BLACK HILLS CORP /SD/ — Form 8-K
Filed August 17, 2026 · analyzed by the 8-K Agent
8-K
— Neutral
significance 72/100
What the filing says
Black Hills Corporation is acquiring NorthWestern Energy Group in an all-stock transaction with exchange ratio of 0.98 Black Hills shares per NorthWestern share, representing ~$4.4 billion consideration. Merger was signed August 18, 2025; shareholder and most regulatory approvals obtained by June 2026; Montana PSC approval pending. Pro forma combined 2026 H1 revenues $2,124M; combined company will serve ~850K customers across MT, SD, NE.
Why this rating
Material M&A—combined entity ~$21.2B assets, ~52% larger than Black Hills alone. Pending regulatory closure adds execution risk; neutral impact reflects standard acquisition complexity.
See more from August 17, 2026.
EDGAR·FLOW summarizes public SEC EDGAR filings with automated analysis. Materiality scores and stock-impact predictions are algorithmically generated and are not investment advice. Always verify against the source filing on SEC.gov.