Weighted Average Number of Shares Outstanding, Basic of Upstream Bio, Inc. from 30 Sep 2023 to 30 Sep 2025

Taxonomy & unit
us-gaap: shares
Description
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.
Summary
Upstream Bio, Inc. quarterly and annual Weighted Average Number of Shares Outstanding, Basic in shares history and change rate from 30 Sep 2023 to 30 Sep 2025.
  • Upstream Bio, Inc. Weighted Average Number of Shares Outstanding, Basic for the quarter ending 30 Sep 2025 was 53,930,946, a 1684% increase year-over-year.
  • Upstream Bio, Inc. annual Weighted Average Number of Shares Outstanding, Basic for 2024 was 13,682,326, a 363% increase from 2023.
Source SEC data
View on sec.gov
Weighted Average Number of Shares Outstanding, Basic, Quarterly (shares)
Weighted Average Number of Shares Outstanding, Basic, YoY Quarterly Change (%)
Weighted Average Number of Shares Outstanding, Basic, Annual (shares)
Weighted Average Number of Shares Outstanding, Basic, YoY Annual Change (%)

Upstream Bio, Inc. Quarterly Weighted Average Number of Shares Outstanding, Basic (shares)

Period TTM Value Value YoY Chg Change % Start Date End Date Report Filed Fiscal Year Fiscal Period
Q3 2025 53,930,946 +50,907,791 +1684% 01 Jul 2025 30 Sep 2025 10-Q 05 Nov 2025 2025 Q3
Q2 2025 53,770,868 +50,762,061 +1687% 01 Apr 2025 30 Jun 2025 10-Q 06 Aug 2025 2025 Q2
Q1 2025 53,617,723 +50,622,116 +1690% 01 Jan 2025 31 Mar 2025 10-Q 06 May 2025 2025 Q1
Q4 2024 13,682,326 01 Oct 2024 31 Dec 2024 10-K 12 Mar 2025 2024 FY
Q3 2024 3,023,155 +64,428 +2.2% 01 Jul 2024 30 Sep 2024 10-Q 05 Nov 2025 2025 Q3
Q2 2024 3,008,807 01 Apr 2024 30 Jun 2024 10-Q 06 Aug 2025 2025 Q2
Q1 2024 2,995,607 01 Jan 2024 31 Mar 2024 10-Q 06 May 2025 2025 Q1
Q3 2023 2,958,727 01 Jul 2023 30 Sep 2023 10-Q 07 Nov 2024 2024 Q3

Upstream Bio, Inc. Annual Weighted Average Number of Shares Outstanding, Basic (shares)

Period Value YoY Chg Change % Start Date End Date Report Filed Fiscal Year Fiscal Period
2024 13,682,326 +10,728,570 +363% 01 Jan 2024 31 Dec 2024 10-K 12 Mar 2025 2024 FY
2023 2,953,756 01 Jan 2023 31 Dec 2023 10-K 12 Mar 2025 2024 FY
* An asterisk sign (*) next to the value indicates that the value is likely invalid.