BLACK HILLS CORP /SD/ — 424B2 Filings
13 424B2 filings on record
This page lists all 424B2 filings submitted to the SEC by BLACK HILLS CORP /SD/ (BKH), sorted by most recent first. Each row links to the full filing on EdgarLookup. BLACK HILLS CORP /SD/ has filed 13 424B2 documents with the SEC since 2016. To view all SEC filings by BLACK HILLS CORP /SD/, see the full filings list.
All
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 |
|---|---|---|---|---|
| 424B2 | 424B2 | 0001104659-25-093868 | Sep 26, 2025 | — |
| 424B2 | 424B2 | 0001104659-24-061208 | May 14, 2024 | — |
| 424B2 | 424B2 | 0001104659-23-098919 | Sep 7, 2023 | — |
| 424B2 | 424B2 | 0001104659-23-028354 | Mar 3, 2023 | — |
| 424B2 | 424B2 | 0001104659-21-108961 | Aug 24, 2021 | — |
| 424B2 | 424B2 | 0001047469-20-003611 | Jun 16, 2020 | — |
| 424B2 | FINAL PROSPECTUS SUPPLEMENT DATED SEPTEMBER 26, 2019 | 0001047469-19-005522 | Sep 30, 2019 | — |
| 424B2 | FINAL PROSPECTUS SUPPLEMENT DATED AUGUST 10, 2016 (SENIOR UNSECURED NOTES) | 0001047469-16-014935 | Aug 11, 2016 | — |
| 424B2 | FINAL PROSPECTUS SUPPLEMENT - 2.500% NOTES DUE 2019 AND 3.950% SENIOR NOTES DUE | 0001047469-16-009626 | Jan 11, 2016 | — |
| 424B2 | 424B2 | 0001047469-13-010591 | Nov 15, 2013 | — |
| 424B2 | 424B2 | 0001047469-10-009611 | Nov 12, 2010 | — |
| 424B2 | 424B2 | 0001047469-10-006414 | Jul 14, 2010 | — |
| 424B2 | 424B2 | 0001047469-09-005464 | May 12, 2009 | — |