BLACK HILLS CORP /SD/ — S-4 Filings

3 S-4 filings on record

This page lists all S-4 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 3 S-4 documents with the SEC since 2016. To view all SEC filings by BLACK HILLS CORP /SD/, see the full filings list.

Overview All Filings Financials Insiders

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
S-4	S-4	0001104659-26-008725	Jan 30, 2026	—
S-4	FORM S-4	0000930661-02-004161	Nov 29, 2002	—
S-4	FORM S-4 REGISTRATION STATEMENT	0000012400-00-000026	Dec 22, 2000	—