SCHEDULE 13D/A 0001493152-25-024742 0001750547 XXXXXXXX LIVE 9 Ordinary Shares, no par value 11/13/2025 false 0001698514 G6375R107 National Energy Services Reunited Corp.

777 POST OAK BLVD. 7TH FLOOR HOUSTON TX 77056

Mubbadrah Investment LLC 968 24390901 Building No. 1/21 Way No. 5001 Near Al Nadha Towers, Ghala, Muscat P4 XX 0001750547 N Mubbadrah Investment LLC b OO N P4 0.00 4278532.00 0.00 4278532.00 4278532.00 N 4.25 OO (2) This Schedule 13D is filed by Mubbadrah Investment LLC ("Mubbadrah"), Wild Investment LLC, formerly Wild Holding LLC ("Wild Investment"), Myrad Investment LLC, formerly Myrad Holding LLC ("Myrad Investment"), Yasser Al Barami ("Mr. Al Barami") and Hilal Al Busaidi ("Mr. Al Busaidi" and, together with Mubbadrah, Wild Investment, Myrad Investment, and Mr. Al Barami, the "Reporting Persons"). The Reporting Persons each expressly disclaim status as a group for purposes of this Schedule 13D. (8, 10 and 11) Consists of 4,278,532.00 ordinary shares, no par value ("Ordinary Shares"), of National Energy Services Reunited Corp. (the "Issuer") held by Mubbadrah. Wild Investment and Myrad Investment each own 50% of Mubbadrah. Mr. Al Barami owns 90% of Wild Investment and Mr. Al Busaidi owns 97.5% of Myrad Investment. By virtue of these relationships, Wild Investment, Myrad Investment, Mr. Al Barami and Al Busaidi may be deemed to share voting and dispositive control over the Ordinary Shares held by Mubbadrah. Each of Wild Investment, Myrad Investment, Mr. Al Barami and Mr. Al Busaidi disclaim beneficial ownership of any Ordinary Shares held or beneficially owned by Mubbadrah, except to the extent of each of their pecuniary interests therein. (13) The percentage is calculated based upon a total of 100,777,759 Ordinary Shares, no par value, of National Energy Services Reunited Corp., outstanding as of September 30, 2025, as reported by the Issuer in its Form 6-K filed with the Securities and Exchange Commission on November 13, 2025, the last public disclosure by the Issuer of the outstanding Ordinary Shares of the Issuer. (13) This Amendment constitutes an exit filing for the Reporting Person. (13) This Amendment constitutes an exit filing for the Reporting Person. 0002062867 N Wild Investment LLC b OO N P4 0.00 4278532.00 0.00 4278532.00 4278532.00 N 4.25 OO (8, 10 and 11) Consists of 4,278,532.00 Ordinary Shares held by Mubbadrah. Wild Investment owns 50% of Mubbadrah. By virtue of this relationship, Wild Investment may be deemed to share voting and dispositive control over the Ordinary Shares held by Mubbadrah. Wild Investment disclaims beneficial ownership of any Ordinary Shares held or beneficially owned by Mubbadrah, except to the extent of its pecuniary interests therein. (13) The percentage is calculated based upon a total of 100,777,759 Ordinary Shares, no par value, of National Energy Services Reunited Corp., outstanding as of September 30, 2025, as reported by the Issuer in its Form 6-K filed with the Securities and Exchange Commission on November 13, 2025, the last public disclosure by the Issuer of the outstanding Ordinary Shares of the Issuer. (13) This Amendment constitutes an exit filing for the Reporting Person. 0002062755 N Myrad Investment LLC b OO N P4 0.00 4278532.00 0.00 4278532.00 4278532.00 N 4.25 OO (8, 10 and 11) Consists of 4,278,532.00 Ordinary Shares held by Mubbadrah. Myrad Investment owns 50% of Mubbadrah. By virtue of this relationship, Myrad Investment may be deemed to share voting and dispositive control over the Ordinary Shares held by Mubbadrah. Myrad Investment disclaims beneficial ownership of any Ordinary Shares held or beneficially owned by Mubbadrah, except to the extent of its pecuniary interests therein. (13) The percentage is calculated based upon a total of 100,777,759 Ordinary Shares, no par value, of National Energy Services Reunited Corp., outstanding as of September 30, 2025, as reported by the Issuer in its Form 6-K filed with the Securities and Exchange Commission on November 13, 2025, the last public disclosure by the Issuer of the outstanding Ordinary Shares of the Issuer. (13) This Amendment constitutes an exit filing for the Reporting Person. 0002062790 N Yasser Al Barami b OO N P4 0.00 4278532.00 0.00 4278532.00 4278532.00 N 4.25 IN (8,10,11) Consists of 4,278,532.00 Ordinary Shares held by Mubbadrah. Mr. Al Barami owns 90% of Wild Investment, which owns 50% of Mubbadrah. By virtue of this relationship, Mr. Al Barami may be deemed to share voting and dispositive control over the Ordinary Shares held by Mubbadrah. Mr. Al Barami disclaims beneficial ownership of any Ordinary Shares held or beneficially owned by Mubbadrah, except to the extent of his pecuniary interests therein. (13) The percentage is calculated based upon a total of 100,777,759 Ordinary Shares, no par value, of National Energy Services Reunited Corp., outstanding as of September 30, 2025, as reported by the Issuer in its Form 6-K filed with the Securities and Exchange Commission on November 13, 2025, the last public disclosure by the Issuer of the outstanding Ordinary Shares of the Issuer. (13) This Amendment constitutes an exit filing for the Reporting Person. 0002062994 N Hilal Al Busaidi b OO N P4 0.00 4278532.00 0.00 4278532.00 4278532.00 N 4.25 IN (8, 10 and 11) Consists of 4,278,532.00 Ordinary Shares held by Mubbadrah. Mr. Al Busaidi owns 97.5% of Wild Investment, which owns 50% of Mubbadrah. By virtue of this relationship, Mr. Al Busaidi may be deemed to share voting and dispositive control over the Ordinary Shares held by Mubbadrah. Mr. Al Busaidi disclaims beneficial ownership of any Ordinary Shares held or beneficially owned by Mubbadrah, except to the extent of his pecuniary interests therein. (13) The percentage is calculated based upon a total of 100,777,759 Ordinary Shares, no par value, of National Energy Services Reunited Corp., outstanding as of September 30, 2025, as reported by the Issuer in its Form 6-K filed with the Securities and Exchange Commission on November 13, 2025, the last public disclosure by the Issuer of the outstanding Ordinary Shares of the Issuer. (13) This Amendment constitutes an exit filing for the Reporting Person. Ordinary Shares, no par value National Energy Services Reunited Corp. 777 POST OAK BLVD. 7TH FLOOR HOUSTON TX 77056 EXPLANATORY NOTE This Amendment No. 9 (the "Amendment") amends and supplements the Schedule 13D filed with the Securities and Exchange Commission (the "Commission") on September 27, 2018, by Mubbadrah Investment LLC, an Oman limited liability company ("Mubbadrah"), Wild Investment LLC, an Oman limited liability company, formerly Wild Holding LLC ("Wild Investment"), Myrad Investment LLC, an Oman limited liability company, formerly Myrad Holding LLC ("Myrad Investment"), Yasser Al Barami ("Mr. Al Barami"), and Hilal Al Busaidi ("Mr. Al Busaidi" and, together with Mubbadrah, Wild Investment, Myrad Investment, and Mr. Al Barami, the "Reporting Persons"), as amended by the Amendment No. 1 thereto filed with the Commission on October 8, 2019, the Amendment No. 2 thereto filed with the Commission on June 24, 2020, the Amendment No. 3 thereto filed with the Commission on October 21, 2020, the Amendment No. 4 thereto filed with the Commission on November 22, 2021, the Amendment No. 5 thereto filed with the Commission on June 23, 2022, the Amendment No. 6 thereto filed with the Commission on August 12, 2024, the Amendment No. 7 thereto filed with the Commission on March 24, 2025 and the Amendment No. 8 thereto filed with the Commission on November 24, 2025 (such Schedule 13D as amended to date, the "Schedule 13D"). Capitalized terms used but not otherwise defined in this Amendment have the meanings ascribed to such terms in the Schedule 13D. Except as expressly amended and supplemented by this Amendment, the Schedule 13D is not amended or supplemented in any respect, and the disclosures set forth in the Schedule 13D, other than as amended herein are incorporated by reference herein. As a result of the open market sales described below, the Reporting Persons ceased to be beneficial owners of more than 5% of the Issuer's Ordinary Shares. Therefore, the filing of this Amendment constitutes an exit filing for the Reporting Persons. Item 3 is hereby amended and modified to include the following (which shall be in addition to the information previously included in the Schedule 13D): This Amendment reports: (a) the sale by Mubbadrah in open market transactions from November 5, 2025 through January 22, 2026, of 867,478 Ordinary shares of the Issuer as described on Schedule A; and (b) the date on which the Reporting Persons ceased to be the beneficial owner of more than five percent of the Ordinary Shares of the Issuer. The information set forth on rows 11 and 13 of the cover pages of this Schedule 13D/A is incorporated by reference. The percentage set forth in row 13 is based upon a total of 100,777,759 Ordinary Shares, no par value, of National Energy Services Reunited Corp., outstanding as of September 30, 2025, as reported by the Issuer in its Form 6-K filed with the Securities and Exchange Commission on November 13, 2025, the last public disclosure by the Issuer of the outstanding Ordinary Shares of the Issuer. The information set forth in rows 7 through 10 of the cover pages to this Schedule 13D/A is incorporated by reference. This Amendment reports: (a) the sale by Mubbadrah in open market transactions from November 5, 2025 through January 22, 2026, of 867,478 ordinary shares of the Issuer as described on Schedule A. No person (other than the Reporting Persons) is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Ordinary Shares subject to this Schedule 13D/A. Not applicable. Mubbadrah Investment LLC /s/ Hilal Al Busaidi 02/12/2026 /s/ Yasser Al Barami 02/12/2026 Wild Investment LLC /s/ Yasser Al Barami 02/12/2026 Myrad Investment LLC /s/ Hilal Al Busaidi 02/12/2026 Yasser Al Barami /s/ Yasser Al Barami 02/12/2026 Hilal Al Busaidi /s/ Hilal Al Busaidi 02/12/2026