X0306 4 2022-07-06 0 0000010254 EARTHSTONE ENERGY INC ESTE 0001923166 Cypress Investments, LLC 34 S. WYNDEN DR., SUITE 300 HOUSTON TX 77056 1 0 0 0 0001911921 Post Oak Energy Capital, LP 34 S. WYNDEN DR., SUITE 300 HOUSTON TX 77056 1 0 0 0 0001911838 Post Oak Energy Holdings, LLC 34 S. WYNDEN DR., SUITE 300 HOUSTON TX 77056 1 0 0 0 Class A Common Stock 2022-07-06 4 M 0 5405405 A 10017213 D Series A Convertible Preferred Stock 2022-07-06 4 M 0 60000 D Class A Common Stock 5405405 0 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 2022-07-08