Iron Mountain (IRM) Shares Outstanding (2009 - 2026)

Iron Mountain has reported Shares Outstanding (Entity) for 18 years, with the latest figure at $297.5 million in Q1 2026.

• Quarterly Shares Outstanding (Entity) rose 0.85% year-over-year to $297.5 million in Q1 2026, while the trailing twelve-month figure through Mar 2026 was $297.5 million (up 0.85% YoY) and the FY2025 annual result came in at $295.8 million, up 0.75% from the prior year.
• Shares Outstanding (Entity) rose to $297.5 million in Q1 2026 per IRM's latest filing, from $295.8 million in the prior quarter.
• Over five years, Shares Outstanding (Entity) peaked at $297.5 million in Q1 2026 and troughed at $290.6 million in Q1 2022.
• A 5-year average of $293.1 million and a median of $293.1 million in 2024 frame the typical range for Shares Outstanding (Entity).
• The sharpest annual moves came in 2023 and 2026: Shares Outstanding (Entity) increased 0.36% in 2023, then rose 0.85% in 2026.
• Over 5 years, Shares Outstanding (Entity) stood at $290.8 million in 2022, then rose by 0.45% to $292.1 million in 2023, then gained by 0.5% to $293.6 million in 2024, then increased by 0.75% to $295.8 million in 2025, then rose by 0.57% to $297.5 million in 2026.
• According to Business Quant data, Shares Outstanding (Entity) over the past three periods registered $297.5 million, $295.8 million, and $295.5 million for Q1 2026, Q4 2025, and Q3 2025 respectively.