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Taxonomy & unit
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dei: shares
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Description
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Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.
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Summary
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Upstream Bio, Inc. quarterly Entity Common Stock, Shares Outstanding history and change rate from Q3 2024 to Q3 2025.
- Upstream Bio, Inc. Entity Common Stock, Shares Outstanding for the quarter ending November 3, 2025 was 54M shares, a 0.83% increase year-over-year.
Entity Common Stock, Shares Outstanding, Quarterly (shares)
Entity Common Stock, Shares Outstanding, YoY Quarterly Change (%)