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Upstream Bio (UPB) Shares Outstanding (Weighted Average) (2023 - 2025)

Upstream Bio has reported Shares Outstanding (Weighted Average) over the past 3 years, most recently at $53.9 million for Q4 2025.

  • Quarterly results put Shares Outstanding (Weighted Average) at $53.9 million for Q4 2025, up 293.59% from a year ago — trailing twelve months through Dec 2025 was $53.9 million (up 293.59% YoY), and the annual figure for FY2025 was $53.9 million, up 293.59%.
  • Shares Outstanding (Weighted Average) for Q4 2025 was $53.9 million at Upstream Bio, roughly flat from $53.9 million in the prior quarter.
  • Over the last five years, Shares Outstanding (Weighted Average) for UPB hit a ceiling of $53.9 million in Q3 2025 and a floor of $2.9 million in Q3 2023.
  • Median Shares Outstanding (Weighted Average) over the past 3 years was $8.3 million (2024), compared with a mean of $24.4 million.
  • Biggest five-year swings in Shares Outstanding (Weighted Average): grew 2.19% in 2024 and later soared 1692.18% in 2025.
  • Upstream Bio's Shares Outstanding (Weighted Average) stood at $3.0 million in 2023, then soared by 363.22% to $13.7 million in 2024, then surged by 293.59% to $53.9 million in 2025.
  • The last three reported values for Shares Outstanding (Weighted Average) were $53.9 million (Q4 2025), $53.9 million (Q3 2025), and $53.8 million (Q2 2025) per Business Quant data.