Company: QSEA
Filing Date: 2025-03-11
Form Type: S-1/A
Source: 0001829126-25-001676
Chunk: 279

Company: Quartzsea Acquisition Corp
Filing Date: 2025-03-11
Form: S-1/A
Chunk 279
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 the First Amendment to the Administrative Services Agreement, pursuant to which the monthly fee was amended to $15,000.

The subsequent events mentioned in this note
have been updated and reflected in Notes 1, 2, 5 and 7.

Note 10 — Other Subsequent Events

On March 7, 2025, the Company modified the following
key terms of the Proposed Public Offering to:

| 1) | Decrease the number of months to consummate its                                                                             
 initial business combination from 18 months to 15 months;                                                                   |
| 2) | Decrease the initial amount to be held in the trust                                                                         
 account from $10.05 per unit to $10.00 per unit; and                                                                        |
| 3) | Decrease the number of Private Placement Units                                                                              
 to be purchased by the Sponsor from 245,000 units (or 256,250 units if the underwriters’ over-allotment option is exercised 
 in full) to 218,250 units (or  225,000 units if the over-allotment option is exercised in full) at a price of $10.00 per    
 unit for an aggregate purchase price of $2,182,500 (or $2,250,000 if the over-allotment option is exercised in full).       |

On March 7, 2025, the Company and the Sponsor
entered into the Second Amendment to the Administrative Services Agreement, pursuant to which the monthly fee was amended to $20,000.

The subsequent events mentioned in this note have
been updated and reflected in Notes 1, 3, 4, 5 and 7.

<div align='center'>F-16</div>

<div align='center'>$60,000,000

Quartzsea Acquisition Corporation

6,000,000 Units

PROSPECTUS

Sole Book-Running Manager

SPAC Advisory Partners

[●], 2025</div>

Until __________, 2024 (25 days
after the date of this prospectus), all dealers that buy, sell or trade our ordinary shares, whether or not participating in this offering,
may be required to deliver a prospectus. This is in addition to the dealers’ obligation to deliver a prospectus when acting as
underwriters and with respect to their unsold allotments or subscriptions.

No dealer, salesperson or any
other person is authorized to give any information or make any representations in connection with this offering other than those contained