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Mammoth Underground LLC

Las Vegas, NV, 89106

EIN 02-0646474
Plans
3
Total participants
632
Filing years
2024, 2023, 2022, 2021, 2020
NAICS
238900
Plan sponsors in NevadaConstruction

Benefit plans on file

YearFormPlan #Plan nameParticipants
2024Form 5500-SF001Mammoth Ug 401(K) Plan116
2024Form 5500502Aetna/Principal87
2023Form 5500-SF001Mammoth Ug 401(K) Plan117
2023Form 5500502Aetna/Principal0
2022Form 5500001Mammoth Ug 401(K) Plan118
2021Form 5500-SF001Mammoth Ug 401(K) Plan106
2020Form 5500-SF001Mammoth Ug 401(K) Plan88
2020Form 5500501Hpn/Principal—

Data shown as filed with the U.S. Department of Labor (EBSA), filing years 2020–2025; not validated by OpenERISA. View official filings for this EIN on the DOL EFAST2 search.

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