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918.524.8100
Address
6120 S. Yale Avenue, Suite 1500 Tulsa, OK 74136

Investor Relations

Alisa Perkins

(918) 524-8081

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Computershare

P.O. Box 505000

Louisville, KY 40233-5000

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Computershare

462 South 4th Street, Suite 1600

Louisville, KY 40202