Facility	City	Industry	Status	Distance
Wirtz Manufacturing Co, Inc	Post Huron	Industrial Machinery Manufacturing 333298	UNVERIFIED	0.0 KM
Wirtz Mfg CO INC Plant 1	Port Huron	Industrial Machinery Manufacturing 333249	LIKELY ACTIVE	0.0 KM
Wirtz Manufacturing Co., INC. Plant 4	Port Huron	All Other Industrial Machinery Manufacturing 333248	UNVERIFIED	0.6 KM
Engineered Plastic Components Inc.	Saint Clair	All Other Industrial Machinery Manufacturing 333248	LIKELY ACTIVE	14.3 KM
Engineered Plastic Components Inc.	St Clair	All Other Industrial Machinery Manufacturing 333248	LIKELY ACTIVE	14.3 KM

Every listed plant in St. Clair County

Also at this address

More than one federal record exists for this street address. The primary record for the site is listed first.

Wirtz Mfg CO INC Plant 1

Port Huron, MI

LIKELY ACTIVE333249

Where this record comes from

2 sources hold this plant, and 3 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.

OSHA injury and illness reportsOPERATING
Record 1245991 · first seen DEC 2025 · last seen DEC 2025
DOL Form 5500 retirement plan filingsOPERATING
Record 381491059|MI|48061|1105 twenty fourth st · first seen DEC 2024 · last seen DEC 2024

IN ST. CLAIR COUNTY9 other plants share this one’s industry (Industrial Machinery Manufacturing, NAICS 3332); 6 of them have a size band on record.

What each source says

Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

Coordinates: Census geocoder: 42.97155591791,-82.452723630157 · JUL 2026
Employees (band): OSHA: 100-499 · DEC 2025
Retirement plan filing (Form 5500): DOL: 0 active participants, plan year ending 2024-12-31, 1 plan(s) · DEC 2024

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