UPB SCHEDULE 13G/A: SEC filing
Decheng Capital entities and manager Xiangmin Cui
Filed with the SEC on · accession 0001834150-26-000006
UPB filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Oct 29, 2026. A report the company filed with the SEC (the US market regulator). The stock moved +9.7% by the first close after the filing.
Summary of the filing
Decheng Capital entities and manager Xiangmin Cui filed a joint filing agreement as an amendment to their Schedule 13G regarding their position in Upstream Bio, Inc. common stock.
Key details
How UPB stock reacted
Close before
$2.98
Oct 28, 2026
First close after
+9.73%
$3.27
5 trading days
+24.16%
$3.70
Since filing
+7.72%
$3.21
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Click hereFrequently asked questions
What did UPB file with the SEC on Oct 29, 2026?
UPB filed a SCHEDULE 13G/A (SEC filing). Decheng Capital entities and manager Xiangmin Cui filed a joint filing agreement as an amendment to their Schedule 13G regarding their position in Upstream Bio, Inc. common stock.
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 UPB stock react to this filing?
UPB closed at $2.98 before the filing and $3.27 on Oct 29, 2026 (+9.73%). Five trading days later: $3.70 (+24.16%).
Other UPB SEC filings
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