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

Iron Mountain (IRM) has 18 years of Shares Outstanding (Entity) data on file, last reported at $297.5 million in Q1 2026.

• For the quarter ending Q1 2026, Shares Outstanding (Entity) rose 0.85% year-over-year to $297.5 million; the trailing twelve-month figure through Mar 2026 stood at $297.5 million (up 0.85% YoY), and the FY2025 full-year result was $295.8 million, up 0.75% from the prior year.
• Shares Outstanding (Entity) rose to $297.5 million in Q1 2026, from $295.8 million in the prior quarter.
• In the past five years, Shares Outstanding (Entity) ranged from a high of $297.5 million in Q1 2026 to a low of $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).
• Across the five-year window, Shares Outstanding (Entity) climbed 0.36% in 2023 and grew 0.85% in 2026, its largest moves.
• Tracing IRM's Shares Outstanding (Entity) over 5 years: stood at $290.8 million in 2022, then climbed by 0.45% to $292.1 million in 2023, then grew by 0.5% to $293.6 million in 2024, then advanced by 0.75% to $295.8 million in 2025, then climbed by 0.57% to $297.5 million in 2026.
• Business Quant data shows IRM's Shares Outstanding (Entity) at $297.5 million in Q1 2026, $295.8 million in Q4 2025, and $295.5 million in Q3 2025.