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Annual Shareholder Meeting

Oklahoma City, OK

The meeting will begin promptly at 9:00 a.m. Central Standard Time on March 2,
2021 via a live audio-only webcast. Instructions on how to participate in the Annual Meeting are
posted at Only shareholders who held shares at the close of business on the record date, January 4, 2022, may vote at the Annual Meeting, including any adjournment thereof.