EntityWire/South Dakota business entity search →/BLACK HILLS CORPORATION
Employer with a benefit plan
BLACK HILLS CORPORATION
BLACK HILLS CORPORATION's Employer Identification Number (EIN) is 46-0458824.
At a glance
- EIN
- 46-0458824 · 460458824
- Legal name
- BLACK HILLS CORPORATION
- Also filed as
- BLACK HILLS HOLDING CORP; BLACK HILLS CORP /SD/
- Address on file
- PO BOX 1400, RAPID CITY, SD 57709
- Records show
- SEC filer; employer with a benefit plan; state registration
- Latest record
- 2026-09-05
State registration
Texas Comptroller active franchise taxpayers file · records as of 2026-09-05
- Texas registration
- Active · Foreign profit corporation
- Source: Texas Comptroller · as of 2026-09-05
- Texas document number
- 14604588245
- Source: Texas Comptroller · as of 2026-09-05
SEC records
SEC EDGAR company filings · records as of 2026-08-17
- SEC CIK
- 0001130464
- Source: SEC · as of 2026-08-17
- Industry (SIC)
- Electric Services (4911)
- Source: SEC · as of 2026-08-17
- State of incorporation
- SD
- Source: SEC · as of 2026-08-17
- Ticker
- BKH
- Source: SEC · as of 2026-08-17
- Latest SEC filing
- 8-K 2026-08-17
- Source: SEC · as of 2026-08-17
Benefit plans
DOL Form 5500 filings (EFAST2) · records as of 2025-09-25
- Benefit plan 6, 2024 filing
- BLACK HILLS RETIREMENT PLAN
- Source: DOL 5500 · as of 2025-09-25
- Participants (start of year)
- 1,816
- Source: DOL 5500 · as of 2025-09-25
- Plan features
- Defined benefit (cash balance); Defined benefit (other); Plan sponsor is a member of an affiliated service group
- Source: DOL 5500 · as of 2025-09-25
- Plan type
- Single-employer plan
- Source: DOL 5500 · as of 2025-09-25
- Business code (NAICS)
- 221500
- Source: DOL 5500 · as of 2025-09-25
- Benefit plan 509, 2024 filing
- BLACK HILLS CORPORATION RETIREE HEALTHCARE PLAN
- Source: DOL 5500 · as of 2025-09-25
- Participants (start of year)
- 1,074
- Source: DOL 5500 · as of 2025-09-25
What this record is
Public filings that carry this EIN (DOL Form 5500 filings (EFAST2), SEC EDGAR company filings and Texas Comptroller active franchise taxpayers file), 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 South Dakota Secretary of State, Division of Business Services; see the South Dakota 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.
Other South Dakota businesses on file
- RAVEN INDUSTRIES, INC.EIN 46-0246171
- SONIFI SOLUTIONS, INC.EIN 46-0371161
- THE EVANGELICAL LUTHERAN GOOD SAMARITAN SOCIETYEIN 45-0228055
- GREAT WESTERN BANCORP, INC.EIN 42-0867112
- SOUTH DAKOTA BANKERS ASSOCIATIONEIN 46-0191650
- BLACK HILLS CHILDRENS RANCH INCEIN 46-0358693
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