X0206 3 2022-04-14 0 0000010254 EARTHSTONE ENERGY INC ESTE 0001923166 Cypress Investments, LLC 34 S. WYNDEN DR., SUITE 300 HOUSTON TX 77056 1 0 1 0 0001911921 Post Oak Energy Capital, LP 34 S. WYNDEN DR., SUITE 300 HOUSTON TX 77056 1 0 1 0 0001911838 Post Oak Energy Holdings, LLC 34 S. WYNDEN DR., SUITE 300 HOUSTON TX 77056 1 0 1 0 Class A Common Stock 4611808 D Series A Convertible Preferred Stock Class A Common Stock D See Exhibit 99.3 See Exhibit 99.3 See Exhibit 99.3 Exhibit List: Exhibit 99.1 - Joint Filers' Names and Addresses Exhibit 99.2 - Joint Filers' Signatures Exhibit 99.3 - Explanation of Responses CYPRESS INVESTMENTS, LLC; By: /s/ Frost W. Cochran, Authorized Person 2022-04-22