SCHEDULE 13G 0002079295 XXXXXXXX LIVE Class A Ordinary Shares, par value $0.0001 per share 10/28/2025 0002079292 Insight Digital Partners II G4814G105 17 State Street Suite 4000 New York NY 10004 Rule 13d-1(d) Insight Digital Partners Sponsor LLC X1 5540000.00 0.00 5540000.00 0.00 5540000.00 N 24.1 OO (1) The securities are held directly by Insight Digital Partners Sponsor LLC (the "Sponsor"). Michael Singer is the sole managing member of the Sponsor and has voting and investment discretion with respect to the securities held by the Sponsor. (2) The Sponsor owns 5,540,000 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. 333-289728) (the "Registration Statement") and have no expiration date. (3) Excludes 5,540,000 Class A Ordinary Shares issuable upon the exercise of 5,540,000 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 17,250,000 Class A Ordinary Shares and 5,750,000 Class B Ordinary Shares outstanding as of December 8, 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 8, 2025. Michael Singer X1 5540000.00 0.00 5540000.00 0.00 5540000.00 N 24.1 IN (1) The securities are held directly by the Sponsor. Michael Singer is the sole managing member of the Sponsor and has voting and investment discretion with respect to the securities held by the Sponsor. (2) The Sponsor owns 5,540,000 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 5,540,000 Class A Ordinary Shares issuable upon the exercise of 5,540,000 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 17,250,000 Class A Ordinary Shares and 5,750,000 Class B Ordinary Shares outstanding as of December 8, 2025, as reported on the Form 10-Q. Insight Digital Partners II 17 State Street, Suite 4000, New York, New York 10004 1. Insight Digital Partners Sponsor LLC 2. Michael Singer 17 State Street, Suite 4000, New York, New York 10004 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 Filing Agreement, dated as of February 6, 2026 by and between Insight Digital Partners Sponsor LLC and Michael Singer. Insight Digital Partners Sponsor LLC /s/ Michael Singer 02/06/2026 Michael Singer /s/ Michael Singer 02/06/2026