ASPN SCHEDULE 13G: SEC filing
A Schedule 13G was
Filed with the SEC on · accession 0001493152-26-047542
ASPN filed a SCHEDULE 13G (schedule 13g) with the SEC on Oct 19, 2026. A Schedule 13G was filed regarding Aspen Aerogels Inc (ASPN), indicating a passive ownership position by an institutional or other holder. The stock moved +2.5% by the first close after the filing.
Summary of the filing
A Schedule 13G was filed regarding Aspen Aerogels Inc (ASPN), indicating a passive ownership position by an institutional or other holder. The filing text provided contains only the EDGAR directory listing and no substantive ownership details.
Key details
How ASPN stock reacted
Close before
$5.19
Oct 16, 2026
First close after
+2.50%
$5.32
5 trading days
+6.36%
$5.52
Since filing
-5.39%
$4.91
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Click hereFrequently asked questions
What did ASPN file with the SEC on Oct 19, 2026?
ASPN filed a SCHEDULE 13G (SEC filing). A Schedule 13G was filed regarding Aspen Aerogels Inc (ASPN), indicating a passive ownership position by an institutional or other holder. The filing text provided contains only the EDGAR directory listing and no substantive ownership details.
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 ASPN stock react to this filing?
ASPN closed at $5.19 before the filing and $5.32 on Oct 19, 2026 (+2.50%). Five trading days later: $5.52 (+6.36%).
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