MIZUHO FINANCIAL GROUP INC - 31 Dec 2025 SCHEDULE 13G Report for Quantumsphere Acquisition Corporation Common Shares (QUMS)

Filing Manager: MIZUHO FINANCIAL GROUP INC
Reporting Manager: Mizuho Financial Group, Inc.
Security: Quantumsphere Acquisition Corporation Common Shares
Symbol: QUMS
Shares outstanding: 11,398,190 shares
Disclosed Ownership: 718,086 shares
Ownership: 6.3%
Form type: SCHEDULE 13G
Filing time: 12 Feb 2026, 06:54:30 UTC
Date of event: 31 Dec 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
Mizuho Financial Group, Inc.	6.3%	718,086	718,086	0	/s/ Takahiro Katsura	Takahiro Katsura, Managing Director, Global Corporate Function Coordination Department