BLACK HILLS CORP /SD/ — 424B5 Filings
29 424B5 filings on record
This page lists all 424B5 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 29 424B5 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 |
|---|---|---|---|---|
| 424B5 | 424B5 | 0001104659-25-093158 | Sep 25, 2025 | — |
| 424B5 | 424B5 | 0001104659-25-046199 | May 8, 2025 | — |
| 424B5 | 424B5 | 0001104659-24-060257 | May 13, 2024 | — |
| 424B5 | 424B5 | 0001104659-23-098512 | Sep 6, 2023 | — |
| 424B5 | 424B5 | 0001104659-23-072348 | Jun 16, 2023 | — |
| 424B5 | 424B5 | 0001104659-23-027702 | Mar 2, 2023 | — |
| 424B5 | 424B5 | 0001104659-21-108384 | Aug 23, 2021 | — |
| 424B5 | 424B5 | 0001104659-20-089895 | Aug 4, 2020 | — |
| 424B5 | 424B5 | 0001047469-20-003560 | Jun 12, 2020 | — |
| 424B5 | 424B5 | 0001104659-20-024421 | Feb 25, 2020 | — |
| 424B5 | 424B5 | 0001047469-19-005459 | Sep 26, 2019 | — |
| 424B5 | FINAL PROSPECTUS SUPPLEMENT-4.350% NOTES DUE 2033 | 0001047469-18-005644 | Aug 16, 2018 | — |
| 424B5 | PRELIMINARY PROSPECTUS SUPPLEMENT-SENIOR NOTES | 0001047469-18-005585 | Aug 13, 2018 | — |
| 424B5 | PROSPECTUS SUPPLEMENT DATED AUGUST 4, 2017 (ATM EQUITY OFFERING PROGRAM) | 0001047469-17-005023 | Aug 4, 2017 | — |
| 424B5 | PRELIMINARY PROSPECTUS SUPPLEMENT DATED AUGUST 10, 2016 (SENIOR UNSECURED NOTES) | 0001047469-16-014873 | Aug 10, 2016 | — |
| 424B5 | PROSPECTUS SUPPLEMENT-ATM EQUITY PROGRAM | 0001047469-16-011344 | Mar 18, 2016 | — |
| 424B5 | PRELIMINARY PROSPECTUS SUPPLEMENT-SENIOR NOTES | 0001047469-16-009598 | Jan 8, 2016 | — |
| 424B5 | EQUITY UNITS FINAL PROSPECTUS SUPPLEMENT | 0001047469-15-008816 | Nov 19, 2015 | — |
| 424B5 | COMMON STOCK FINAL PROSPECTUS SUPPLEMENT | 0001047469-15-008815 | Nov 19, 2015 | — |
| 424B5 | 424B5 | 0001047469-15-008689 | Nov 16, 2015 | — |
| 424B5 | 424B5 | 0001047469-15-008687 | Nov 16, 2015 | — |
| 424B5 | 424B5 | 0001047469-13-010526 | Nov 14, 2013 | — |
| 424B5 | 424B5 | 0001047469-10-009499 | Nov 9, 2010 | — |
| 424B5 | 424B5 | 0001047469-10-006379 | Jul 13, 2010 | — |
| 424B5 | 424B5 | 0001047469-09-005332 | May 11, 2009 | — |
| 424B5 | 424B5 PROSPECTUS | 0001193125-03-006075 | May 20, 2003 | — |
| 424B5 | PROSPECTUS SUPPLEMENT | 0001193125-03-004756 | May 13, 2003 | — |
| 424B5 | 424B5 PROSPECTUS | 0001193125-03-002066 | Apr 25, 2003 | — |
| 424B5 | PRELIMINARY PROSPECTUS SUPPLEMENT | 0000930661-03-001835 | Apr 21, 2003 | — |