GOSS SCHEDULE 13D/A: Insider sale planned
Filed with the SEC on · accession 0001104659-26-120319
GOSS filed a SCHEDULE 13D/A (schedule 13d/a) with the SEC on Oct 29, 2026. A report the company filed with the SEC (the US market regulator). The stock moved +0.0% by the first close after the filing.
Summary of the filing
Cogence and Valence, reporting persons under a Schedule 13D/A for Gossamer Bio, sold numerous small lots of common shares between October 9 and October 29, 2026, at prices ranging from approximately $8.37 to $11.00 per share.
Key details
How GOSS stock reacted
Close before
$10.69
Oct 28, 2026
First close after
+0.00%
$10.69
5 trading days
-6.92%
$9.95
Since filing
-8.61%
$9.77
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Click hereFrequently asked questions
What did GOSS file with the SEC on Oct 29, 2026?
GOSS filed a SCHEDULE 13D/A (Insider sale planned). Cogence and Valence, reporting persons under a Schedule 13D/A for Gossamer Bio, sold numerous small lots of common shares between October 9 and October 29, 2026, at prices ranging from approximately $8.37 to $11.00 per share.
How do I read a SCHEDULE 13D/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 13D/A (schedule 13d/a): A report the company filed with the SEC (the US market regulator).
How did GOSS stock react to this filing?
GOSS closed at $10.69 before the filing and $10.69 on Oct 29, 2026 (+0.00%). Five trading days later: $9.95 (-6.92%).
Other GOSS SEC filings
- SCHEDULE 13G · SEC filingNov 6, 2026
- SCHEDULE 13G/A · SEC filingNov 6, 2026
- 8-K · SEC filingOct 28, 2026
- SCHEDULE 13D/A · Insider sale plannedOct 8, 2026
- 8-K · Delisting noticeSep 28, 2026
- SCHEDULE 13D/A · Insider sale plannedSep 28, 2026
- 8-K · Fda approvalSep 23, 2026
- DEF 14A · Board changeSep 16, 2026
- 8-K · Board changeSep 16, 2026
- 8-K · Stock splitSep 11, 2026
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