Florida › Manufacturing › 100 to 249 participants
Form 5500 statement · plan year 1 Jan 2024 to 31 Dec 2024
Mainstream Engineering Corporation 401(k) Savings Plan
Sponsored by Mainstream Engineering Corporation, Rockledge, FL
Form 5500 information is as filed by the plan administrator with the Department of Labor and may be amended. Figures reflect the plan year shown, not current balances. Form 5500 contains no individual account balances. Look up the original filing at EFAST2.
Mainstream Engineering Corporation 401(k) Savings Plan is a 401(k) plan sponsored by Mainstream Engineering Corporation of Rockledge, Florida. For the plan year ending 31 Dec 2024 it reported 211 participants, 173 of them active, and net assets of $16.4M.
Net assets came to $77,770 per participant, well above the $60,185 median for defined contribution plans with 100 to 249 participants and above the $62,303 median for defined contribution plans in manufacturing. The figure is an average across everyone in the plan, including former employees with small balances; Form 5500 holds no individual account data.
The employer contributed $441K during the year, or $2,550 per active participant against a same-size median of $2,447; participants contributed $1.1M and $16K arrived as rollovers and other contributions. Benefits paid out totalled $757K.
Schedule C lists 1 service provider organisation paid $5,000 or more, with reported compensation of $17K: $79.88 per participant, well below the same-size median of $194. Administrative expenses charged to the plan were $17K. Schedule C does not capture every cost: fees netted from fund returns and fees the employer pays directly are outside it.
Across the filings on record, net assets went from $5.6M in 2014 to $16.4M in 2024 (up 194%), and participants from 131 to 211 (up 61%).
The independent accountant's opinion on the financial statements was unmodified (unqualified), from an audit whose scope was limited under ERISA section 103(a)(3)(C) to exclude investment information certified by a bank or insurer.
Compared with similar plans
| Measure | This plan | Same size | Same industry | All US DC plans |
|---|---|---|---|---|
| Net assets per participant | $77,770 | $60,185 | $62,303 | $53,102 |
| Employer contributions per active participant | $2,550 | $2,447 | $2,187 | $2,175 |
| Schedule C compensation per participant | $79.88 | $194 | $136 | $123 |
| Schedule C compensation, share of net assets | 0.10% | 0.32% | 0.24% | 0.26% |
| Administrative expenses per participant | $79.71 | $176 | $131 | $116 |
Peer columns are medians for plan year 2024 across defined contribution plans with 100 or more participants: 100 to 249 participants (21,996 plans), manufacturing (11,377) and all US plans (63,460). Fee medians cover plans that report an amount.
Trend by plan year
| Plan year | Participants | Net assets | Per participant | Employer contributions | Participant contributions | Schedule C compensation |
|---|---|---|---|---|---|---|
| 2024 | 211 | $16.4M | $77,768 | $441K | $1.1M | $17K |
| 2023 | 197 | $13.8M | $69,975 | $388K | $948K | $24K |
| 2022 | 165 | $11.3M | $68,430 | $374K | $839K | $21K |
| 2021 | 154 | $13.7M | $88,760 | $354K | $866K | $13K |
| 2020 | 142 | $11.2M | $79,007 | $312K | $771K | $12K |
| 2019 | 129 | $9.4M | $72,698 | $313K | $667K | $11K |
| 2018 | 121 | $7.4M | $61,198 | $327K | $652K | $16K |
| 2017 | 117 | $7.8M | $66,299 | $298K | $597K | $16K |
| 2016 | 123 | $6.0M | $49,024 | $283K | $567K | $20K |
| 2015 | 135 | $5.5M | $40,519 | $101K | $487K | $15K |
| 2014 | 131 | $5.6M | $42,542 | $448K | $462K | $25K |
Years in which the plan filed the full Form 5500 with 100 or more participants, from 2009. Plan year is the year in which the plan year began.
Statement for the year
- Net assets, beginning of year$13,785,411
- Employer contributions$441,165
- Participant contributions$1,062,893
- Rollovers and other contributions$16,223
- Total contributions$1,520,281
- Total income, including investment results$3,398,164
- Benefits paid$757,327
- Administrative expenses$16,818
- Total expenses$774,145
- Net income$2,624,019
- Net transfers$0
- Net assets, end of year$16,409,430
Participants
- Active participants173
- Retired or separated, receiving benefits0
- Retired or separated, entitled to future benefits38
- Participants with account balances180
- Total participants, end of year211
Fees and service providers
| Organisation | Services reported | Direct | Indirect |
|---|---|---|---|
| Principal Life Insurance Company | Contract Administrator; Participant loan processing | $16,855 | $0 |
Schedule C, Part I line 2: providers that received $5,000 or more, with the form's own service codes. Individuals named on Schedule C (plan employees, individual trustees) are never shown and their compensation is excluded. Eligible indirect compensation disclosed by formula carries no dollar amount. See how to read Schedule C fees.
Administrative expenses on Schedule H
- Contract administrator fees$16,818
- Total administrative expenses$16,818
Investment structure
Assets at year end by Schedule H category. The form shows the kind of vehicle holding the money, not the funds on the menu.
- Pooled separate accounts$16.1M · 98.2%
- Insurance company general account$160K · 1.0%
- Participant loans$138K · 0.8%
Audit and compliance answers, as filed
- Accountant's opinionUnmodified (unqualified)
- Audit scope limited under ERISA section 103(a)(3)(C)Yes
- Accounting firmCarr, Riggs & Ingram L.L.C.
- Participant contributions reported as transmitted lateNo
- Covered by a fidelity bondYes, $500,000
- Blackout period during the yearNo
These are the plan administrator's own answers on Schedule H, Part IV. A reported late transmittal is the filer's disclosure of a timing lapse, usually corrected through the Department of Labor's voluntary program; the amount is the total involved, not a loss.
Plan characteristics
2EProfit-sharing plan2FERISA section 404(c) plan2GTotal participant-directed account plan2JCode section 401(k) feature2KCode section 401(m) arrangement2TTotal or partial participant-directed account plan with a default investment account3DPre-approved pension plan
Codes entered on Form 5500 line 8a, with the labels from the official instructions. Business code 333410: Ventilation, Heating, Air-Conditioning, & Commercial Refrigeration Equipment Mfg.
Similar plans in Florida
| Plan | Sponsor | Participants | Net assets | Per participant |
|---|---|---|---|---|
| Flextrude Aluminum Shapes 401(k) Plan | Flextrude Aluminum Shapes LLC | 212 | $1.6M | $7,637 |
| Diamondback Manufacturing LLC 401(k) Profit Sharing Plan & Trust | Diamondback Manufacturing LLC | 209 | $3.5M | $16,975 |
| Syn-Tech Systems Retirement Plan | Syn-Tech Systems, Inc. | 216 | $42.8M | $198,089 |
| S. S. White Employees 401(k) Savings Plan | S. S. White Technologies, Inc. | 206 | $4.8M | $23,267 |
| Neocis 401(k) Plan | Neocis, Inc. | 216 | $10.0M | $46,200 |
| Dosal Tobacco Corporation 401(k) Plan | Dosal Tobacco Corporation | 206 | $18.4M | $89,452 |
Defined contribution plans in manufacturing closest in size.
Questions and answers
How big is Mainstream Engineering Corporation 401(k) Savings Plan?
211 participants at the end of the plan year ending 31 Dec 2024, of whom 173 were active employees, with net assets of $16,409,430. Among defined contribution plans that places it in the 100 to 249 participants band, which held 21,996 plans in plan year 2024.
What does Mainstream Engineering Corporation contribute per participant?
The filing reports $441,165 in employer contributions for the year, which is $2,550 per active participant; the median for plans of the same type and size was $2,447 in plan year 2024. Form 5500 reports the total only. It does not state the match formula, and the per-participant figure is an average, not any one person's contribution.
What fees does the plan pay and how do they compare?
Schedule C reports $16,855 in compensation to service provider organisations, $79.88 per participant or 0.10% of net assets. The same-size median among plans reporting any Schedule C compensation was $194 per participant. Administrative expenses on Schedule H were $16,818. Investment costs deducted inside mutual funds and other pooled vehicles are not itemised on Form 5500, so these figures are a floor rather than a full cost.
Who runs the plan?
The sponsor is Mainstream Engineering Corporation. Recordkeeping or administration: Principal Life Insurance Company. The financial statements were audited by Carr, Riggs & Ingram L.L.C.. Form 5500 also names the plan administrator's signer and other individuals; this site publishes organisations only.
Was the audit opinion unqualified?
The filing reports an unmodified (unqualified) opinion from a limited-scope audit, in which the accountant did not audit investment information certified by a bank or insurance company. Unmodified (formerly "unqualified") is the standard clean opinion.
How current is this, and does it show my balance?
This is the Form 5500 for the plan year 1 Jan 2024 to 31 Dec 2024, received by the Department of Labor on 25 Sep 2025. Filings are due seven months after the plan year ends, or nine and a half with an extension, so the public record always runs a year or more behind. It contains plan-level totals only: no individual balances, contributions or names of participants exist in the data.
Provenance
Source: U.S. Department of Labor, Employee Benefits Security Administration, Form 5500 research files (Form 5500, Schedule H, Schedule C) for plan years 2009 to 2025, public domain, with filings received through 24 Aug 2026. This page shows the latest filing on record for EIN 59-2744408, plan 002, received 25 Sep 2025; an amended filing replaces it at the next build. Medians and percentiles are computed by this site; see the methodology. Report an error through corrections.