Iron Mountain (IRM)
Iron Mountain on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on NYSE, classified by the SEC as real estate investment trusts.
7.1M
Short interest
settlement 2026-10-15
5.1
Days to cover
+0.9 days vs prior
73.3%
Short share of volume
2026-10-28
2
Fails to deliver
settlement 2026-09-28
Wed 4 Nov
Next earnings
estimated date
-$17.4M
Insider flow, 90 days
0 buys, 16 sells
As of 2026-10-28.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in IRM is 7,146,315 shares, down 786,399 shares over the last month. Over the last 48 readings it ranged from 6,463,287 shares (31 August 2026) to 11,368,731 shares (15 May 2025). At the reported average volume of 1.4M shares a day that is 5.1 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 7,146,315 | +2.1% | 1,391,692 | 5.13 |
| 2026-09-30 | 6,999,689 | -11.8% | 1,651,510 | 4.24 |
| 2026-09-15 | 7,932,714 | +22.7% | 1,690,225 | 4.69 |
| 2026-08-31 | 6,463,287 | -9.0% | 1,359,386 | 4.75 |
| 2026-08-14 | 7,103,268 | -15.2% | 1,821,231 | 3.90 |
| 2026-07-31 | 8,378,595 | +1.5% | 1,872,859 | 4.47 |
| 2026-07-15 | 8,256,613 | +10.7% | 2,418,442 | 3.41 |
| 2026-06-30 | 7,458,588 | -7.6% | 1,850,528 | 4.03 |
| 2026-06-15 | 8,070,353 | +10.5% | 1,298,291 | 6.22 |
| 2026-05-29 | 7,300,638 | -1.0% | 1,218,441 | 5.99 |
| 2026-05-15 | 7,372,454 | -3.5% | 1,689,867 | 4.36 |
| 2026-04-30 | 7,641,375 | -4.7% | 1,965,111 | 3.89 |
| 2026-04-15 | 8,021,715 | -2.0% | 1,156,167 | 6.94 |
| 2026-03-31 | 8,188,431 | -3.3% | 1,542,072 | 5.31 |
| 2026-03-13 | 8,465,576 | +11.6% | 1,373,079 | 6.17 |
| 2026-02-27 | 7,584,704 | -3.0% | 2,042,544 | 3.71 |
| 2026-02-13 | 7,821,452 | -14.6% | 2,598,138 | 3.01 |
| 2026-01-30 | 9,157,943 | +0.5% | 1,907,843 | 4.80 |
| 2026-01-15 | 9,115,857 | -5.4% | 2,028,944 | 4.49 |
| 2025-12-31 | 9,637,754 | -11.6% | 2,119,148 | 4.55 |
| 2025-12-15 | 10,906,244 | +10.2% | 1,934,629 | 5.64 |
| 2025-11-28 | 9,901,708 | -0.1% | 3,135,082 | 3.16 |
| 2025-11-14 | 9,914,331 | +29.2% | 2,251,639 | 4.40 |
| 2025-10-31 | 7,673,493 | +3.2% | 987,860 | 7.77 |
| 2025-10-15 | 7,434,140 | -7.8% | 1,406,510 | 5.29 |
| 2025-09-30 | 8,066,615 | -7.0% | 1,680,680 | 4.80 |
| 2025-09-15 | 8,678,753 | +0.3% | 1,637,318 | 5.30 |
| 2025-08-29 | 8,650,084 | +2.6% | 1,030,840 | 8.39 |
| 2025-08-15 | 8,431,840 | +20.6% | 1,948,712 | 4.33 |
| 2025-07-31 | 6,992,274 | -6.0% | 910,404 | 7.68 |
| 2025-07-15 | 7,439,879 | -6.6% | 1,360,405 | 5.47 |
| 2025-06-30 | 7,964,361 | -23.9% | 2,183,159 | 3.65 |
| 2025-06-13 | 10,468,229 | +10.7% | 1,364,646 | 7.67 |
| 2025-05-30 | 9,456,156 | -16.8% | 1,638,157 | 5.77 |
| 2025-05-15 | 11,368,731 | +10.8% | 1,625,487 | 6.99 |
| 2025-04-30 | 10,258,438 | +8.7% | 1,479,943 | 6.93 |
| 2025-04-15 | 9,436,137 | -2.3% | 2,336,277 | 4.04 |
| 2025-03-31 | 9,657,633 | +11.7% | 1,785,618 | 5.41 |
| 2025-03-14 | 8,647,278 | -4.3% | 2,698,115 | 3.20 |
| 2025-02-28 | 9,032,044 | +4.0% | 2,782,049 | 3.25 |
| 2025-02-14 | 8,683,441 | +8.0% | 1,911,638 | 4.54 |
| 2025-01-31 | 8,040,973 | -1.4% | 1,946,152 | 4.13 |
| 2025-01-15 | 8,153,113 | +8.1% | 1,985,654 | 4.11 |
| 2024-12-31 | 7,540,708 | -5.3% | 2,075,094 | 3.63 |
| 2024-12-13 | 7,966,481 | -4.8% | 1,631,667 | 4.88 |
| 2024-11-29 | 8,365,000 | +0.2% | 1,147,808 | 7.29 |
| 2024-11-15 | 8,346,143 | -9.9% | 1,831,054 | 4.56 |
| 2024-10-31 | 9,267,997 | +3.6% | 1,348,613 | 6.87 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 28 October 2026, the short share of IRM volume is 73.3%, up 2.5 points over the last five sessions. Over the last 30 readings it ranged from 24.7% (30 September 2026) to 79.9% (8 October 2026). The latest reading is 15.3 points above the 30-session average of 58.1%, on 499K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-28 | 366K | 499K | 73.3% | 5 |
| 2026-10-27 | 154K | 274K | 56.3% | 2 |
| 2026-10-26 | 213K | 354K | 60.2% | 57 |
| 2026-10-23 | 234K | 401K | 58.5% | 4 |
| 2026-10-22 | 518K | 705K | 73.5% | 6 |
| 2026-10-21 | 500K | 707K | 70.8% | 9 |
| 2026-10-20 | 443K | 875K | 50.6% | 279 |
| 2026-10-19 | 213K | 356K | 59.9% | 942 |
| 2026-10-16 | 282K | 579K | 48.6% | 12 |
| 2026-10-15 | 352K | 521K | 67.5% | 1 |
| 2026-10-14 | 292K | 379K | 77.1% | 1,374 |
| 2026-10-13 | 279K | 418K | 66.6% | 31 |
| 2026-10-12 | 227K | 318K | 71.3% | 6 |
| 2026-10-09 | 262K | 446K | 58.7% | 0 |
| 2026-10-08 | 607K | 759K | 79.9% | 1,287 |
| 2026-10-07 | 287K | 482K | 59.6% | 77 |
| 2026-10-06 | 252K | 468K | 53.8% | 163 |
| 2026-10-05 | 364K | 532K | 68.5% | 1,089 |
| 2026-10-02 | 355K | 610K | 58.3% | 0 |
| 2026-10-01 | 273K | 663K | 41.2% | 567 |
| 2026-09-30 | 151K | 613K | 24.7% | 0 |
| 2026-09-29 | 135K | 517K | 26.1% | 0 |
| 2026-09-28 | 190K | 549K | 34.6% | 0 |
| 2026-09-25 | 274K | 520K | 52.6% | 3,076 |
| 2026-09-24 | 213K | 399K | 53.5% | 823 |
| 2026-09-23 | 429K | 613K | 70.1% | 902 |
| 2026-09-22 | 341K | 599K | 56.9% | 611 |
| 2026-09-21 | 285K | 428K | 66.6% | 6 |
| 2026-09-18 | 302K | 577K | 52.3% | 2 |
| 2026-09-17 | 222K | 441K | 50.3% | 1,065 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 28 September 2026, the fails-to-deliver balance in IRM is 2 shares, down 96 shares over the last settlement date. Over the last 30 readings it ranged from 2 shares (28 September 2026) to 36,987 shares (25 June 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-28 | 2 | $111.38 | $223 |
| 2026-09-15 | 98 | $112.06 | $11K |
| 2026-09-08 | 28 | $116.86 | $3K |
| 2026-08-25 | 501 | $121.19 | $61K |
| 2026-08-24 | 123 | $122.02 | $15K |
| 2026-08-21 | 330 | $122.94 | $41K |
| 2026-08-18 | 1,523 | $129.90 | $198K |
| 2026-08-04 | 54 | $124.08 | $7K |
| 2026-07-16 | 3,635 | $123.52 | $449K |
| 2026-06-30 | 5,187 | $129.97 | $674K |
| 2026-06-25 | 36,987 | $130.59 | $4.8M |
| 2026-06-22 | 3,581 | $127.83 | $458K |
| 2026-06-15 | 2,589 | $127.24 | $329K |
| 2026-06-12 | 11,140 | $125.17 | $1.4M |
| 2026-06-08 | 29 | $124.66 | $4K |
| 2026-05-29 | 3,943 | $126.83 | $500K |
| 2026-05-13 | 17 | $126.21 | $2K |
| 2026-05-08 | 547 | $126.81 | $69K |
| 2026-05-04 | 367 | $127.19 | $47K |
| 2026-04-29 | 4,792 | $112.62 | $540K |
| 2026-04-24 | 1,100 | $116.12 | $128K |
| 2026-04-20 | 13,069 | $118.07 | $1.5M |
| 2026-04-17 | 6,955 | $117.73 | $819K |
| 2026-04-15 | 3 | $114.03 | $342 |
| 2026-04-06 | 8 | $103.30 | $826 |
| 2026-04-02 | 2,278 | $100.95 | $230K |
| 2026-03-26 | 714 | $100.53 | $72K |
| 2026-03-25 | 30 | $100.71 | $3K |
| 2026-03-24 | 340 | $101.94 | $35K |
| 2026-03-16 | 100 | $106.84 | $11K |
Insider trades
SEC Form 4, newest first. JSONInsiders at IRM reported 16 open-market sells worth $17.4M in the last 90 days and no open-market buys. Latest filing: McIntosh Greg W (EVP, Chief Commercial Officer) on 2026-10-01.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-01 | McIntosh Greg W | EVP, Chief Commercial Officer | Sell | 5K | $110.72 | $554K | 71K |
| 2026-10-01 | Meaney William L | President and CEO | Sell | 14K | $111.18 | $1.6M | 0 |
| 2026-10-01 | Meaney William L | President and CEO | Sell | 11K | $110.56 | $1.2M | 14K |
| 2026-10-01 | Meaney William L | President and CEO | Sell | 13K | $109.57 | $1.5M | 25K |
| 2026-10-01 | Meaney William L | President and CEO | Exercise or conversion | 38K | $37.00 | $1.4M | 38K |
| 2026-09-01 | McIntosh Greg W | EVP, Chief Commercial Officer | Sell | 5K | $115.60 | $578K | 76K |
| 2026-09-01 | Kidd Mark | EVP, GM Data Centers & ALM | Sell | 6K | $115.60 | $694K | 96K |
| 2026-09-01 | Meaney William L | President and CEO | Sell | 89 | $116.00 | $10K | 0 |
| 2026-09-01 | Meaney William L | President and CEO | Sell | 6K | $115.00 | $702K | 89 |
| 2026-09-01 | Meaney William L | President and CEO | Sell | 21K | $114.14 | $2.4M | 6K |
| 2026-09-01 | Meaney William L | President and CEO | Sell | 11K | $113.45 | $1.3M | 27K |
| 2026-09-01 | Meaney William L | President and CEO | Exercise or conversion | 38K | $37.00 | $1.4M | 38K |
| 2026-08-07 | Kidd Mark | EVP, GM Data Centers & ALM | Sell | 6K | $122.70 | $736K | 102K |
| 2026-08-07 | Meaney William L | President and CEO | Sell | 3K | $122.75 | $357K | 0 |
| 2026-08-07 | Meaney William L | President and CEO | Sell | 17K | $122.11 | $2.0M | 3K |
| 2026-08-07 | Meaney William L | President and CEO | Sell | 19K | $121.10 | $2.3M | 20K |
| 2026-08-07 | Meaney William L | President and CEO | Exercise or conversion | 38K | $37.00 | $1.4M | 38K |
| 2026-08-06 | McIntosh Greg W | EVP, Chief Commercial Officer | Sell | 7K | $127.13 | $869K | 81K |
| 2026-08-06 | McIntosh Greg W | EVP, Chief Commercial Officer | Exercise or conversion | 7K | $37.00 | $253K | 87K |
| 2026-08-06 | McIntosh Greg W | EVP, Chief Commercial Officer | Sell | 5K | $127.13 | $636K | 81K |
| 2026-07-01 | Kidd Mark | EVP, GM Data Centers & ALM | Sell | 6K | $125.62 | $754K | 108K |
| 2026-07-01 | Meaney William L | President and CEO | Sell | 3K | $125.82 | $318K | 0 |
| 2026-07-01 | Meaney William L | President and CEO | Sell | 2K | $124.72 | $200K | 3K |
| 2026-07-01 | Meaney William L | President and CEO | Sell | 7K | $123.84 | $888K | 4K |
| 2026-07-01 | Meaney William L | President and CEO | Sell | 10K | $122.84 | $1.2M | 11K |
| 2026-07-01 | Meaney William L | President and CEO | Sell | 18K | $121.81 | $2.1M | 21K |
| 2026-07-01 | Meaney William L | President and CEO | Exercise or conversion | 38K | $37.00 | $1.4M | 38K |
| 2026-06-01 | Kidd Mark | EVP, GM Data Centers & ALM | Sell | 6K | $126.70 | $760K | 114K |
| 2026-06-01 | Meaney William L | President and CEO | Sell | 1K | $129.66 | $141K | 0 |
| 2026-06-01 | Meaney William L | President and CEO | Sell | 9K | $129.14 | $1.2M | 1K |
| 2026-06-01 | Meaney William L | President and CEO | Sell | 8K | $127.90 | $962K | 10K |
| 2026-06-01 | Meaney William L | President and CEO | Sell | 10K | $127.00 | $1.3M | 18K |
| 2026-06-01 | Meaney William L | President and CEO | Sell | 10K | $126.20 | $1.3M | 28K |
| 2026-06-01 | Meaney William L | President and CEO | Exercise or conversion | 38K | $37.00 | $1.4M | 38K |
| 2026-05-21 | Borges Daniel | SVP & Chief Accounting Officer | Sell | 7K | $125.50 | $902K | 0 |
| 2026-05-20 | RAKOWICH WALTER C | Director | Sell | 757 | $124.45 | $94K | 1K |
| 2026-05-12 | Arway Pamela M | Director | Sell | 2K | $128.97 | $244K | 40K |
| 2026-05-08 | Kidd Mark | EVP, GM Data Centers & ALM | Sell | 6K | $127.91 | $767K | 120K |
| 2026-05-08 | Meaney William L | President and CEO | Sell | 24K | $129.19 | $3.0M | 0 |
| 2026-05-08 | Meaney William L | President and CEO | Sell | 15K | $128.52 | $1.9M | 24K |
| 2026-05-08 | Meaney William L | President and CEO | Exercise or conversion | 38K | $37.00 | $1.4M | 38K |
| 2026-05-07 | Matlock Robin | Director | Grant | 2K | $0.00 | $0 | 30K |
| 2026-05-07 | Simons Doyle | Director | Grant | 2K | $0.00 | $0 | 2K |
| 2026-05-07 | RAKOWICH WALTER C | Director | Grant | 2K | $0.00 | $0 | 2K |
| 2026-05-07 | Kelly Christie B. | Director | Grant | 2K | $0.00 | $0 | 3K |
| 2026-05-07 | Felix June Yee | Director | Grant | 2K | $0.00 | $0 | 5K |
| 2026-05-07 | FORD MONTE E | Director | Grant | 2K | $0.00 | $0 | 32K |
| 2026-05-07 | DAUTEN KENT P | Director | Grant | 2K | $0.00 | $0 | 1.2M |
| 2026-05-07 | Arway Pamela M | Director | Grant | 2K | $0.00 | $0 | 42K |
| 2026-05-07 | Allerton Jennifer | Director | Tax withholding | 133 | $126.81 | $17K | 13K |
| 2026-05-07 | Allerton Jennifer | Director | Grant | 2K | $0.00 | $0 | 13K |
| 2026-05-01 | RAKOWICH WALTER C | Director | Gift | 2K | $0.00 | $0 | 24K |
| 2026-04-01 | Kidd Mark | EVP, GM Data Centers & ALM | Sell | 6K | $102.71 | $616K | 126K |
| 2026-04-01 | Meaney William L | President and CEO | Sell | 38K | $102.71 | $4.0M | 0 |
| 2026-04-01 | Meaney William L | President and CEO | Exercise or conversion | 38K | $37.00 | $1.4M | 38K |
| 2026-03-19 | Bhargava Mithu | EVP, GM Digital Business Unit | Sell | 12K | $105.13 | $1.3M | 16K |
| 2026-03-19 | Bhargava Mithu | EVP, GM Digital Business Unit | Sell | 20K | $104.30 | $2.1M | 29K |
| 2026-03-19 | Bhargava Mithu | EVP, GM Digital Business Unit | Sell | 20 | $105.64 | $2K | 49K |
| 2026-03-19 | Bhargava Mithu | EVP, GM Digital Business Unit | Sell | 13K | $105.04 | $1.3M | 49K |
| 2026-03-19 | Bhargava Mithu | EVP, GM Digital Business Unit | Sell | 14K | $104.25 | $1.5M | 62K |
| 2026-03-05 | Meaney William L | President and CEO | Sell | 38K | $107.02 | $4.1M | 0 |
| 2026-03-05 | Meaney William L | President and CEO | Sell | 34K | $106.15 | $3.6M | 38K |
| 2026-03-05 | Meaney William L | President and CEO | Sell | 26K | $105.26 | $2.8M | 72K |
| 2026-03-04 | Meaney William L | President and CEO | Sell | 71K | $107.52 | $7.6M | 99K |
| 2026-03-04 | Meaney William L | President and CEO | Sell | 28K | $106.96 | $3.0M | 170K |
| 2026-03-03 | Meaney William L | President and CEO | Sell | 26K | $107.94 | $2.8M | 197K |
| 2026-03-03 | Meaney William L | President and CEO | Sell | 31K | $107.43 | $3.3M | 223K |
| 2026-03-03 | Meaney William L | President and CEO | Sell | 18K | $106.33 | $2.0M | 254K |
| 2026-03-03 | Meaney William L | President and CEO | Sell | 24K | $105.25 | $2.5M | 272K |
| 2026-03-02 | Kidd Mark | EVP, GM Data Centers & ALM | Sell | 6K | $107.27 | $644K | 132K |
| 2026-03-02 | Meaney William L | President and CEO | Sell | 2K | $110.64 | $202K | 296K |
| 2026-03-02 | Meaney William L | President and CEO | Sell | 18K | $110.02 | $2.0M | 298K |
| 2026-03-02 | Meaney William L | President and CEO | Sell | 16K | $108.91 | $1.8M | 316K |
| 2026-03-02 | Meaney William L | President and CEO | Sell | 2K | $107.95 | $224K | 332K |
| 2026-03-02 | Meaney William L | President and CEO | Exercise or conversion | 38K | $37.00 | $1.4M | 334K |
| 2026-03-02 | Meaney William L | President and CEO | Sell | 3K | $110.74 | $354K | 296K |
| 2026-03-02 | Meaney William L | President and CEO | Sell | 41K | $110.05 | $4.6M | 299K |
| 2026-03-02 | Meaney William L | President and CEO | Sell | 37K | $109.07 | $4.1M | 341K |
| 2026-03-02 | Meaney William L | President and CEO | Sell | 14K | $108.27 | $1.5M | 378K |
| 2026-03-02 | Meaney William L | President and CEO | Sell | 3K | $107.16 | $314K | 392K |
| 2026-03-02 | Allerton Jennifer | Director | Sell | 7K | $108.88 | $762K | 12K |
| 2026-03-01 | McIntosh Greg W | EVP, Chief Commercial Officer | Tax withholding | 56K | $108.33 | $6.0M | 86K |
| 2026-03-01 | McIntosh Greg W | EVP, Chief Commercial Officer | Exercise or conversion | 123K | $0.00 | $0 | 141K |
| 2026-03-01 | Kidd Mark | EVP, GM Data Centers & ALM | Tax withholding | 61K | $108.33 | $6.6M | 138K |
| 2026-03-01 | Kidd Mark | EVP, GM Data Centers & ALM | Exercise or conversion | 150K | $0.00 | $0 | 199K |
| 2026-03-01 | Meaney William L | President and CEO | Tax withholding | 256K | $108.33 | $27.7M | 395K |
| 2026-03-01 | Meaney William L | President and CEO | Exercise or conversion | 651K | $0.00 | $0 | 651K |
| 2026-03-01 | Hytinen Barry | EVP and CFO | Tax withholding | 105K | $108.33 | $11.4M | 327K |
| 2026-03-01 | Hytinen Barry | EVP and CFO | Exercise or conversion | 233K | $0.00 | $0 | 431K |
| 2026-03-01 | Borges Daniel | SVP & Chief Accounting Officer | Tax withholding | 184 | $108.33 | $20K | 7K |
| 2026-03-01 | Borges Daniel | SVP & Chief Accounting Officer | Exercise or conversion | 402 | $0.00 | $0 | 7K |
| 2026-03-01 | Borges Daniel | SVP & Chief Accounting Officer | Tax withholding | 212 | $108.33 | $23K | 7K |
| 2026-03-01 | Borges Daniel | SVP & Chief Accounting Officer | Exercise or conversion | 463 | $0.00 | $0 | 7K |
| 2026-03-01 | Borges Daniel | SVP & Chief Accounting Officer | Tax withholding | 327 | $108.33 | $35K | 7K |
| 2026-03-01 | Borges Daniel | SVP & Chief Accounting Officer | Exercise or conversion | 713 | $0.00 | $0 | 7K |
| 2026-03-01 | Borges Daniel | SVP & Chief Accounting Officer | Tax withholding | 3K | $108.33 | $336K | 6K |
| 2026-03-01 | Borges Daniel | SVP & Chief Accounting Officer | Exercise or conversion | 9K | $0.00 | $0 | 9K |
| 2026-03-01 | Bhargava Mithu | EVP, GM Digital Business Unit | Tax withholding | 1K | $108.33 | $144K | 76K |
| 2026-03-01 | Bhargava Mithu | EVP, GM Digital Business Unit | Exercise or conversion | 3K | $0.00 | $0 | 77K |
| 2026-03-01 | Bhargava Mithu | EVP, GM Digital Business Unit | Tax withholding | 1K | $108.33 | $139K | 74K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON37 Form 144 notices on file for IRM worth $125.2M at the prices reported; 8 in the last 90 days worth $17.5M. Latest: McIntosh Greg W filed on 2026-10-01 to sell 5,000 shares ($554K) from 2026-10-01.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-10-01 | McIntosh Greg WOfficer | 5K | $554K | 0.002% | 2026-10-01 | Fidelity Brokerage Services LLC |
| 2026-10-01 | Meaney William LOfficer, Director | 38K | $4.3M | 0.013% | 2026-10-01 | Fidelity Brokerage Services LLC |
| 2026-09-01 | McIntosh Greg WOfficer | 5K | $578K | 0.002% | 2026-09-01 | Fidelity Brokerage Services LLC |
| 2026-09-01 | Meaney William LOfficer, Director | 38K | $4.4M | 0.013% | 2026-09-01 | Fidelity Brokerage Services LLC |
| 2026-09-01 | Kidd MarkOfficer | 6K | $694K | 0.002% | 2026-09-01 | Fidelity Brokerage Services LLC |
| 2026-08-07 | Kidd MarkOfficer | 6K | $736K | 0.002% | 2026-08-07 | Fidelity Brokerage Services LLC |
| 2026-08-07 | Meaney William LOfficer, Director | 38K | $4.7M | 0.013% | 2026-08-07 | Fidelity Brokerage Services LLC |
| 2026-08-06 | McIntosh Greg WOfficer | 12K | $1.5M | 0.004% | 2026-08-06 | Fidelity Brokerage Services LLC |
| 2026-07-01 | Meaney William LOfficer, Director | 38K | $4.8M | 0.013% | 2026-07-01 | Fidelity Brokerage Services LLC |
| 2026-07-01 | Kidd MarkOfficer | 6K | $754K | 0.002% | 2026-07-01 | Fidelity Brokerage Services LLC |
| 2026-06-01 | Meaney William LOfficer, Director | 38K | $4.9M | 0.013% | 2026-06-01 | Fidelity Brokerage Services LLC |
| 2026-06-01 | Kidd MarkOfficer | 6K | $760K | 0.002% | 2026-06-01 | Fidelity Brokerage Services LLC |
| 2026-05-21 | Borges DanielOfficer | 7K | $902K | 0.002% | 2026-05-21 | Fidelity Brokerage Services LLC |
| 2026-05-20 | RAKOWICH WALTER CDirector | 757 | $94K | 0.000% | 2026-05-20 | Fidelity Brokerage Services LLC |
| 2026-05-12 | Arway Pamela MDirector | 2K | $244K | 0.001% | 2026-05-12 | Fidelity Brokerage Services LLC |
| 2026-05-08 | Meaney William LOfficer, Director | 38K | $5.0M | 0.013% | 2026-05-08 | Fidelity Brokerage Services LLC |
| 2026-05-08 | Kidd MarkOfficer | 6K | $767K | 0.002% | 2026-05-08 | Fidelity Brokerage Services LLC |
| 2026-04-01 | Meaney William LOfficer, Director | 38K | $4.0M | 0.013% | 2026-04-01 | Fidelity Brokerage Services LLC |
| 2026-04-01 | Kidd MarkOfficer | 6K | $616K | 0.002% | 2026-04-01 | Fidelity Brokerage Services LLC |
| 2026-03-19 | Bhargava MithuOfficer | 60K | $6.2M | 0.020% | 2026-03-19 | Fidelity Brokerage Services LLC |
| 2026-03-05 | Meaney William LOfficer, Director | 99K | $10.4M | 0.033% | 2026-03-05 | Fidelity Brokerage Services LLC |
| 2026-03-04 | Meaney William LOfficer | 99K | $10.6M | 0.033% | 2026-03-04 | Fidelity Brokerage Services LLC |
| 2026-03-03 | Meaney William LOfficer, Director | 99K | $10.6M | 0.033% | 2026-03-03 | Fidelity Brokerage Services LLC |
| 2026-03-02 | Meaney William LOfficer, Director | 137K | $14.7M | 0.046% | 2026-03-02 | Fidelity Brokerage Services LLC |
| 2026-03-02 | Kidd MarkOfficer | 6K | $644K | 0.002% | 2026-03-02 | Fidelity Brokerage Services LLC |
| 2026-03-02 | Allerton JenniferDirector | 7K | $762K | 0.002% | 2026-03-02 | Fidelity Brokerage Services LLC |
| 2026-02-20 | Meaney William LOfficer, Director | 38K | $4.2M | 0.013% | 2026-02-20 | Fidelity Brokerage Services LLC |
| 2026-02-20 | Kidd MarkOfficer | 6K | $649K | 0.002% | 2026-02-20 | Fidelity Brokerage Services LLC |
| 2026-01-02 | Meaney William LOfficer, Director | 38K | $3.2M | 0.013% | 2026-01-02 | Fidelity Brokerage Services LLC |
| 2026-01-02 | Kidd MarkOfficer | 6K | $499K | 0.002% | 2026-01-02 | Fidelity Brokerage Services LLC |
| 2025-12-01 | Meaney William LOfficer, Director | 69K | $5.8M | 0.023% | 2025-12-01 | Fidelity Brokerage Services LLC |
| 2025-12-01 | Kidd MarkOfficer | 6K | $510K | 0.002% | 2025-12-01 | Fidelity Brokerage Services LLC |
| 2025-11-03 | Meaney William LOfficer, Director | 69K | $7.1M | 0.023% | 2025-11-03 | Fidelity Brokerage Services LLC |
| 2025-11-03 | Kidd MarkOfficer | 6K | $615K | 0.002% | 2025-11-03 | Fidelity Brokerage Services LLC |
| 2025-10-31 | Kidd MarkOfficer | 7K | $737K | 0.002% | 2025-10-31 | Fidelity Brokerage Services LLC |
| 2025-10-01 | Meaney William LOfficer, Director | 69K | $7.1M | 0.023% | 2025-10-01 | Fidelity Brokerage Services LLC |
| 2025-10-01 | Kidd MarkOfficer | 6K | $610K | 0.002% | 2025-10-01 | Fidelity Brokerage Services LLC |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON2 holders report 5% or more of IRM in their latest filing, all on Schedule 13G (passive). The largest reported stake is Vanguard Portfolio Management at 8.4% of the class (25,051,135 shares), filed 2026-04-29 for an event on 2026-03-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-05-07 | 13G/Ano. 2 | Cohen & Steers, Inc.parent holding company, corporation | 14.6M | 4.9% | 2026-04-30 |
| 2026-05-07 | 13G/Ano. 2 | Cohen & Steers Capital Management, Inc.investment adviser, corporation | 14.4M | 4.8% | 2026-04-30 |
| 2026-05-07 | 13G/Ano. 2 | Cohen & Steers UK Limitedinvestment adviser, corporation | 142K | 0.1% | 2026-04-30 |
| 2026-05-07 | 13G/Ano. 2 | Cohen & Steers Ireland Limitednon-US institution, corporation | 16K | 0.0% | 2026-04-30 |
| 2026-05-07 | 13G/Ano. 2 | Cohen & Steers Asia Limitedinvestment adviser, corporation | 0 | 0.0% | 2026-04-30 |
| 2026-04-30 | 13G | Vanguard Capital Managementinvestment adviser | 21.9M | 7.3% | 2026-03-31 |
| 2026-04-29 | 13G | Vanguard Portfolio Managementinvestment adviser | 25.1M | 8.4% | 2026-03-31 |
| 2026-03-27 | 13G/Ano. 12 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
13F holders
Tracked managers holding IRM at their latest 13F. JSON8 of the 30 tracked managers held IRM at their latest 13F, $368.9M in total at quarter-end prices. AQR Capital Management is the largest at $266.5M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 4 added shares and 4 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| AQR Capital Management | 2026-06-30 | 2.1M | $266.5M | 0.09% | +281K |
| Citadel Advisors | 2026-06-30 | 343K | $43.3M | 0.01% | -32K |
| Millennium Management | 2026-06-30 | 157K | $19.8M | 0.01% | -217K |
| Point72 Asset Management | 2026-06-30 | 123K | $15.6M | 0.02% | -254K |
| D. E. Shaw & Co. | 2026-06-30 | 110K | $13.9M | 0.01% | new |
| Two Sigma Investments | 2026-06-30 | 66K | $8.3M | 0.01% | -113K |
| Renaissance Technologies | 2026-06-30 | 8K | $973K | 0.00% | +5K |
| Fisher Asset Management | 2026-06-30 | 4K | $498K | 0.00% | +464 |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
Financials
SEC XBRL, as filed. JSONIn Q2 FY 2026 (quarter ended 2026-06-30) Iron Mountain reported revenue of $2.03B, up 18.5% from the same quarter a year earlier (0.34 diluted EPS). In FY 2025 it generated $1.34B of operating cash flow and spent $919.4M on dividends.
- Debt
- $17.35B
- Equity
- -$1.28B
- Total assets
- $21.96B
- Shares outstanding
- 297,702,812
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q2 FY 2026 | 2026-06-30 | $2.03B | n/a | n/a | 0.34 |
| Q1 FY 2026 | 2026-03-31 | $1.94B | n/a | n/a | 0.48 |
| Q4 FY 2025derived | 2025-12-31 | $1.84B | n/a | n/a | n/a |
| Q3 FY 2025 | 2025-09-30 | $1.75B | n/a | n/a | 0.28 |
| Q2 FY 2025 | 2025-06-30 | $1.71B | n/a | n/a | -0.15 |
| Q1 FY 2025 | 2025-03-31 | $1.59B | n/a | n/a | 0.05 |
| Q4 FY 2024derived | 2024-12-31 | $1.58B | n/a | n/a | n/a |
| Q3 FY 2024 | 2024-09-30 | $1.56B | n/a | n/a | -0.11 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-12-31 | $6.90B | n/a | $1.34B | $2.27B | n/a | $919.4M |
| FY 2024 | 2024-12-31 | $6.15B | n/a | $1.20B | $1.79B | n/a | $789.5M |
| FY 2023 | 2023-12-31 | $5.48B | n/a | $1.11B | $1.34B | n/a | $737.6M |
| FY 2022 | 2022-12-31 | $5.10B | n/a | $927.7M | $875.4M | n/a | $724.4M |
| FY 2021 | 2021-12-31 | $4.49B | n/a | $758.9M | $611.1M | n/a | $718.3M |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-24 from the cover page.
What this page is
Iron Mountain in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Iron Mountain (IRM), SEC CIK 1020569, listed on NYSE, classified by the SEC as real estate investment trusts. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-28.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-28.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-10-01.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-05-07.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-05.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-10-01.JSON and CSV
- Company record
- EDGAR filing index for CIK 1020569Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
Other companies the SEC classifies as real estate investment trusts
Other company pages
Datasets
Frequently Asked Questions
How much of IRM is sold short?
7,146,315 shares were held short at the 2026-10-15 settlement, 5.1 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is IRM's daily short volume?
On 2026-10-28, 366,143 of the 499,400 IRM shares reported to FINRA were sold short, 73.3% of the day's reported volume. Short volume is a flow for one day, not a position.
Does IRM have fails to deliver?
The SEC's latest file shows 2 IRM shares failed to deliver at settlement 2026-09-28. Fails are reported per settlement date and published twice a month with a lag.
Are IRM insiders buying or selling?
Insiders at IRM reported 16 open-market sells worth $17.4M in the last 90 days and no open-market buys. Latest filing: McIntosh Greg W (EVP, Chief Commercial Officer) on 2026-10-01.
Have IRM insiders filed to sell?
37 Form 144 notices on file for IRM worth $125.2M at the prices reported; 8 in the last 90 days worth $17.5M. Latest: McIntosh Greg W filed on 2026-10-01 to sell 5,000 shares ($554K) from 2026-10-01.
Who owns 5% or more of IRM?
2 holders report 5% or more of IRM in their latest filing, all on Schedule 13G (passive). The largest reported stake is Vanguard Portfolio Management at 8.4% of the class (25,051,135 shares), filed 2026-04-29 for an event on 2026-03-31.
What did IRM report last quarter?
In Q2 FY 2026 (quarter ended 2026-06-30) Iron Mountain reported revenue of $2.03B, up 18.5% from the same quarter a year earlier (0.34 diluted EPS). In FY 2025 it generated $1.34B of operating cash flow and spent $919.4M on dividends.
Which tracked 13F managers own IRM?
8 of the 30 tracked 13F managers held IRM shares at their latest filing, $368.9M in all. The largest: Cliff Asness's AQR Capital Management (2.1M shares, $266.5M), Ken Griffin's Citadel Advisors (343K shares, $43.3M), Izzy Englander's Millennium Management (157K shares, $19.8M), Steve Cohen's Point72 Asset Management (123K shares, $15.6M), D. E. Shaw & Co. (110K shares, $13.9M), Two Sigma Investments (66K shares, $8.3M). The table above lists all 8.
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.