SCHEDULE 13G/A 0001335730 XXXXXXXX LIVE 2 Common Shares 03/31/2025 0002000775 Black Hawk Acquisition Corporation G1148A101 4125 BLACKHAWK PLAZA CIRCLE SUITE 166 DANVILLE CA 94506 Rule 13d-1(b) Mizuho Financial Group, Inc. b M0 767000 0 767000 0 767000 N 8.6 FI Mizuho Financial Group, Inc., Mizuho Bank, Ltd. and Mizuho Americas LLC may be deemed to be indirect beneficial owners of said equity securities directly held by Mizuho Securities USA LLC which is their wholly-owned subsidiary. Black Hawk Acquisition Corporation 4125 BLACKHAWK PLAZA CIRCLE, SUITE 166, DANVILLE, CA, 94506 Mizuho Financial Group, Inc. 1-5-5, Otemachi, Chiyoda-ku, Tokyo, 100-8176, Japan Japan N FI Parent Holding Company 767,000 8.6 767,000 0 767,000 0 Y Y N See Exhibit A Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. By signing below I certify that, to the best of my knowledge and belief, the foreign regulatory scheme applicable to Parent Holding Company is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D. Mizuho Financial Group, Inc. /s/ Takahiro Katsura 05/13/2025