MULTISTACK, LLC is a air-conditioning and warm air heating equipment and commercial and industrial refrigeration equipment manufacturing employer in SPARTA, WI. Federal records show 2 OSHA inspections with 15 violations and $53,051 in penalties. All data sourced from public federal enforcement records.

Data sourced from OSHA, DOL WHD, MSHA, EPA ECHO, NLRB, FMCSA, OFLC, BLS, SAM.gov, CMS, USAspending, CPSC, NHTSA, and the UVA Corporate Prosecution Registry. Last updated: April 29, 2026.

MULTISTACK, LLC

1065 MAPLE AVENUE, SPARTA, WI, 54656

Parent: Multistack LLC (2 locations)

333415 — Top companies in Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing

EIN: 721524879

130 employees

Federal Enforcement

OSHA inspections

15 violations

$53,051 in penalties

Industry Benchmark

Industry Avg TRIR

2.1

Industry Avg DART

1.1

Self-Reported DART

2.4

Self-Reported TRIR

10.4

Industry rates from BLS SOII 2024. Self-reported rates from OSHA ITA Form 300A (employer self-reported).

OSHA Inspections

OSHA Violations

Total Penalties

$53,051

Trend

IMPROVING

WHD Cases

Back Wages Owed

Confidence

MEDIUM

SVEP Flag

Yes

Data Insights

History Span

16 years

Last Activity

2yr ago

Inspection Rate

0.1/yr

Violation Rate

0.9/yr

Violation Severity Mix

73% serious$3,537 avg per violation$26,526 avg per inspection

Active Agencies:

OSHA$53,051 total across all agencies

TRIR vs Industry Avg

+8.3

Above industry average

DART vs Industry Avg

+1.3

Above industry average

Federal Contracts (5-year)

Total Obligated

$837,171

Contracts

Top Agency

Department of State

$837,171

Primary NAICS: 333415 - AIR-CONDITIONING AND WARM AIR HEATING EQUIPMENT AND COMMERCIAL AND INDUSTRIAL REFRIGERATION EQUIPMENT MANUFACTURING

Last Action: 2025-04-22

Source: USAspending.gov prime contract awards. Net obligations (awards minus deobligations) over the last five fiscal years.

Inspection Breakdown

Complaint

Complaint and accident-triggered inspections are stronger risk signals than routine planned inspections.

Violation rate: 100% of inspections

Recidivism: 2 inspections with serious+ violations

Peer Comparison

98%

Worse than most peers

vs 56 employers in same industry & state

Fewer violationsMore violations

Penalty Percentile

100%

Inspection Frequency Percentile

60%

Motor Carrier Safety (FMCSA)

DOT Number

3178785

Operation Type

Federal Motor Carrier Safety Administration — DOT-regulated carrier registration and fleet data.

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Inspection History

No inspection records found.

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Data aggregated from public federal enforcement and program records (OSHA, WHD, MSHA, EPA, NLRB, FMCSA, OFLC, BLS, SAM.gov, CMS, USAspending, CPSC, NHTSA) plus the UVA Corporate Prosecution Registry. Employer profiles matched by name and location — matching errors may occur. Risk scores computed by FastDOL, not official government assessments. OSHA citations typically appear 3-8 months after the inspection, so very recent enforcement actions may not yet be reflected. Data provided as-is. Report a data error.

Frequently Asked Questions

What is MULTISTACK, LLC's OSHA violation history?: MULTISTACK, LLC has 2 OSHA inspections on record with 15 violations and $53,051 in total penalties.
How does MULTISTACK, LLC's safety record compare to its industry?: MULTISTACK, LLC operates in the air-conditioning and warm air heating equipment and commercial and industrial refrigeration equipment manufacturing industry. The industry average Total Recordable Incident Rate (TRIR) is 2.1. MULTISTACK, LLC's self-reported DART rate is 2.4 compared to an industry average of 1.1.