WSTN SCHEDULE 13G: SEC filing

Mizuho Financial Group Inc.

Filed with the SEC on Nov 12, 2026 · accession 0001104659-26-125858

WSTN filed a SCHEDULE 13G (schedule 13g) with the SEC on Nov 12, 2026. Mizuho Financial Group Inc. filed a Schedule 13G disclosing beneficial ownership of 490,260 common shares, or 8.1%, of Westin Acquisition Corp as of September 30, 2026.

Summary of the filing

Mizuho Financial Group Inc. filed a Schedule 13G disclosing beneficial ownership of 490,260 common shares, or 8.1%, of Westin Acquisition Corp as of September 30, 2026. The filing is a passive investment disclosure under Rule 13d-1(b), with the shares held indirectly through Mizuho Securities USA LLC.

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Key details

Common shares beneficially owned$490K

Percentage of class beneficially ownedPCT 8

Filer / beneficial owner of 8.1% of westin acquisition corp common sharesMizuho Financial Group, Inc.

Subject company / issuerWestin Acquisition Corp

Wholly-owned subsidiary of mizuho financial group that directly holds the sharesMizuho Securities USA LLC

Subsidiary that may be deemed an indirect beneficial ownerMizuho Bank, Ltd.

Subsidiary that may be deemed an indirect beneficial ownerMizuho Americas LLC

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

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Frequently asked questions

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

WSTN filed a SCHEDULE 13G (SEC filing). Mizuho Financial Group Inc. filed a Schedule 13G disclosing beneficial ownership of 490,260 common shares, or 8.1%, of Westin Acquisition Corp as of September 30, 2026. The filing is a passive investment disclosure under Rule 13d-1(b), with the shares held indirectly through Mizuho Securities USA LLC.

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).

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