SPACSphere Acquisition Corp.: MIZUHO FINANCIAL GROUP INC amends Schedule 13G stake filing

Mizuho Financial Group Inc. filed an amended Schedule 13G with the SEC (accession 0001104659-26-125826) updating its beneficial ownership stake in SPACSphere Acquisition Corp. The filing signals a change in the Japanese bank's passive position in the blank-check company, though the amended document did not disclose a revised share count or percentage in the headline details. Schedule 13G amendments are typically triggered when ownership crosses the 5% threshold or when a holder's stake shifts by more than 5% of the class, making the update relevant to investors tracking SPAC sponsorship and institutional backing. The disclosure comes as SPACSphere continues its search for a merger target, and the size and direction of Mizuho's revised holding will be a focal point. Watchers will look to the full filing for exact share figures and to any subsequent 13G amendments for signs of further accumulation or reduction.