Iron Mountain shares owned by Madison Asset Management
Quarter-by-quarter ownership of Iron Mountain (IRM) shares owned by Madison Asset Management
from 13F filings
Historical chart of Madison Asset Management investment in Iron Mountain
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Quarterly reported holdings in Iron Mountain by Madison Asset Management
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $1.8M | 18k | 101.94 |
| 2025-06-30 | $1.9M | 19k | 102.57 |
| 2025-03-31 | $1.6M | 19k | 86.04 |
| 2024-12-31 | $2.6M | 24k | 105.11 |
| 2024-09-30 | $2.9M | 24k | 118.83 |
| 2024-06-30 | $2.7M | 30k | 89.62 |
| 2024-03-31 | $2.4M | 30k | 80.21 |
| 2023-12-31 | $2.1M | 30k | 69.98 |
| 2023-09-30 | $1.8M | 30k | 59.45 |
| 2023-06-30 | $1.7M | 31k | 56.82 |
| 2023-03-31 | $1.6M | 31k | 52.91 |
| 2022-12-31 | $1.7M | 35k | 49.84 |
| 2022-09-30 | $1.6M | 36k | 43.96 |
| 2022-06-30 | $1.7M | 36k | 48.69 |
| 2022-03-31 | $2.0M | 36k | 55.42 |
| 2021-12-31 | $1.9M | 36k | 52.32 |
| 2021-09-30 | $1.5M | 34k | 43.45 |
| 2021-06-30 | $1.4M | 32k | 42.33 |
| 2021-03-31 | $1.1M | 31k | 37.00 |
| 2020-12-31 | $887k | 30k | 29.49 |
| 2020-09-30 | $806k | 30k | 26.79 |
| 2020-06-30 | $785k | 30k | 26.09 |
| 2020-03-31 | $502k | 21k | 23.81 |
| 2019-12-31 | $430k | 14k | 31.89 |