EntityWire

EntityWire / EIN 38-2144267

Employer with a benefit plan

SEMCO ENERGY, INC.

EIN 38-2144267. What DOL Form 5500 filings (EFAST2) and SEC EDGAR company filings say about this entity, with the source and date on every fact. Latest record 2025-11-06.

Employer with a benefit plan ยท SEC filer

SEMCO ENERGY, INC.

Also filed as SOUTHEASTERN MICHIGAN GAS ENTERPRISES INC

1411 THIRD STREET, STE A, PORT HURON, MI 48060

EIN

38-2144267

Benefit plan 521, 2024 filing

SEMCO ENERGY, INC. RETIREE MEDICAL PLAN

DOL · 2025-11-06

Participants (start of year)

249

DOL · 2025-11-06

Plan features

code 4A4D

DOL · 2025-11-06

Plan type

Single-employer plan

DOL · 2025-11-06

Business code (NAICS)

221210

DOL · 2025-11-06

Benefit plan 10, 2024 filing

SEMCO ENERGY, INC. NON-UNION EMPLOYEES' RETIREMENT PLAN

DOL · 2025-10-13

Participants (start of year)

455

DOL · 2025-10-13

Plan features

code 1A1E3H

DOL · 2025-10-13

Plan type

Single-employer plan

DOL · 2025-10-13

Business code (NAICS)

221210

DOL · 2025-10-13

Benefit plan 2, 2024 filing

SEMCO ENERGY, INC. UNION EMPLOYEES' RETIREMENT PLAN

DOL · 2025-10-13

Participants (start of year)

243

DOL · 2025-10-13

Plan features

code 1A1E3H

DOL · 2025-10-13

Plan type

Single-employer plan

DOL · 2025-10-13

From DOL Form 5500 filings (EFAST2) · SEC EDGAR company filings. Latest record 2025-11-06.

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