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X0202 SCHEDULE 13D/A 0001273693 XXXXXXXX LIVE 2 Class A Common Stock, par value $0.0001 per share 04/28/2026 0001850270 74291D104 ProKidney Corp. 2000 FRONTIS PLAZA BLVD. SUITE 250 WINSTON-SALEM NC 27103 Control Empresarial 52 55 56 25 49 56 Paseo de las Palmas 781, 6th Floor Lomas de Chapultepec, Section III Mexico City O5 11000 Kyle A. Harris, Esq. (212) 225-2000 Cleary Gottlieb Steen & Hamilton LLP One Liberty Plaza New York NY 10006 Y Carlos Slim Helu WC O5 0 73842723 0 73842723 73842723 36.0 IN Based on 205,061,550 shares of Class A Common Stock (as defined in Item 1 below) outstanding, which is the sum of (i) 141,942,905 shares of Class A Common Stock outstanding as of March 17, 2026, as disclosed in the Issuer's Annual Report on Form 10-K filed with the SEC on March 18, 2026 and (ii) 63,118,645 shares of Class A Common Stock issued by the Issuer to the Reporting Persons upon exchange of the Paired Interests (as defined in Item 4 below) held by Control Empresarial on the Transaction Date (as defined in Item 4 below). Y Carlos Slim Domit WC O5 0 73842723 0 73842723 73842723 36.0 IN Based on 205,061,550 shares of Class A Common Stock outstanding, which is the sum of (i) 141,942,905 shares of Class A Common Stock outstanding as of March 17, 2026, as disclosed in the Issuer's Annual Report on Form 10-K filed with the SEC on March 18, 2026 and (ii) 63,118,645 shares of Class A Common Stock issued by the Issuer to the Reporting Persons upon exchange of the Paired Interests held by Control Empresarial on the Transaction Date. Y Marco Antonio Slim Domit WC O5 0 73842723 0 73842723 73842723 36.0 IN Based on 205,061,550 shares of Class A Common Stock outstanding, which is the sum of (i) 141,942,905 shares of Class A Common Stock outstanding as of March 17, 2026, as disclosed in the Issuer's Annual Report on Form 10-K filed with the SEC on March 18, 2026 and (ii) 63,118,645 shares of Class A Common Stock issued by the Issuer to the Reporting Persons upon exchange of the Paired Interests held by Control Empresarial on the Transaction Date. Y Patrick Slim Domit WC O5 0 73842723 0 73842723 73842723 36.0 IN Based on 205,061,550 shares of Class A Common Stock outstanding, which is the sum of (i) 141,942,905 shares of Class A Common Stock outstanding as of March 17, 2026, as disclosed in the Issuer's Annual Report on Form 10-K filed with the SEC on March 18, 2026 and (ii) 63,118,645 shares of Class A Common Stock issued by the Issuer to the Reporting Persons upon exchange of the Paired Interests held by Control Empresarial on the Transaction Date. Y Maria Soumaya Slim Domit WC O5 0 73842723 0 73842723 73842723 36.0 IN Based on 205,061,550 shares of Class A Common Stock outstanding, which is the sum of (i) 141,942,905 shares of Class A Common Stock outstanding as of March 17, 2026, as disclosed in the Issuer's Annual Report on Form 10-K filed with the SEC on March 18, 2026 and (ii) 63,118,645 shares of Class A Common Stock issued by the Issuer to the Reporting Persons upon exchange of the Paired Interests held by Control Empresarial on the Transaction Date. Y Vanessa Paola Slim Domit WC O5 0 73842723 0 73842723 73842723 36.0 IN Based on 205,061,550 shares of Class A Common Stock outstanding, which is the sum of (i) 141,942,905 shares of Class A Common Stock outstanding as of March 17, 2026, as disclosed in the Issuer's Annual Report on Form 10-K filed with the SEC on March 18, 2026 and (ii) 63,118,645 shares of Class A Common Stock issued by the Issuer to the Reporting Persons upon exchange of the Paired Interests held by Control Empresarial on the Transaction Date. Y Johanna Monique Slim Domit WC O5 0 73842723 0 73842723 73842723 36.0 IN Based on 205,061,550 shares of Class A Common Stock outstanding, which is the sum of (i) 141,942,905 shares of Class A Common Stock outstanding as of March 17, 2026, as disclosed in the Issuer's Annual Report on Form 10-K filed with the SEC on March 18, 2026 and (ii) 63,118,645 shares of Class A Common Stock issued by the Issuer to the Reporting Persons upon exchange of the Paired Interests held by Control Empresarial on the Transaction Date. 0001273693 N Control Empresarial de Capitales S.A. de C.V. WC O5 0 73842723 0 73842723 73842723 36.0 CO HC Based on 205,061,550 shares of Class A Common Stock outstanding, which is the sum of (i) 141,942,905 shares of Class A Common Stock outstanding as of March 17, 2026, as disclosed in the Issuer's Annual Report on Form 10-K filed with the SEC on March 18, 2026 and (ii) 63,118,645 shares of Class A Common Stock issued by the Issuer to the Reporting Persons upon exchange of the Paired Interests held by Control Empresarial on the Transaction Date. Class A Common Stock, par value $0.0001 per share ProKidney Corp. 2000 FRONTIS PLAZA BLVD. SUITE 250 WINSTON-SALEM NC 27103 This Amendment No. 2 (the "Second Amendment") amends and supplements the Schedule 13D filed with the Securities and Exchange Commission (the "SEC") on July 22, 2022 by the Reporting Persons, as amended and supplemented by Amendment No. 1 filed on June 25, 2024 (the "Original Schedule 13D" and, as amended by this Second Amendment, the "Schedule 13D") with respect to the shares of Class A common stock, $0.0001 par value (the "Class A Common Stock") of ProKidney Corp (the "Issuer" or "ProKidney"). Capitalized terms used but not otherwise defined in this Second Amendment have the meanings ascribed to such terms in the Original Schedule 13D. This Second Amendment supplements Item 4 and amends and restates Items 5(a)-(c) as set forth below. Delaware Domestication On July 1, 2025, the Issuer effected a domestication from the Caymans Islands to the State of Delaware (the "Domestication"). Effective as of July 1, 2025, each (i) Class A ordinary share automatically converted into one share of Class A Common Stock of the Issuer and (ii) each Class B ordinary share automatically converted into one share of Class B common stock of the Issuer. Exchange Agreement Prior to April 28, 2026 (the "Transaction Date"), in addition to 10,724,078 shares of Class A Common Stock, the Reporting Persons beneficially owned 63,118,645 shares of Class B common stock of the Issuer held by Control Empresarial, each of which may, subject to the limitations set forth in the Amended and Restated Exchange Agreement and the Holdings LLCA (each as defined and as described in the Issuer's Current Report on Form 8-K filed with the SEC on July 3, 2025), be exchanged, together with the paired common unit in ProKidney Holdings, LLC (the "Paired Interests"), for a share of Class A Common Stock on a one-for-one basis. Control Empresarial held 63,118,645 Paired Interests prior to the Transaction Date. On the Transaction Date, Control Empresarial exchanged 63,118,645 Paired Interests for 63,118,645 shares of Class A Common Stock. As a result, as of the date of this filing, the Reporting Persons beneficially own 73,842,723 shares of Class A Common Stock. Calculations of the percentage of the Class A Common Stock beneficially owned by each Reporting Person are based on 205,061,550 shares of Class A Common Stock outstanding, which is the sum of (i) 141,942,905 shares of Class A Common Stock outstanding as of March 17, 2026, as disclosed in the Issuer's Annual Report on Form 10-K filed with the SEC on March 18, 2026 and (ii) 63,118,645 shares of Class A Common Stock issued by the Issuer to the Reporting Persons upon exchange of the Paired Interests held by Control Empresarial on the Transaction Date. As of the date of this filing, (i) Control Empresarial, directly or indirectly, owns 73,842,723 shares of Class A Common Stock (representing a 36.0% of the outstanding shares of Class A Common Stock ), and (ii) the Slim Family, which are beneficiaries of a Mexican trust that owns all of the issued and outstanding voting equity securities of Control Empresarial, may be deemed to beneficially own indirectly the Class A Common Stock beneficially owned directly by Control Empresarial. 73,842,723 shares of Class A Common Stock (representing a 36.0% of the outstanding shares of Class A Common Stock. Except as set forth in Item 4 of this Second Amendment, no transactions have been effected by the Reporting Persons in the past sixty (60) days. Carlos Slim Helu /s/ Victor Manuel Gutierrez Lopez Victor Manuel Gutierrez Lopez, Attorney in Fact* 04/30/2026 Carlos Slim Domit /s/ Victor Manuel Gutierrez Lopez Victor Manuel Gutierrez Lopez, Attorney in Fact* 04/30/2026 Marco Antonio Slim Domit /s/ Victor Manuel Gutierrez Lopez Victor Manuel Gutierrez Lopez, Attorney in Fact* 04/30/2026 Patrick Slim Domit /s/ Victor Manuel Gutierrez Lopez Victor Manuel Gutierrez Lopez, Attorney in Fact* 04/30/2026 Maria Soumaya Slim Domit /s/ Victor Manuel Gutierrez Lopez Victor Manuel Gutierrez Lopez, Attorney in Fact* 04/30/2026 Vanessa Paola Slim Domit /s/ Victor Manuel Gutierrez Lopez Victor Manuel Gutierrez Lopez, Attorney in Fact* 04/30/2026 Johanna Monique Slim Domit /s/ Victor Manuel Gutierrez Lopez Victor Manuel Gutierrez Lopez, Attorney in Fact* 04/30/2026 Control Empresarial de Capitales S.A. de C.V. /s/ Victor Manuel Gutierrez Lopez Victor Manuel Gutierrez Lopez, Attorney in Fact* 04/30/2026 * See the Powers of Attorney for the members of the Slim Family and Control Empresarial, which are filed as exhibits to the Schedule 13D/A filed by the Slim Family and Control Empresarial with the SEC on March 4, 2026 in connection with their beneficial ownership of shares of Class A Common Stock, $0.001 par value per share of PBF Energy Inc., are hereby incorporated herein by reference.