Growth Metrics

Spero Therapeutics (SPRO) Shares Outstanding (Diluted Average) (2021 - 2025)

Historic Shares Outstanding (Diluted Average) for Spero Therapeutics (SPRO) over the last 5 years, with Q3 2025 value amounting to $56.3 million.

  • Spero Therapeutics' Shares Outstanding (Diluted Average) rose 398.33% to $56.3 million in Q3 2025 from the same period last year, while for Sep 2025 it was $56.3 million, marking a year-over-year increase of 398.33%. This contributed to the annual value of $54.0 million for FY2024, which is 197.94% up from last year.
  • Latest data reveals that Spero Therapeutics reported Shares Outstanding (Diluted Average) of $56.3 million as of Q3 2025, which was up 398.33% from $56.0 million recorded in Q2 2025.
  • In the past 5 years, Spero Therapeutics' Shares Outstanding (Diluted Average) ranged from a high of $56.3 million in Q3 2025 and a low of $29.7 million during Q2 2021
  • Over the past 5 years, Spero Therapeutics' median Shares Outstanding (Diluted Average) value was $52.6 million (recorded in 2023), while the average stood at $45.9 million.
  • Per our database at Business Quant, Spero Therapeutics' Shares Outstanding (Diluted Average) surged by 6109.26% in 2023 and then surged by 189.81% in 2024.
  • Over the past 5 years, Spero Therapeutics' Shares Outstanding (Diluted Average) (Quarter) stood at $30.9 million in 2021, then increased by 21.65% to $37.6 million in 2022, then skyrocketed by 40.98% to $53.0 million in 2023, then rose by 1.98% to $54.0 million in 2024, then increased by 4.15% to $56.3 million in 2025.
  • Its Shares Outstanding (Diluted Average) stands at $56.3 million for Q3 2025, versus $56.0 million for Q2 2025 and $55.4 million for Q1 2025.