401(k) · DOL Form 5500 · 2024

Mp Materials Corp. 401(k) Plan

Data updated 2026-08-25

$23M
Total assets Small plan by assets
683
Participants Below avg headcount
73rd
Percentile by assets National rank
$34,126
Avg per participant Low balance/head
PlainRetire home → About this data RSS: change history

Official DOL plan name: Mp Materials Corp. 401(k) Plan · Sponsored by Mp Materials Corp. · Nevada · Mining & Oil Extraction

$23M in assets, 683 participants

Mp Materials Corp.'s Mp Materials Corp. 401(k) Plan reported $23M in total assets and 683 participants in its 2024 DOL Form 5500 filing, ranking in the 73rd percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.

  • #440 in Mining & Oil Extraction (785 peers)

Mp Materials Corp. multi-year trail

Mp Materials Corp.'s plans moved +234.4% in assets from 2022 to 2024; this filing shows Mp Materials Corp. 401(k) Plan at $23M / 683 participants.

#440
in Mining & Oil Extraction (785 peers)
+69.7%
assets growth YoY

Mp Materials Corp. 401(k) Plan's outsized position by total assets

Mp Materials Corp. 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2024 · DOL Form 5500

$23,307,870 Top 27% higher than 73% of 123,620 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2024

Mp Materials Corp. 401(k) Plan among mid-size filed plans by headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Mp Materials Corp. 401(k) Plan sits mid-pack in the medium band (683 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Mp Materials Corp. 401(k) Plan end-of-year assets rose from $14M in the plan year 2023 filing to $23M in the plan year 2024 filing.
  • Mp Materials Corp. 401(k) Plan reported net income rose from $7M in the plan year 2023 filing to $10M in the plan year 2024 filing.
  • Mp Materials Corp. 401(k) Plan reported participants rose from 485 in the plan year 2023 filing to 683 in the plan year 2024 filing.

See the national 2023→2024 release diff →

Published 5500 schedule card

Filing strip 844465489 · Mp Materials Corp. PY 2024 · 401(k)

Mp Materials Corp. 401(k) Plan · $23M · 683 · 73rd

  • PHOTO $23M
  • IND 683
  • EOY 73rd
  • 5500 401(k)
  • ASSETS near Peco Pallet Inc. 401(k) Plan
  • PCT ind #440

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Mining & Oil Extraction retirement plans → · Plans in Nevada →

Mp Materials Corp. 401(k) Plan in the asset neighbourhood

Mp Materials Corp. 401(k) PlanMp Materials Corp. 401(k) Pl…$23MPeco Pallet Inc. 401(k) Plan$23MGencor Industries, Inc. Retirement Savings PlanGencor Industries, Inc. Reti…$23MJ.W. Pepper & Son, Inc. 401(k) Savings and Investment PlanJ.W. Pepper & Son, Inc. 401(…$23MFirst State Bank Southwest Ksop Plan and TrustFirst State Bank Southwest K…$23M
End-of-year total assets ($M) among Mp Materials Corp. 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Mp Materials Corp. multi-year asset trail

Sponsor-wide plan assets over time

All Mp Materials Corp. plans reported in each filing year

Latest sponsor-wide plan assets
$23M 234.39605723788293% vs 2022
2024 filing year
$5M$10M$15M$20M$25M 202220232024 $6.97M $23.3M ▲ +234.4%
Year Plans Participants Total Assets
2022 1 340 $7M
2023 1 485 $14M
2024 1 683 $23M

Mp Materials Corp. filing trail (2024)

Total Assets (Beginning of Year)$14M
Net Assets (End of Year)$23M
Net Income$10M
Employer EIN844465489
Plan Effective Date2018-05-01
Filing StatusFILING RECEIVED

Nearby 401(k) Plans in Nevada

Peer 401(k) plans, same state, same plan type, ranked by total assets.

Mp Materials Corp. 401(k) Plan vs. nearby 401(k) plans in Nevada, assets vs. participants Scatter plot of 6 data points. -200000200004000060000 -0.500.511.522.5 Total assets ($B) Participants Mp Materials Corp. 401(k) Plan, Total assets ($B): 0.02330787 · Participants: 683Mp Materials Corp. 401(k) PlanThe Mgm Resorts 401(k) Savings Plan, Total assets ($B): 2.241956368 · Participants: 37719The Mgm Resorts 401(k) Savings PlanCaesars Entertainment, Inc 401(k) Plan, Total assets ($B): 1.939824866 · Participants: 46859Caesars Entertainment, Inc 401(k) PlanBarrick Retirement Plan, Total assets ($B): 1.341794728 · Participants: 7327Barrick Retirement PlanEighth District Electrical Pension Fund Annuity Plan, Total assets ($B): 1.127663414 · Participants: 21516Eighth District Electrical Pension Fund Annuity PlanNv Energy 401(k) Plan, Total assets ($B): 1.125514142 · Participants: 2669Nv Energy 401(k) Plan
Mp Materials Corp. 401(k) Plan vs. nearby 401(k) plans in Nevada, assets vs. participants
Compare Mp Materials Corp. 401(k) Plan side-by-side with 3 peers →

Mp Materials Corp. 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Nevada, the nearest 401(k) by assets is Peco Pallet Inc. 401(k) Plan in NY ($23M); by covered participants it is Iaero Airways 401(k) Plan in NC (683 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (683 participants); asset peers above are excluded.

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Mp Materials Corp. 401(k) Plan assets move in 2024? ▼
Mp Materials Corp. 401(k) Plan surged - up 69.7% during 2024, from $14M to $23M. Reported net income was $10M.
How have Mp Materials Corp. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Mp Materials Corp.'s sponsor-wide assets grew 234.4%, from $7M to $23M.
Which 401(k) plans are similar in size to Mp Materials Corp. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Peco Pallet Inc. 401(k) Plan in NY ($23M, 416 participants).
Which 401(k) plans cover a similar participant headcount to Mp Materials Corp. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Iaero Airways 401(k) Plan in NC (683 participants, N/A in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 844465489.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.