MCAH SCHEDULE 13G: SEC filing

Mizuho Financial Group and its subsidiaries

Filed with the SEC on Aug 13, 2026 · accession 0001104659-26-095469

MCAH filed a SCHEDULE 13G (schedule 13g) with the SEC on Aug 13, 2026. Mizuho Financial Group and its subsidiaries filed a Schedule 13G exhibit consisting of powers of attorney authorizing Takahiro Katsura to execute and file Form 13G on their behalf regarding their holdings in Mountain Crest Acquisition 6 Corp. The filing discloses no change in ownership stake or… The stock moved +0.1% by the first close after the filing.

Summary of the filing

Mizuho Financial Group and its subsidiaries filed a Schedule 13G exhibit consisting of powers of attorney authorizing Takahiro Katsura to execute and file Form 13G on their behalf regarding their holdings in Mountain Crest Acquisition 6 Corp. The filing discloses no change in ownership stake or intent.

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Key details

Filing person / beneficial ownerMizuho Financial Group, Inc.

Subsidiary of filing personMizuho Bank, Ltd.

Subsidiary / parent holding company of filing personMizuho Americas LLC

Subsidiary / registered broker-dealer of filing personMizuho Securities USA LLC

Issuer of securities heldMountain Crest Acquisition 6 Corp.

Managing director, head of global branches & subsidiaries coordination office, mizuho financial groupTakahiro Katsura

Senior managing corporate executive, head of global corporate & investment banking, mizuho financial groupShuji Matsuura

Chief legal officer, mizuho americas llc; managing director, general counsel, mizuho securities usa llcAdam Hopkins

How MCAH stock reacted

Close before

$9.97

Aug 10, 2026

First close after

+0.10%

$9.98

5 trading days

+0.20%

$9.99

Since filing

+1.40%

$10.11

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Frequently asked questions

What did MCAH file with the SEC on Aug 13, 2026?

MCAH filed a SCHEDULE 13G (SEC filing). Mizuho Financial Group and its subsidiaries filed a Schedule 13G exhibit consisting of powers of attorney authorizing Takahiro Katsura to execute and file Form 13G on their behalf regarding their holdings in Mountain Crest Acquisition 6 Corp. The filing discloses no change in ownership stake or intent.

How do I read a SCHEDULE 13G?

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 (schedule 13g): A report the company filed with the SEC (the US market regulator).

How did MCAH stock react to this filing?

MCAH closed at $9.97 before the filing and $9.98 on Aug 13, 2026 (+0.10%). Five trading days later: $9.99 (+0.20%).

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