QSEA SCHEDULE 13G/A: SEC filing
Filed with the SEC on · accession 0001104659-26-095334
QSEA filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Aug 13, 2026. Mizuho Financial Group and its subsidiaries (Mizuho Bank, Mizuho Americas LLC, Mizuho Securities USA LLC) filed a Schedule 13G/A amendment regarding their holdings in Quartzsea Acquisition Corp, accompanied by powers of attorney authorizing Takahiro Katsura to execute and file Form 13G on their… The stock moved -0.3% by the first close after the filing.
Summary of the filing
Mizuho Financial Group and its subsidiaries (Mizuho Bank, Mizuho Americas LLC, Mizuho Securities USA LLC) filed a Schedule 13G/A amendment regarding their holdings in Quartzsea Acquisition Corp, accompanied by powers of attorney authorizing Takahiro Katsura to execute and file Form 13G on their behalf.
Key details
How QSEA stock reacted
Close before
$10.65
Aug 7, 2026
First close after
-0.28%
$10.62
5 trading days
+0.00%
$10.65
Since filing
+1.03%
$10.76
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What did QSEA file with the SEC on Aug 13, 2026?
QSEA filed a SCHEDULE 13G/A (SEC filing). Mizuho Financial Group and its subsidiaries (Mizuho Bank, Mizuho Americas LLC, Mizuho Securities USA LLC) filed a Schedule 13G/A amendment regarding their holdings in Quartzsea Acquisition Corp, accompanied by powers of attorney authorizing Takahiro Katsura to execute and file Form 13G on their behalf.
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).
How did QSEA stock react to this filing?
QSEA closed at $10.65 before the filing and $10.62 on Aug 18, 2026 (-0.28%). Five trading days later: $10.65 (+0.00%).
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