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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 www.proxydocs.com/PHX. 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.