Black Hills Corp. and NorthWestern Energy Shareholders Approve Merger Proposals
Rhea-AI Summary
Black Hills Corp (NYSE: BKH) and NorthWestern Energy (Nasdaq: NWE) said shareholders of both companies voted to approve the proposed all-stock merger on April 2, 2026. The transaction, announced Aug. 19, 2025, would combine the utilities into Bright Horizon Energy Corporation, serving customers across eight states.
The merger remains subject to federal (Hart-Scott-Rodino, FERC) and state (Montana, Nebraska, South Dakota) approvals and other customary closing conditions, with the companies continuing to expect closing in the second half of 2026.
AI-generated analysis. Not financial advice.
Positive
- Shareholder approvals obtained on April 2, 2026
- All-stock merger to form Bright Horizon Energy Corporation
- Combined footprint serving eight states
- Transaction expected to close in H2 2026
Negative
- Transaction remains subject to Hart-Scott-Rodino and FERC approvals
- Requires state approvals in Montana, Nebraska, and South Dakota, creating closing uncertainty
News Market Reaction – BKH
On the day this news was published, BKH gained 1.34%, reflecting a mild positive market reaction.
Data tracked by StockTitan Argus on the day of publication.
Key Figures
Market Reality Check
Peers on Argus
BKH gained 0.69% while key regulated gas peers like SR, OGS, NJR, MDU, and SWX also rose between 1.00% and 1.65%, but the momentum scanner did not flag a coordinated sector move.
Previous Acquisition Reports
| Date | Event | Sentiment | Move | Catalyst |
|---|---|---|---|---|
| May 07 | Merger approval vote | Positive | -0.7% | Stockholders approved a business combination providing over $306M gross proceeds. |
In the limited acquisition-tag history, positive shareholder-approved combination news coincided with a modest negative price reaction.
Historical acquisition-tag data shows one prior case on May 7, 2024, where AltC Acquisition Corp. stockholders approved a business combination with Oklo, generating over $306 million of gross proceeds. Despite the constructive nature of that transaction, the stock moved about -0.67% over 24 hours. Today’s BKH/NorthWestern shareholder approval is another step in a similar merger process, but BKH’s pre-news setup shows a small gain instead of a decline.
Historical Comparison
Past acquisition-tag news with stockholder approvals showed a -0.67% average move. BKH’s 0.69% gain on its merger approval represents a more constructive reaction than that history.
Both the historical and current acquisition-tag events involve shareholder approvals of business combinations, highlighting how equity markets have responded around key merger milestones.
Market Pulse Summary
This announcement confirms that both Black Hills and NorthWestern shareholders approved the proposed all-stock merger, advancing plans to form Bright Horizon Energy serving customers across eight states. Historical acquisition-tag data show mixed short-term price responses to similar approvals. Investors may focus on remaining Hart-Scott-Rodino, FERC, and state approvals, along with the targeted second-half 2026 closing, to assess execution and regulatory risk around the combination.
Key Terms
all-stock merger financial
hart-scott-rodino regulatory
ferc regulatory
joint proxy statement/prospectus regulatory
form 8-k regulatory
AI-generated analysis. Not financial advice.
RAPID CITY, S.D. and BUTTE, Mont. and SIOUX FALLS, S.D., April 02, 2026 (GLOBE NEWSWIRE) -- Black Hills Corp. (NYSE: BKH) and NorthWestern Energy Group, Inc. d/b/a NorthWestern Energy (Nasdaq: NWE) announced today that shareholders of each company voted to approve the proposed all-stock merger and other related shareholder proposals at their Special Shareholder Meetings held earlier today. The shareholder approvals represent a significant milestone toward the completion of the transaction, which was announced on Aug. 19, 2025. Upon closing of the merger, the two companies will combine to form Bright Horizon Energy Corporation, a premier regional regulated energy company serving customers across eight states.
“Shareholder approval underscores the compelling strategic rationale of this merger,” said Linn Evans, president and CEO of Black Hills Corp. “Together, we will have enhanced scale, financial strength, and growth opportunities to support safe, reliable, and affordable energy service.”
Brian Bird, president and CEO of NorthWestern Energy, added, “We appreciate the overwhelming support of our shareholders. This transaction will bring together two highly complementary utilities and positions the combined company to deliver long‑term value to customers, shareholders, and the communities we serve.”
The merger remains subject to the receipt of required federal (Hart-Scott-Rodino and FERC) and state (Montana, Nebraska, and South Dakota) regulatory approvals and the satisfaction of other customary closing conditions. The companies continue to expect the transaction to close in the second half of 2026.
Additional information regarding the transaction is available in the joint proxy statement/prospectus filed with the U.S. Securities and Exchange Commission (SEC). Detailed shareholder voting results will be disclosed in Form 8-K filings with the SEC by each company.
About Black Hills Corp.
Black Hills Corp. (NYSE: BKH) is a customer-focused, growth-oriented utility company with a tradition of improving life with energy and a vision to be the energy partner of choice. Based in Rapid City, South Dakota, the company serves 1.35 million natural gas and electric utility customers in eight states: Arkansas, Colorado, Iowa, Kansas, Montana, Nebraska, South Dakota and Wyoming. More information is available at www.blackhillscorp.com.
About NorthWestern Energy
NorthWestern Energy Group, Inc., doing business as NorthWestern Energy, provides essential energy infrastructure and valuable services that enrich lives and empower communities while serving as long-term partners to our customers and communities. We work to deliver safe, reliable, and innovative energy solutions that create value for customers, communities, employees, and investors. We do this by providing low-cost and reliable service performed by highly adaptable and skilled employees. We provide electricity and / or natural gas to approximately 850,300 customers in Montana, South Dakota, Nebraska, and Yellowstone National Park. Our operations in Montana and Yellowstone National Park are conducted through our subsidiary, NW Corp, and our operations in South Dakota and Nebraska are conducted through our subsidiary, NWE Public Service. We have provided service in South Dakota and Nebraska since 1923 and in Montana since 2002.
Forward Looking Statements
Information in this communication, other than statements of historical facts, may constitute forward-looking statements, within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These statements include, but are not limited to, statements about the benefits of the proposed transaction between Black Hills and NorthWestern Energy, including future financial and operating results (including the anticipated impact of the transaction on Black Hills’ and NorthWestern Energy’s respective earnings), statements related to the expected timing of the completion of the transaction, the plans, objectives, expectations and intentions of either company or of the combined company following the merger, anticipated future results of either company or of the combined company following the merger, the anticipated benefits and strategic and financial rationale of the merger, including estimated rate bases, investment opportunities, cash flows and capital expenditure rates and other statements that are not historical facts. Forward-looking statements may be identified by terminology such as “may,” “will,” “should,” “targets,” “scheduled,” “plans,” “intends,” “goal,” “anticipates,” “expects,” “believes,” “forecasts,” “outlook,” “estimates,” “potential,” or “continue” or negatives of such terms or other comparable terminology. The forward-looking statements are based on Black Hills and NorthWestern Energy’s current expectations, plans and estimates. Black Hills and NorthWestern Energy believe these assumptions to be reasonable, but there is no assurance that they will prove to be accurate. All forward-looking statements are subject to risks, uncertainties and other factors that may cause the actual results, performance or achievements of Black Hills or NorthWestern Energy to differ materially from any results expressed or implied by such forward-looking statements. Such factors include, among others, (1) the risk of delays in consummating the potential transaction, including as a result of required regulatory approvals, which may not be obtained on the expected timeline, or at all, (2) the risk of any event, change or other circumstance that could give rise to the termination of the merger agreement, (3) the risk that required regulatory approvals are subject to conditions not anticipated by Black Hills and NorthWestern Energy, (4) the possibility that any of the anticipated benefits and projected synergies of the potential transaction will not be realized or will not be realized within the expected time period, (5) disruption to the parties’ businesses as a result of the announcement and pendency of the transaction, including potential distraction of management from current plans and operations of Black Hills or NorthWestern Energy and the ability of Black Hills or NorthWestern Energy to retain and hire key personnel, (6) reputational risk and the reaction of each company’s customers, suppliers, employees or other business partners to the transaction, (7) the possibility that the transaction may be more expensive to complete than anticipated, including as a result of unexpected factors or events, (8) the outcome of any legal or regulatory proceedings that may be instituted against Black Hills or NorthWestern Energy related to the merger agreement or the transaction, (9) the risks associated with third party contracts containing consent and/or other provisions that may be triggered by the proposed transaction, (10) legislative, regulatory, political, market, economic and other conditions, developments and uncertainties affecting Black Hills’ or NorthWestern Energy’s businesses; (11) the evolving legal, regulatory and tax regimes under which Black Hills and NorthWestern Energy operate; (12) restrictions during the pendency of the proposed transaction that may impact Black Hills’ or NorthWestern Energy’s ability to pursue certain business opportunities or strategic transactions; and (13) unpredictability and severity of catastrophic events, including, but not limited to, extreme weather, natural disasters, acts of terrorism or outbreak of war or hostilities, as well as Black Hills’ and NorthWestern Energy’s response to any of the aforementioned factors.
Additional factors which could affect future results of Black Hills and NorthWestern Energy can be found in Black Hills’ Registration Statement on Form S-4 as well as its Annual Report on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, and NorthWestern Energy’s Annual Report on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, in each case filed with the SEC and available on the SEC’s website at http://www.sec.gov. Black Hills and NorthWestern Energy disclaim any obligation and do not intend to update or revise any forward-looking statements contained in this communication, which speak only as of the date hereof, whether as a result of new information, future events or otherwise, except as required by federal securities laws.
No Offer or Solicitation
This document is for informational purposes only and is not intended to and shall not constitute an offer to buy or sell or the solicitation of an offer to buy or sell any securities, or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made, except by means of a prospectus meeting the requirements of Section 10 of the U.S. Securities Act of 1933, as amended.
| Black Hills Corp. Contacts | NorthWestern Energy Contacts |
| Investors | Investors |
| Sal Diaz | Travis Meyer |
| 605-399-5079 | 605-978-2967 |
| investorrelations@blackhillscorp.com | travis.meyer@northwestern.com |
| Media | Media |
| 24-Hour Media Relations Line | Jo Dee Black |
| 888-242-3969 | 866-622-8081 |
| jodee.black@northwestern.com |
