Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0001193125-26-046028
Filing Date
2026-02-11
Accepted
2026-02-11 12:58:57
Documents
136
Period of Report
2025-12-31

Document Format Files

Seq Description Document Type Size
1 10-K bkh-20251231.htm   iXBRL 10-K 7763121
2 EX-10.10 bkh-ex10_10.htm EX-10.10 223771
3 EX-10.11 bkh-ex10_11.htm EX-10.11 229798
4 EX-10.26 bkh-ex10_26.htm EX-10.26 123126
5 EX-21 bkh-ex21.htm EX-21 52971
6 EX-23.1 bkh-ex23_1.htm EX-23.1 3937
7 EX-31.1 bkh-ex31_1.htm EX-31.1 34678
8 EX-31.2 bkh-ex31_2.htm EX-31.2 34663
9 EX-32.1 bkh-ex32_1.htm EX-32.1 16545
10 EX-32.2 bkh-ex32_2.htm EX-32.2 16617
11 EX-95 bkh-ex95.htm EX-95 31168
12 GRAPHIC img212244609_0.gif GRAPHIC 61496
  Complete submission text file 0001193125-26-046028.txt   31346883

Data Files

Seq Description Document Type Size
13 XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT bkh-20251231.xsd EX-101.SCH 2897549
139 EXTRACTED XBRL INSTANCE DOCUMENT bkh-20251231_htm.xml XML 7656496
Mailing Address 7001 MT RUSHMORE RD PO BOX 1400 RAPID SD 57709
Business Address 7001 MT RUSHMORE RD PO BOX 1400 RAPID CITY SD 57709 6057212343
BLACK HILLS CORP /SD/ (Filer) CIK: 0001130464 (see all company filings)

EIN.: 460458824 | State of Incorp.: SD | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-31303 | Film No.: 26619622
SIC: 4911 Electric Services
(CF Office: 01 Energy & Transportation)