SCHEDULE 13G 0002077140 XXXXXXXX LIVE Class A Ordinary Shares, par value $0.0001 per share 07/16/2025 0002069238 Pyrophyte Acquisition Corp. II G7309T102 3262 Westheimer Road Suite 706 Houston TX 77098 Pyrophyte Acquisition II LLC DE 7135721.00 0.00 7135721.00 0.00 7135721.00 N 26.2 OO (1) The securities are held directly by Pyrophyte Acquisition II LLC (the "Sponsor"). The Sponsor is controlled by its managing members Sten Gustafson and Bernard Duroc-Danner (together, the "Managing Members"). The Managing Members have the sole voting and dispositive power of the securities held by the Sponsor. Accordingly, Messrs. Gustafson and Duroc-Danner may be deemed to have beneficial ownership of securities reported herein. (2) The Sponsor owns 7,135,721 Class B Ordinary Shares, par value $0.0001 per share ("Class B Ordinary Shares") of the Issuer, which are convertible for the Issuer's Class A Ordinary Shares par value $0.0001 per share (the "Class A Ordinary Shares") as described under the heading "Description of Securities" in the Issuer's registration statement on Form S-1 (File No. 333-288391) (the "Registration Statement") and have no expiration date. (3) Excludes 5,050,000 Class A Ordinary Shares issuable upon the exercise of 5,050,000 private placement warrants of the Issuer. Each warrant is exercisable to purchase one Class A Ordinary Share at $11.50 per share, subject to adjustment, becomes exercisable beginning 30 days after the completion of the Issuer's initial business combination and expires five years after the completion of the Issuer's initial business combination or earlier upon redemption or liquidation, each as is described under the heading "Description of Securities--Warrants" in the Registration Statement. (4) Based on 20,041,150 Class A Ordinary Shares and 7,225,721 Class B Ordinary Shares outstanding as of November 14, 2025, as reported on the Issuer's Quarterly Report on Form 10-Q (the "Form 10-Q"), filed with the U.S. Securities and Exchange Commission on November 14, 2025. Sten Gustafson X1 7135721.00 0.00 7135721.00 0.00 7135721.00 N 26.2 OO (1) The securities are held directly by Pyrophyte Acquisition II LLC (the "Sponsor"). The Sponsor is controlled by its managing members Sten Gustafson and Bernard Duroc-Danner (together, the "Managing Members"). The Managing Members have the sole voting and dispositive power of the securities held by the Sponsor. Accordingly, Messrs. Gustafson and Duroc-Danner may be deemed to have beneficial ownership of securities reported herein. (2) The Sponsor owns 7,135,721 Class B Ordinary Shares, par value $0.0001 per share ("Class B Ordinary Shares") of the Issuer, which are convertible for the Issuer's Class A Ordinary Shares par value $0.0001 per share (the "Class A Ordinary Shares") as described under the heading "Description of Securities" in the Issuer's registration statement on Form S-1 (File No. 333-288391) (the "Registration Statement") and have no expiration date. (3) Excludes 5,050,000 Class A Ordinary Shares issuable upon the exercise of 5,050,000 private placement warrants of the Issuer. Each warrant is exercisable to purchase one Class A Ordinary Share at $11.50 per share, subject to adjustment, becomes exercisable beginning 30 days after the completion of the Issuer's initial business combination and expires five years after the completion of the Issuer's initial business combination or earlier upon redemption or liquidation, each as is described under the heading "Description of Securities--Warrants" in the Registration Statement. (4) Based on 20,041,150 Class A Ordinary Shares and 7,225,721 Class B Ordinary Shares outstanding as of November 14, 2025, as reported on the Issuer's Quarterly Report on Form 10-Q (the "Form 10-Q"), filed with the U.S. Securities and Exchange Commission on November 14, 2025. Bernard Duroc-Danner X1 7135721.00 0.00 7135721.00 0.00 7135721.00 N 26.2 OO (1) The securities are held directly by Pyrophyte Acquisition II LLC (the "Sponsor"). The Sponsor is controlled by its managing members Sten Gustafson and Bernard Duroc-Danner (together, the "Managing Members"). The Managing Members have the sole voting and dispositive power of the securities held by the Sponsor. Accordingly, Messrs. Gustafson and Duroc-Danner may be deemed to have beneficial ownership of securities reported herein. (2) The Sponsor owns 7,135,721 Class B Ordinary Shares, par value $0.0001 per share ("Class B Ordinary Shares") of the Issuer, which are convertible for the Issuer's Class A Ordinary Shares par value $0.0001 per share (the "Class A Ordinary Shares") as described under the heading "Description of Securities" in the Issuer's registration statement on Form S-1 (File No. 333-288391) (the "Registration Statement") and have no expiration date. (3) Excludes 5,050,000 Class A Ordinary Shares issuable upon the exercise of 5,050,000 private placement warrants of the Issuer. Each warrant is exercisable to purchase one Class A Ordinary Share at $11.50 per share, subject to adjustment, becomes exercisable beginning 30 days after the completion of the Issuer's initial business combination and expires five years after the completion of the Issuer's initial business combination or earlier upon redemption or liquidation, each as is described under the heading "Description of Securities--Warrants" in the Registration Statement. (4) Based on 20,041,150 Class A Ordinary Shares and 7,225,721 Class B Ordinary Shares outstanding as of November 14, 2025, as reported on the Issuer's Quarterly Report on Form 10-Q (the "Form 10-Q"), filed with the U.S. Securities and Exchange Commission on November 14, 2025. Pyrophyte Acquisition Corp. II 3262 Westheimer Road, Suite 706, Houston, Texas 77098 1. Pyrophyte Acquisition II LLC 2. Sten Gustafson 3. Bernard Duroc-Danner 3262 Westheimer Road, Suite 706, Houston, Texas 77098 See response to Item 4 on the cover page. Y See response to Item 9 on the cover page. See response to Item 11 on the cover page. See response to Item 5 on the cover page. See response to Item 6 on the cover page. See response to Item 7 on the cover page. See response to Item 8 on the cover page. Y Y Y Y Y Y Exhibit 99.1 Joint Filer Information, which is incorporated herein by reference and describes in further detail the relationships of the Reporting Persons to the Issuer. Pyrophyte Acquisition II LLC /s/ Sten Gustafson 02/06/2026 Sten Gustafson /s/ Sten Gustafson 02/06/2026 Bernard Duroc-Danner /s/ Bernard Duroc-Danner 02/06/2026