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Iron Mountain (IRM) Shares Outstanding (Weighted Average) (2016 - 2025)

Iron Mountain's Shares Outstanding (Weighted Average) history spans 16 years, with the latest figure at $295.4 million for Q4 2025.

  • For Q4 2025, Shares Outstanding (Weighted Average) rose 0.69% year-over-year to $295.4 million; the TTM value through Dec 2025 reached $295.4 million, up 0.69%, while the annual FY2025 figure was $295.4 million, 0.69% up from the prior year.
  • Shares Outstanding (Weighted Average) for Q4 2025 was $295.4 million at Iron Mountain, roughly flat from $295.8 million in the prior quarter.
  • Across five years, Shares Outstanding (Weighted Average) topped out at $295.8 million in Q3 2025 and bottomed at $288.8 million in Q1 2021.
  • The 5-year median for Shares Outstanding (Weighted Average) is $291.7 million (2023), against an average of $292.0 million.
  • The largest annual shift saw Shares Outstanding (Weighted Average) grew 0.3% in 2023 before it grew 0.74% in 2025.
  • A 5-year view of Shares Outstanding (Weighted Average) shows it stood at $289.5 million in 2021, then increased by 0.47% to $290.8 million in 2022, then increased by 0.39% to $291.9 million in 2023, then rose by 0.49% to $293.4 million in 2024, then increased by 0.69% to $295.4 million in 2025.
  • Per Business Quant, the three most recent readings for IRM's Shares Outstanding (Weighted Average) are $295.4 million (Q4 2025), $295.8 million (Q3 2025), and $294.9 million (Q2 2025).