401(k) · DOL Form 5500 · 2023

Mainstream Engineering Corporation 401(k) Plan

Data updated 2026-08-25

$14M
Total assets Small plan by assets
122
Participants Small participant base
65th
Percentile by assets National rank
$112,995
Avg per participant Below avg balance/head
PlainRetire home → About this data RSS: change history

Official DOL plan name: Mainstream Engineering Corporation 401(k) Savings Plan · Sponsored by Mainstream Engineering Corporation · Florida · Manufacturing

$14M in assets, 122 participants

Mainstream Engineering Corporation's Mainstream Engineering Corporation 401(k) Savings Plan reported $14M in total assets and 122 participants in its 2023 DOL Form 5500 filing, ranking in the 65th 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.

  • #10,007 in Manufacturing (18,722 peers)

Coverage in Florida

Mainstream Engineering Corporation 401(k) Savings Plan covers 122 participants in Florida, about 19% of the average Florida filer (state average ~628 per filing). Assets: $14M.

#10,007
in Manufacturing (18,722 peers)
+22.1%
assets growth YoY

Mainstream Engineering Corporation 401(k) Savings Plan's mid-pack asset rank among Manufacturing and all filers

Mainstream Engineering Corporation 401(k) Savings Plan vs every filed plan by assets

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

$13,785,411 Top 35% higher than 65% 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

Mainstream Engineering Corporation 401(k) Savings 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. Mainstream Engineering Corporation 401(k) Savings Plan sits mid-pack in the medium band (122 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Mainstream Engineering Corporation 401(k) Savings Plan reported net income rose from -$2M in the plan year 2022 filing to $2M in the plan year 2023 filing.
  • Mainstream Engineering Corporation 401(k) Savings Plan end-of-year assets rose from $11M in the plan year 2022 filing to $14M in the plan year 2023 filing.
  • Mainstream Engineering Corporation 401(k) Savings Plan reported participants fell from 124 in the plan year 2022 filing to 122 in the plan year 2023 filing.

See the national 2022→2023 release diff →

DOL schedule card

Filing strip 592744408 · Mainstream Engineering Corporation PY 2023 · 401(k)

Mainstream Engineering Corporation 401(k) Savings Plan · $14M · 122 · 65th

  • PART $14M
  • PART 122
  • PART 65th
  • PART 401(k)
  • PART near Pearson Dental Supplies, Inc. 401(k) Plan
  • PART ind #10007

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 Manufacturing retirement plans → · Plans in Florida →

Mainstream Engineering Corporation 401(k) Savings Plan in the asset neighbourhood

Mainstream Engineering Corporation 401(k) Savings PlanMainstream Engineering Corpo…$14MPearson Dental Supplies, Inc. 401(k) PlanPearson Dental Supplies, Inc…$14MAluminum Trailer Company 401(k) PlanAluminum Trailer Company 401…$14MHills & Dales Child Development Center 401(k) PlanHills & Dales Child Developm…$14MThree Way 401(k) Plan$14M
End-of-year total assets ($M) among Mainstream Engineering Corporation 401(k) Savings Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Florida filing particulars

Total Assets (Beginning of Year)$11M
Net Assets (End of Year)$14M
Net Income$2M
Employer EIN592744408
Plan Effective Date1994-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Mainstream Engineering Corporation)

Sponsor-wide plan assets over time

All Mainstream Engineering Corporation plans reported in each filing year

Latest sponsor-wide plan assets
$16M 45.33470034769944% vs 2022
2024 filing year
$10M$12M$14M$16M$18M 202220232024 $11.3M $16.4M ▲ +45.3%
Year Plans Participants Total Assets
2022 1 124 $11M
2023 1 122 $14M
2024 1 153 $16M

Nearby 401(k) Plans in Florida

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

Mainstream Engineering Corporation 401(k) Savings Plan vs. nearby 401(k) plans in Florida, assets vs. participants Scatter plot of 6 data points. -1000000100000200000300000400000 -505101520 Total assets ($B) Participants Mainstream Engineering Corporation 401(k) Savings Plan, Total assets ($B): 0.013785411 · Participants: 122Mainstream Engineering Corporation 401(k) Savings PlanL3harris Retirement Savings Plan, Total assets ($B): 15.384363901 · Participants: 40665L3harris Retirement Savings PlanSavings Plan for Employees and Partners of Pwc, Total assets ($B): 11.333196569 · Participants: 50817Savings Plan for Employees and Partners of PwcAdp Totalsource Retirement Savings Plan, Total assets ($B): 8.025816173 · Participants: 308867Adp Totalsource Retirement Savings PlanTrinet 401(k) Plan, Total assets ($B): 7.029692551 · Participants: 157945Trinet 401(k) PlanPublix Super Markets, Inc. 401(k) Smart Plan, Total assets ($B): 6.572590596 · Participants: 184674Publix Super Markets, Inc. 401(k) Smart Plan
Mainstream Engineering Corporation 401(k) Savings Plan vs. nearby 401(k) plans in Florida, assets vs. participants
Compare Mainstream Engineering Corporation 401(k) Savings Plan side-by-side with 3 peers →

Mainstream Engineering Corporation 401(k) Savings Plan's out-of-state 401(k) peers by assets and headcount

Outside Florida, the nearest 401(k) by assets is Pearson Dental Supplies, Inc. 401(k) Plan in CA ($14M); by covered participants it is G & L Davis Meat Co. Inc. 401(k) Plan in NY (122 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($14M here).

Similar participant headcount

Nearest other-state filings by covered participants (122 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 Mainstream Engineering Corporation 401(k) Savings Plan assets move in 2023? ▼
Mainstream Engineering Corporation 401(k) Savings Plan grew sharply - up 22.1% during 2023, from $11M to $14M. Reported net income was $2M.
How have Mainstream Engineering Corporation plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Mainstream Engineering Corporation's sponsor-wide assets grew 45.3%, from $11M to $16M.
Which 401(k) plans are similar in size to Mainstream Engineering Corporation 401(k) Savings Plan? ▼
Among 401(k) plans in other states, the closest by assets is Pearson Dental Supplies, Inc. 401(k) Plan in CA ($14M, 222 participants).
Which 401(k) plans cover a similar participant headcount to Mainstream Engineering Corporation 401(k) Savings Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is G & L Davis Meat Co. Inc. 401(k) Plan in NY (122 participants, $12M 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 592744408.

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.