Company: IPODW
Filing Date: 2025-05-08
Form Type: 424B4
Source: 0001213900-25-040894
Chunk: 311

Company: Dune Acquisition Corp II
Filing Date: 2025-05-08
Form: 424B4
Chunk 311
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 withheld as backup withholding may be credited against a holder’s United States federal income tax liability, and a holder generally may obtain a refund of any excess amounts withheld under the backup withholding rules by timely filing the appropriate claim for refund with the IRS and furnishing any required information. INVESTORS CONSIDERING THE PURCHASE OF OUR SECURITIES ARE URGED TO CONSULT WITH AND RELY SOLELY UPON THEIR OWN TAX ADVISORS REGARDING THE APPLICATION OF THE U.S. FEDERAL INCOME TAX LAWS TO THEIR PARTICULAR SITUATIONS AND THE APPLICABILITY AND EFFECT OF ANY OTHER TAX LAWS, INCLUDING BUT NOT LIMITED TO U.S. FEDERAL ESTATE AND GIFT TAX LAWS AND ANY STATE, LOCAL OR NON -U .S. TAX LAWS AND TAX TREATIES. 198

UNDERWRITING Clear Street is acting as the lead book running manager and representative of the underwriters of the offering. Subject to the terms and conditions of the underwriting agreement dated May6, 2025, each underwriter named below has severally agreed to purchase, and we have agreed to sell to such underwriters, the number of units set forth opposite the underwriter’s name.

| Underwriter  |     |  Number of 
      Units |
| Clear Street |     | 12,500,000 |
| Total:       |     | 12,500,000 |

The underwriting agreement provides that the obligations of the underwriters to purchase the units included in this offering are subject to approval of legal matters by counsel and to other conditions. The underwriters are obligated to purchase all of the units (other than those covered by the over -allotmentoption described below) if they purchase any of the units. The offering of the units by the underwriters is subject to receipt and acceptance and subject to the underwriters’ right to reject any order in whole or in part. Pricing of the Offering We have been advised by the underwriters that they propose to offer the units to the public at the initial offering price set forth on the cover page of this prospectus. The underwriters may allow dealers concessions not in excess of $0.05 per unit and the dealers may re -allowa concession not in excess of $0.05 per unit to other dealers. After the initial offering of the units, the representatives may change the offering price and other selling terms. The offering of the units by the underwriters is subject to receipt and acceptance and subject to the underwriters’