SCHEDULE 13G 0002086187 XXXXXXXX LIVE Class A Ordinary Shares, par value $0.0001 per share 10/27/2025 0002079253 Apex Treasury Corporation G04104108 2035 Regatta Drive Vero Beach FL 32963 Rule 13d-1(d) Apex Treasury Sponsor LLC X1 11150000.00 0.00 11150000.00 0.00 11150000.00 N 24.3 OO (1) The securities are held directly by Apex Treasury Sponsor LLC (the "Sponsor"). Hugh Cochrane and Ajmal Rahman are the managing members of the Sponsor and have voting and investment discretion with respect to the securities held by the Sponsor. (2) The Sponsor owns 11,150,000 Class B Ordinary Shares, par value $0.0001 per share, of the Issuer (the "Class B Ordinary Shares"), 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--Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-289485) (the "Registration Statement") and have no expiration date. (3) Excludes 8,894,000 Class A Ordinary Shares issuable upon the exercise of 8,894,000 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 34,470,000 Class A Ordinary Shares and 11,490,000 Class B Ordinary Shares outstanding as of December 5, 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 December 5, 2025. Hugh Cochrane X1 11150000.00 0.00 11150000.00 0.00 11150000.00 N 24.3 IN (1) The securities are held directly by the Sponsor. Hugh Cochrane and Ajmal Rahman are the managing members of the Sponsor and have voting and investment discretion with respect to the securities held by the Sponsor. (2) The Sponsor owns 11,150,000 Class B Ordinary Shares of the Issuer, which are convertible for the Issuer's Class A Ordinary Shares as described under the heading "Description of Securities--Founder Shares" in the Registration Statement and have no expiration date. (3) Excludes 8,894,000 Class A Ordinary Shares issuable upon the exercise of 8,894,000 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 34,470,000 Class A Ordinary Shares and 11,490,000 Class B Ordinary Shares outstanding as of December 5, 2025, as reported on the Form 10-Q. Ajmal Rahman X0 11150000.00 0.00 11150000.00 0.00 11150000.00 N 24.3 IN (1) The securities are held directly by the Sponsor. Hugh Cochrane and Ajmal Rahman are the managing members of the Sponsor and have voting and investment discretion with respect to the securities held by the Sponsor. (2) The Sponsor owns 11,150,000 Class B Ordinary Shares of the Issuer, which are convertible for the Issuer's Class A Ordinary Shares as described under the heading "Description of Securities--Founder Shares" in the Registration Statement and have no expiration date. (3) Excludes 8,894,000 Class A Ordinary Shares issuable upon the exercise of 8,894,000 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 34,470,000 Class A Ordinary Shares and 11,490,000 Class B Ordinary Shares outstanding as of December 5, 2025, as reported on the Form 10-Q. Apex Treasury Corporation 2035 Regatta Drive, Vero Beach, Florida 32963 1. Apex Treasury Sponsor LLC 2. Hugh Cochrane 3. Ajmal Rahman 2035 Regatta Drive, Vero Beach, Florida 32963 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 1 Joint Filing Agreement, dated as of February 5, 2026 by and among Apex Treasury Sponsor LLC, Hugh Cochrane and Ajmal Rahman. Apex Treasury Sponsor LLC /s/ Hugh Cochrane 02/05/2026 /s/ Ajmal Rahman 02/05/2026 Hugh Cochrane /s/ Hugh Cochrane 02/05/2026 Ajmal Rahman /s/ Ajmal Rahman 02/05/2026