and per share data has been retrospectively presented. Up to 750,000 of the founder shares may be surrendered by the Sponsor for no consideration if the underwriters’ over-allotment is not fully exercised. On May 8, 2025, the underwriters exercised their over-allotment option in full as part of the closing of the Initial Public Offering. As such, the 750,000 founder shares are no longer subject to forfeiture. 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.

Promissory Note — Related Party

The Sponsor had agreed to loan the Company an aggregate of up to $150,000, as amended, to be used for a portion of the expenses of the Initial Public Offering. The loan was non-interest bearing, unsecured and due at the earlier of June 30, 2025 and the closing of the Initial Public Offering. As of May 8, 2025, the Company had borrowed $150,000 under the promissory note. This amount was repaid at the close of the Initial Public Offering and borrowings under this note are no longer allowed. .

Administrative Services Agreement

Commencing on the effective date of the Initial Public Offering, May 6, 2025, the Company entered into an agreement with the Sponsor or an affiliate to pay an aggregate of $15,000 per month for utilities and secretarial and administrative support. Upon completion of a Business Combination or its liquidation, the Company will cease paying these monthly fees. As of May 8, 2025, there has been $1,452 accrued under this agreement under accrued expenses in the accompanying balance sheet.

Working Capital Loans

In order to fund working capital deficiencies or 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 warrants of the post Business Combination entity at a price of $1.00 per warrant at the option of the lender. The warrants would be identical to the Private Placement Warrants. As of May 8, 2025, no such Working Capital Loans were outstanding.

F-11

DUNE ACQUISITION CORPORATION II
NOTES TO FINANCIAL STATEMENT
MAY 8, 2025

NOTE 6 — COMMITMENTS AND CONTINGENCIES

Risks and Uncertainties

The United States and global markets are experiencing volatility and disruption following the geopolitical instability resulting from the ongoing Russia-Ukraine conflict and the Israel-Hamas conflict. In response to the ongoing Russia-Ukraine conflict, 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 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, increasing geopolitical tensions among a number of nations. The invasion of Ukraine by Russia and the Israel-Hamas conflict 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 are highly unpredictable, they could lead to market disruptions, including significant volatility in commodity prices, credit and capital markets, as well as supply chain interruptions and increased cyber-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.

Registration Rights

The holders of the (i) founder shares, which were issued in a private placement prior to the closing of the Initial Public Offering, (ii) private placement warrants which will be issued in a private placement simultaneously with the closing of the Initial Public Offering and the Class A ordinary shares underlying such private placement warrants and (iii) private placement warrants that may be issued upon conversion of working capital loans have registration rights to require the Company to register a sale of any of its securities held 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 signed on the effective date of the Initial Public Offering. The holders of these securities are entitled to make up to three demands, excluding short form demands, that the Company registers such securities. In addition, the holders have certain piggyback registration rights with respect to registration statements filed subsequent to the 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 were granted a 45-day option from the date of the Initial Public Offering to purchase up to an additional 1,875,000 units to cover over-allotments, if any. On May 8, 2025, the underwriters exercised their over-allotment option, closing on the 1,875,000 additional units simultaneously with the Initial Public Offering.

The underwriters were entitled to an underwriting discount of $550,000 which was paid in cash upon the closing of the Initial Public Offering.

In addition, the underwriters are also entitled to a deferred underwriting discount of $0.40 per unit, or up to $5,750,000, payable to the underwriters for deferred underwriting commissions and will be placed in the Trust Account. The $0.40 per unit will become payable to the underwriters from the amounts held in the Trust Account solely on amounts remaining in the Trust Account following all properly submitted shareholder redemption in connection with the consummation of the initial Business Combination.

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DUNE ACQUISITION CORPORATION II
NOTES TO FINANCIAL STATEMENT
MAY 8, 2025

NOTE 6 — COMMITMENTS AND CONTINGENCIES (cont.)

Representative Shares

The Company issued 107,813 Class A ordinary shares (“Representative Shares”) to the underwriter or its designee, for nominal consideration. With regard to the Representative Shares, the underwriters have agreed (a) not to transfer, assign or sell any such shares without the Company’s written consent until the completion of the initial Business Combination, (ii) to waive their redemption rights (or right to participate in any tender offer) with respect to such shares in connection with the completion of the initial Business Combination, and (iii) to waive their rights to liquidating distributions from the Trust Account with respect to such shares if the Company does not complete its initial Business Combination within 15 months from the closing of the Initial Public Offering.

The Representative Shares have been deemed compensation by FINRA and are therefore subject to a lock-up for a period of 180 days immediately following the commencement of sales of the Initial Public Offering. Pursuant to FINRA Rule 5110(e)(1), these securities may not be sold, transferred, assigned, pledged or hypothecated nor may they be the subject of any hedging, short sale, derivative, put or call transaction that would result in the economic disposition of the securities by any person for a period of 180 days immediately following the commencement of the Initial Public Offering except to any underwriter and selected dealer participating in the Initial Public Offering and their officers or partners, registered persons or affiliates or as otherwise permitted under FINRA Rule 5110(e)(2).

NOTE 7 — SHAREHOLDERS’ DEFICIT

Preference Shares — The Company is authorized to issue a total of 1,000,000 preference shares at par value of $0.0001 each. At May 8, 2025, there were no preference shares issued or outstanding.

Class A Ordinary Shares — The Company is authorized to issue a total of 200,000,000 Class A ordinary shares at par value of $0.0001 each. At May 8, 2025, there were 107,813Class A ordinary shares issued and outstanding, excluding 14,375,000 Class A ordinary shares subject to possible redemption.

Class B Ordinary Shares — The Company is authorized to issue a total of 20,000,000 Class B ordinary shares at par value of $0.0001 each. On September 27, 2024, the Company issued 6,900,000 Class B ordinary shares to the Sponsor for $25,000, or approximately $0.004 per share. On April 22, 2025, the Sponsor surrendered 1,150,000 Class B ordinary shares, where the number of outstanding founder shares was reduced to 5,750,000 in the aggregate. All share and per share data have been retrospectively presented. The founder shares included an aggregate of up to 750,000 shares subject to forfeiture if the over-allotment option is not exercised by the underwriters in full. On May 8, 2025, the underwriters exercised their over-allotment option in full as part of the closing of the Initial Public Offering. As such, the 750,000 founder shares are no longer subject to forfeiture.

The founder shares will automatically convert into Class A ordinary shares concurrently with or immediately following 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. 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 Initial 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, 28.4% of the sum of (i) the total number of all Class A ordinary shares outstanding upon the completion of this offering (including any Class A ordinary shares issued pursuant to the underwriters’ over-allotment option and excluding the Class A ordinary shares underlying the private placement warrants 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 warrants issued to the Sponsor or any of its affiliates or to officers and directors upon conversion of working capital loans) minus (iii) any redemptions of Class A ordinary shares by public shareholders in connection with an initial business combination; provided that such conversion of founder shares will never occur on a less than one-for-one basis.

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DUNE ACQUISITION CORPORATION II
NOTES TO FINANCIAL STATEMENT
MAY 8, 2025

NOTE 7 — SHAREHOLDERS’ DEFICIT (cont.)

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 Company’s amended and restated memorandum and articles of association, which requires the affirmative vote of 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, voting together as a single class, and includes a unanimous written resolution. Approval of certain actions requires a special resolution under Cayman Islands law, which (except as specified below) requires the affirmative vote of a majority 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 of the Company, and pursuant to the 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 initial Business Combination, the holders of more than 50% of ordinary shares voted for the appointment of directors can elect 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 amend the constitutional documents or 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 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.

NOTE 8 — SUBSEQUENT EVENTS

The Company evaluated subsequent events and transactions that occurred after the balance sheet date through the date that the financial statement was issued. Based upon this review, the Company did not identify any subsequent events that would have required adjustment or disclosure in the financial statement.

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