Black Hills Corporation (BKH) is trading higher as merger momentum improves following a key milestone: shareholders at both Black Hills and NorthWestern Energy approved the transaction-related proposals at special meetings held April 2, 2026. With the shareholder vote no longer an overhang, investors are rotating attention to the remaining regulatory calendar and the probability-weighted timing of closing.

The merger is structured as an all-stock combination intended to create a larger regional regulated utility platform. Shareholder approval removes a binary risk that could have delayed or derailed the deal, and it typically allows management teams to shift from solicitation to execution—pushing forward regulatory filings, integration planning, and financing/credit-rating discussions tied to the pro forma capital structure.

The deal still hinges on multiple regulatory approvals and customary conditions. Filings indicate required approvals include the Federal Energy Regulatory Commission and state utility regulators, including Montana and Nebraska, among others, plus satisfaction of antitrust waiting-period requirements. Investors are also tracking procedural schedules and hearings already underway in at least some jurisdictions, as timing and any imposed conditions can influence the expected close, currently framed for the second half of 2026.