| Balance Sheets | 2025-09-30 | 2025-06-30 | 2025-03-31 | 2024-09-30 |
|---|---|---|---|---|
| Cash and cash equivalents | 195,210 | 217,992 | 155,338 | 168,515 |
| Accounts receivable (less allowances of 106,587 and 86,712 as of september30, 2025 and december31, 2024, respectively) | 1,371,367 | 1,387,110 | 1,312,079 | 1,243,464 |
| Prepaid expenses and other | 314,293 | 292,146 | 282,945 | 306,867 |
| Total current assets | 1,880,870 | 1,897,248 | 1,750,362 | 1,718,846 |
| Property, plant and equipment | 13,975,948 | 13,500,719 | 12,758,467 | 11,549,081 |
| Lessaccumulated depreciation | 4,838,448 | 4,725,996 | 4,509,307 | 4,354,477 |
| Property, plant and equipment, net | 9,137,500 | 8,774,723 | 8,249,160 | 7,194,604 |
| Goodwill | 5,269,541 | 5,229,943 | 5,141,810 | 5,198,460 |
| Customer and supplier relationships and other intangible assets | 1,253,919 | 1,244,957 | 1,266,993 | 1,276,963 |
| Operating lease right-of-use assets | 2,455,450 | 2,414,510 | 2,386,511 | 2,591,238 |
| Other | 635,573 | 615,408 | 567,251 | 489,518 |
| Total other assets, net | 9,614,483 | 9,504,818 | 9,362,565 | 9,556,179 |
| Total assets | 20,632,853 | 20,176,789 | 19,362,087 | 18,469,629 |
| Current portion of long-term debt | 699,320 | 777,881 | 736,922 | 136,547 |
| Accounts payable | 658,138 | 650,906 | 707,581 | 586,793 |
| Accrued expenses and other current liabilities (includes current portion of operating lease liabilities) | 1,151,107 | 1,227,760 | 1,063,237 | 1,288,176 |
| Deferred revenue | 347,018 | 342,225 | 333,171 | 294,545 |
| Total current liabilities | 2,855,583 | 2,998,772 | 2,840,911 | 2,306,061 |
| Long-term debt, net of current portion | 15,494,236 | 14,818,175 | 14,177,474 | 13,245,462 |
| Long-term operating lease liabilities, net of current portion | 2,283,504 | 2,254,841 | 2,224,080 | 2,438,905 |
| Other long-term liabilities | 389,106 | 375,971 | 339,144 | 277,588 |
| Deferred income taxes | 218,223 | 221,045 | 204,516 | 233,484 |
| Redeemable noncontrolling interests | 75,353 | 76,852 | 78,237 | 70,537 |
| Common stock (par value 0.01 authorized 400,000,000 shares issued and outstanding 295,504,799 and 293,592,637 shares as of september30, 2025 and december31, 2024, respectively) | 2,955 | 2,953 | 2,950 | 2,934 |
| Additional paid-in capital | 4,730,575 | 4,680,581 | 4,609,663 | 4,602,246 |
| (distributions in excess of earnings) earnings in excess of distributions | 5,236,868 | 5,087,387 | 4,808,764 | 4,475,682 |
| Accumulated other comprehensive items, net | -378,624 | -363,583 | -502,369 | -388,511 |
| Total iron mountain incorporated stockholders' (deficit) equity | -881,962 | -767,436 | -698,520 | -259,013 |
| Noncontrolling interests | 198,810 | 198,569 | 196,245 | 156,605 |
| Total (deficit) equity | -683,152 | -568,867 | -502,275 | -102,408 |
| Total liabilities and (deficit) equity | 20,632,853 | 20,176,789 | 19,362,087 | 18,469,629 |
IRON MOUNTAIN INC (IRM)
IRON MOUNTAIN INC (IRM)