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Taxonomy & unit
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us-gaap: shares
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Description
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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.
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Summary
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Upstream Bio, Inc. quarterly Preferred Stock, Shares Outstanding history and change rate from Q4 2023 to Q3 2025.
- Upstream Bio, Inc. Preferred Stock, Shares Outstanding for the quarter ending September 30, 2025 was 0 shares.
Preferred Stock, Shares Outstanding, Quarterly (shares)