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BLACK HILLS CORP SD

For the period ended Dec 31, 2024. Filed Feb 12, 2025.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2024 · Filed Feb 12, 2025

BKH$84.87+0.3%Stored close · as of Nov 6, 2026

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Contents

Recent Developments

See Note 2 of the Notes to Consolidated Financial Statements in this Annual Report on Form 10-K for recent rate review activity for Colorado Electric.

See Key Elements of our Business Strategy section above for discussion of recent developments related to our partnership with Meta, construction progress on our Ready Wyoming project, Colorado Electric's Clean Energy Plan, South Dakota Electric's IRP and the addition of 99 MWs of new generation, and publishing of our first formal WMP and plans to formalize our PSPS.

In 2024, Wygen I and Pueblo Airport Generation #4-5 experienced unplanned generation outages that had a $8.3 million negative impact to Operating income. We are currently assessing insurance recovery opportunities.

On January 20, 2025, Wyoming Electric set a new all-time and winter peak load of 318 MWs, surpassing the previous all-time and winter peak load of 314 MWs set on January 11, 2024. Prior to 2024, the previous winter peak was 301 megawatts in December 2023 and the all-time peak was 312 megawatts in July 2023.

See Note 2 of the Notes to Consolidated Financial Statements in this Annual Report on Form 10-K for recent rate review activity for Arkansas Gas, Colorado Gas, Iowa Gas, Kansas Gas and Wyoming Gas.

See Key Elements of our Business Strategy section above for discussion of recent developments related to BHERR's purchase of a RNG production facility in Iowa.

Corporate and Other

See Note 8 of the Notes to Consolidated Financial Statements in this Annual Report on Form 10-K for information regarding our recent ATM program activity and our May 16, 2024, debt offering.

On May 31, 2024, we amended and restated our corporate Revolving Credit Facility. See Note 8 of the Notes to Consolidated Financial Statements in this Annual Report on Form 10-K for additional information.

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