Annual Meeting of Shareholders

Apr 23, 2025 at 10:30 AM MDT

The meeting is to be held as a virtual-only webcast on Wednesday, April 23, 2025 at 10:30 a.m. (Mountain Time). You may attend the annual meeting and vote your shares electronically during the meeting via the internet at www.virtualshareholdermeeting.com/BKH2025.

To enter the annual meeting, you must enter the 16-digit control number found next to the label "Control Number" on your proxy card or voting instruction form. We recommend logging in at least 15 minutes before the meeting to ensure that you are logged in when the meeting starts.

Supporting Materials