Company: QSEA
Filing Date: 2025-10-15
Form Type: NT 10-Q
Source: 0001829126-25-008111
Chunk: 0

Company: Quartzsea Acquisition Corp
Filing Date: 2025-10-15
Form: NT 10-Q
Chunk 0
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 12b-25

NOTIFICATION OF LATE FILING</div>

| Nothing in this form shall be construed to imply that the Commission has verified any information contained herein. |

If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:

PART I — REGISTRANT INFORMATION

| Quartzsea Acquisition Corporation                         |
| Full Name of Registrant                                   |
| Former Name if Applicable                                 |
| 1185 Avenue of the Americas, Suite 349                    |
| Address of Principal Executive Office (Street and Number) |
| New York, New York 10036                                  |
| City, State and Zip Code                                  |

PART II — RULES 12b-25(b) AND (c)

If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate)

|   | -a | The reason described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense                                                                                                                                                                                                                                                                                                                                       |
| ☒ | -b | The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, Form N-SAR or Form N-CSR, or portion thereof, will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q or subject distribution report on Form 10-D, or portion thereof, will be filed on or before the fifth calendar day following the prescribed due date; and |
|   | -c | The accountant’s statement or other exhibit required by Rule 12b-25(c) has been attached if applicable.                                                                                                                                                                                                                                                                                                                                                                 |

PART III — NARRATIVE

State below in reasonable detail why Forms 10-K, 20-F, 11-K, 10-Q, 10-D, N-SAR, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.

The Company was unable to compile the necessary financial information and valuations required to prepare a complete filing. Thus, the Company would be unable to file the periodic report in a timely manner without unreasonable effort or expense. The Company expects to file within the extension period as required