POS AM 1 ef20051372_posam.htm POS AM
As filed with the Securities and Exchange Commission on July 3, 2025
Registration No. 333-275701

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549



 POST-EFFECTIVE AMENDMENT NO. 1
to
FORM S-3
REGISTRATION STATEMENT

UNDER
THE SECURITIES ACT OF 1933



PROKIDNEY CORP.
(Exact name of registrant as specified in its charter)



Delaware
 
98-1586514
(State or other jurisdiction of incorporation or organization)
 
(IRS Employer Identification No.)
2000 Frontis Plaza Blvd.
Suite 250
Winston-Salem, NC 27103
(336) 999-7029
(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)



Bruce Culleton
Chief Executive Officer
ProKidney Corp.
2000 Frontis Plaza Blvd., Suite 250
Winston-Salem, NC 27103
(336) 999-7028
(Name, address, including zip code, and telephone number, including area code, of agent for service)



Copies to:
Stuart E. Leblang
John P. Clayton
Eric H. Wexler
Akin Gump Strauss Hauer & Feld LLP
One Bryant Park
Bank of America Tower
New York, NY 10036
(214) 969-2701



Approximate date of commencement of proposed sale to the public: From time to time after the effective date of this registration statement as determined by the registrant.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box: ☐



If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box: ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☐

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☐
Accelerated filer ☐
Non-accelerated filer ☒
Smaller reporting company ☒
 
Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of Securities Act. ☐

THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF THE SECURITIES ACT OF 1933, AS AMENDED, OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME EFFECTIVE ON SUCH DATE AS THE SECURITIES AND EXCHANGE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a), MAY DETERMINE.


 EXPLANATORY NOTE

This Post-Effective Amendment No. 1 (this “Amendment”) to the Registration Statement on Form S-3 (File No. 333-275701) (the “Registration Statement”) is being filed pursuant to Rule 414(d) under the Securities Act of 1933, as amended (the “Securities Act”), by ProKidney Corp., a Delaware corporation (the “Company”), as the successor to ProKidney Corp., a Cayman Islands exempted company (“ProKidney Cayman”). Effective July 1, 2025, ProKidney Corp. changed its jurisdiction of incorporation from the Cayman Islands to the State of Delaware (the “Domestication”).  The Company expressly adopts the Registration Statement, as modified by this Amendment, as its own registration statement for all purposes of the Securities Act and the Securities Exchange Act of 1934, as amended (the “Exchange Act”).
 
For the purposes of this Amendment and the Registration Statement, references to the “Company,” “ProKidney,” the “Registrant,” “we,” “our,” “us” and similar terms mean, as of any time prior to the Domestication, ProKidney Cayman and, as of any time after the Domestication, ProKidney Corp., a Delaware corporation. The information contained in this Amendment sets forth additional information to reflect the Domestication. All documents filed by the Company under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act before the effective date of the Domestication will not reflect the change in our jurisdiction of incorporation or capital structure.
 
For additional information regarding the Domestication, please see the section titled “Special Note Regarding the Domestication” in the prospectus contained in this Amendment.


THE INFORMATION IN THIS PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED. WE MAY NOT SELL THESE SECURITIES UNTIL THE REGISTRATION STATEMENT FILED WITH THE SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PROSPECTUS IS NOT AN OFFER TO SELL THESE SECURITIES AND IS NOT SOLICITING AN OFFER TO BUY THESE SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.

SUBJECT TO COMPLETION, DATED July 3, 2025

PROSPECTUS

ProKidney Corp.

$500,000,000

CLASS A COMMON STOCK
PREFERRED STOCK
DEBT SECURITIES
WARRANTS
RIGHTS
UNITS



This prospectus will allow us to issue, from time to time at prices and on terms to be determined at or prior to the time of the offering, up to $500,000,000 of any combination of the securities described in this prospectus, either individually or in units. We may also offer shares of Class A common stock or shares of preferred stock upon conversion of or exchange for the debt securities; shares of Class A common stock upon conversion of or exchange for preferred stock; or shares of Class A common stock, shares of preferred stock or debt securities upon the exercise of warrants or rights; or any combination of these securities.

This prospectus describes the general terms of these securities and the general manner in which these securities will be offered. We will provide you with the specific terms of any offering in one or more supplements to this prospectus. The prospectus supplements will also describe the specific manner in which these securities will be offered and may also supplement, update or amend information contained in this document. You should read this prospectus and any prospectus supplement, as well as any documents incorporated by reference into this prospectus or any prospectus supplement, carefully before you invest.

Our securities may be sold directly by us to you, through agents designated from time to time or to or through underwriters or dealers. For additional information on the methods of sale, you should refer to the section entitled “Plan of Distribution” in this prospectus and in the applicable prospectus supplement. If any underwriters or agents are involved in the sale of our securities with respect to which this prospectus is being delivered, the names of such underwriters or agents and any applicable fees, commissions or discounts and over-allotment options will be set forth in a prospectus supplement. The price to the public of such securities and the net proceeds that we expect to receive from such sale will also be set forth in a prospectus supplement.

Shares of our Class A common stock are listed on the Nasdaq Capital Market under the symbol “PROK.” On July 1, 2025, the last reported sale price of shares of our Class A common stock was $0.5650 per share. The applicable prospectus supplement will contain information, where applicable, as to any other listing, if any, on the Nasdaq Capital Market or any securities market or other securities exchange of the securities covered by the prospectus supplement. Prospective purchasers of our securities are urged to obtain current information as to the market prices of our securities, where applicable.


Investing in our securities involves a high degree of risk. See “Risk Factors” included in any accompanying prospectus supplement and in the documents incorporated by reference in this prospectus for a discussion of the factors you should carefully consider before deciding to purchase these securities.

This prospectus may not be used to sell securities unless accompanied by a prospectus supplement.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.


The date of this prospectus is                , 2025.


TABLE OF CONTENTS

PAGE

1
   
2
   
5
   
6
   
7
   
9
   
10
   
12
   
18
   
25
   
27
   
29
   
30
   
31
   
31
   
31
   
31

ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement that we filed with the Securities and Exchange Commission (the “SEC”) utilizing a “shelf” registration process. Under this shelf registration process, we may offer our Class A common stock and preferred stock, various series of debt securities and/or warrants or rights to purchase any such securities, either individually or in units, in one or more offerings, with a total value of up to $500,000,000. This prospectus provides you with a general description of the securities we may offer. Each time we offer a type or series of securities under this prospectus, we will provide a prospectus supplement that will contain specific information about the terms of that offering.

This prospectus does not contain all of the information included in the registration statement. For a more complete understanding of the offering of the securities, you should refer to the registration statement, including its exhibits. The prospectus supplement may also add, update or change information contained or incorporated by reference in this prospectus. However, no prospectus supplement will offer a security that is not registered and described in this prospectus at the time of its effectiveness. This prospectus, together with the applicable prospectus supplements and the documents incorporated by reference into this prospectus, includes all material information relating to the offering of securities under this prospectus. You should carefully read this prospectus, the applicable prospectus supplement, the information and documents incorporated herein by reference and the additional information under the heading “Where You Can Find More Information” before making an investment decision.

You should rely only on the information we have provided or incorporated by reference in this prospectus or any prospectus supplement. We have not authorized anyone to provide you with information different from that contained or incorporated by reference in this prospectus. No dealer, salesperson or other person is authorized to give any information or to represent anything not contained or incorporated by reference in this prospectus. You must not rely on any unauthorized information or representation. This prospectus is an offer to sell only the securities offered hereby, but only under circumstances and in jurisdictions where it is lawful to do so. You should assume that the information in this prospectus or any prospectus supplement is accurate only as of the date on the front of the document and that any information we have incorporated herein by reference is accurate only as of the date of the document incorporated by reference, regardless of the time of delivery of this prospectus or any sale of a security.

We further note that the representations, warranties and covenants made by us in any agreement that is filed as an exhibit to any document that is incorporated by reference in this prospectus were made solely for the benefit of the parties to such agreement, including, in some cases, for the purpose of allocating risk among the parties to such agreements, and should not be deemed to be a representation, warranty or covenant to you. Moreover, such representations, warranties or covenants were accurate only as of the date when made. Accordingly, such representations, warranties and covenants should not be relied on as accurately representing the current state of our affairs.

This prospectus may not be used to consummate sales of our securities, unless it is accompanied by a prospectus supplement. To the extent there are inconsistencies between any prospectus supplement, this prospectus and any documents incorporated by reference, the document with the most recent date will control.

Unless the context otherwise requires, “ProKidney,” “PROK,” “the Company,” “we,” “us,” “our” and similar terms refer to, as of any time prior to the Domestication, ProKidney Cayman and, as of any time after the Domestication, ProKidney Corp., a Delaware corporation and, in each case, our subsidiaries.

PROSPECTUS SUMMARY

The following is a summary of what we believe to be the most important aspects of our business and the offering of our securities under this prospectus. We urge you to read this entire prospectus, including the more detailed consolidated financial statements, notes to the consolidated financial statements and other information incorporated by reference from our other filings with the SEC or included in any applicable prospectus supplement. Investing in our securities involves risks. Therefore, carefully consider the risk factors set forth in any prospectus supplements and in our most recent annual and quarterly filings with the SEC, as well as other information in this prospectus and any prospectus supplements and the documents incorporated by reference herein or therein, before purchasing our securities. Each of the risk factors could adversely affect our business, operating results and financial condition, as well as adversely affect the value of an investment in our securities.

About ProKidney Corp.

We are a clinical-stage biotechnology company with a transformative proprietary cell therapy platform that has the potential to treat multiple chronic kidney diseases using a patient’s own cells isolated from the patient intended for treatment. Our approach seeks to redefine the treatment of chronic kidney disease (“CKD”), shifting the emphasis away from management of kidney failure to the preservation of kidney function. Our lead product candidate, rilparencel, is designed to preserve kidney function in a CKD patient’s diseased kidneys. Rilparencel is a product that includes autologous Selected Renal Cells (“SRC”) prepared from a patient’s own kidney cells. SRC are formulated into a product for reinjection into the patient’s kidneys using a minimally invasive outpatient procedure that is repeatable, if necessary. Because rilparencel is a personalized treatment composed of cells prepared from a patient’s own kidney, there is no need for treatment with immunosuppressive therapies that are required during a patient’s lifetime when a patient receives a kidney transplant from another, allogeneic donor.

We are currently conducting a Phase 3 development program and an ongoing Phase 2 clinical trial for rilparencel in subjects with moderate to severe CKD and diabetes. Rilparencel has received regenerative medicine advanced therapy designation from the United States Food and Drug Administration (“FDA”). We also completed a Phase 1 clinical trial for rilparencel in subjects with CKD due to congenital anomalies of the kidney and urinary tract for which the last subject visit occurred in January 2023 and the clinical study report was submitted to the FDA in December 2023. Rilparencel has, to date, been generally well tolerated by subjects with moderate to severe CKD in Phase 1 and 2 clinical testing.

Since our inception, we have devoted substantially all of our resources to organizing and staffing our Company, business and scientific planning, conducting discovery and research activities, acquiring or discovering product candidates, establishing and protecting our intellectual property portfolio, developing and progressing rilparencel, raising capital and preparing for clinical trials, establishing arrangements with third parties for the manufacture of component materials, and providing general and administrative support for these operations. We do not have any product candidates approved for sale and have not generated any revenue from product sales.

Additional Information

For additional information related to our business and operations, please refer to the reports incorporated herein by reference, as described under the caption “Incorporation of Documents by Reference” on page 31 of this prospectus.

Our Corporate Information

Prior to July 11, 2022, we were a blank check company incorporated with limited liability under the laws of the Cayman Islands and formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses. We entered into a business combination agreement, dated as of January 18, 2022 with ProKidney LP (“PKLP”) (the “Business Combination”). As a result of the closing (the “Closing”) of the Business Combination, our name was changed from Social Capital Suvretta Holdings Corp. III to ProKidney Corp. We are organized in an umbrella partnership-C corporation structure. Prior to the Domestication and the consummation of certain other restructuring transactions on or about the same date (collectively, the “Restructuring”), the Company’s direct assets consisted of common units in PKLP and all of the issued and outstanding equity interests of ProKidney Corp. GP Limited, which became the general partner of PKLP upon the Closing. As a result of the Restructuring, the Company’s direct assets consist of common units in ProKidney Holdings, LLC, a Delaware limited liability company (“ProKidney Holdings”). Substantially all of the operating assets and business of the Company are held or conducted indirectly through ProKidney Holdings.

Effective July 1, 2025, we changed our jurisdiction of incorporation from the Cayman Islands to the State of Delaware. Prior to the closing of the Domestication, PKLP contributed substantially all of its assets to a newly formed subsidiary, ProKidney Holdings, and PKLP made a liquidating distribution of its limited liability company interests in ProKidney Holdings to its partners, including us. Following the Domestication, ProKidney, a wholly owned subsidiary of ProKidney Holdings and a Cayman Islands exempted company (“ProKidney-KY”), underwent a series of transactions to move its assets to Delaware through a reregistration of ProKidney-KY to a Cayman Islands limited liability company and then the domestication of such Cayman Islands limited liability company to Delaware as a Delaware limited liability company named ProKidney IPCo, LLC.

Our corporate headquarters are located at 2000 Frontis Plaza Boulevard, Suite 250, Winston-Salem, North Carolina 27103 and our telephone number is (336) 999-7029. We maintain a website at www.prokidney.com, to which we regularly post copies of our press releases as well as additional information about us. The information contained on, or that can be accessed through, our website is not a part of this prospectus. We have included our website address in this prospectus solely as an inactive textual reference.

Our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and all amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act are available free of charge through the investor relations page of our website as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC.

All brand names or trademarks appearing in this prospectus are the property of their respective holders. Use or display by us of other parties’ trademarks, trade dress, or products in this prospectus is not intended to, and does not, imply a relationship with, or endorsements or sponsorship of, us by the trademark or trade dress owners.

Offerings Under This Prospectus

Under this prospectus, we may offer shares of our Class A common stock and preferred stock, various series of debt securities and/or warrants or rights to purchase any of such securities, either individually or in units, with a total value of up to $500,000,000, from time to time at prices and on terms to be determined by market conditions at the time of the offering. This prospectus provides you with a general description of the securities we may offer. Each time we offer a type or series of securities under this prospectus, we will provide a prospectus supplement that will describe the specific amounts, prices and other important terms of the securities, including, to the extent applicable:


designation or classification;

aggregate principal amount or aggregate offering price;

maturity, if applicable;

rates and times of payment of interest or dividends, if any;

redemption, conversion or sinking fund terms, if any;

voting or other rights, if any; and

conversion or exercise prices, if any.

The prospectus supplement also may add, update or change information contained in this prospectus or in documents we have incorporated by reference into this prospectus. However, no prospectus supplement will fundamentally change the terms that are set forth in this prospectus or offer a security that is not registered and described in this prospectus at the time of its effectiveness.

We may sell the securities directly to investors or to or through agents, underwriters or dealers. We, and our agents or underwriters, reserve the right to accept or reject all or part of any proposed purchase of securities. If we offer securities through agents or underwriters, we will include in the applicable prospectus supplement:


the names of those agents or underwriters;

applicable fees, discounts and commissions to be paid to them;

details regarding over-allotment options, if any; and

the net proceeds to us.

 This prospectus may not be used to consummate a sale of any securities unless it is accompanied by a prospectus supplement.

SPECIAL NOTE REGARDING THE DOMESTICATION

Effective July 1, 2025, ProKidney Corp. changed its jurisdiction of incorporation from the Cayman Islands to the State of Delaware. The Domestication was effected in the manner described in ProKidney’s registration statement on Form S-4 (the “Form S-4”), which was filed with the SEC on March 31, 2025 (File No. 333-286278). In the Domestication, ProKidney Corp. deregistered as an exempted company in the Cayman Islands pursuant to Sections 206 and 207 of the Companies Act (as amended) of the Cayman Islands and continued its existence under the General Corporation Law of the State of Delaware (the “DGCL”) as a corporation incorporated in the State of Delaware pursuant to Section 388 of the DGCL.
 
Our consolidated business, operations, assets and liabilities, as well as our principal locations (other than our registered office in the Cayman Islands) and fiscal year, were the same immediately after the Domestication as they were immediately prior to the Domestication. In addition, the directors and executive officers of the Company immediately after the Domestication were the same individuals who were directors and executive officers, respectively, of ProKidney Cayman immediately prior to the Domestication.
 
Shares of the Company’s Class A common stock continues to be listed for trading on the Nasdaq Capital Market (“Nasdaq”) under the ticker symbol “PROK.” Upon effectiveness of the Domestication, the Company’s CUSIP number relating to its Class A common stock changed to 74291D 104.
 
In connection with the Domestication, (i) the outstanding Class A ordinary shares of ProKidney Cayman, par value $0.0001 per share, including fractions of ordinary shares, converted by operation of law into an equivalent number of shares (or fractions thereof) of Class A common stock of the Company, par value $0.0001 per share, and (ii) the outstanding Class B ordinary shares of ProKidney Cayman, par value $0.0001 per share, including fractions of ordinary shares, converted by operation of law into an equivalent number of shares (or fractions thereof) of Class B common stock of the Company, par value $0.0001 per share. The number of shares of Class A common stock of the Company outstanding immediately after the Domestication was the same as the number of ordinary shares of ProKidney Cayman outstanding immediately prior to the Domestication. Consequently, each holder of a Class A ordinary share (or fraction thereof) or Class B ordinary share (or fraction thereof) of ProKidney Cayman immediately prior to the Domestication held, immediately thereafter, a share of Class A common stock (or fraction thereof) or Class B common stock (or fraction thereof) of the Company representing the same proportional equity interest in the Company as that shareholder held in ProKidney Cayman and representing the same class of shares.
 
The rights of holders of the Company’s Class A common stock are now governed by the Company’s Delaware certificate of incorporation (the “Charter”), its Delaware by-laws (the “Bylaws”) and the DGCL, each of which is described in ProKidney Cayman’s final prospectus relating to the Domestication, which was filed with the Commission pursuant to Rule 424(b)(3) on April 28, 2025 (the “Final Prospectus”). The Final Prospectus is part of the Form S-4.

RISK FACTORS

An investment in our securities involves a high degree of risk. Before making an investment decision you should carefully read and consider the risks and uncertainties and all of the other information, documents or reports included or incorporated by reference in this prospectus, including, without limitation, the risk factors in the section entitled “Risk Factors” in our most recent Annual Report on Form 10-K, which is on file with the SEC and incorporated by reference in this prospectus, and our Quarterly Report on Form 10-Q for the quarter ended March 31, 2025, which is incorporated herein by reference (as such risk factors may be updated in our other filings with the SEC pursuant to Sections 13(a), 13(c), 14, or 15(d) of the Exchange Act), as well as the risk factors set forth in any applicable prospectus supplement and the other reports we file from time to time with the SEC that are incorporated by reference in this prospectus. If any of the risks set forth in such “Risk Factors” disclosures actually occur, our business, financial condition, and/or results of operations could suffer. In that case, the market price of our securities offered by this prospectus could decline, and you may lose all or part of your investment. Additional risks and uncertainties that we do not presently know or that we currently deem immaterial may also have a material adverse effect on our business. See “Where You Can Find More Information” included elsewhere in this prospectus.

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus and the information incorporated by reference herein include “forward-looking statements” within the meaning of Section 27A of the Securities Act, and Section 21E of the Exchange Act. All statements, other than statements of historical facts, included in this prospectus and the information incorporated by reference herein regarding our strategy, future operations, future financial position, future revenue, projected costs, prospects, plans, objectives of management, potential results of our drug development efforts or trials, the effects of competition and expected market growth are forward-looking statements. The words “anticipate,” “believe,” “contemplate,” “seeks,” “estimate,” “expect,” “forecast,” “intend,” “may,” “plan,” “predict,” “project,” “target,” “potential,” “will,” “would,” “could,” “should,” “continue” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. These forward-looking statements may include, among other things, statements about:


our ability to maintain the listing of our Class A common stock on Nasdaq;


our ability to manage our growth effectively;


the success, cost and timing of our product development activities;


the potential attributes and benefits of our product candidates, and if approved, our products;


our ability to manufacture rilparencel, our lead product candidate;


our ability to obtain and maintain regulatory approval for our products, and any related restrictions and limitations of any approved product;


our ability to identify, in-license or acquire additional technology;


our ability to maintain our existing license, manufacturing and supply agreements;


our reliance on third parties to conduct, supervise and monitor a certain portion of our research and nonclinical testing and clinical trials for rilparencel;


our ability to compete with other companies currently marketing or engaged in the biologics market and in the area of treatment of kidney disease, many of which have greater financial and marketing resources than us;


the size and growth potential of the markets for our products, and the ability of each to serve those markets, either alone or in partnership with others;


changes in applicable laws or regulations;


our estimates regarding expenses, revenue, capital requirements and needs for additional financing;


our ability to raise financing in the future;


our financial performance;


our intellectual property rights;


security breaches with respect to computer systems;


economic downturns and political and market conditions beyond our control;


the anticipated use of proceeds from this offering, if any;


our ability to take advantage of the potential strategic opportunities provided by, and realize the potential benefits of, the Domestication;


the risk that the Domestication disrupts current plans and operations;


the risk that stockholders may recognize gain or other income with respect to their shares at the effective time of the Domestication;


anti-takeover provisions in our organizational documents and under Delaware law could make an acquisition of us more difficult and limit attempts by our stockholders to replace or remove our current management;


our organizational documents designate the state courts in the State of Delaware or, if no state court located within the State of Delaware has jurisdiction, the federal court for the District of Delaware, as the sole and exclusive forum for certain types of actions and proceedings that may be initiated by our stockholders, which could discourage lawsuits against us and our directors and officers;


even if the Domestication qualifies as a reorganization under Section 368(a) of the Internal Revenue Code of 1986, as amended (the “Code”), a U.S. stockholder may still recognize gain or other income with respect to their shares at the effective time of the Domestication;


we are likely to be treated as a passive foreign investment company (“PFIC”) which could result in adverse United States federal income tax consequences to U.S. investors; and


other factors detailed under the section titled “Risk Factors.”

We may not actually achieve the plans, intentions or expectations disclosed in our forward-looking statements, and you should not place undue reliance on our forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in the forward-looking statements we make. We have included important factors in the cautionary statements included in this prospectus and the information incorporated by reference herein, particularly in the “Risk Factors” sections of this prospectus, of our Annual Report on Form 10-K for the year ended December 31, 2024 and of our Quarterly Report on Form 10-Q for the quarter ended March 31, 2025, which are incorporated by reference herein, that could cause actual results or events to differ materially from the forward-looking statements that we make. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures or investments that we may make.

You should read this prospectus and the information incorporated by reference herein completely and with the understanding that our actual future results may be materially different from what we expect. Any forward-looking statement speaks only as of the date of this prospectus. We do not assume any obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

USE OF PROCEEDS

Unless otherwise indicated in the applicable prospectus supplement, we intend to use any net proceeds from the sale of securities under this prospectus, if any, for clinical trial costs and other research and development expenses, continued investment in our drug development platform, for our pre-commercial and commercial activities, including our commercial manufacturing facility, and for other general corporate purposes, including for working capital, capital expenditures and general and administrative expenses. We have not determined the amounts we plan to spend on any of the areas listed above or the timing of these expenditures. As a result, our management will have broad discretion to allocate the net proceeds, if any, we receive in connection with securities offered pursuant to this prospectus for any purpose. Pending application of the net proceeds as described above, we may initially invest the net proceeds in short-term, investment-grade, or interest-bearing securities.

PLAN OF DISTRIBUTION

We may offer securities under this prospectus from time to time pursuant to underwritten public offerings, negotiated transactions, block trades or a combination of these methods. We may sell the securities (1) through underwriters or dealers, (2) through agents or (3) directly to one or more purchasers, or through a combination of such methods. We may distribute the securities from time to time in one or more transactions at:


a fixed price or prices, which may be changed from time to time;


market prices prevailing at the time of sale;


prices related to the prevailing market prices; or


negotiated prices.

Any public offering price, dealer purchase price, discount, or commission may be changed from time to time.

We may directly solicit offers to purchase the securities being offered by this prospectus. We may also designate agents to solicit offers to purchase the securities from time to time and may enter into arrangements for “at-the-market,” equity line or similar transactions. We will name in a prospectus supplement any underwriter or agent involved in the offer or sale of the securities.

If we utilize a dealer in the sale of the securities being offered by this prospectus, we will sell the securities to the dealer, as principal. The dealer may then resell the securities to the public at varying prices to be determined by the dealer at the time of resale.

If we utilize an underwriter in the sale of the securities being offered by this prospectus, we will execute an underwriting agreement with the underwriter at the time of sale, and we will provide the name of any underwriter in the prospectus supplement which the underwriter will use to make resales of the securities to the public. In connection with the sale of the securities, we, or the purchasers of the securities for whom the underwriter may act as agent, may compensate the underwriter in the form of underwriting discounts or commissions. The underwriter may sell the securities to or through dealers, and the underwriter may compensate those dealers in the form of discounts, concessions or commissions.

With respect to underwritten public offerings, negotiated transactions and block trades, we will provide in the applicable prospectus supplement information regarding any compensation we pay to underwriters, dealers or agents in connection with the offering of the securities, and any discounts, concessions or commissions allowed by underwriters to participating dealers. Underwriters, dealers and agents participating in the distribution of the securities may be deemed to be underwriters within the meaning of the Securities Act, and any discounts and commissions received by them and any profit realized by them on resale of the securities may be deemed to be underwriting discounts and commissions. We may enter into agreements to indemnify underwriters, dealers and agents against civil liabilities, including liabilities under the Securities Act, or to contribute to payments they may be required to make in respect thereof.

If so indicated in the applicable prospectus supplement, we will authorize underwriters, dealers or other persons acting as our agents to solicit offers by certain institutions to purchase securities from us pursuant to delayed delivery contracts providing for payment and delivery on the date stated in each applicable prospectus supplement. Each contract will be for an amount not less than, and the aggregate amount of securities sold pursuant to such contracts shall not be less nor more than, the respective amounts stated in each applicable prospectus supplement. Institutions with whom the contracts, when authorized, may be made include commercial and savings banks, insurance companies, pension funds, investment companies, educational and charitable institutions and other institutions, but shall in all cases be subject to our approval. Delayed delivery contracts will not be subject to any conditions except that:


the purchase by an institution of the securities covered under that contract shall not at the time of delivery be prohibited under the laws of the jurisdiction to which that institution is subject; and


if the securities are also being sold to underwriters acting as principals for their own account, the underwriters shall have purchased such securities not sold for delayed delivery. The underwriters and other persons acting as our agents will not have any responsibility in respect of the validity or performance of delayed delivery contracts.

One or more firms, referred to as “remarketing firms,” may also offer or sell the securities, if a prospectus supplement so indicates, in connection with a remarketing arrangement upon their purchase. Remarketing firms will act as principals for their own accounts or as our agents. These remarketing firms will offer or sell the securities in accordance with the terms of the securities. Each prospectus supplement will identify and describe any remarketing firm and the terms of its agreement, if any, with us and will describe the remarketing firm’s compensation. Remarketing firms may be deemed to be underwriters in connection with the securities they remarket. Remarketing firms may be entitled under agreements that may be entered into with us to indemnification by us against certain civil liabilities, including liabilities under the Securities Act, and may be customers of, engage in transactions with or perform services for us in the ordinary course of business.

Certain underwriters may use this prospectus and any accompanying prospectus supplement for offers and sales related to market-making transactions in the securities. These underwriters may act as principal or agent in these transactions, and the sales will be made at prices related to prevailing market prices at the time of sale. Any underwriters involved in the sale of the securities may qualify as “underwriters” within the meaning of Section 2(a)(11) of the Securities Act. In addition, the underwriters’ commissions, discounts or concessions may qualify as underwriters’ compensation under the Securities Act and the rules of the Financial Industry Regulatory Authority, Inc.

Shares of our Class A common stock sold pursuant to the registration statement of which this prospectus is a part will be authorized for listing and trading on Nasdaq. The applicable prospectus supplement will contain information, where applicable, as to any other listing, if any, on Nasdaq or any securities market or other securities exchange of the securities covered by the prospectus supplement. Underwriters may make a market in shares of our Class A common stock but will not be obligated to do so and may discontinue any market making at any time without notice. We can make no assurance as to the liquidity of or the existence, development or maintenance of trading markets for any of the securities.

In order to facilitate the offering of the securities, certain persons participating in the offering may engage in transactions that stabilize, maintain or otherwise affect the price of the securities. This may include over-allotments or short sales of the securities, which involve the sale by persons participating in the offering of more securities than we sold to them. In these circumstances, these persons would cover such over-allotments or short positions by making purchases in the open market or by exercising their over-allotment option. In addition, these persons may stabilize or maintain the price of the securities by bidding for or purchasing the applicable security in the open market or by imposing penalty bids, whereby selling concessions allowed to dealers participating in the offering may be reclaimed if the securities sold by them are repurchased in connection with stabilization transactions. The effect of these transactions may be to stabilize or maintain the market price of the securities at a level above that which might otherwise prevail in the open market. These transactions may be discontinued at any time.

The underwriters, dealers and agents may engage in other transactions with us, or perform other services for us and our respective subsidiaries, in the ordinary course of their business.

DESCRIPTION OF CAPITAL STOCK

The following is a brief description of the material provisions of our shares. The Class A common stock is the only class of our securities registered pursuant to Section 12 of the Exchange Act. The following description of our shares does not purport to be complete and is subject to and qualified in its entirety by the Charter, the Bylaws and the applicable provisions of the DGCL. We encourage you to read the Charter, the Bylaws and the applicable provisions of the DGCL for more information.

Authorized and Outstanding Stock

The Charter authorizes the issuance of 1,250,000,000 shares of capital stock, consisting of:


700,000,000 shares of Class A common stock, par value $0.0001 per share (“Class A common stock”);


500,000,000 shares of Class B common stock, par value $0.0001 per share (“Class B common stock”); and


50,000,000 shares of preferred stock, par value $0.0001 per share (“preferred stock”).

As of July 1, 2025, there were 133,418,957 shares of Class A common stock and 159,288,931 shares of Class B common stock outstanding and approximately 44 holders of Class A common stock and 3 holders of Class B common stock of record.

Class A Common Stock

Voting Rights

Each holder of the shares of Class A common stock is entitled to one vote for each share of Class A common stock held of record by such holder on all matters on which stockholders generally are entitled to vote. The holders of the shares of Class A common stock do not have cumulative voting rights in the election of directors. Generally, all matters to be voted on by stockholders must be approved by the affirmative vote of a majority in voting power of shares of stock present in person or represented by proxy and entitled to vote thereon (or, in the case of election of directors, by a plurality of voting power of the outstanding shares present in person or represented by proxy and entitled to vote on the election of directors), except as otherwise provided by the Charter or any applicable law. Notwithstanding the foregoing, the holders of the outstanding shares of Class A common stock are entitled to vote separately upon any amendment to the Charter (including by merger, consolidation, reorganization or similar event) that would alter or change the powers, preferences or special rights of such class of common stock in a manner that is adverse as compared to the Class B common stock (in addition to any other class vote required by applicable law).

Dividend Rights

Subject to applicable law and the preferences that may be applicable to any shares of preferred stock then outstanding, the holders of shares of Class A common stock are entitled to receive ratably such dividends, if any, as may be declared from time to time by the board of directors of the Company (the “Board”) out of assets of the Company legally available therefor.

Rights upon Liquidation, Dissolution and Winding-Up

Subject to applicable law, in the event of any voluntary or involuntary liquidation, dissolution or winding up of the Company’s affairs, after payment of the Company’s debts and other liabilities, and of preferential and other amounts, if any, to which the holders of preferred stock are entitled, if any, the holders of the shares of Class A common stock are entitled to (i) receive, pari passu with the holders of shares of Class B common stock, an amount per share equal to the par value thereof, and (ii) thereafter, to share ratably in all assets remaining and available for distribution.

Preemptive or Other Rights

The holders of shares of Class A common stock have no preemptive or conversion rights or other subscription rights (other than in connection with certain issuances of common units under the limited liability company agreement of ProKidney Holdings, LLC, a Delaware limited liability company (“ProKidney Holdings”)). There are no redemption or sinking fund provisions applicable to the shares of Class A common stock. The rights, preferences and privileges of holders of shares of Class A common stock are subject to those of the holders of any shares of preferred stock the Company may issue in the future.

Class B Common Stock

Voting Rights

Each holder of the shares of Class B common stock is entitled to one vote for each share of Class B common stock held of record by such holder on all matters on which stockholders generally are entitled to vote. The holders of the shares of Class B common stock do not have cumulative voting rights in the election of directors. Generally, all matters to be voted on by stockholders must be approved by the affirmative vote of a majority in voting power of shares of stock present in person or represented by proxy and entitle to vote thereon (or, in the case of election of directors, by a plurality of voting power of the outstanding shares present in person or represented by proxy and entitled to vote on the election of directors), except as otherwise provided by the certificate of incorporation of the Company or any applicable law. Notwithstanding the foregoing, the holders of the outstanding shares of Class B common stock are entitled to vote separately upon any amendment to the Charter (including by merger, consolidation, reorganization or similar event) that would alter or change the powers, preferences or special rights of such class of common stock in a manner that is adverse as compared to the Class A common stock (in addition to any other class vote required by applicable law).

Dividend Rights

Except as provided in the Charter with respect to stock dividends, dividends of cash or property may not be declared by the Board or paid on shares of Class B common stock.

Rights upon Liquidation, Dissolution and Winding-Up

In the event of any voluntary or involuntary liquidation, dissolution or winding up of the Company’s affairs, the holders of Class B common stock are not entitled to receive any assets of the Company in excess of the par value of such shares (which such payment shall be pari passu with the holders of outstanding shares of Class A common stock).

Preemptive or Other Rights

Certain holders of shares of Class B common stock, who are also holders of common units of ProKidney Holdings (or certain permitted transferees thereof), subject to the procedures and restrictions set forth in that certain Amended and Restated Exchange Agreement, dated as of July 1, 2025, by and among the Company, ProKidney Holdings and the other parties thereto (the “Exchange Agreement”), have the right to exchange one common unit of ProKidney Holdings and one share of Class B common stock (the “Paired Interest”) for one share of Class A common stock.

The holders of shares of Class B common stock do not have other preemptive, subscription, redemption or conversion rights. There is no redemption or sinking fund provisions applicable to the Class B common stock, other than with respect to the exchange of the Paired Interests for Class A common stock pursuant to the Exchange Agreement.

Issuance and Retirement of Class B Common Stock

In the event that any outstanding share of Class B common stock ceases to be held directly or indirectly by a holder of a corresponding common unit of ProKidney Holdings, such share will automatically be transferred to the Company for no consideration and thereupon will be retired.

Preferred Stock

No shares of preferred stock are currently issued or outstanding. The Charter authorizes the Board, subject to any limitations prescribed by the DGCL, by resolution or resolutions, at any time and from time to time, to provide, out of the authorized but unissued shares of preferred stock, for one or more series of preferred stock and, with respect to each such series, to fix the number of shares constituting such series, and the designation of such series, the voting powers (whether none, limited or full) of the shares of such series, and the powers, preferences and relative, participating, optional or other special rights, if any, and any qualifications, limitations or restrictions thereof, of the shares of such series and to cause to be filed with the Secretary of State of the State of Delaware a certificate of designation with respect thereto, provided that the aggregate number of shares issued and not retired of any and all such series shall not exceed the total number of shares of preferred stock authorized in the Charter. The powers, including voting powers (whether none, limited or full), preferences and relative, participating, optional and other special rights, if any, of each series of preferred stock, and the qualifications, limitations or restrictions thereof, if any, may differ from those of any and all other series at any time outstanding.

The issuance of preferred stock may have the effect of delaying, deferring or preventing a change in control of the Company without further action by the stockholders. Additionally, the issuance of preferred stock may adversely affect the holders of the common stock of the Company by restricting dividends on the shares of Class A common stock, diluting the voting power of the shares of Class A common stock and the shares of Class B common stock or subordinating the liquidation rights of the shares of Class A common stock. As a result of these or other factors, the issuance of preferred stock could have an adverse impact on the market price of the shares of Class A common stock. At present, we have no plans to issue any preferred stock.

Anti-Takeover Effects of Provisions of the Charter and the Bylaws

Certain provisions of the Charter and the Bylaws, as described below, could have the effect of delaying, deterring or preventing another party from acquiring or seeking to acquire control of the Company. These provisions are intended to discourage certain types of coercive takeover practices and inadequate takeover bids and to encourage anyone seeking to acquire control of the Company to negotiate first with the Board. However, these provisions may also delay, deter or prevent a change in control or other takeover of the Company that stockholders of the Company might consider to be in their best interests, including transactions that might result in a premium being paid over the market price of the common stock and also may limit the price that investors are willing to pay in the future for the common stock. These provisions may also have the effect of preventing changes in our management. We believe that the benefits of increased protection give the Company the potential ability to negotiate with the proponent of an unfriendly or unsolicited proposal to acquire or restructure the Company, and that the benefits of this increased protection outweigh the disadvantages of discouraging those proposals, because negotiation of those proposals could result in an improvement of their terms.

Classified Board

The Board is comprised of eight directors. The Charter provides that, subject to the right of holders of any series of preferred stock, the Board is divided into three classes of directors, apportioned to consist of, as nearly as possible, one third of the total number of directors, designated Class I, Class II and Class III, and with the directors serving staggered three-year terms, with only one class of directors being elected at each annual meeting. As a result, approximately one-third of the Board is elected each year.

The classification of directors has the effect of making it more difficult for members to change the composition of the Board. The Charter provides that the Board may increase or reduce the upper and lower limits of the number of directors by one or more resolutions of the Board, provided that in no event will a decrease in the number of directors shorten the term of any director then in office.

Stockholder Meetings

The Charter and the Bylaws provide that, subject to the rights of the holders of any outstanding series of preferred stock, special meetings of the Company’s stockholders may be called only by the chairperson of the Board, the chief executive officer or at the direction of the Board pursuant to a written resolution adopted by a majority of the total number of directors that the Company would have if there were no vacancies.

Stockholder Action by Consent

The Charter provides that any action required or permitted to be taken by the stockholders of the Company may be effected only at a duly called annual or special meeting of stockholders of the Company and may not be effected by any consent by such stockholders; provided, however, that any action required or permitted to be taken by the holders of Class B common stock, voting separately as a class, may be effected by the consent or consents (setting forth the action so taken) of the holders of the outstanding shares of Class B common stock having not less than the minimum number of votes that would be necessary to authorize or take such action at a meeting at which all shares entitled to vote thereon were present and voted, consenting together as a single class in lieu of a duly called annual or special meeting of holders of Class B common stock; provided, further, that any action required or permitted to be taken by the holders of any or all series of preferred stock voting separately as a series of preferred stock or separately as a class of preferred stock (including with respect to any such action specified in the Charter or any certificate of designation relating to any series of preferred stock) may be effected by the consent or consents (setting forth the action so taken), of the holders of outstanding shares of the relevant class or series of preferred stock having not less than the minimum number of votes that would be necessary to authorize or take such action at a meeting at which all shares entitled to vote thereon were present and voted.

Amendment of Bylaws

The Bylaws may generally be altered, amended or repealed, and new bylaws of the Company may be adopted, by:

the approval of a majority of the Board; or
 

the affirmative vote of holders of at least at least 66 2/3% of the voting power of all of the then-outstanding shares of the capital stock of the Company entitled to vote thereon, voting together as a single class.

Indemnification

The Charter requires that the Company indemnify (and advance expenses to) its directors and officers to the fullest extent permitted by law, provided that we are not required to indemnify (or advance expenses to) any director or officer in connection with any proceeding (or part thereof) initiated by such person unless (i) such indemnification is expressly required to be made by law, (ii) the proceeding was authorized by the Board, (iii) such indemnification is provided by the Company, in its sole discretion, pursuant to the powers vested in the Company under the DGCL or any other applicable law, or (iv) such indemnification is required to be made under the indemnification rights enforcement provision of the Bylaws.

Pursuant to the Charter, no director or officer of the Company is personally liable to the Company or its stockholders for monetary damages for any breach of fiduciary duty as a director or officer, except to the extent such exception from liability or limitation thereof is not permitted under the DGCL.  Currently, Delaware law prohibits corporations from eliminating or limiting the liability of:


a director or officer for any breach of the director’s or officer’s duty of loyalty to our company or our stockholders;


a director or officer for acts or omissions not in good faith or which involved intentional misconduct or a knowing violation of law;


a director for unlawful payments of dividends or unlawful stock repurchases or redemptions as provided in Section 174 of the DGCL;


a director or officer for any transaction from which the director or officer derived an improper personal benefit; and


An officer in any action by or in the right of the corporation. The limitation of liability of officers of ProKidney is limited only to persons who at the time of an act or omission as to which liability is asserted is deemed to have consented to service by the delivery of process to the registered agent of ProKidney pursuant to Section 3114(b) of Title 10 of the Delaware Code.

Anti‑Takeover Effects of Delaware Law
 
The Company is subject to Section 203 of the DGCL. Section 203 provides that the Company may not engage in a broad range of “business combinations” with any “interested stockholder” for a three-year period following the time that the person became an interested stockholder unless:


prior to such time the Board approved either the business combination or the transaction which resulted in the stockholder becoming an interested stockholder;


upon consummation of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of our voting stock outstanding at the time the transaction commenced, excluding for purposes of determining the voting stock outstanding (but not the outstanding voting stock owned by the interested stockholder) those shares owned (i) by persons who are directors and also officers and (ii) employee stock plans in which employee participants do not have the right to determine confidentially whether shares held subject to the plan will be tendered in a tender or exchange offer; or


at or subsequent to the time the business combination is approved by the Board and authorized at an annual or special meeting of the stockholders, and not by written consent, by the affirmative vote of at least 66 2/3% of the outstanding voting stock which is not owned by the interested stockholder.
 
Generally, a business combination includes a merger, consolidation, asset or stock sale, issuances of securities or other transaction resulting in a financial benefit to the interested stockholder. Subject to certain exceptions, an interested stockholder is a person who, together with that person’s affiliates and associates (as such terms are defined in Section 203 of the DGCL), owns (as such term is defined in Section 203 of the DGLC), or within the previous three years owned, 15% or more of our voting stock.

Section 203 could prohibit or delay mergers or other takeover or change in control attempts with respect to the Company and, accordingly, may discourage attempts to acquire the Company. Prior to the consummation of the Domestication, the board of directors of ProKidney Cayman adopted a resolution approving as an “interested stockholder” each shareholder of ProKidney Cayman who would otherwise become an “interested stockholder” of the Company as a result of the Domestication, together with their affiliates or associates, such that the restrictions on “business combinations” contained in Section 203 of the DGCL would not apply to any of such stockholders for purposes of Section 203 of the DGCL.

Exclusive Forum Provision

The Charter provides that, unless the Company consents in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware shall (or, if and only if the Court of Chancery of the State of Delaware lacks subject matter jurisdiction, any state court located within the State of Delaware or, if and only if all such state courts lack subject matter jurisdiction, the federal district court for the District of Delaware), to the fullest extent permitted by applicable law, be the sole and exclusive forum for (A) any derivative action or proceeding brought on behalf of the Company; (B) any action or proceeding (including any class action) asserting a claim of breach of a fiduciary duty owed by any current or former director, officer or other employee of the Company to the Company or the Company’s stockholders; (C) any action or proceeding (including any class action) asserting a claim against the Company or any current or former director, officer or other employee of the Company arising out of or pursuant to any provision of the DGCL, the Charter or the Bylaws (as each may be amended from time to time); (D) any action or proceeding (including any class action) to interpret, apply, enforce or determine the validity of the Charter or the Bylaws (including any right, obligation or remedy thereunder); (E) any action or proceeding as to which the DGCL confers jurisdiction to the Court of Chancery of the State of Delaware; and/or (F) any action or claim against the Company or any current or former director, officer or other employee of the Company governed by the internal affairs doctrine or an “internal corporate claim” as defined in Section 115 of the DGCL, in each case, subject to said court having personal jurisdiction over the indispensable parties named as defendants therein.

Transfer Agent and Registrar

The transfer agent and registrar for the Class A common stock and the Class B common stock is Continental Stock Transfer & Trust Company.

Listing

Our shares of Class A common stock are listed on Nasdaq under the symbol “PROK.”

DESCRIPTION OF DEBT SECURITIES

The following description, together with the additional information we include in any applicable prospectus supplements, summarizes the material terms and provisions of the debt securities that we may offer under this prospectus. While the terms we have summarized below will apply generally to any future debt securities we may offer pursuant to this prospectus, we will describe the particular terms of any debt securities that we may offer in more detail in the applicable prospectus supplement. If we so indicate in a prospectus supplement, the terms of any debt securities offered under such prospectus supplement may differ from the terms we describe below, and to the extent the terms set forth in a prospectus supplement differ from the terms described below, the terms set forth in the prospectus supplement shall control.

The debt securities (“Debt Securities”) will be either senior debt securities (“Senior Debt Securities”) or subordinated debt securities (“Subordinated Debt Securities”). The Senior Debt Securities and the Subordinated Debt Securities will be issued under separate indentures among us, the subsidiary guarantors of such Debt Securities, if any, each a Subsidiary Guarantor, if applicable, and a trustee to be determined, the Trustee. Senior Debt Securities will be issued under a senior indenture (“Senior Indenture”) and Subordinated Debt Securities will be issued under a subordinated indenture (“Subordinated Indenture” and together with the Senior Indenture, the “Indentures”). The form of each Indenture has been filed with the SEC as an exhibit to the registration statement of which this prospectus is a part, and you should read the Indentures for provisions that may be important to you.

The Indentures will be qualified under the Trust Indenture Act of 1939, as in effect on the date of the indenture. We use the term “debenture trustee” to refer to either the trustee under the senior indenture or the trustee under the subordinated indenture, as applicable. The following summaries of material provisions of the Debt Securities are subject to, and qualified in their entirety by reference to, all the provisions of the indenture applicable to a particular series of debt securities.

General

The Debt Securities may be issued from time to time in one or more series and may be denominated and payable in foreign currencies or units based on or relating to foreign currencies. Neither Indenture limits the amount of Debt Securities that may be issued thereunder, and each Indenture provides that the specific terms of the Debt Securities shall be set forth in, or determined pursuant to, an authorizing resolution and/or a supplemental indenture, if any, relating to such series.

The applicable prospectus supplement will contain, where applicable, the following terms of and other information relating to the Debt Securities:


the title of the Debt Securities;


the aggregate principal amount and any limit on the aggregate principal amount of the Debt Securities;


the currency or units based on or relating to currencies in which Debt Securities are denominated and the currency or units in which principal or interest or both will or may be payable;


whether we will issue the series of Debt Securities in global form, the terms of any global securities and who the depositary will be;


whether or not the Debt Securities will be secured or unsecured, and the terms of any secured debt;


our right, if any, to defer payment of interest and the maximum length of any such deferral period;


whether the Indenture will restrict our ability to pay dividends, or will require us to maintain any asset ratios or reserves;


whether we will be restricted from incurring any additional indebtedness;


a discussion on any material or special U.S. federal income tax considerations applicable to Debt Securities;


the denominations in which we will issue Debt Securities, if other than denominations of $1,000 and any integral multiple thereof;


whether the Debt Securities are Senior Debt Securities or Subordinated Debt Securities and, if Subordinated Debt Securities, the related subordination terms;


whether any Subsidiary Guarantor will provide a Subsidiary Guarantee of the Debt Securities;


each date on which the principal of the Debt Securities will be payable;


the interest rate, which may be fixed or variable, or the method for determining the rate and date interest will begin to accrue, that the Debt Securities will bear and the interest payment dates for the Debt Securities;


each place where payments on the Debt Securities will be payable;


any terms upon which the Debt Securities may be redeemed, in whole or in part, at our option;


any sinking fund or other provisions that would obligate us to redeem or otherwise repurchase the Debt Securities;


the portion of the principal amount, if less than all, of the Debt Securities that will be payable upon declaration of acceleration of the Maturity of the Debt Securities;


whether the Debt Securities are defeasible;


any addition to or change in the events of default;


whether the Debt Securities are convertible into shares of our Class A common stock and, if so, the terms and conditions upon which conversion will be effected, including the initial conversion price or conversion rate and any adjustments thereto and the conversion period;


any addition to or change in the covenants in the Indenture applicable to the Debt Securities;


any other specific terms, preferences, rights or limitations of, or restrictions on, the Debt Securities; and


any other terms of the Debt Securities not inconsistent with the provisions of the Indenture.

We may issue debt securities that provide for an amount less than their stated principal amount to be due and payable upon declaration of acceleration of their maturity pursuant to the terms of the indenture. We will provide you with information on the federal income tax considerations and other special considerations applicable to any of these debt securities in the applicable prospectus supplement.

Debt Securities, including any Debt Securities that provide for an amount less than the principal amount thereof to be due and payable upon a declaration of acceleration of the maturity thereof, or original issue discount securities (“Original Issue Discount Securities”), may be sold at a substantial discount below their principal amount. Special United States federal income tax considerations applicable to Original Issue Discount Securities may be described in the applicable prospectus supplement. In addition, special United States federal income tax or other considerations applicable to any Debt Securities that are denominated in a currency or currency unit other than United States dollars may be described in the applicable prospectus supplement.

Conversion or Exchange Rights

We will set forth in the prospectus supplement the terms, if any, on which Debt Securities may be convertible into or exchangeable for shares of our Class A common stock or our other securities. We will include provisions as to whether conversion or exchange is mandatory, at the option of the holder or at our option. We may include provisions pursuant to which the number of shares of our Class A common stock or our other securities that the holders of the series of Debt Securities receive would be subject to adjustment.

Consolidation, Merger or Sale; No Protection in Event of a Change of Control or Highly Leveraged Transaction

The Indentures do not contain any covenant that restricts our ability to merge or consolidate, or sell, convey, transfer or otherwise dispose of all or substantially all of our assets. However, any successor to or acquirer of such assets must assume all of our obligations under the Indentures or the Debt Securities, as appropriate, satisfactory in form to the debenture trustee.

Unless we state otherwise in the applicable prospectus supplement, the Debt Securities will not contain any provisions that may afford holders of the Debt Securities protection in the event we have a change of control or in the event of a highly leveraged transaction (whether or not such transaction results in a change of control), which could adversely affect holders of Debt Securities.

Events of Default Under the Indenture

The following are events of default under the Indentures with respect to any series of Debt Securities that we may issue:


if we fail to pay interest when due and our failure continues for 90 days and the time for payment has not been extended or deferred;


if we fail to pay the principal, or premium, if any, when due and the time for payment has not been extended or delayed;


if we fail to observe or perform any other covenant set forth in the Debt Securities of such series or the applicable Indentures, other than a covenant specifically relating to and for the benefit of holders of another series of Debt Securities, and our failure continues for 90 days after we receive written notice from the debenture trustee or holders of not less than a majority in aggregate principal amount of the outstanding Debt Securities of the applicable series; and


if specified events of bankruptcy, insolvency or reorganization occur as to us.

No event of default with respect to a particular series of Debt Securities (except as to certain events of bankruptcy, insolvency or reorganization) necessarily constitutes an event of default with respect to any other series of Debt Securities. The occurrence of an event of default may constitute an event of default under any bank credit agreements we may have in existence from time to time. In addition, the occurrence of certain events of default or acceleration under any applicable Indenture may constitute an event of default under certain of our other indebtedness outstanding from time to time.

If an event of default with respect to Debt Securities of any series at the time outstanding occurs and is continuing, then the trustee or the holders of not less than a majority in principal amount of the outstanding Debt Securities of that series may, by a notice in writing to us (and to the debenture trustee if given by the holders), declare to be due and payable immediately the principal (or, if the Debt Securities of that series are discount securities, that portion of the principal amount as may be specified in the terms of that series) of and premium and accrued and unpaid interest, if any, on all Debt Securities of that series. Before a judgment or decree for payment of the money due has been obtained with respect to Debt Securities of any series, the holders of a majority in principal amount of the outstanding Debt Securities of that series (or, at a meeting of holders of such series at which a quorum is present, the holders of a majority in principal amount of the Debt Securities) default, other than the non-payment of accelerated principal, premium, if any, and interest, if any, with respect to Debt Securities of that series, have been cured or waived as provided in the applicable Indenture (including payments or deposits in respect of principal, premium or interest that had become due other than as a result of such acceleration). We refer you to the prospectus supplement relating to any series of Debt Securities that are discount securities for the particular provisions relating to acceleration of a portion of the principal amount of such discount securities upon the occurrence of an event of default.

Subject to the terms of the Indentures, if an event of default under an Indenture shall occur and be continuing, the debenture trustee will be under no obligation to exercise any of its rights or powers under such Indenture at the request or direction of any of the holders of the applicable series of debt securities, unless such holders have offered the debenture trustee reasonable indemnity. The holders of a majority in principal amount of the outstanding Debt Securities of any series will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the debenture trustee, or exercising any trust or power conferred on the debenture trustee, with respect to the Debt Securities of that series, provided that:


the direction so given by the holder is not in conflict with any law or the applicable Indenture; and


subject to its duties under the Trust Indenture Act, the debenture trustee need not take any action that might involve it in personal liability or might be unduly prejudicial to the holders not involved in the proceeding.


A holder of the Debt Securities of any series will only have the right to institute a proceeding under the Indentures or to appoint a receiver or trustee, or to seek other remedies if:


the holder previously has given written notice to the debenture trustee of a continuing event of default with respect to that series;


the holders of at least a majority in aggregate principal amount of the outstanding Debt Securities of that series have made written request, and such holders have offered reasonable indemnity to the debenture trustee to institute the proceeding as trustee; and


the debenture trustee does not institute the proceeding, and does not receive from the holders of a majority in aggregate principal amount of the outstanding Debt Securities of that series (or at a meeting of holders of such series at which a quorum is present, the holders of a majority in principal amount of the Debt Securities of such series represented at such meeting) other conflicting directions within 60 days after the notice, request and offer.

These limitations do not apply to a suit instituted by a holder of Debt Securities if we default in the payment of the principal, premium, if any, or interest on, the Debt Securities. We will periodically file statements with the applicable debenture trustee regarding our compliance with specified covenants in the applicable Indenture.

Modification of Indenture; Waiver

The debenture trustee and we may change the applicable Indenture without the consent of any holders with respect to specific matters, including:


to fix any ambiguity, defect or inconsistency in the Indenture; and


to change anything that does not materially adversely affect the interests of any holder of Debt Securities of any series issued pursuant to such Indenture.

In addition, under the Indentures, the rights of holders of a series of Debt Securities may be changed by us and the debenture trustee with the written consent of the holders of at least a majority in aggregate principal amount of the outstanding Debt Securities of each series (or, at a meeting of holders of such series at which a quorum is present, the holders of a majority in principal amount of the Debt Securities of such series represented at such meeting) that is affected. However, the debenture trustee and we may make the following changes only with the consent of each holder of any outstanding Debt Securities affected:


extending the fixed maturity of the series of debt securities;


reducing the principal amount, reducing the rate of or extending the time of payment of interest, or any premium payable upon the redemption of any debt securities;


reducing the principal amount of discount securities payable upon acceleration of maturity;


making the principal of or premium or interest on any debt security payable in currency other than that stated in the debt security; or


reducing the percentage of debt securities, the holders of which are required to consent to any amendment or waiver.

Except for certain specified provisions, the holders of at least a majority in principal amount of the outstanding Debt Securities of any series (or, at a meeting of holders of such series at which a quorum is present, the holders of a majority in principal amount of the Debt Securities of such series represented at such meeting) may on behalf of the holders of all Debt Securities of that series waive our compliance with provisions of the Indenture. The holders of a majority in principal amount of the outstanding Debt Securities of any series may on behalf of the holders of all the Debt Securities of such series waive any past default under the Indenture with respect to that series and its consequences, except a default in the payment of the principal of, premium or any interest on any debt security of that series or in respect of a covenant or provision, which cannot be modified or amended without the consent of the holder of each outstanding debt security of the series affected; provided, however, that the holders of a majority in principal amount of the outstanding Debt Securities of any series may rescind an acceleration and its consequences, including any related payment default that resulted from the acceleration.

Discharge

Each Indenture provides that we can elect to be discharged from our obligations with respect to one or more series of debt securities, except for obligations to:


register the transfer or exchange of Debt Securities of the series;


replace stolen, lost or mutilated Debt Securities of the series;


duly and punctually pay or cause to be paid amounts owing with respect to the Debt Securities;


maintain paying agencies;


hold monies for payment in trust;


compensate and indemnify the trustee; and


appoint any successor trustee.

In order to exercise our rights to be discharged with respect to a series, we must deposit with the trustee money or government obligations sufficient to pay all the principal of, the premium, if any, and interest on, the Debt Securities of the series on the dates payments are due.

Form, Exchange, and Transfer

We will issue the Debt Securities of each series only in fully registered form without coupons and, unless we otherwise specify in the applicable prospectus supplement, in denominations of $1,000 and any integral multiple thereof. The Indentures provide that we may issue Debt Securities of a series in temporary or permanent global form and as book-entry securities that will be deposited with, or on behalf of, The Depository Trust Company or another depositary named by us and identified in a prospectus supplement with respect to that series.

At the option of the holder, subject to the terms of the Indentures and the limitations applicable to global securities described in the applicable prospectus supplement, the holder of the Debt Securities of any series can exchange the Debt Securities for other Debt Securities of the same series, in any authorized denomination and of like tenor and aggregate principal amount.

Subject to the terms of the Indentures and the limitations applicable to global securities set forth in the applicable prospectus supplement, holders of the Debt Securities may present the Debt Securities for exchange or for registration of transfer, duly endorsed or with the form of transfer endorsed thereon duly executed if so required by us or the security registrar, at the office of the security registrar or at the office of any transfer agent designated by us for this purpose. Unless otherwise provided in the Debt Securities that the holder presents for transfer or exchange or in the applicable Indenture, we will make no service charge for any registration of transfer or exchange, but we may require payment of any taxes or other governmental charges.

We will name in the applicable prospectus supplement the security registrar, and any transfer agent in addition to the security registrar, that we initially designate for any debt securities. We may at any time designate additional transfer agents or rescind the designation of any transfer agent or approve a change in the office through which any transfer agent acts, except that we will be required to maintain a transfer agent in each place of payment for the Debt Securities of each series.

If we elect to redeem the Debt Securities of any series, we will not be required to:


issue, register the transfer of, or exchange any Debt Securities of that series during a period beginning at the opening of 15 business days before the day of mailing of a notice of redemption of any Debt Securities that may be selected for redemption and ending at the close of business on the day of the mailing; or


register the transfer of or exchange any Debt Securities so selected for redemption, in whole or in part, except the unredeemed portion of any Debt Securities we are redeeming in part.

Information Concerning the Debenture Trustee

The debenture trustee, other than during the occurrence and continuance of an event of default under the applicable Indenture, undertakes to perform only those duties as are specifically set forth in the applicable Indenture.

Upon an event of default under an Indenture, the debenture trustee under such Indenture must use the same degree of care as a prudent person would exercise or use in the conduct of his or her own affairs. Subject to this provision, the debenture trustee is under no obligation to exercise any of the powers given it by the Indentures at the request of any holder of Debt Securities unless it is offered reasonable security and indemnity against the costs, expenses and liabilities that it might incur.

Payment and Paying Agents

Unless we otherwise indicate in the applicable prospectus supplement, we will make payment of the interest on any Debt Securities on any interest payment date to the person in whose name the debt securities, or one or more predecessor securities, are registered at the close of business on the regular record date for the interest.

We will pay principal of and any premium and interest on the Debt Securities of a particular series at the office of the paying agents designated by us, except that unless we otherwise indicate in the applicable prospectus supplement, will we make interest payments by check which we will mail to the holder. Unless we otherwise indicate in a prospectus supplement, we will designate the corporate trust office of the debenture trustee in the City of New York as our sole paying agent for payments with respect to Debt Securities of each series. We will name in the applicable prospectus supplement any other paying agents that we initially designate for the Debt Securities of a particular series. We will maintain a paying agent in each place of payment for the Debt Securities of a particular series.

All money we pay to a paying agent or the debenture trustee for the payment of the principal of or any premium or interest on any Debt Securities which remains unclaimed at the end of two years after such principal, premium or interest has become due and payable will be repaid to us, and the holder of the security thereafter may look only to us for payment thereof.

Governing Law

The Indentures and the Debt Securities will be governed by and construed in accordance with the laws of the State of New York, except to the extent that the Trust Indenture Act is applicable.

Subordination of Subordinated Debt Securities

Our obligations pursuant to any subordinated Debt Securities will be subordinate and junior in priority of payment to certain of our other indebtedness to the extent described in a prospectus supplement. The Indentures do not limit the amount of indebtedness we may incur. The Indentures also do not limit us from issuing any other secured or unsecured debt.

DESCRIPTION OF WARRANTS

General

We may issue warrants to purchase shares of our Class A common stock, shares of our preferred stock and/or Debt Securities in one or more series together with other securities or separately, as described in the applicable prospectus supplement. Below is a description of certain general terms and provisions of the warrants that we may offer. Particular terms of the warrants will be described in the warrant agreements and the prospectus supplement relating to the warrants.

The applicable prospectus supplement will contain, where applicable, the following terms of and other information relating to the warrants:


the specific designation and aggregate number of, and the price at which we will issue, the warrants;


the currency or currency units in which the offering price, if any, and the exercise price are payable;


the designation, amount and terms of the securities purchasable upon exercise of the warrants;


if applicable, the exercise price for shares of our Class A common stock and the number of shares of our Class A common stock to be received upon exercise of the warrants;


if applicable, the exercise price for our shares of our preferred stock, the number of shares of preferred stock to be received upon exercise, and a description of that series of our preferred stock;


if applicable, the exercise price for our Debt Securities, the amount of Debt Securities to be received upon exercise, and a description of that series of Debt Securities;


the date on which the right to exercise the warrants will begin and the date on which that right will expire or, if you may not continuously exercise the warrants throughout that period, the specific date or dates on which you may exercise the warrants;


whether the warrants will be issued in fully registered form or bearer form, in definitive or global form or in any combination of these forms, although, in any case, the form of a warrant included in a unit will correspond to the form of the unit and of any security included in that unit;


any applicable material U.S. federal income tax consequences;


the identity of the warrant agent for the warrants and of any other depositaries, execution or paying agents, transfer agents, registrars or other agents;


the proposed listing, if any, of the warrants or any securities purchasable upon exercise of the warrants on any securities exchange;


if applicable, the date from and after which the warrants and shares of Class A common stock, shares of preferred stock and/or Debt Securities will be separately transferable;


if applicable, the minimum or maximum amount of the warrants that may be exercised at any one time;


information with respect to book-entry procedures, if any;


the anti-dilution provisions of the warrants, if any;


any redemption or call provisions;


whether the warrants may be sold separately or with other securities as parts of units; and


any additional terms of the warrants, including terms, procedures and limitations relating to the exchange and exercise of the warrants.

Transfer Agent and Registrar

The transfer agent and registrar for any warrants will be set forth in the applicable prospectus supplement.

DESCRIPTION OF RIGHTS

General

We may issue rights to our stockholders to purchase shares of our Class A common stock, shares of our preferred stock or any of the other securities described in this prospectus. We may offer rights separately or together with one or more additional rights, Debt Securities, shares of preferred stock, shares of Class A common stock or warrants, or any combination of those securities in the form of units, as described in the applicable prospectus supplement. Each series of rights will be issued under a separate rights agreement to be entered into between us and a bank or trust company, as rights agent. The rights agent will act solely as our agent in connection with the certificates relating to the rights of the series of certificates and will not assume any obligation or relationship of agency or trust for or with any holders of rights certificates or beneficial owners of rights. The following description sets forth certain general terms and provisions of the rights to which any prospectus supplement may relate. The particular terms of the rights to which any prospectus supplement may relate and the extent, if any, to which the general provisions may apply to the rights so offered will be described in the applicable prospectus supplement. To the extent that any particular terms of the rights, rights agreement or rights certificates described in a prospectus supplement differ from any of the terms described below, then the terms described below will be deemed to have been superseded by that prospectus supplement. We encourage you to read the applicable rights agreement and rights certificate for additional information before you decide whether to purchase any of our rights.

We will provide in a prospectus supplement the following terms of the rights being issued:


the date of determining the stockholders entitled to the rights distribution;


the aggregate number of shares of Class A common stock, shares of preferred stock or other securities purchasable upon exercise of the rights;


the exercise price;


the aggregate number of rights issued;


whether the rights are transferrable and the date, if any, on and after which the rights may be separately transferred;


the date on which the right to exercise the rights will commence, and the date on which the right to exercise the rights will expire;


the method by which holders of rights will be entitled to exercise;


the conditions to the completion of the offering, if any;


the withdrawal, termination and cancellation rights, if any;


whether there are any backstop or standby purchaser or purchasers and the terms of their commitment, if any;


whether stockholders are entitled to oversubscription rights, if any;


any applicable material U.S. federal income tax considerations; and


any other terms of the rights, including terms, procedures and limitations relating to the distribution, exchange and exercise of the rights, as applicable.

Each right will entitle the holder of rights to purchase for cash the principal amount of shares of Class A common stock, shares of preferred stock or other securities at the exercise price provided in the applicable prospectus supplement. Rights may be exercised at any time up to the close of business on the expiration date for the rights provided in the applicable prospectus supplement.

Holders may exercise rights as described in the applicable prospectus supplement. Upon receipt of payment and the rights certificate properly completed and duly executed at the corporate trust office of the rights agent or any other office indicated in the prospectus supplement, we will, as soon as practicable, forward the shares of Class A common stock, shares of preferred stock or other securities, as applicable, purchasable upon exercise of the rights. If less than all of the rights issued in any rights offering are exercised, we may offer any unsubscribed securities directly to persons other than stockholders, to or through agents, underwriters or dealers or through a combination of such methods, including pursuant to standby arrangements, as described in the applicable prospectus supplement.

Rights Agent

The rights agent for any rights we offer will be set forth in the applicable prospectus supplement.

DESCRIPTION OF UNITS

The following description, together with the additional information that we include in any applicable prospectus supplements summarizes the material terms and provisions of the units that we may offer under this prospectus. While the terms we have summarized below will apply generally to any units that we may offer under this prospectus, we will describe the particular terms of any series of units in more detail in the applicable prospectus supplement. The terms of any units offered under a prospectus supplement may differ from the terms described below.

We will incorporate by reference from reports that we file with the SEC, the form of unit agreement that describes the terms of the series of units we are offering, and any supplemental agreements, before the issuance of the related series of units. The following summaries of material terms and provisions of the units are subject to, and qualified in their entirety by reference to, all the provisions of the unit agreement and any supplemental agreements applicable to a particular series of units. We urge you to read the applicable prospectus supplements related to the particular series of units that we may offer under this prospectus, as well as any related free writing prospectuses and the complete unit agreement and any supplemental agreements that contain the terms of the units.

General

We may issue units consisting of shares of our Class A common stock, shares of our preferred stock, one or more Debt Securities, warrants or rights for the purchase of shares of Class A common stock, shares of preferred stock and/or Debt Securities in one or more series, in any combination. Each unit will be issued so that the holder of the unit is also the holder of each security included in the unit. Thus, the holder of a unit will have the rights and obligations of a holder of each security included in the unit. The unit agreement under which a unit is issued may provide that the securities included in the unit may not be held or transferred separately, at any time or at any time before a specified date.

We will describe in the applicable prospectus supplement the terms of the series of units being offered, including:


the designation and terms of the units and of the securities comprising the units, including whether and under what circumstances those securities may be held or transferred separately;


any provisions of the governing unit agreement that differ from those described below; and


any provisions for the issuance, payment, settlement, transfer or exchange of the units or of the securities comprising the units.

The provisions described in this section, as well as those set forth in any prospectus supplement or as described under “Description of Capital Stock,” “Description of Debt Securities,” “Description of Warrants” and “Description of Rights” will apply to each unit, as applicable, and to any shares of Class A common stock, shares of preferred stock, debt security, warrant, or right included in each unit, as applicable.

Unit Agent

The name and address of the unit agent for any units we offer will be set forth in the applicable prospectus supplement.

Issuance in Series

We may issue units in such amounts and in such numerous distinct series as we determine.

Enforceability of Rights by Holders of Units

Each unit agent will act solely as our agent under the applicable unit agreement and will not assume any obligation or relationship of agency or trust with any holder of any unit. A single bank or trust company may act as unit agent for more than one series of units. A unit agent will have no duty or responsibility in case of any default by us under the applicable unit agreement or unit, including any duty or responsibility to initiate any proceedings at law or otherwise, or to make any demand upon us. Any holder of a unit may, without the consent of the related unit agent or the holder of any other unit, enforce by appropriate legal action its rights as holder under any security included in the unit.

CERTAIN MATERIAL U.S. FEDERAL INCOME TAX CONSIDERATIONS

The applicable prospectus supplement will describe certain U.S. federal income tax consequences of the acquisition, ownership and disposition of any securities offered thereunder by an initial investor who is a U.S. person (within the meaning of the U.S. Internal Revenue Code of 1986, as amended).

LEGAL MATTERS

Unless the applicable prospectus supplement indicates otherwise, the validity of securities offered hereby will be passed upon for us by Akin Gump Strauss Hauer & Feld LLP. Additional legal matters may be passed upon for any underwriters, dealers or agents by counsel that we will name in the applicable prospectus supplement.

EXPERTS

Ernst & Young LLP, independent registered public accounting firm, has audited our consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2024, as set forth in their report, which is incorporated by reference in this prospectus and elsewhere in the registration statement. Our financial statements are incorporated by reference in reliance on Ernst & Young LLP's report, given on their authority as experts in accounting and auditing.

WHERE YOU CAN FIND MORE INFORMATION

We are subject to the reporting requirements of the Exchange Act and file annual, quarterly and current reports, proxy statements and other information with the SEC. SEC filings are available at the SEC’s web site at http://www.sec.gov.

This prospectus is only part of a registration statement on Form S-3 that we have filed with the SEC under the Securities Act and therefore omits certain information contained in the registration statement. We have also filed exhibits and schedules with the registration statement that are excluded from this prospectus, and you should refer to the applicable exhibit or schedule for a complete description of any statement referring to any contract or other document.

We also maintain a website at www.prokidney.com, through which you can access our SEC filings. The information set forth on our website is not part of this prospectus.

INCORPORATION OF DOCUMENTS BY REFERENCE

The SEC allows us to “incorporate by reference” information into this prospectus, which means that we can disclose important information to you by referring you to another document filed separately with the SEC. The information incorporated by reference is deemed to be part of this prospectus, and subsequent information that we file later with the SEC will automatically update and supersede this information. We filed a registration statement on Form S-3 under the Securities Act with the SEC with respect to the securities we may offer pursuant to this prospectus. This prospectus omits certain information contained in the registration statement, as permitted by the SEC. You should refer to the registration statement, including the exhibits, for further information about us and the securities we may offer pursuant to this prospectus. Statements in this prospectus regarding the provisions of certain documents filed with, or incorporated by reference in, the registration statement are not necessarily complete and each statement is qualified in all respects by that reference. Copies of all or any part of the registration statement, including the documents incorporated by reference or the exhibits, may be obtained from the SEC’s website at http://www.sec.gov. The documents we are incorporating by reference are:

(a)  our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, as filed with the SEC on March 17, 2025;

(b)  our Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2025, as filed with the SEC on May 12, 2025;

(c)  our Current Reports on Form 8-K, as filed with the SEC on January 21, 2025, May 30, 2025, and July 1, 2025;

(d)  our Current Report on Form 8-K12B, as filed with the SEC on July 3, 2025;

(e)  our Definitive Proxy Statement, included in the Final Prospectus, for the Annual General Meeting of Shareholders on May 29, 2025 and as filed with the SEC on April 28, 2025; and

(f) the description of our common stock, included in the Final Prospectus, as filed with the SEC on April 28, 2025 under the caption “Description of Securities” therein, including any amendment or report filed for the purpose of updating such description.

All documents filed by us pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this prospectus and any accompanying prospectus supplement and before the termination of the offering shall also be deemed to be incorporated herein by reference. The most recent information that we file with the SEC automatically updates and supersedes older information. The information contained in any such filing will be deemed to be a part of this prospectus, commencing on the date on which the document is filed.

We are not, however, incorporating by reference any documents or portions thereof, whether specifically listed above or filed in the future, that are not deemed “filed” with the SEC, including our compensation committee report, performance graph and the certifications of our chief executive officer and chief financial officer required by Rule 13a-14(b) or Rule 15d-14(b) under the Exchange Act and Section 1350 of Chapter 63 of Title 18 of the United States Code (included in or accompanying our latest Annual Report on Form 10-K incorporated by reference herein) or any information furnished pursuant to Items 2.02 or 7.01 of Form 8-K or certain exhibits furnished pursuant to Item 9.01 of Form 8-K.

We will provide without charge upon written or oral request to each person, including any beneficial owner, to whom a prospectus is delivered, a copy of any or all of the documents which are incorporated by reference into the prospectus but not delivered with the prospectus (other than exhibits to those documents unless such exhibits are specifically incorporated by reference as an exhibit in this prospectus). Requests should be directed to:

ProKidney Corp.
c/o 2000 Frontis Plaza Blvd, Suite 250
Winston-Salem, NC 27103
Attn: Todd Girolamo
Telephone: (336) 999-7028

You may also access these documents on our website, http://www.prokidney.com. The information contained on, or that can be accessed through, our website is not a part of this prospectus. We have included our website address in this prospectus solely as an inactive textual reference.

You should rely only on information contained in, or incorporated by reference into, this prospectus. We have not authorized anyone to provide you with information different from that contained in this prospectus or incorporated by reference in this prospectus. We are not making offers to sell the securities in any jurisdiction in which such an offer or solicitation is not authorized or in which the person making such offer or solicitation is not qualified to do so or to anyone to whom it is unlawful to make such offer or solicitation.

ProKidney Corp.

Class A Common Stock
Preferred Stock
Debt Securities
Warrants
Rights
Units

$500,000,000


PROSPECTUS


       , 2025



PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14.
Other Expenses of Issuance and Distribution

The following expenses incurred in connection with the sale of the securities being registered will be borne by the registrant. Other than the SEC registration fee and the FINRA filing fee, the amounts stated are estimates.

SEC Registration Fee
 
$
73,800
(1) 
FINRA filing fee
 
$
*
 
Legal Fees and Expenses
 
$
*
 
Accounting Fees and Expenses
 
$
*
 
Miscellaneous
 
$
*
 
Total
 
$
*
 

(1) SEC registration fee of $73,800 was paid upon the initial filing of the Registration Statement.
*These fees are calculated based on the securities offered and the number of issuances and accordingly cannot be defined at this time.

Item 15.
Indemnification of Directors and Officers

Section 102(b)(7) of the DGCL allows a corporation to provide in its certificate of incorporation that a director or officer of the corporation will not be personally liable to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a director or officer, except (1) for any breach of the director’s or officer’s duty of loyalty to the corporation or its stockholders, (2) for acts or omissions by a director or officer not in good faith or which involve intentional misconduct or a knowing violation of law, (3) for payments of unlawful dividends or unlawful stock repurchases or redemptions made under a director’s administration , (4) for any transaction from which the director or officer derived an improper personal benefit or (5) an officer in any action by or in the right of the corporation.

Section 145(a) of the DGCL provides, in general, that a corporation may indemnify any person who was or is a party to or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation), because he or she is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by the person in connection with such action, suit or proceeding, if he or she acted in good faith and in a manner he or she reasonably believed to be in or not opposed to the best interests of the corporation and, with respect to any criminal action or proceeding, had no reasonable cause to believe his or her conduct was unlawful.

Section 145(b) of the DGCL provides, in general, that a corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a judgment in its favor because the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys’ fees) actually and reasonably incurred by the person in connection with the defense or settlement of such action or suit if he or she acted in good faith and in a manner he or she reasonably believed to be in or not opposed to the best interests of the corporation, except that no indemnification will be made with respect to any claim, issue or matter as to which he or she will have been adjudged to be liable to the corporation unless and only to the extent that the Court of Chancery or other adjudicating court determines that, despite the adjudication of liability but in view of all of the circumstances of the case, he or she is fairly and reasonably entitled to indemnity for such expenses that the Court of Chancery or other adjudicating court will deem proper.

Section 145(g) of the DGCL provides, in general, that a corporation may purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against any liability asserted against such person and incurred by such person in any such capacity, or arising out of his or her status as such, whether or not the corporation would have the power to indemnify the person against such liability under Section 145 of the DGCL.

Our certificate of incorporation provides that no director or officer shall be personally liable to the Company or its stockholders for monetary damages for breach of fiduciary duty as a director or officer except to the extent that such exemption from liability or limitation thereof is not permitted under the DGCL as currently in effect or as the same may be amended. This provision in the certificate of incorporation does not eliminate the directors’ or officers’ fiduciary duties and, in appropriate circumstances, equitable remedies such as injunctive or other forms of non-monetary relief will remain available under Delaware law. In addition, such provision does not eliminate or limit the liability of (1) a director or officer for any breach of the director’s or officer’s duty of loyalty to the Company or its stockholders, (2) a director or officer for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (3) a director under Section 174 of the DGCL, (4) a director or officer for any transaction from which the director or officer derived an improper personal benefit, or (5) an officer in any action by or in the right of the Company. The provision also does not affect a director’s or officer’s responsibilities under any other law, such as the federal securities laws or state or federal environmental laws.

The Company’s by-laws also provide that the Company shall indemnify its directors and officers to the fullest extent not prohibited by law, except that the Company shall not be required to indemnify any director or officer in connection with any proceeding (or part thereof) initiated by such person unless (1) such indemnification is expressly required by law, (2) the proceeding was authorized by the board of directors of the Company, (3) such indemnification is provided by the Company, in its sole discretion, pursuant to the powers vested in the Company under the DGCL or any other applicable law or (4) such indemnification is otherwise required to be made pursuant to the by-laws. For purposes of the indemnification described in this paragraph, references to the Company include ProKidney Cayman prior to the domestication and continuation of its existence under Delaware law as ProKidney Corp. The Company will remain obligated on any indemnification obligations of ProKidney Cayman arising prior to the Domestication.

We maintain directors’ and officers’ insurance policies that cover our directors and officers.

Subject to limitations imposed by Delaware law and the terms therein, the Company has entered into agreements that provide indemnification and advancement of expenses to the directors, officers, certain employees and certain agents of the Company and certain other persons who are or were serving at our request as a director, officer, employee or agent of any other enterprise for all actions, liabilities, losses, damages or expenses incurred or suffered by the indemnified person arising out of such person’s service in such capacity.

Item 16.
Exhibits

The exhibits to this registration statement are listed in the Exhibit Index immediately prior the signature page hereto, which Exhibit Index is hereby incorporated by reference into this Item 16 by reference.

Item 17.
Undertakings

The undersigned registrant hereby undertakes:


(a)(1)
To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:


(i)
To include any prospectus required by Section 10(a)(3) of the Securities Act of 1933, as amended (“Securities Act”);


(ii)
To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Securities and Exchange Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20 percent change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective registration statement; and


(iii)
To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement; provided, however, that paragraphs (a)(1)(i), (a)(1)(ii) and (a)(1)(iii) of this section do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Securities and Exchange Commission by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934, as amended (“Exchange Act”), that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement;


(2)
That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof;


(3)
To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering;


(4)
That, for the purpose of determining liability under the Securities Act to any purchaser:


(i)
Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and


(ii)
Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii), or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof; provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date;


(5)
That, for the purpose of determining liability of the registrant under the Securities Act of 1933 to any purchaser in the initial distribution of the securities, the undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:


(i)
Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;


(ii)
Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;


(iii)
The portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and


(iv)
Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser;


(6)
That, for purposes of determining any liability under the Securities Act, each filing of the registrant’s annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof;


(7)
Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue;


(8)
That, for purposes of determining any liability under the Securities Act of 1933, the information omitted from the form of prospectus filed as part of this registration statement in reliance upon Rule 430A and contained in a form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the Securities Act of 1933 shall be deemed to be part of this registration statement as of the time it was declared effective;


(9)
That, for the purpose of determining any liability under the Securities Act of 1933, each post-effective amendment that contains a form of prospectus shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof; and


(10)
To file an application for the purpose of determining the eligibility of the trustee to act under subsection (a) of Section 310 of the Trust Indenture Act of 1939 in accordance with the rules and regulations prescribed by the Securities and Exchange Commission under Section 305(b)(2) of the Trust Indenture Act of 1939.

EXHIBIT INDEX

Exhibit
Number
Item
1.1**
Form of Underwriting Agreement.
   
2.1†
Business Combination Agreement, dated as of January 18, 2022, by and between ProKidney Corp. (formerly known as Social Capital Suvretta Holdings Corp. III) and ProKidney LP. (incorporated by reference to Exhibit 2.1 of the Company’s Current Report on Form 8-K filed on January 21, 2022 (File No. 001-40560)).
   
3.1
Certificate of Incorporation of ProKidney Corp. (incorporated by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K12B, filed on July 3, 2025 (File No. 001-40560)).
   
3.2
By-laws of ProKidney Corp. (incorporated by reference to Exhibit 3.2 of the Company’s Current Report on Form 8-K12B, filed on July 3, 2025 (File No. 001-40560)).
   
4.1
Form of Stock Certificate for Class A Common Stock (incorporated by reference to Exhibit 4.1 of the Company’s Current Report on Form 8-K12B, filed on July 3, 2025 (File No. 001-40560)).
   
4.2
Form of Stock Certificate for Class B Common Stock (incorporated by reference to Exhibit 4.2 of the Company’s Current Report on Form 8-K12B, filed on July 3, 2025 (File No. 001-40560)).
   
Form of indenture for senior debt securities and the related form of senior debt security.
   
Form of indenture of subordinated debt securities and related form of subordinated debt security.
   
4.5**
Form of Warrant Agreement and Warrant Certificate.
   
4.6**
Form of Rights Agreement and Rights Certificate.
   
4.7**
Form of Unit Agreement and Unit Certificate.
   
Opinion of Akin Gump Strauss Hauer & Feld LLP.
   
Subsidiaries of ProKidney Corp.
   
Consent of Ernst & Young LLP.
   
Consent of Akin Gump Strauss Hauer & Feld LLP (included in Exhibit 5.1 hereto).
   
Power of Attorney (included on signature page to the initial filing of the Registration Statement).
   
25.1***
Form T-1 Statement of Eligibility of Trustee for Senior Indenture under the Trust Indenture Act of 1939.
   
25.2***
Form T-1 Statement of Eligibility of Trustee for Subordinated Indenture under the Trust Indenture Act of 1939.
   
107
Calculation of Filing Fee Table (incorporated by reference to Exhibit 107 of the Company’s Registration Statement on Form S-3, filed on November 22, 2023 (File No. 333-275701)).

*
Filed herewith.

**
To be subsequently filed, if applicable, by an amendment to this registration statement or by a current report on Form 8-K.

***
To be filed in accordance with the requirements of Section 305(b)(2) of the Trust Indenture Act of 1939, as amended, and the applicable rules thereunder.

The annexes, schedules, and certain exhibits to this Exhibit have been omitted pursuant to Item 601(a)(5).

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the Registrant has duly caused this Post-Effective Amendment No. 1 to the Registration Statements to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Winston-Salem, State of North Carolina, on the 3rd day of July, 2025.

 
PROKIDNEY CORP.
   
 
/s/ Bruce Culleton, M.D.
 
 
Bruce Culleton, M.D.
 
Chief Executive Officer

POWER OF ATTORNEY

Each person whose signature appears below constitutes and appoints each of Bruce Culleton, M.D. and James Coulston, acting alone or together with another attorney-in-fact, as his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for such person and in his or her name, place and stead, in any and all capacities, to sign any or all further amendments (including post-effective amendments) to this registration statement, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.
 
Pursuant to the requirements of the Securities Act, this Post-Effective Amendment No. 1 to the Registration Statement has been signed by the following persons in the capacities indicated.

Name
 
Title
 
Date
         
/s/ Bruce Culleton, M.D.
 
Chief Executive Officer and Director
 
July 3, 2025
Bruce Culleton, M.D.
 
(Principal Executive Officer)
   
         
/s/ James Coulston
 
 Chief Financial Officer
 
July 3, 2025
James Coulston
 
(Principal Financial and Accounting Officer)
   
         
/s/ Pablo Legorreta
 
 Chairman
 
July 3, 2025
Pablo Legorreta
       
         
/s/ William F. Doyle
 
Director
 
July 3, 2025
William F. Doyle
       
         
/s/ Jennifer Fox
 
Director
 
July 3, 2025
Jennifer Fox
       
         
/s/ José Ignacio Jimenez Santos
 
Director
 
July 3, 2025
José Ignacio Jimenez Santos
       
         
/s/ Alan M. Lotvin, M.D.
 
Director
 
July 3, 2025
Alan M. Lotvin, M.D.
       
         
/s/ Brian J.G. Pereira, M.D.
 
Director
 
July 3, 2025
Brian J.G. Pereira, M.D.
       
         
/s/ Uma Sinha, Ph.D.
 
Director
 
July 3, 2025
Uma Sinha, Ph.D.
       


40