Iron Mountain 401(k) match, vesting and fees
What Iron Mountain's 401(k) plan says about matching contributions
Plan features
Match, vesting and enrollment details have not been published from this plan's audit report yet. The figures below come from the structured filing.
| Recordkeeper | Fidelity Investments Institutional | Schedule C ↗ |
| Independent auditor | Grant Thornton LLP (unmodified opinion, limited scope) | Schedule H ↗ |
| Plan type and status | 401(k) · Active | Form 5500 ↗ |
How the plan compares
Plan year 2024 medians for 44 defined-contribution plans in transportation and warehousing with 10,000 to 49,999 participants.
| Iron Mountain: employer contribution per participant | $2,163 | |
| Peer median | $1,814 |
| Iron Mountain: average balance | $73,526 | |
| Peer median | $68,010 |
| Iron Mountain: admin expenses ÷ assets | 0.11% | |
| Peer median | 0.12% |
Admin expenses are the plan's reported administrative expenses divided by its assets; they do not include fund expense ratios.
Plan history
Plan assets went from $805M at the end of plan year 2023 to $943M at the end of plan year 2024.
| Plan year | Participants | Assets | Employer contributions | Per participant | Admin expense ratio | Match formula | Filing |
|---|---|---|---|---|---|---|---|
| 2024 | 13,269 | $943M | $27.7M | $2,163 | 0.11% | Not published | Form 5500 ↗ |
| 2023 | 12,353 | $805M | $18.6M | $1,551 | 0.11% | Not published | Form 5500 ↗ |
Other Iron Mountain plans (1)
Each plan files its own Form 5500. Figures are from each plan's latest filing.
The Iron Mountain Companies Puerto Rico 401(k) Plan
Plan features
Match, vesting and enrollment details have not been published from this plan's audit report yet. The figures below come from the structured filing.
| Plan type and status | Profit-sharing · Active | Form 5500 ↗ |
Common questions
Does Iron Mountain match 401(k) contributions?
The match terms for the The Iron Mountain Companies 401(k) Plan have not been published from its filing yet. The plan year 2024 filing reports $27.7M in employer contributions, about $2,163 per participant. That total includes any match and profit-sharing; it is not a match formula.
When is the Iron Mountain 401(k) match vested?
The vesting schedule for the The Iron Mountain Companies 401(k) Plan is not in the data published so far. Your Summary Plan Description states it.
Who manages the Iron Mountain 401(k)?
The recordkeeper listed on Schedule C of the plan year 2024 filing is Fidelity Investments Institutional. The plan administrator is Iron Mountain Incorporated.
I left Iron Mountain. How do I find my old 401(k)?
Your account stays in the plan until you move it. Contact the plan administrator (Iron Mountain Incorporated, (855) 462-7547) or the recordkeeper, Fidelity Investments Institutional. The Iron Mountain old 401(k) page lists the contacts from every plan filing. Find an old Iron Mountain 401(k)
Data from the public Form 5500 annual reports Iron Mountain filed with the U.S. Department of Labor (plan years 2023 and 2024) and, where noted, the attached independent auditor's report. Plan terms may have changed since the filing; check your current Summary Plan Description. PlanFacts is not affiliated with Iron Mountain. Not financial advice. Report a correction · Methodology