EntityWire/Montana business entity search →/NORTHWESTERN CORPORATION
Employer with a benefit plan
NORTHWESTERN CORPORATION
NORTHWESTERN CORPORATION's Employer Identification Number (EIN) is 46-0172280.
At a glance
- EIN
- 46-0172280 · 460172280
- Legal name
- NORTHWESTERN CORPORATION
- Also filed as
- NORTHWESTERN PUBLIC SERVICE CO
- Address on file
- 11 EAST PARK STREET, BUTTE, MT 597011711
- Records show
- SEC filer; employer with a benefit plan
- Latest record
- 2025-11-17
Benefit plans
DOL Form 5500 filings (EFAST2) · records as of 2025-11-17
- Benefit plan 504, 2024 filing
- NORTHWESTERN CORPORATION FAMILY PROTECTOR BENEFIT PLAN
- Source: DOL 5500 · as of 2025-11-17
- Participants (start of year)
- 5
- Source: DOL 5500 · as of 2025-11-17
- Plan features
- Death benefits (other than life insurance)
- Source: DOL 5500 · as of 2025-11-17
- Plan type
- Single-employer plan
- Source: DOL 5500 · as of 2025-11-17
- Business code (NAICS)
- 221100
- Source: DOL 5500 · as of 2025-11-17
- Benefit plan 530, 2024 filing
- NORTHWESTERN ENERGY EMPLOYEE BENEFIT PLAN
- Source: DOL 5500 · as of 2025-10-13
- Participants (start of year)
- 2,202
- Source: DOL 5500 · as of 2025-10-13
- Plan features
- Health (other than dental or vision); Life insurance; Dental; Other; Long-term disability; Vision
- Source: DOL 5500 · as of 2025-10-13
- Plan type
- Single-employer plan
- Source: DOL 5500 · as of 2025-10-13
- Business code (NAICS)
- 221100
- Source: DOL 5500 · as of 2025-10-13
- Benefit plan 101, 2024 filing
- NORTHWESTERN ENERGY MT PENSION PLAN
- Source: DOL 5500 · as of 2025-09-30
- Participants (start of year)
- 1,037
- Source: DOL 5500 · as of 2025-09-30
- Plan features
- Defined benefit (cash balance); Defined benefit (other); Defined benefit (code section 412(e)(3)); Plan sponsor is a member of an affiliated service group
- Source: DOL 5500 · as of 2025-09-30
- Plan type
- Single-employer plan
- Source: DOL 5500 · as of 2025-09-30
What this record is
Public filings that carry this EIN (DOL Form 5500 filings (EFAST2) and SEC EDGAR company filings), shown as filed. Nothing is scraped from the IRS, and a public-record match is not IRS TIN validation.
What it is not
Registry status, formation date, and registered agent come from the Montana Secretary of State, Business Services Division; see the Montana business entity search.
If something is wrong
A name, address, or classification here is what the source published. To correct the source, file with it; to have this page removed, see corrections and removal.
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