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

Upstream Bio (UPB) has 3 years of Shares Outstanding data on record, last reported at $54.0 million in Q3 2025.

  • For Q3 2025, Shares Outstanding rose 1684.84% year-over-year to $54.0 million; the TTM value through Sep 2025 reached $54.0 million, up 1684.84%, while the annual FY2024 figure was $53.6 million, 1691.27% up from the prior year.
  • Shares Outstanding reached $54.0 million in Q3 2025 per UPB's latest filing, roughly flat from $53.8 million in the prior quarter.
  • Across five years, Shares Outstanding topped out at $54.0 million in Q3 2025 and bottomed at $3.0 million in Q3 2023.
  • Average Shares Outstanding over 3 years is $25.6 million, with a median of $3.0 million recorded in 2024.
  • The widest YoY moves for Shares Outstanding: up 1691.27% in 2024, down 1.82% in 2024.
  • A 3-year view of Shares Outstanding shows it stood at $3.0 million in 2023, then skyrocketed by 1691.27% to $53.6 million in 2024, then increased by 0.74% to $54.0 million in 2025.
  • Per Business Quant database, its latest 3 readings for Shares Outstanding were $54.0 million in Q3 2025, $53.8 million in Q2 2025, and $53.6 million in Q1 2025.