CYCN SCHEDULE 13G: SEC filing
A Schedule 13G filing was
Filed with the SEC on · accession 0001172661-26-003423
CYCN filed a SCHEDULE 13G (schedule 13g) with the SEC on Aug 14, 2026. A Schedule 13G filing was submitted regarding Cyclerion Therapeutics, Inc. (CYCN), indicating a passive ownership position by a reporting holder. The stock moved -3.1% by the first close after the filing.
Summary of the filing
A Schedule 13G filing was submitted regarding Cyclerion Therapeutics, Inc. (CYCN), indicating a passive ownership position by a reporting holder. The filing text provided contains only EDGAR directory listing metadata and no substantive ownership details.
Key details
How CYCN stock reacted
Close before
$27.37
Aug 13, 2026
First close after
-3.07%
$26.53
5 trading days
+4.09%
$28.49
Since filing
-14.07%
$23.52
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Click hereFrequently asked questions
What did CYCN file with the SEC on Aug 14, 2026?
CYCN filed a SCHEDULE 13G (SEC filing). A Schedule 13G filing was submitted regarding Cyclerion Therapeutics, Inc. (CYCN), indicating a passive ownership position by a reporting holder. The filing text provided contains only EDGAR directory listing metadata 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 CYCN stock react to this filing?
CYCN closed at $27.37 before the filing and $26.53 on Aug 14, 2026 (-3.07%). Five trading days later: $28.49 (+4.09%).
Other CYCN SEC filings
- 8-K · SEC filingNov 5, 2026
- 10-Q · SEC filingNov 5, 2026
- DEF 14A · SEC filingOct 15, 2026
- SCHEDULE 13G/A · SEC filingOct 15, 2026
- SCHEDULE 13G/A · SEC filingOct 7, 2026
- SCHEDULE 13G · SEC filingSep 16, 2026
- 8-K · AcquisitionSep 11, 2026
- SCHEDULE 13D · Activist campaignSep 11, 2026
- SCHEDULE 13G · SEC filingAug 14, 2026
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