TECX SCHEDULE 13G/A: SEC filing
An institutional holder
Filed with the SEC on · accession 0001716774-26-000024
TECX filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Oct 29, 2026. An institutional holder filed an amended Schedule 13G regarding its ownership position in Tectonic Therapeutic, Inc. (TECX). The stock moved -0.3% by the first close after the filing.
Summary of the filing
An institutional holder filed an amended Schedule 13G regarding its ownership position in Tectonic Therapeutic, Inc. (TECX). The filing indicates a change in the holder's passive ownership stake.
Key details
How TECX stock reacted
Close before
$20.56
Oct 28, 2026
First close after
-0.29%
$20.50
5 trading days
-1.26%
$20.30
Since filing
-5.54%
$19.42
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Click hereFrequently asked questions
What did TECX file with the SEC on Oct 29, 2026?
TECX filed a SCHEDULE 13G/A (SEC filing). An institutional holder filed an amended Schedule 13G regarding its ownership position in Tectonic Therapeutic, Inc. (TECX). The filing indicates a change in the holder's passive ownership stake.
How do I read a SCHEDULE 13G/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 13G/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).
How did TECX stock react to this filing?
TECX closed at $20.56 before the filing and $20.50 on Oct 29, 2026 (-0.29%). Five trading days later: $20.30 (-1.26%).
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