SPTX SCHEDULE 13G: SEC filing
A Schedule 13G was
Filed with the SEC on · accession 0001193125-26-352401
SPTX filed a SCHEDULE 13G (schedule 13g) with the SEC on Aug 14, 2026. A Schedule 13G was filed regarding Seaport Therapeutics, Inc. (SPTX), indicating a passive ownership position by a reporting holder. The stock moved +2.2% by the first close after the filing.
Summary of the filing
A Schedule 13G was filed regarding Seaport Therapeutics, Inc. (SPTX), indicating a passive ownership position by a reporting holder. The filing text provided is only the EDGAR directory listing and does not disclose the holder's identity, ownership percentage, or share count.
Key details
How SPTX stock reacted
Close before
$23.71
Aug 13, 2026
First close after
+2.15%
$24.22
5 trading days
+1.77%
$24.13
Since filing
-9.32%
$21.50
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Click hereFrequently asked questions
What did SPTX file with the SEC on Aug 14, 2026?
SPTX filed a SCHEDULE 13G (SEC filing). A Schedule 13G was filed regarding Seaport Therapeutics, Inc. (SPTX), indicating a passive ownership position by a reporting holder. The filing text provided is only the EDGAR directory listing and does not disclose the holder's identity, ownership percentage, or share count.
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 SPTX stock react to this filing?
SPTX closed at $23.71 before the filing and $24.22 on Aug 14, 2026 (+2.15%). Five trading days later: $24.13 (+1.77%).
Other SPTX SEC filings
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