Current Snapshot
Latest Year
2025
2025 Participants
890
2025 Assets
$23,307,870
2025 Contributions
$9,232,794
Historical Graphs
Total Assets Over Time
Aggregate end-of-year assets by filing year, excluding zero-asset years
Participants Over Time
Largest reported end-of-year plan headcount by filing year, used to avoid double-counting participants across overlapping plans
Company Timeline
Year summaries and individual filings are combined here so you can stay in one place while moving across years and plan filings.
| Year / Filing | Filings | Participants | Assets | Contributions | Contrib./Participant |
|---|---|---|---|---|---|
| 2025 | 1 | 890 | $0 | $0 | - |
| Mp Materials Health Plan | - | 890 | - | - | - |
| 2024 | 2 | 781 | $23,307,870 | $9,232,794 | $11,822iApproximate average salary by contribution assumption: employee only about $295,544 at 4% or $197,029 at 6%; with 50% employer match about $197,029 at 4% or $131,353 at 6%; with 100% employer match about $147,772 at 4% or $98,515 at 6%. |
| Mp Materials Corp. 401(K) Plan | - | 781 | $23,307,870 | $9,232,794 | $11,822iApproximate average salary by contribution assumption: employee only about $295,544 at 4% or $197,029 at 6%; with 50% employer match about $197,029 at 4% or $131,353 at 6%; with 100% employer match about $147,772 at 4% or $98,515 at 6%. |
| Mp Materials Health Plan | - | 690 | - | - | - |
| 2023 | 2 | 671 | $13,738,480 | $5,850,306 | $8,719iApproximate average salary by contribution assumption: employee only about $217,970 at 4% or $145,313 at 6%; with 50% employer match about $145,313 at 4% or $96,875 at 6%; with 100% employer match about $108,985 at 4% or $72,657 at 6%. |
| Mp Materials Corp. 401(K) Plan | - | 666 | $13,738,480 | $5,850,306 | $8,784iApproximate average salary by contribution assumption: employee only about $219,606 at 4% or $146,404 at 6%; with 50% employer match about $146,404 at 4% or $97,603 at 6%; with 100% employer match about $109,803 at 4% or $73,202 at 6%. |
| Mp Materials Health Plan | - | 671 | - | - | - |
| 2022 | 1 | 342 | $6,970,139 | $3,132,950 | $9,161iApproximate average salary by contribution assumption: employee only about $229,017 at 4% or $152,678 at 6%; with 50% employer match about $152,678 at 4% or $101,785 at 6%; with 100% employer match about $114,508 at 4% or $76,339 at 6%. |
| Mp Materials Corp. 401(K) Plan | - | 342 | $6,970,139 | $3,132,950 | $9,161iApproximate average salary by contribution assumption: employee only about $229,017 at 4% or $152,678 at 6%; with 50% employer match about $152,678 at 4% or $101,785 at 6%; with 100% employer match about $114,508 at 4% or $76,339 at 6%. |