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Taxonomy & unit
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us-gaap: shares
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Description
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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.
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Summary
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Upstream Bio, Inc. quarterly Common Stock, Shares, Outstanding history and change rate from Q4 2023 to Q3 2025.
- Upstream Bio, Inc. Common Stock, Shares, Outstanding for the quarter ending September 30, 2025 was 54M shares, a 1685% increase year-over-year.
Common Stock, Shares, Outstanding, Quarterly (shares)
Common Stock, Shares, Outstanding, YoY Quarterly Change (%)