X0306 4 2022-10-06 0 0000010254 EARTHSTONE ENERGY INC ESTE 0001658788 Warburg Pincus Partners II (US), L.P. C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK NY 10017 0 0 1 0 0001635320 Warburg Pincus & Co US, LLC C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK NY 10017 0 0 1 0 0001162870 WARBURG PINCUS LLC C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK NY 10017 0 0 1 0 Class A Common Stock, par value $0.001 per share 2022-10-06 4 S 0 6750000 14.58 D 12883377 I See footnotes Following the transaction reported herein, and reflecting the forfeiture to the Issuer for no consideration of 56,579 shares that were held in escrow, the shares include 1,039,611 shares held of record by, or for the benefit of, Warburg Pincus Private Equity (E&P) XI-A, L.P. ("WP E&P XI A"), 79,937 shares held of record by, or for the benefit of, Warburg Pincus XI (E&P) Partners-A, L.P. ("WP XI E&P Partners A"), 1,012,822 shares held of record by, or for the benefit of, WP IRH Holdings, L.P. ("WP IRH Holdings"), 28,086 shares held of record by, or for the benefit of, Warburg Pincus XI (E&P) Partners-B IRH, LLC ("WP XI E&P Partners B IRH"), 1,556,826 shares held of record by, or for the benefit of, WP Energy IRH Holdings, L.P. ("WPE IRH Holdings"), (cont. from footnote 1) 127,467 shares held of record by, or for the benefit of, WP Energy Partners IRH Holdings, L.P. ("WPE Partners IRH Holdings") and 49,690 shares held of record by, or for the benefit of, Warburg Pincus Energy (E&P) Partners-B IRH, LLC ("WPE E&P Partners B IRH"), 256,498 shares held of record by, or for the benefit of, Warburg Pincus Energy (E&P) Partners-A, L.P. ("WPE E&P Partners A"), 4,246,874 shares held of record by, or for the benefit of, Warburg Pincus Energy (E&P)-A, L.P. ("WPE E&P A"), 1,153,322 shares held of record by, or for the benefit of, WP Energy Chisholm Holdings, L.P. ("WPE Chisholm Holdings"), 94,429 shares held of record by, or for the benefit of, WP Energy Partners Chisholm Holdings, L.P. ("WPEP Chisholm Holdings"), 36,812 shares held of record by, or for the benefit of, Warburg Pincus Energy (E&P) Partners-B Chisholm, LLC ("WPE E&P Partners B Chisholm"), (cont. from footnote 2) 1,169,806 shares held of record by, or for the benefit of, Warburg Pincus Private Equity (E&P) XII (A), L.P. ("WP PE E&P XII"), 1,668,972shares held of record by, or for the benefit of, WP XII Chisholm Holdings, L.P. ("WP XII Chisholm Holdings"), 18,310 shares held of record by, or for the benefit of, Warburg Pincus XII (E&P) Partners-2 Chisholm, LLC ("WP XII E&P Partners 2 Chisholm"), 28,073 shares held of record by, or for the benefit of, Warburg Pincus Private Equity (E&P) XII-D (A), L.P. ("WP PE E&P XII D"), (cont. from footnote 3) 42,477 shares held of record by, or for the benefit of, Warburg Pincus Private Equity (E&P) XII-E (A), L.P. ("WP PE E&P XII E"), 76,504 shares held of record by, or for the benefit of, WP XII (E&P) Partners (A), L.P. ("WP XII E&P Partners A") and 196,861 shares held of record by, or for the benefit of, Warburg Pincus XII (E&P) Partners-1, L.P. ("WP XII E&P Partners 1") (collectively, the "Holders"). Warburg Pincus Energy (E&P) Partners-B, L.P. ("WPE E&P Partners B") is the managing member of WPE E&P Partners B Chisholm and the general partner of WPE E&P Partners B IRH. Warburg Pincus (E&P) Energy GP, L.P. ("WP E&P Energy GP") is the general partner of WPE E&P A, WPE E&P Partners A, WPE E&P Partners B, WPE IRH Holdings, WPE Partners IRH Holdings, WPE Chisholm Holdings and WPEP Chisholm Holdings. Warburg Pincus (E&P) Energy LLC ("WPE E&P Energy LLC") is the general partner of WP E&P Energy GP. Warburg Pincus XI (E&P) Partners - B, L.P. ("WP XI E&P Partners B") is the general partner of WP XI E&P Partners B IRH. Warburg Pincus (E&P) XI, L.P. ("WP XI E&P GP") is the general partner of WP E&P XI A, WP XI E&P Partners A, WP IRH Holdings, and WP XI E&P Partners B. Warburg Pincus (E&P) XI LLC ("WP XI E&P GP LLC") is the general partner of WP XI E&P GP. Warburg Pincus Partners (E&P) XI LLC ("WPP E&P XI") is the managing member of WP XI E&P GP LLC. Warburg Pincus XII (E&P) Partners-2, L.P. ("WP XII E&P Partners 2") is the managing member of WP XII E&P Partners 2 Chisholm. Warburg Pincus (E&P) XII, L.P. ("WP E&P XII") is the general partner of WP XII E&P Partners 2, WP PE E&P XII, WP XII Chisholm Holdings, WP PE E&P XII D, WP PE E&P XII E, WP XII E&P Partners A and WP XII E&P Partners 1. Warburg Pincus (E&P) XII LLC ("WP E&P XII LLC") is the general partner of WP E&P XII. Warburg Pincus Partners II (US), L.P. ("WPP II US") is the managing member of WPP E&P XI, WP E&P XII LLC and WPE E&P Energy LLC. Warburg Pincus & Company US, LLC ("WP & Co. US LLC") is the general partner of WPP II US. Warburg Pincus LLC ("WP LLC") is a registered investment adviser, and the manager of WP PE E&P XII, WP PE E&P XII D, WP PE E&P XII E, WP XII E&P Partners 1, WP XII E&P Partners A, WP E&P XI A, WP XI E&P Partners A, WP XI E&P Partners B, WPE E&P Partners A, WPE E&P Partners B and WPE E&P A. Each Holder and each of WPE E&P Partners B, WP E&P Energy GP, WPE E&P Energy LLC, WP XI E&P Partners B, WP XI E&P GP, WP XI E&P GP LLC, WPP E&P XI, WP XII E&P Partners 2, WP E&P XII, WP E&P XII LLC, WPP II US, WP & Co. US LLC and WP LLC (collectively, the "Parent Entities" and, together with the Holders, the "Reporting Entities") directly (whether through ownership or position) or indirectly through one or more intermediaries, may be deemed for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, to be the indirect beneficial owner of some or all of the shares owned by the Holders and, therefore, a "ten percent holder" hereunder. Each Holder and each Parent Entity disclaims beneficial ownership of the securities reported herein, except to the extent of its pecuniary interest therein, and, with respect to each of the Holders, except to the extent of its respective direct ownership reported herein, and this report shall not be deemed an admission that the Reporting Persons are the beneficial owners of such securities for purposes of Section 16 or for any other purposes. Due to the limitations of the electronic filing system, certain Reporting Entities are filing a separate Form 4. Warburg Pincus Partners II (US), L.P., By: Warburg Pincus & Company US, LLC, By: /s/ Robert B. Knauss, Authorized Signatory 2022-10-11 Warburg Pincus & Company US, LLC, By: /s/ Robert B. Knauss, Authorized Signatory 2022-10-11 Warburg Pincus LLC, By: /s/ Robert B. Knauss, Authorized Signatory 2022-10-11