How big is Mainstream Fluid & Air LLC's plan?

Mainstream Fluid & Air LLC's plan reported $341K in assets and 35 participants for 2025.

Original filing (PDF)20260522113242NAL0003203761001

Mainstream Fluid & Air LLC

Name: Mainstream Fluid & Air LLC — Form 5500 (2025)
Creator: Mainstream Fluid & Air LLC
License: https://www.usa.gov/government-works

Form 5500-SF

FILING_RECEIVED

401(k) retirement plan · Mainstream Fluid & Air LLC held $341K in plan assets for 35 participants in 2025.

Active participants

Accounts w/ balance

Plan assets (EOY)

$341K

Net assets (EOY)

$341K

People on this filing

Jim Markham signed Mainstream Fluid & Air LLC's 2025 Form 5500 as plan administrator.

Jim Markham — Plan Administrator — Form 5500 signer

Get verified email & phone for these signers

Signer names are public record from the Form 5500 e-signature.

Plan identifiers

Mainstream Fluid & Air LLC's EIN is 04-3784128.

EIN 04-3784128

Plan number 001

Plan year 2025

ACK ID 20260522113242NAL0003203761001

Official Form 5500 document

Download the official 2025 Form 5500 (PDF) for Mainstream Fluid & Air LLC from the U.S. Department of Labor's EFAST2 system.

Download the official 2025 Form 5500 (PDF)

Plan features

Mainstream Fluid & Air LLC's plan includes profit-sharing, ERISA 404(c) participant direction, a 401(k) feature, a default investment (QDIA).

Decision-maker contacts

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Plan health score

Above-average plan

Directional indicator from public Form 5500 data — compliance & integrity, total plan cost, participant health and vendor stack, benchmarked against same-size peers. Not a fiduciary tool. Based on 70% of scoring inputs for this filing.

Compliance & integrity

100

Total plan cost

n/a

Plan health

Vendor & structure

100

Knocking points off

Low account-holder ratio — balance-holders per active participant in the bottom quartile of peers (18th percentile).

Helping the score

Cost not scored — no comparable Schedule H expense data for this cohort.

Plan sponsor

Name

MAINSTREAM FLUID & AIR LLC

EIN

all filings

Address

47 RUSSO PL · BERKELEY HTS, NJ · 07922

Phone

(908) 931-1712

Industry

Manufacturing

Plan administrator

Same as plan sponsor.

Plan characteristics

Plan number

001

Plan year

2025

Plan year begin

2025-01-01

Tax period

2025-12-31

Filed

2026-05-22

Pension benefit codes

2E · Profit-sharing

2F · ERISA section 404(c)

2G · Total participant-directed accounts

2J · 401(k) feature

2K · 401(m) arrangement

2T · Default investment account (QDIA)

3D · Pre-approved plan (master / prototype / VS)

Audit & trust (Schedule H)

Service providers (Schedule C)

Small plans don't disclose service providers

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