401(k) · DOL Form 5500 · 2023

Stillwater Mining Company 401(k) Plan

Data updated 2026-08-25

$156M
Total assets Near avg plan size
502
Participants Below avg headcount
94th
Percentile by assets National rank
$310,670
Avg per participant High balance/head
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Official DOL plan name: Stillwater Mining Company 401(k) Plan · Sponsored by Stillwater Mining Company · Montana · Mining & Oil Extraction

$156M in assets, 502 participants

Stillwater Mining Company's Stillwater Mining Company 401(k) Plan reported $156M in total assets and 502 participants in its 2023 DOL Form 5500 filing, ranking in the 94th 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.

  • #710 in Mining & Oil Extraction (811 peers)

Where Stillwater Mining Company 401(k) Plan sits by assets

Stillwater Mining Company 401(k) Plan sits in the top 10% of all filed plans by assets, $156M for 502 participants (~$310,670/participant), up 15.4% in 2023.

#710
in Mining & Oil Extraction (811 peers)
+15.4%
assets growth YoY
1.6×
vs typical plan assets (national mean)

Stillwater Mining Company 401(k) Plan's outsized position by total assets

Stillwater Mining Company 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2023 · DOL Form 5500

$155,956,138 Top 6% higher than 94% of 127,068 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 2023

Stillwater Mining Company 401(k) Plan among mid-size filed plans by headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Stillwater Mining Company 401(k) Plan sits mid-pack in the medium band (502 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Stillwater Mining Company 401(k) Plan reported net income rose from -$23M in the plan year 2022 filing to $16M in the plan year 2023 filing.
  • Stillwater Mining Company 401(k) Plan end-of-year assets rose from $135M in the plan year 2022 filing to $156M in the plan year 2023 filing.
  • Stillwater Mining Company 401(k) Plan reported participants fell from 539 in the plan year 2022 filing to 502 in the plan year 2023 filing.

See the national 2022→2023 release diff →

Published 5500 schedule card

Filing strip 810480654 · Stillwater Mining Company PY 2023 · 401(k)

Stillwater Mining Company 401(k) Plan · $156M · 502 · 94th

  • EBSA $156M
  • EBSA 502
  • EBSA 94th
  • EBSA 401(k)
  • EBSA near Confluent Health, LLC 401(k) Profit Sharing Plan
  • EBSA ind #710

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 Montana →

Stillwater Mining Company 401(k) Plan in the asset neighbourhood

Amundi US, Inc. Savings and Investment PlanAmundi US, Inc. Savings and …$156MStillwater Mining Company 401(k) PlanStillwater Mining Company 40…$156MConfluent Health, LLC 401(k) Profit Sharing PlanConfluent Health, LLC 401(k)…$156MVoya 401(k) Plan for Vriac AgentsVoya 401(k) Plan for Vriac A…$156MDavis Graham & Stubbs LLP Retirement PlanDavis Graham & Stubbs LLP Re…$156M
End-of-year total assets ($M) among Stillwater Mining Company 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Scale-class filing particulars (2023)

Total Assets (Beginning of Year)$135M
Net Assets (End of Year)$156M
Net Income$16M
Employer EIN810480654
Plan Effective Date1993-06-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Stillwater Mining Company)

Sponsor-wide plan assets over time

All Stillwater Mining Company plans reported in each filing year

Latest sponsor-wide plan assets
$431M 9.989406155149915% vs 2022
2024 filing year
$380M$400M$420M$440M$460M 202220232024 $392M $431M ▲ +10.0%
Year Plans Participants Total Assets
2022 2 1,975 $392M
2023 2 1,826 $436M
2024 2 1,810 $431M

Nearby 401(k) Plans in Montana

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

Stillwater Mining Company 401(k) Plan vs. nearby 401(k) plans in Montana, assets vs. participants Scatter plot of 6 data points. 010002000300040005000 100200300400500600 Total assets ($M) Participants Stillwater Mining Company 401(k) Plan, Total assets ($M): 155.956138 · Participants: 502Stillwater Mining Company 401(k) PlanD.a. Davidson Companies Retirement Savings and Profit Sharing Plan, Total assets ($M): 543.142005 · Participants: 1580D.a. Davidson Companies Retirement Savings and Profit Sharing PlanGlacier Bancorp, Inc. Profit Sharing and 401(k) Plan, Total assets ($M): 484.798151 · Participants: 3264Glacier Bancorp, Inc. Profit Sharing and 401(k) PlanNorthwestern Energy 401(k) Retirement Savings Plan, Total assets ($M): 462.756735 · Participants: 1529Northwestern Energy 401(k) Retirement Savings PlanFirst Interstate Bancsystem, Inc. 401(k) Plan, Total assets ($M): 453.618257 · Participants: 3750First Interstate Bancsystem, Inc. 401(k) PlanLogan Health Retirement Savings Plan, Total assets ($M): 436.597451 · Participants: 4232Logan Health Retirement Savings Plan
Stillwater Mining Company 401(k) Plan vs. nearby 401(k) plans in Montana, assets vs. participants
Compare Stillwater Mining Company 401(k) Plan side-by-side with 3 peers →

Stillwater Mining Company 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Montana, the nearest 401(k) by assets is Confluent Health, LLC 401(k) Profit Sharing Plan in KY ($156M); by covered participants it is Mariani Nut Company Inc. 401(k) Profit Sharing Plan in CA (502 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($156M here).

Similar participant headcount

Nearest other-state filings by covered participants (502 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Stillwater Mining Company 401(k) Plan assets move in 2023? ▼
Stillwater Mining Company 401(k) Plan grew sharply - up 15.4% during 2023, from $135M to $156M. Reported net income was $16M.
How have Stillwater Mining Company plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Stillwater Mining Company's sponsor-wide assets grew 10.0%, from $392M to $431M.
Where does Stillwater Mining Company 401(k) Plan rank by assets among Form 5500 filers? ▼
Stillwater Mining Company 401(k) Plan ranks in the 94th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top 10% of all filed plans by assets).
Which 401(k) plans are similar in size to Stillwater Mining Company 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Confluent Health, LLC 401(k) Profit Sharing Plan in KY ($156M, 8,987 participants).
Which 401(k) plans cover a similar participant headcount to Stillwater Mining Company 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Mariani Nut Company Inc. 401(k) Profit Sharing Plan in CA (502 participants, $25M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 810480654.

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.