BLACK HILLS CORP /SD/ reports

Company location: Rapid City, SD
Fiscal year end: 31 December

BLACK HILLS CORP /SD/ has filed 3,089 SEC EDGAR filings since 22 Dec 2000

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SEC filing history

Showing 26-50 of 1,000 matching filings.

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25

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4

PRIMARY DOCUMENT

Filing date: 18 Feb 2026
Reporting date: 01 Dec 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 13 Feb 2026
Reporting date: 12 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 13 Feb 2026
Reporting date: 12 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 13 Feb 2026
Reporting date: 12 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

10-K File 001-31303

10-K

Filing date: 11 Feb 2026
Reporting date: 31 Dec 2025
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 10 Feb 2026
Reporting date: 06 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 10 Feb 2026
Reporting date: 06 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 10 Feb 2026
Reporting date: 06 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 10 Feb 2026
Reporting date: 06 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 10 Feb 2026
Reporting date: 06 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 10 Feb 2026
Reporting date: 06 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

EFFECT File 333-293105

EFFECT filing

Filing date: 06 Feb 2026
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

5

PRIMARY DOCUMENT

Filing date: 06 Feb 2026
Reporting date: 31 Dec 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

5

PRIMARY DOCUMENT

Filing date: 06 Feb 2026
Reporting date: 31 Dec 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

5

PRIMARY DOCUMENT

Filing date: 06 Feb 2026
Reporting date: 31 Dec 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

5

PRIMARY DOCUMENT

Filing date: 06 Feb 2026
Reporting date: 31 Dec 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

5

PRIMARY DOCUMENT

Filing date: 06 Feb 2026
Reporting date: 31 Dec 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

5

PRIMARY DOCUMENT

Filing date: 06 Feb 2026
Reporting date: 31 Dec 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

5

PRIMARY DOCUMENT

Filing date: 06 Feb 2026
Reporting date: 31 Dec 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

5

PRIMARY DOCUMENT

Filing date: 06 Feb 2026
Reporting date: 31 Dec 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

5

PRIMARY DOCUMENT

Filing date: 06 Feb 2026
Reporting date: 31 Dec 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

424B3 File 333-293105

424B3

Filing date: 06 Feb 2026
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

425

425

Filing date: 06 Feb 2026
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

5

PRIMARY DOCUMENT

Filing date: 05 Feb 2026
Reporting date: 31 Dec 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

5

PRIMARY DOCUMENT

Filing date: 05 Feb 2026
Reporting date: 31 Dec 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

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