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

Iron Mountain's Shares Outstanding (Weighted Average) history runs 18 years deep, the most recent figure standing at $296.8 million for Q1 2026.

• In Q1 2026, Shares Outstanding (Weighted Average) rose 0.79% year-over-year to $296.8 million; the TTM figure through Mar 2026 stood at $296.8 million (up 0.79% YoY), while the FY2025 annual figure was $295.4 million, up 0.69% from the prior year.
• Shares Outstanding (Weighted Average) came in at $296.8 million for Q1 2026 at Iron Mountain, roughly flat from $295.4 million in the prior quarter.
• In the past five years, Shares Outstanding (Weighted Average) ranged from a high of $296.8 million in Q1 2026 to a low of $290.3 million in Q1 2022.
• A 5-year average of $292.9 million and a median of $292.7 million in 2024 frame the typical range for Shares Outstanding (Weighted Average).
• Across the five-year window, Shares Outstanding (Weighted Average) rose 0.38% in 2023 and grew 0.79% in 2026, its largest moves.
• Iron Mountain's Shares Outstanding (Weighted Average) stood at $290.8 million in 2022, then advanced by 0.39% to $291.9 million in 2023, then climbed by 0.49% to $293.4 million in 2024, then increased by 0.69% to $295.4 million in 2025, then gained by 0.49% to $296.8 million in 2026.
• According to Business Quant data, Shares Outstanding (Weighted Average) over the past three periods registered $296.8 million, $295.4 million, and $295.2 million for Q1 2026, Q4 2025, and Q3 2025 respectively.

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