UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended November 30, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-42555 Quartzsea Acquisition Corporation (Exact name of registrant as specified in its charter) Cayman Islands N/A (State or other jurisdiction of incorpo ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended August 31, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-42555 Quartzsea Acquisition Corporation (Exact Name of Registrant as Specified in Its Charter) Cayman Islands N/A | Large accelerated file ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended May 31, 2025 Commission file number: 001-42555 Quartzsea Acquisition Corporation (Exact Name of Registrant as Specified in Its Charter) Cayman Islands N/A (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 1185 Avenue of the Americas, Suite 304 New York, NY ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended February 28, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-42555 Quartzsea Acquisition Corporation (Exact Name of Registrant as Specified in Its Charter) Cayman Islands N/A (State or other jurisd ...

As filed with the Securities and Exchange Commission on March 13, 2025. Registration No. 333-285152 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-1 Amendment No. 3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 QUARTZSEA ACQUISITION CORPORATION (I.R.S. Employer Identification Number) 1185 Avenue of the Americas, Suite 304 New York, NY 10036 Telephone: (212) 612-1400 (Address, Including Zip Code, and Telephone Number, Including Area Code, of Registrant's Principal Ex ...

As filed with the Securities and Exchange Commission on March 12, 2025. (Exact name of registrant as specified in its charter) Cayman Islands 6770 N/A (State or Other Jurisdiction of Incorporation or Organization) (Primary Standard Industrial Classification Code Number) Registration No. 333-285152 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-1 Amendment No. 2 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 QUARTZSEA ACQUISITION CORPORATION New York, NY 10036 Telepho ...

As filed with the Securities and Exchange Commission on March 10, 2025. Registration No. 333-285152 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-1 Amendment No. 1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 QUARTZSEA ACQUISITION CORPORATION (Exact name of registrant as specified in its charter) Cayman Islands 6770 N/A (State or Other Jurisdiction of Incorporation or Organization) (Primary Standard Industrial Classification Code Number) (I.R.S. Employer Identific ...

As filed with the Securities and Exchange Commission on February 21, 2025. Registration No. 333-[*] UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 QUARTZSEA ACQUISITION CORPORATION Copies to: (Exact name of registrant as specified in its charter) Cayman Islands 6770 N/A (State or Other Jurisdiction of Incorporation or Organization) (Primary Standard Industrial Classification Code Number) (I.R.S. Employer Identification ...