Form 4 - Statement of changes in beneficial ownership of securities:
SEC Accession No. 0001130464-26-000061
Filing Date
2026-05-04
Accepted
2026-05-04 16:24:21
Documents
2
Period of Report
2026-05-01

Document Format Files

Seq Description Document Type Size
1 PRIMARY DOCUMENT primary_01.html 4  
1 PRIMARY DOCUMENT primary_01.xml 4 4763
2 EX-24 DOCUMENT ottopoa2024.txt EX-24 1332
  Complete submission text file 0001130464-26-000061.txt   7613
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/ (Issuer) CIK: 0001130464 (see all company filings)

EIN.: 460458824 | State of Incorp.: SD | Fiscal Year End: 1231
SIC: 4911 Electric Services
(CF Office: 01 Energy & Transportation)

Mailing Address PO BOX 1400 RAPID CITY SD 57709
Business Address
Otto Robert P (Reporting) CIK: 0001693863 (see all company filings)

Type: 4 | Act: 34 | File No.: 001-31303 | Film No.: 26938036