401(k) · DOL Form 5500 · 2023

Mack Energy Corporation 401(k) Plan

Data updated 2026-08-25

$57M
Total assets Below avg plan size
108
Participants Small participant base
87th
Percentile by assets National rank
$529,069
Avg per participant High balance/head
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Official DOL plan name: Mack Energy Corporation 401(k) Plan · Sponsored by Mack Energy Corporation · New Mexico · Mining & Oil Extraction

$57M in assets, 108 participants

Mack Energy Corporation's Mack Energy Corporation 401(k) Plan reported $57M in total assets and 108 participants in its 2023 DOL Form 5500 filing, ranking in the 87th 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.

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

Coverage in New Mexico

Mack Energy Corporation 401(k) Plan covers 108 participants in New Mexico, about 30% of the average New Mexico filer (state average ~365 per filing). Assets: $57M.

#607
in Mining & Oil Extraction (811 peers)
+14.8%
assets growth YoY
0.6×
vs typical plan assets (national mean)

Mack Energy Corporation 401(k) Plan's outsized position by total assets

Mack Energy Corporation 401(k) Plan vs every filed plan by assets

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

$57,139,485 Top 13% higher than 87% 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

Mack Energy Corporation 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. Mack Energy Corporation 401(k) Plan sits mid-pack in the medium band (108 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Mack Energy Corporation 401(k) Plan reported net income rose from -$9M in the plan year 2022 filing to $7M in the plan year 2023 filing.
  • Mack Energy Corporation 401(k) Plan end-of-year assets rose from $50M in the plan year 2022 filing to $57M in the plan year 2023 filing.
  • Mack Energy Corporation 401(k) Plan reported participants fell from 111 in the plan year 2022 filing to 108 in the plan year 2023 filing.

See the national 2022→2023 release diff →

Plan-year Form 5500 strip

Filing strip 850381433 · Mack Energy Corporation PY 2023 · 401(k)

Mack Energy Corporation 401(k) Plan · $57M · 108 · 87th

  • EBSA $57M
  • PART 108
  • TYPE 87th
  • NET 401(k)
  • BOOK near Rco Engineering, Inc. 401(k) Plan
  • VS-ST ind #607

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 New Mexico →

Mack Energy Corporation 401(k) Plan in the asset neighbourhood

Rco Engineering, Inc. 401(k) PlanRco Engineering, Inc. 401(k)…$57MBaker Engineering and Risk Consultants 401(k) Profit Sharing PlanBaker Engineering and Risk C…$57MServisfirst Bank 401(k) Profit Sharing Plan and TrustServisfirst Bank 401(k) Prof…$57MMack Energy Corporation 401(k) PlanMack Energy Corporation 401(…$57MDana Investment Advisors, Inc. Profit Sharing & 401(k) PlanDana Investment Advisors, In…$57M
End-of-year total assets ($M) among Mack Energy Corporation 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

New Mexico filing particulars

Total Assets (Beginning of Year)$50M
Net Assets (End of Year)$57M
Net Income$7M
Employer EIN850381433
Plan Effective Date2000-02-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Mack Energy Corporation)

Sponsor-wide plan assets over time

All Mack Energy Corporation plans reported in each filing year

Latest sponsor-wide plan assets
$115M 28.635075367043576% vs 2022
2024 filing year
$80M$90M$100M$110M$120M 202220232024 $89.2M $115M ▲ +28.6%
Year Plans Participants Total Assets
2022 2 218 $89M
2023 2 214 $102M
2024 2 186 $115M

Nearby 401(k) Plans in New Mexico

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

Mack Energy Corporation 401(k) Plan vs. nearby 401(k) plans in New Mexico, assets vs. participants Scatter plot of 6 data points. -500005000100001500020000 -202468 Total assets ($B) Participants Mack Energy Corporation 401(k) Plan, Total assets ($B): 0.057139485 · Participants: 108Mack Energy Corporation 401(k) PlanNtess Savings and Income Plan, Total assets ($B): 6.138288212 · Participants: 14721Ntess Savings and Income PlanTriad 401(k) Retirement Plan, Total assets ($B): 2.017061751 · Participants: 10005Triad 401(k) Retirement PlanTriad 401(k) Savings Plan, Total assets ($B): 0.83962508 · Participants: 2249Triad 401(k) Savings PlanPnm Resources, Inc. Retirement Savings Plan, Total assets ($B): 0.76542965 · Participants: 1531Pnm Resources, Inc. Retirement Savings PlanApplied Research Associates, Inc. 401(k) Profit Sharing Plan & Trust, Total assets ($B): 0.573005592 · Participants: 1962Applied Research Associates, Inc. 401(k) Profit Sharing Plan & Trust
Mack Energy Corporation 401(k) Plan vs. nearby 401(k) plans in New Mexico, assets vs. participants
Compare Mack Energy Corporation 401(k) Plan side-by-side with 3 peers →

Mack Energy Corporation 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside New Mexico, the nearest 401(k) by assets is Rco Engineering, Inc. 401(k) Plan in MI ($57M); by covered participants it is Winstar Farm 401(k) Plan in KY (108 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (108 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 Mack Energy Corporation 401(k) Plan assets move in 2023? ▼
Mack Energy Corporation 401(k) Plan grew at a solid clip - up 14.8% during 2023, from $50M to $57M. Reported net income was $7M.
How have Mack Energy Corporation plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Mack Energy Corporation's sponsor-wide assets grew 28.6%, from $89M to $115M.
Where does Mack Energy Corporation 401(k) Plan rank by assets among Form 5500 filers? ▼
Mack Energy Corporation 401(k) Plan ranks in the 87th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top quartile of all filed plans by assets).
Which 401(k) plans are similar in size to Mack Energy Corporation 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Rco Engineering, Inc. 401(k) Plan in MI ($57M, 594 participants).
Which 401(k) plans cover a similar participant headcount to Mack Energy Corporation 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Winstar Farm 401(k) Plan in KY (108 participants, $4M 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 850381433.

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.