MCAH SCHEDULE 13G/A: SEC filing

Mizuho Financial Group Inc.

Filed with the SEC on Nov 12, 2026 · accession 0001104659-26-125850

MCAH filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Nov 12, 2026. Mizuho Financial Group Inc. filed an amended Schedule 13G/A reporting beneficial ownership of 689,011 common shares, or 8.0%, of Mountain Crest Acquisition 6 Corp. as of September 30, 2026.

Summary of the filing

Mizuho Financial Group Inc. filed an amended Schedule 13G/A reporting beneficial ownership of 689,011 common shares, or 8.0%, of Mountain Crest Acquisition 6 Corp. as of September 30, 2026. The filing is a passive investment disclosure under Rule 13d-1(b), with Mizuho Securities USA LLC as the direct holder.

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Key details

Common shares beneficially owned$689K

Reporting beneficial owner (parent holding company)Mizuho Financial Group, Inc.

Direct holder of the securities; wholly-owned subsidiary of mizuho financial groupMizuho Securities USA LLC

May be deemed indirect beneficial ownerMizuho Bank, Ltd.

May be deemed indirect beneficial ownerMizuho Americas LLC

Issuer of the securitiesMountain Crest Acquisition 6 Corp.

Managing director, global corporate function coordination department, mizuho financial group, inc.Takahiro Katsura

Senior managing corporate executive, head of global corporate & investment banking, mizuho financial group, inc.Shuji Matsuura

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Frequently asked questions

What did MCAH file with the SEC on Nov 12, 2026?

MCAH filed a SCHEDULE 13G/A (SEC filing). Mizuho Financial Group Inc. filed an amended Schedule 13G/A reporting beneficial ownership of 689,011 common shares, or 8.0%, of Mountain Crest Acquisition 6 Corp. as of September 30, 2026. The filing is a passive investment disclosure under Rule 13d-1(b), with Mizuho Securities USA LLC as the direct holder.

How do I read a SCHEDULE 13G/A?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13G/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).

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