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