EntityWire

EntityWire / EIN 46-0458824

Employer with a benefit plan

BLACK HILLS CORPORATION

EIN 46-0458824. 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 2026-08-17.

Employer with a benefit plan ยท SEC filer

BLACK HILLS CORPORATION

Also filed as BLACK HILLS HOLDING CORP; BLACK HILLS CORP /SD/

PO BOX 1400, RAPID CITY, SD 57709

EIN

46-0458824

SEC CIK

0001130464

SEC · 2026-08-17

Industry (SIC)

Electric Services (4911)

SEC · 2026-08-17

State of incorporation

SD

SEC · 2026-08-17

Ticker

BKH

SEC · 2026-08-17

Latest SEC filing

8-K 2026-08-17

SEC · 2026-08-17

Benefit plan 6, 2024 filing

BLACK HILLS RETIREMENT PLAN

DOL · 2025-09-25

Participants (start of year)

1,816

DOL · 2025-09-25

Plan features

code 1A1C3H

DOL · 2025-09-25

Plan type

Single-employer plan

DOL · 2025-09-25

Business code (NAICS)

221500

DOL · 2025-09-25

Benefit plan 509, 2024 filing

BLACK HILLS CORPORATION RETIREE HEALTHCARE PLAN

DOL · 2025-09-25

Participants (start of year)

1,074

DOL · 2025-09-25

Plan features

code 4A4B4D4E

DOL · 2025-09-25

Plan type

Single-employer plan

DOL · 2025-09-25

From DOL Form 5500 filings (EFAST2) · SEC EDGAR company filings. Latest record 2026-08-17.

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