ProKidney Reports Fourth Quarter Financial Results and Recent Corporate Highlights

WINSTON-SALEM, N.C. – March 28, 2023 – ProKidney Corp. (Nasdaq: PROK) (“ProKidney” or the “Company”), a leading late clinical-stage cellular therapeutics company focused on chronic kidney disease (CKD), today announced financial results for the fourth quarter ended December 31, 2022, and provided an update on recent corporate developments.

“Throughout 2022, we made great progress in our mission to develop and provide a treatment with the potential to preserve kidney function in patients with late-stage CKD who are at high risk for kidney failure,” said Dr. Tim Bertram, Chief Executive Officer of ProKidney. “The first of two pivotal Phase 3 trials of REACT® is progressing with enrollment, as are several ongoing Phase 2 clinical studies, while the second Phase 3 trial continues to advance toward enrollment. Moreover, our accomplishments over the past year leave us well positioned to deliver on multiple potential value-creating milestones in 2023, including interim data from REGEN-007, our open-label Phase 2 study designed with contralateral kidney injections to provide visibility into potential outcomes of our global Phase 3 program. We remain actively engaged with the FDA, facilitated by REACT’s RMAT designation, to ensure that the steps we are taking today are positioning REACT for future success.

We continue to believe that our balance sheet, strengthened by the more than $500 million in net proceeds from our PIPE financing in July 2022, will be sufficient to fund operations through 2024 when we expect to report topline data from proact1 which, if positive, could help support a future BLA submission for potential U.S. regulatory approval.”

Dr. Joseph Stavas, SVP and Head of Global Clinical Development, Safety and Interventional Procedures, added, “We have meaningfully advanced the execution of our clinical development strategy, including regular interactions with the physician community at key medical congresses, aimed at broadening awareness of REACT among physicians. We look forward to advancing our REACT clinical trials, and to reporting additional data as it becomes available.”
 

Recent Corporate Highlights, and REACT® Clinical Development Updates

Fourth Quarter 2022 Financial Highlights

Cash Position: Cash and cash equivalents as of December 31, 2022, were $490.3 million, compared to $20.6 million on December 31, 2021. In connection with the closing of the business combination with Social Capital Suvretta Holding Corp. III (SCS) on July 11, 2022, ProKidney received gross proceeds of $596.5 million, including approximately $20 million held in SCS’s trust account with the remaining amount from PIPE investors. A portion of these proceeds was used to repay $35.2 million of related party notes, $49.4 million of expenses previously incurred by SCS and fees incurred in connection with the PIPE and business combination.

R&D Expenses: Research and development expenses were $20.9 million for the three months ended December 31, 2022, compared to $10.7 million for the same period in 2021. The increase of $10.2 million was driven by a $2.5 million increase in cash-based compensation costs, driven primarily by the hiring of additional members of the management team to strengthen our development and commercial expertise as we conduct a mid- and late-stage registrational development program. Costs related to our clinical trials for the three months ended December 31, 2022, increased by approximately $2.9 million as compared to the three months ended December 31, 2021, driven primarily by increased activities for our proact1 and proact2 trials. Further, non-cash costs of $3.3 million were recorded for equity-based compensation related to awards granted during 2022.

G&A Expenses: General and administrative expenses were $9.3 million for the three months ended December 31, 2022, compared to $3.0 million for the same period in 2021. The increase of $6.3 million was primarily driven by increases in non-cash equity-based compensation expenses of approximately $5.4 million due to additional awards granted during 2022, increases of approximately $1.1 million related to costs associated with operating as a public company, which consist primarily of director and officer insurance coverage, and professional service fees.

Net Loss Before Noncontrolling Interest: Net loss before noncontrolling interest was $24.6 million and $13.7 million for the three months ended December 31, 2022, and 2021, respectively.

About ProKidney

ProKidney, a pioneer in the treatment of CKD through innovations in cellular therapy, was founded in 2015 after a decade of research. ProKidney’s lead product candidate, REACT® (Renal Autologous Cell Therapy), is a first-of-its-kind, patented, autologous cellular therapy with the potential to preserve kidney function in patients at high-risk of kidney failure. Late-stage CKD patients, Stage 3b - 4, are a key target population for REACT therapy. REACT has received Regenerative Medicine Advanced Therapy (RMAT) designation, as well as FDA and EMA guidance, supporting its ongoing Phase 3 clinical program that launched in January 2022. For more information, visit www.prokidney.com.

About CKD

CKD is a serious diagnosis with significant morbidity and mortality. Notably, the 5-year mortality of newly diagnosed Stage 4 CKD is higher than that of newly diagnosed non-metastatic cancer. CKD most often presents as a progressive decline in kidney function, ultimately resulting in the failure of the kidneys and the need for renal replacement therapy, such as hemodialysis or kidney transplant. One in three Americans is at risk for CKD, which currently affects approximately 75 million people in the United States and Europe and over 400 million across Asia. CKD is among the largest single expense incurred by the U.S. health care system.

Forward-Looking Statements

This press release includes “forward-looking statements” within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995. ProKidney’s actual results may differ from its expectations, estimates and projections and consequently, you should not rely on these forward-looking statements as predictions of future events. Words such as “expect,” “estimate,” “project,” “budget,” “forecast,” “anticipate,” “intend,” “plan,” “may,” “will,” “could,” “should,” “believes,” “predicts,” “potential,” “continue,” and similar expressions (or the negative versions of such words or expressions) are intended to identify such forward-looking statements. These forward-looking statements include, without limitation, the Company’s expectations with respect to financial results and expected cash runway, future performance, development and commercialization of products, if approved, the potential benefits and impact of the Company’s products, if approved, potential regulatory approvals, the size and potential growth of current or future markets for the Company’s products, if approved, the advancement of the Company’s development programs into and through the clinic and the expected timing for reporting data, the making of regulatory filings or achieving other milestones related to related to the Company’s product candidates, and the advancement and funding of the Company’s developmental programs generally. Most of these factors are outside of the combined company’s control and are difficult to predict. Factors that may cause such differences include, but are not limited to: the inability to maintain the listing of the Company’s Class A ordinary shares on the Nasdaq; the inability to implement business plans, forecasts, and other expectations or identify and realize additional opportunities, which may be affected by, among other things, competition and the ability of the Company to grow and manage growth profitably and retain its key employees; the risk of

downturns and a changing regulatory landscape in the highly competitive biotechnology industry; the inability of the Company to raise financing in the future; the inability of the Company to obtain and maintain regulatory clearance or approval for its products, and any related restrictions and limitations of any cleared or approved product; the inability of the Company to identify, in-license or acquire additional technology; the inability of Company to compete with other companies currently marketing or engaged in the biologics market and in the area of treatment of kidney diseases; the size and growth potential of the markets for the Company’s products, if approved, and its ability to serve those markets, either alone or in partnership with others; the Company’s estimates regarding expenses, future revenue, capital requirements and needs for additional financing; the Company’s financial performance; the Company’s intellectual property rights; uncertainties inherent in cell therapy research and development, including the actual time it takes to initiate and complete clinical studies and the timing and content of decisions made by regulatory authorities; the fact that interim results from our clinical programs may not be indicative of future results; the impact of COVID-19 or geo-political conflict such as the war in Ukraine on the Company’s business; and other risks and uncertainties included under the heading “Risk Factors” in our Annual Report on Form 10-K and the Company’s other filings with the Securities and Exchange Commission. The Company cautions readers that the foregoing list of factors is not exclusive and cautions readers not to place undue reliance upon any forward-looking statements, which speak only as of the date made. The Company does not undertake or accept any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements to reflect any change in its expectations or any change in events, conditions or circumstances on which any such statement is based.

Contacts:

Corporate:

Glenn Schulman, PharmD, MPH

SVP, Investor Relations

glenn.schulman@prokidney.com

Investors:

Burns McClellan

Lee Roth

Lroth@burnsmc.com

Media:

Burns McClellan

Selina Husain / Robert Flamm, Ph.D.

Shusain@burnsmc.com / rflamm@burnsmc.com

ProKidney Corp. and Subsidiaries

Consolidated Balance Sheets

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ProKidney Corp. and Subsidiaries

Consolidated Statements of Operations and Comprehensive Loss

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(1) For the three months and year ended December 31, 2022, net loss per Class A ordinary share and weighted average Class A ordinary shares outstanding reflects the period from July 11, 2022 through December 31, 2022, the period following the Business Combination.

ProKidney Corp. and Subsidiaries

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