BLACK HILLS CORP /SD/ — All Filings
1,003 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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10-K
10-K/A
10-K405
10-K405/A
10-Q
10-Q/A
11-K
144
25-NSE
3
305B2
35-CERT
4
4/A
424B2
424B3
424B4
424B5
424B7
425
5
8-A12B
8-K
8-K/A
ARS
CERTNYS
CORRESP
DEF 14A
DEFA14A
DEFR14A
DRS
EFFECT
FWP
POSASR
PRE 14A
RW
S-1
S-1/A
S-3
S-3/A
S-3ASR
S-4
S-4/A
S-8
S-8 POS
SC 13G
SC 13G/A
SCHEDULE 13G/A
SE
U-1
U-1/A
U-3A-2
U-6B-2
U-9C-3
U5A
U5A/A
U5B
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SCHEDULE 13G/A | — | 0000102909-26-000763 | Mar 26, 2026 | — |
| ARS | ARS | 0001193125-26-113969 | Mar 18, 2026 | Dec 31, 2025 |
| DEF 14A | DEF 14A | 0001193125-26-113958 | Mar 18, 2026 | Apr 29, 2026 |
| 8-K | 8-K | 0001193125-26-059379 | Feb 19, 2026 | — |
| 4 | PRIMARY DOCUMENT | 0001130464-26-000046 | Feb 18, 2026 | Dec 1, 2025 |
| 4 | PRIMARY DOCUMENT | 0001130464-26-000043 | Feb 13, 2026 | Feb 12, 2026 |
| 4 | PRIMARY DOCUMENT | 0001130464-26-000042 | Feb 13, 2026 | Feb 12, 2026 |
| 4 | PRIMARY DOCUMENT | 0001130464-26-000041 | Feb 13, 2026 | Feb 12, 2026 |
| 10-K | 10-K | 0001193125-26-046028 | Feb 11, 2026 | Dec 31, 2025 |
| 4 | PRIMARY DOCUMENT | 0001130464-26-000037 | Feb 10, 2026 | Feb 6, 2026 |
| 4 | PRIMARY DOCUMENT | 0001130464-26-000035 | Feb 10, 2026 | Feb 6, 2026 |
| 4 | PRIMARY DOCUMENT | 0001130464-26-000034 | Feb 10, 2026 | Feb 6, 2026 |
| 4 | PRIMARY DOCUMENT | 0001130464-26-000033 | Feb 10, 2026 | Feb 6, 2026 |
| 4 | PRIMARY DOCUMENT | 0001130464-26-000029 | Feb 10, 2026 | Feb 6, 2026 |
| 4 | PRIMARY DOCUMENT | 0001130464-26-000028 | Feb 10, 2026 | Feb 6, 2026 |
| EFFECT | — | 9999999995-26-000474 | Feb 6, 2026 | — |
| 5 | PRIMARY DOCUMENT | 0001130464-26-000024 | Feb 6, 2026 | Dec 31, 2024 |
| 5 | PRIMARY DOCUMENT | 0001130464-26-000023 | Feb 6, 2026 | Dec 31, 2024 |
| 5 | PRIMARY DOCUMENT | 0001130464-26-000022 | Feb 6, 2026 | Dec 31, 2024 |
| 5 | PRIMARY DOCUMENT | 0001130464-26-000021 | Feb 6, 2026 | Dec 31, 2024 |
| 5 | PRIMARY DOCUMENT | 0001130464-26-000020 | Feb 6, 2026 | Dec 31, 2024 |
| 5 | PRIMARY DOCUMENT | 0001130464-26-000019 | Feb 6, 2026 | Dec 31, 2024 |
| 5 | PRIMARY DOCUMENT | 0001130464-26-000018 | Feb 6, 2026 | Dec 31, 2024 |
| 5 | PRIMARY DOCUMENT | 0001130464-26-000017 | Feb 6, 2026 | Dec 31, 2024 |
| 5 | PRIMARY DOCUMENT | 0001130464-26-000016 | Feb 6, 2026 | Dec 31, 2024 |
| 424B3 | 424B3 | 0001104659-26-011554 | Feb 6, 2026 | — |
| 425 | 425 | 0001193125-26-041172 | Feb 6, 2026 | — |
| 5 | PRIMARY DOCUMENT | 0001130464-26-000005 | Feb 5, 2026 | Dec 31, 2024 |
| 5 | PRIMARY DOCUMENT | 0001130464-26-000004 | Feb 5, 2026 | Dec 31, 2024 |
| 8-K | 8-K | 0001193125-26-037663 | Feb 4, 2026 | — |
| S-4 | S-4 | 0001104659-26-008725 | Jan 30, 2026 | — |
| 425 | 425 | 0001104659-26-008728 | Jan 30, 2026 | — |
| 4 | PRIMARY DOCUMENT | 0001130464-25-000015 | Nov 12, 2025 | Nov 10, 2025 |
| 4 | PRIMARY DOCUMENT | 0001130464-25-000013 | Nov 10, 2025 | Nov 7, 2025 |
| 425 | 425 | 0001104659-25-108599 | Nov 10, 2025 | — |
| 10-Q | 10-Q | 0001193125-25-268567 | Nov 6, 2025 | Sep 30, 2025 |
| 8-K | 8-K | 0001193125-25-267138 | Nov 5, 2025 | — |
| DRS | — | 0001104659-25-103962 | Oct 30, 2025 | — |
| 3 | PRIMARY DOCUMENT | 0001130464-25-000011 | Oct 17, 2025 | Oct 13, 2025 |
| 8-K | FORM 8-K | 0001104659-25-096060 | Oct 2, 2025 | — |
| 8-K | FORM 8-K | 0001104659-25-094481 | Sep 29, 2025 | Sep 25, 2025 |
| 424B2 | 424B2 | 0001104659-25-093868 | Sep 26, 2025 | — |
| FWP | FWP | 0001104659-25-093349 | Sep 25, 2025 | — |
| 424B5 | 424B5 | 0001104659-25-093158 | Sep 25, 2025 | — |
| 8-K | 8-K | 0001193125-25-203783 | Sep 15, 2025 | — |
| 4 | PRIMARY DOCUMENT | 0001593968-25-000975 | Aug 21, 2025 | Aug 1, 2025 |
| 3 | PRIMARY DOCUMENT | 0001593968-25-000965 | Aug 20, 2025 | Jul 21, 2025 |
| 425 | 425 | 0001104659-25-080278 | Aug 19, 2025 | — |
| 8-K | FORM 8-K | 0001104659-25-080276 | Aug 19, 2025 | Aug 18, 2025 |
| 8-K | FORM 8-K | 0001104659-25-080000 | Aug 19, 2025 | — |