Company: IPODW
Filing Date: 2025-05-08
Form Type: 424B4
Source: 0001213900-25-040894
Chunk: 177

Company: Dune Acquisition Corp II
Filing Date: 2025-05-08
Form: 424B4
Chunk 177
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 significant dilution or have other adverse impacts. See the section titled “Risk Factors — Risks Relating to our Search for, and Consummation of or Inability to Consummate, a Business Combination — We may issue additional Class A ordinary shares or preference shares to complete our initial business combination or under an employee incentive plan after completion of our initial business combination. We may also issue Class A ordinary shares upon the conversion of the founder shares at a ratio greater than one -to -oneat the time of our initial business combination as a result of the anti -dilutionprovisions contained therein. Any such issuances would dilute the interest of our shareholders and likely present other risks.” This dilution would increase to the extent that the anti -dilutionprovision of the founder shares result in the issuance of Class A ordinary shares on a greater than one -to -onebasis upon conversion of the founder shares at the time of our initial business combination. In addition, the exercise of any warrants would cause

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the actual dilution to the public shareholders to be higher, particularly where a cashless exercise is utilized. See “Dilution”. The cashless exercise of the private placement warrants, including private placement warrants that may be issued upon conversion of working capital loans may result in significant dilution to purchasers in this offering. Pursuant to a letter agreement to be entered with us, each of our sponsor, directors and officers has agreed to restrictions on its ability to transfer, assign, or sell the founder shares and private placement warrants (and the underlying securities), as summarized in the table below.

| Subject Securities |     | Expiration Date                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |     | Persons Subject to               
 Restrictions                     |     | Exceptions to Transfer                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
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| Founder Shares     |     | Earlier to occur of (A) one year after the completion of our initial business combination and (B) subsequent to our initial business combination, (x) if the last sale price of our Class A ordinary shares equals or exceeds $12.00 per share (as adjusted for share sub-divisions, share dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after our initial business combination, or (y) the date on which we complete a liquidation, merger, share exchange, reorganization or other similar