# EDGAR Filing Document

**Accession Number:** 0002047455
**File Stem:** 0001829126-25-008126
**Filing Date:** 2025-10
**Character Count:** 5792
**Document Hash:** 39a9c4d0a1d989967548343c742b77a1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001829126-25-008126.hdr.sgml**: 20251015

**ACCESSION NUMBER**: 0001829126-25-008126

**CONFORMED SUBMISSION TYPE**: NT 10-Q/A

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250831

**FILED AS OF DATE**: 20251015

**DATE AS OF CHANGE**: 20251015

**EFFECTIVENESS DATE**: 20251015

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Quartzsea Acquisition Corp
- **CENTRAL INDEX KEY:** 0002047455
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 000000000
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1130

**FILING VALUES:**
- **FORM TYPE:** NT 10-Q/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42555
- **FILM NUMBER:** 251394542

**BUSINESS ADDRESS:**
- **STREET 1:** SUITE 331
- **STREET 2:** 1185 6TH AVE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10036
- **BUSINESS PHONE:** 212-612-1400

**MAIL ADDRESS:**
- **STREET 1:** SUITE 331
- **STREET 2:** 1185 6TH AVE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10036

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 12b-25/A**

**(Amendment No. 1)**

**NOTIFICATION OF LATE FILING**

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| | |
|:---|:---|
| *(Check one):* | ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ☒ Form 10-Q ☐ Form 10-D ☐ Form N-SAR ☐ Form N-CSR |
|  | For Period Ended: August 31, 2025<br>☐ Transition Report on Form 10-K<br> ☐ Transition Report on Form 20-F<br> ☐ Transition Report on Form 11-K<br> ☐ Transition Report on Form 10-Q<br> ☐ Transition Report on Form N-SAR<br>For the Transition Period Ended: _______________________ |

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**Nothing in this form shall be construed to imply that the Commission has verified any information contained herein.**<br>

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**

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| |
|:---|
| **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, NY 10036** |
| City, State and Zip Code |

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**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)

&nbsp;&nbsp;&nbsp;&nbsp;(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 Registrant is unable to file its Quarterly Report on Form 10-Q for the three-month period ended August 31, 2025 (the "Report"), by the prescribed date of October 15, 2025, without unreasonable effort or expense, because the Registrant needs additional time to complete certain disclosures and analyses to be included in the Report. In accordance with Rule 12b-25 promulgated under the Securities Exchange Act of 1934, as amended, the Registrant intends to file the Report on or prior to the fifth (5<sup>th</sup>) calendar day following the prescribed due date. Additionally, Registrant files this amendment to correct a clerical error filed in the original NT 10-Q, on October 15, 2025, which shows the incorrect "For the period ended" date, September 30, 2025. The correct reporting period like stated above is August 31, 2025.

**PART IV — OTHER INFORMATION**

(1) Name and telephone number of person to contact in regard to this notification

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| | | |
|:---|:---|:---|
| **Qi Gong** | **+1** | **(212) 612-1400** |
| (Name) | (Area Code) | (Telephone Number) |

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| | |
|:---|:---|
| (2) | Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If answer is no, identify report(s). |
|  | ☒ Yes ☐ No |
| (3) | Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? |
|  | ☐ Yes ☒ No |
|  | If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made. |

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**Quartzsea Acquisition Corporation**

(Name of Registrant as Specified in Charter)

Has caused this notification to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | | |
|:---|:---|:---|:---|
| Date | October 15, 2025 | By: | /s/ *Qi Gong* |
|  |  |  | Qi Gong |
|  |  | Title: | Chief Executive Officer and Chairwoman |
|  |  |  | (Principal Executive Officer, Principal Financial and Accounting Officer) |

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