According to recent filings covering the 90 days ending February 19, 2026, the three most significant insider holders at Iron Mountain are Director Kent P Dauten (1.21Mn shares), Director Clark H Bailey (242.45K shares), Evp And Cfo Barry Hytinen (198.52K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Kent P Dauten | 1,207,681 | 02 Jun, 2025 | |
| Clark H Bailey | 242,455 | 03 Jul, 2025 | |
| Barry Hytinen | Evp And Cfo | 198,518 | 04 Mar, 2025 |
| Ernest W Cloutier | Evp & Gm And Rim | 75,097 | 25 May, 2021 |
| Deirdre Evens | Evp & Gm And Asset Lifestyle Mgmt | 67,687 | 31 Mar, 2022 |
| Walter C Rakowich | 61,980 | 05 Jun, 2025 | |
| Deborah Marson | Evp And General Counsel And Sec. | 59,686 | 04 Sep, 2024 |
| Mark Kidd | Evp And Gm Data Centers & Alm | 55,081 | 06 Jan, 2026 |
| Pamela M Arway | 40,196 | 02 Jun, 2025 | |
| Kris Halvorsen | 34,458 | 25 Jun, 2021 | |
| Monte E Ford | 29,925 | 02 Jun, 2025 | |
| Robin Matlock | 28,559 | 22 Jan, 2026 | |
| Jennifer Allerton | 18,541 | 02 Jun, 2025 | |
| Greg W Mcintosh | Evp And Cco & Gm And Global Rm | 18,107 | 05 Aug, 2025 |
| Wendy J. Murdock | 14,829 | 18 Sep, 2024 | |
| John Tomovcsik | Evp And Chief Operating Officer | 14,000 | 21 Aug, 2024 |
| Mithu Bhargava | Evp And Gm Digital Business Unit | 13,054 | 04 Mar, 2025 |
| Edward Baker-Greene | Evp And Chro | 6,859 | 20 Dec, 2024 |
| Michelle Vervais Altamura | Evp And General Counsel And Sec. | 5,752 | 06 Jan, 2026 |
| June Yee Felix | 2,991 | 02 Jun, 2025 | |
| Theodore R. Ii Samuels | 2,264 | 18 Jul, 2023 | |
| Andre Maciel | 1,627 | 24 Jul, 2024 | |
| Christie B. Kelly | 1,308 | 21 Nov, 2025 | |
| Jemma Johns | Evp And Chro | 965 | 06 Jan, 2026 |
| Daniel Borges | Svp & Chief Accounting Officer | 288 | 04 Mar, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 21 Jan, 2026 | Robin Matlock | Common Stock, par value $.01 per share | A | 10 | $0.00 | 28,559 | D | M |
| 02 Jan, 2026 | William L Meaney | Common Stock, par value $.01 per share | D | 12,673 | $83.54 | 0 | D | S |
| 02 Jan, 2026 | William L Meaney | Common Stock, par value $.01 per share | D | 25,809 | $82.99 | 12,673 | D | S |
| 02 Jan, 2026 | William L Meaney | Common Stock, par value $.01 per share | A | 38,482 | $37.00 | 38,482 | D | M |
| 02 Jan, 2026 | Mark Kidd | Common Stock, par value $.01 per share | D | 6,000 | $83.10 | 55,081 | D | S |
| 02 Jan, 2026 | Robin Matlock | Common Stock, par value $.01 per share | A | 998 | $0.00 | 28,549 | D | M |
| 02 Jan, 2026 | Michelle Vervais Altamura | Common Stock, par value $.01 per share | D | 469 | $83.24 | 5,752 | D | F |
| 02 Jan, 2026 | Michelle Vervais Altamura | Common Stock, par value $.01 per share | A | 1,214 | $0.00 | 6,221 | D | M |
| 02 Jan, 2026 | Jemma Johns | Common Stock, par value $.01 per share | A | 1,909 | $0.00 | 1,909 | D | M |
| 02 Jan, 2026 | Jemma Johns | Common Stock, par value $.01 per share | D | 944 | $83.24 | 965 | D | F |
| 01 Dec, 2025 | William L Meaney | Common Stock, par value $.01 per share | A | 69,125 | $36.59 | 69,125 | D | M |
| 01 Dec, 2025 | William L Meaney | Common Stock, par value $.01 per share | D | 10,569 | $83.93 | 0 | D | S |
| 01 Dec, 2025 | William L Meaney | Common Stock, par value $.01 per share | D | 58,556 | $83.23 | 10,569 | D | S |
| 01 Dec, 2025 | Mark Kidd | Common Stock, par value $.01 per share | D | 6,000 | $85.00 | 61,081 | D | S |
| 19 Nov, 2025 | Christie B. Kelly | Common Stock, par value $.01 per share | A | 33 | $89.52 | 1,308 | D | P |
| 03 Nov, 2025 | William L Meaney | Common Stock, par value $.01 per share | D | 10,828 | $103.69 | 0 | D | S |
| 03 Nov, 2025 | William L Meaney | Common Stock, par value $.01 per share | D | 35,678 | $102.92 | 10,828 | D | S |
| 03 Nov, 2025 | William L Meaney | Common Stock, par value $.01 per share | D | 22,619 | $102.02 | 46,506 | D | S |
| 03 Nov, 2025 | William L Meaney | Common Stock, par value $.01 per share | A | 69,125 | $36.59 | 69,125 | D | M |
| 03 Nov, 2025 | Mark Kidd | Common Stock, par value $.01 per share | D | 6,000 | $102.51 | 67,081 | D | S |