Mammoet USA South 401(k) match, vesting and fees
What Mammoet USA South'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 | Empower Annuity Insurance Company | Schedule C ↗ |
| Independent auditor | Weinstein Spira & Company (unmodified opinion, limited scope) | Schedule H ↗ |
| Plan type and status | 401(k) · Active | Form 5500 ↗ |
How the plan compares
Plan year 2025 medians for 1,392 defined-contribution plans in construction with 100 to 499 participants.
| Mammoet USA South: employer contribution per participant | $4,676 | |
| Peer median | $2,501 |
| Mammoet USA South: average balance | $189,222 | |
| Peer median | $71,471 |
| Mammoet USA South: admin expenses ÷ assets | 0.20% | |
| Peer median | 0.39% |
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 $80.7M at the end of plan year 2021 to $85.3M at the end of plan year 2025.
| Plan year | Participants | Assets | Employer contributions | Per participant | Admin expense ratio | Match formula | Filing |
|---|---|---|---|---|---|---|---|
| 2025 | 456 | $85.3M | $2.1M | $4,676 | 0.20% | Not published | Form 5500 ↗ |
| 2024 | 562 | $79.5M | $2.4M | $4,420 | 0.31% | Not published | Form 5500 ↗ |
| 2023 | 640 | $82M | $2.7M | $4,394 | 0.40% | Not published | Form 5500 ↗ |
| 2022 | 641 | $71.8M | $3M | $4,680 | 0.24% | Not published | Form 5500 ↗ |
| 2021 | 682 | $80.7M | $2.8M | $4,882 | 0.21% | Not published | Form 5500 ↗ |
Common questions
Does Mammoet USA South match 401(k) contributions?
The match terms for the Mammoet USA South, Inc. 401(k) Profit Sharing Plan and Trust have not been published from its filing yet. The plan year 2025 filing reports $2.1M in employer contributions, about $4,676 per participant. That total includes any match and profit-sharing; it is not a match formula.
When is the Mammoet USA South 401(k) match vested?
The vesting schedule for the Mammoet USA South, Inc. 401(k) Profit Sharing Plan and Trust is not in the data published so far. Your Summary Plan Description states it.
Who manages the Mammoet USA South 401(k)?
The recordkeeper listed on Schedule C of the plan year 2025 filing is Empower Annuity Insurance Company. The plan administrator is Mammoet USA South, Inc..
I left Mammoet USA South. How do I find my old 401(k)?
Your account stays in the plan until you move it. Contact the plan administrator (Mammoet USA South, Inc., (281) 369-2200) or the recordkeeper, Empower Annuity Insurance Company. The Mammoet USA South old 401(k) page lists the contacts from every plan filing. Find an old Mammoet USA South 401(k)
Data from the public Form 5500 annual reports Mammoet USA South filed with the U.S. Department of Labor (plan years 2021 and 2022 and 2023 and 2024 and 2025) 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 Mammoet USA South. Not financial advice. Report a correction · Methodology