ETRA SCHEDULE 13G: SEC filing
Filed with the SEC on · accession 0001104659-26-120294
ETRA filed a SCHEDULE 13G (schedule 13g) with the SEC on Oct 29, 2026. Westlake BioPartners Fund I, L.P., Westlake BioPartners Fund II, L.P., their respective general partners, and Dr. The stock moved -3.8% by the first close after the filing.
Summary of the filing
Westlake BioPartners Fund I, L.P., Westlake BioPartners Fund II, L.P., their respective general partners, and Dr. Beth C. Seidenberg filed a joint Schedule 13G indicating passive ownership in Electra Therapeutics, Inc. The filing includes a joint filing agreement executed via power of attorney.
Key details
How ETRA stock reacted
Close before
$8.98
Oct 28, 2026
First close after
-3.79%
$8.64
5 trading days
-11.25%
$7.97
Since filing
-13.14%
$7.80
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Click hereFrequently asked questions
What did ETRA file with the SEC on Oct 29, 2026?
ETRA filed a SCHEDULE 13G (SEC filing). Westlake BioPartners Fund I, L.P., Westlake BioPartners Fund II, L.P., their respective general partners, and Dr. Beth C. Seidenberg filed a joint Schedule 13G indicating passive ownership in Electra Therapeutics, Inc. The filing includes a joint filing agreement executed via power of attorney.
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 ETRA stock react to this filing?
ETRA closed at $8.98 before the filing and $8.64 on Oct 29, 2026 (-3.79%). Five trading days later: $7.97 (-11.25%).
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