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Upstream Bio (UPB) Shares Outstanding: 2023-2025

Historic Shares Outstanding for Upstream Bio (UPB) over the last 2 years, with Sep 2025 value amounting to $54.0 million.

  • Upstream Bio's Shares Outstanding rose 1684.84% to $54.0 million in Q3 2025 from the same period last year, while for Sep 2025 it was $54.0 million, marking a year-over-year increase of 1684.84%. This contributed to the annual value of $53.6 million for FY2024, which is 1691.27% up from last year.
  • Per Upstream Bio's latest filing, its Shares Outstanding stood at $54.0 million for Q3 2025, which was up 0.37% from $53.8 million recorded in Q2 2025.
  • Upstream Bio's Shares Outstanding's 5-year high stood at $54.0 million during Q3 2025, with a 5-year trough of $3.0 million in Q3 2023.
  • For the 3-year period, Upstream Bio's Shares Outstanding averaged around $25.6 million, with its median value being $3.0 million (2024).
  • Data for Upstream Bio's Shares Outstanding shows a peak YoY skyrocketed of 1,691.27% (in 2024) over the last 5 years.
  • Upstream Bio's Shares Outstanding (Quarterly) stood at $3.0 million in 2023, then spiked by 1,691.27% to $53.6 million in 2024, then surged by 1,684.84% to $54.0 million in 2025.
  • Its Shares Outstanding stands at $54.0 million for Q3 2025, versus $53.8 million for Q2 2025 and $53.6 million for Q1 2025.