C3

Statistically significant 68% (p<0.0001) proteinuria reduction compared to placebo, with reduction observed as early as Week 4 All secondary endpoints favoured treatment with pegcetacoplan, including: - Stabilised eGFR, a key measure of kidney function - 71% of patients achieved zero C3c staining intensity, indicating clearance of C3c deposits Results consistent across subgroups including C3G and primary IC-MPGN, adolescent and adult patients, and native and post-transplant kidneys STOCKHOLM, Oct. 27, 2024 /PRNewswire/ -- Sobi® (STO: SOBI) and Apellis Pharmaceuticals, Inc. today announced that detailed data from the phase 3 VALIANT study were presented as an oral presentation during the High-Impact Clinical Trials session at the 2024 American Society of Nephrology (ASN) Kidney Week. The results highlighted the potential of systemic pegcetacoplan treatment in patients with C3 glomerulopathy (C3G) and primary immune complex membranoproliferative glomerulonephritis (IC-MPGN), which are rare, debilitating kidney diseases. "Pegcetacoplan is the only treatment to achieve substantial and clinically meaningful effects across all key markers of disease: proteinuria, eGFR stabilisation, and C3c staining," said Carla Nester, M.D. MSA, FASN, lead principal investigator for the VALIANT study, professor of internal medicine and paediatrics, and director of paediatric nephrology, University of Iowa Stead Family Children's Hospital. "C3G and primary IC-MPGN often affect patients as early as adolescence, often leading to either a kidney transplant or lifelong dialysis, so there is an urgent need for an approved treatment that can prolong kidney function." Statistically significant 68% proteinuria reduction across a broad study population, with reduction observed as early as Week 4 Pegcetacoplan-treated patients showed a statistically significant and clinically meaningful 68.1% (p<0.0001) proteinuria reduction (log-transformed ratio of urine protein-to-creatinine ratio) compared to placebo, both in addition to standard of care therapy, at Week 26. The proteinuria reduction was observed as early as Week 4 and continued through the six-month treatment period. Proteinuria reduction was consistent across broad patient subgroups including adolescent and adult patients, C3G and primary IC-MPGN patients, and patients with native and post-transplant kidneys. Pegcetacoplan stabilised eGFR and demonstrated substantial reduction in C3c staining Patients treated with pegcetacoplan achieved stabilisation of estimated glomerular filtration rate (eGFR), a key measure of kidney function, with a difference of +6.3 mL/min/1.73 m2 (95% CI 0.5, 12.1; nominal p value =0.03) over six months compared to placebo. Additionally, a substantial proportion of patients treated with pegcetacoplan also demonstrated a reduction in C3c staining intensity. Excessive C3c deposits are a key marker of disease activity which can lead to kidney inflammation, damage, and failure. 74.3% of patients in the pegcetacoplan group and 11.8% on placebo achieved a reduction in C3c staining intensity by two or more orders of magnitude from baseline, resulting in 27-fold higher odds ratio of achieving this reduction with pegcetacoplan (nominal p value <0.0001). 71.4% of pegcetacoplan-treated patients achieved zero C3c staining intensity, indicating clearance of C3c deposits. "C3G and primary IC-MPGN can have a severe impact on patients' lives, frequently resulting in kidney failure. The findings presented at ASN further highlight the potential of pegcetacoplan to preserve kidney function and address these unmet medical needs. We extend our heartfelt gratitude to the participants, their families, and the dedicated healthcare professionals who made this study possible," stated Lydia Abad-Franch, MD, Head of R&D, Medical Affairs, and Chief Medical Officer at Sobi. All secondary endpoints favoured treatment with pegcetacoplan In addition to the positive results on proteinuria, eGFR and C3c staining, pegcetacoplan demonstrated statistical significance on the key secondary endpoints of composite renal endpoint, which combines proteinuria reduction and eGFR stabilisation, and proteinuria reduction of at least 50% compared to baseline, as well as a numerical improvement in the C3G histologic index activity score. During the randomised, controlled 26-week treatment period, pegcetacoplan demonstrated favourable safety and tolerability, as well as a high compliance rate, consistent with its established profile. Rates of treatment-emergent adverse events (AEs) (84.1% in pegcetacoplan vs. 93.4% in placebo), serious AEs (9.5% vs. 9.8%), severe AEs (4.8 % vs. 6.6%), and AEs leading to study discontinuation (1.6% vs. 1.6%) were similar between the pegcetacoplan and placebo groups. There were no cases of meningococcal meningitis or serious infections attributed to encapsulated bacteria. Patients who complete the VALIANT study are eligible to enrol into the VALE long-term extension study. Sobi plans to submit a marketing application with the European Medicines Agency in 2025. Apellis plans to submit a supplemental new drug application to the U.S. Food and Drug Administration in early 2025. About the VALIANT study The VALIANT phase 3 study (NCT05067127) is a randomised, placebo-controlled, double-blinded, multi-centre study designed to evaluate pegcetacoplan efficacy and safety in 124 patients who are 12 years of age and older with C3G or primary IC-MPGN. It is the largest single trial conducted in these populations and the only study to include adolescent and adult patients, with native and post-transplant kidneys. Study participants were randomised to receive pegcetacoplan or placebo twice weekly for 26 weeks. Following this 26-week randomised controlled period, patients are able to proceed to a 26-week open-label phase in which all patients receive pegcetacoplan. The primary endpoint of the study was the log transformed ratio of urine protein-to-creatinine ratio (uPCR) at Week 26 compared to baseline. About C3 glomerulopathy (C3G) and primary immune-complex membranoproliferative glomerulonephritis (IC-MPGN) C3G and primary IC-MPGN are rare and debilitating kidney diseases that can lead to kidney failure. Excessive C3c deposits are a key marker of disease activity, which can lead to kidney inflammation, damage, and failure. There are no treatments that target the underlying cause of these diseases. Approximately 50% of people living with C3G and IC-MPGN suffer from kidney failure within five to 10 years of diagnosis, requiring a burdensome kidney transplant or lifelong dialysis.1 Additionally, 90% of patients who previously received a kidney transplant will experience disease recurrence.2 The diseases are estimated to affect 5,000 people in the United States and up to 8,000 in Europe.3 About pegcetacoplan in rare diseases Pegcetacoplan is a targeted C3 therapy designed to regulate excessive activation of the complement cascade, a part of the body's immune system, which can lead to the onset and progression of many serious diseases. Pegcetacoplan is under investigation for rare diseases across haematology and nephrology. Pegcetacoplan is approved for the treatment of paroxysmal nocturnal haemoglobinuria (PNH) as EMPAVELI®/Aspaveli® in the United States, European Union, and other countries globally. About the Sobi and Apellis collaboration Sobi and Apellis have global co-development rights for systemic pegcetacoplan. Sobi has exclusive ex-U.S. commercialisation rights for systemic pegcetacoplan, and Apellis has exclusive U.S. commercialisation rights for systemic pegcetacoplan and worldwide commercial rights for ophthalmological pegcetacoplan, including for geographic atrophy. About Sobi® Sobi® is a specialised international biopharmaceutical company transforming the lives of people with rare and debilitating diseases. Providing reliable access to innovative medicines in the areas of haematology, immunology, and specialty care, Sobi has approximately 1,800 employees across Europe, North America, the Middle East, Asia, and Australia. In 2023, revenue amounted to SEK 22.1 billion. Sobi's share (STO:SOBI) is listed on Nasdaq Stockholm. More about Sobi at sobi.com and LinkedIn. Contacts For details on how to contact the Sobi Investor Relations Team, please click here. For Sobi Media contacts, click here. This information was brought to you by Cision The following files are available for download: WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED

New APPEAR-C3G data show Fabhalta sustained proteinuria reduction at 12 months1 Upon Fabhalta initiation, improvement observed in estimated glomerular filtration rate (eGFR) slope – a key measure of kidney function – vs. patients' historic rapid decline1 Fabhalta also showed a favorable safety profile with no new safety signals1 Fabhalta is the only oral alternative complement pathway inhibitor to selectively target the underlying cause of C3G, an ultra-rare kidney disease with no approved treatments2-5 Novartis continues to advance multi-asset renal portfolio; C3G regulatory submissions completed in EU, China and Japan, and expected in US by year-end EAST HANOVER, N.J., Oct. 26, 2024 /PRNewswire/ -- Novartis today presented 12-month data from the Phase III APPEAR-C3G study at American Society of Nephrology (ASN) Kidney Week 2024 showing that patients with C3 glomerulopathy (C3G) treated with oral Fabhalta® (iptacopan) in addition to supportive care experienced clinically meaningful, sustained results at one year.1 These data confirm treatment with Fabhalta resulted in clinically meaningful proteinuria reduction, which was seen as early as 14 days, and sustained at 12 months. Similarly, in an open-label period of the study, proteinuria reduction was seen in participants who were switched to Fabhalta. In addition, improvement in estimated glomerular filtration rate (eGFR) slope was observed upon Fabhalta initiation compared to patients' historic rapid decline based on results from a prespecified exploratory analysis. Fabhalta showed a favorable safety profile, with no new safety signals.1 APPEAR-C3G evaluated the efficacy and safety of twice-daily oral Fabhalta in adult patients with C3G. The study was comprised of a 6-month randomized, double-blind treatment period with Fabhalta compared to placebo, followed by an additional 6-month open-label treatment period where all participants received Fabhalta.1 Results previously presented at the 2024 European Renal Association (ERA) Congress demonstrated a statistically significant and clinically meaningful 35.1% proteinuria reduction vs. placebo on top of supportive care at 6 months.6 Longer-term data show sustained results with oral Fabhalta "As a clinician treating young people living with C3G, I see firsthand the challenges with therapies used to treat this condition today, underscoring the vital need for dedicated treatment for these patients," said Carla Nester, M.D., M.S.A., F.A.S.N., Professor of Pediatrics-Nephrology at the University of Iowa and APPEAR-C3G Co-Investigator. "I am encouraged to see these data, which reinforce the clinically meaningful impact on kidney health measures we saw at 6 months. As the only oral complement inhibitor intended to treat C3G, Fabhalta could provide new hope for people living with this condition." "These results mark an important milestone for the management of C3G, as the first study to shed light on longer-term treatment targeting the underlying mechanism of this disease via the alternative complement pathway," said Andrew Bomback, M.D., M.P.H., Associate Professor of Medicine at Columbia University Irving Medical Center and APPEAR-C3G Co-Investigator and Steering Committee Member. "I am optimistic that these iptacopan APPEAR-C3G findings bring us a step closer to revolutionizing the treatment paradigm in this ultra-rare disease with no approved therapies." Approximately 50% of C3G patients progress to kidney failure within 10 years of diagnosis, at which point they require lifelong dialysis and/or kidney transplantation.4,7 Fabhalta, the only oral Factor B inhibitor of the alternative complement pathway, has potential to be the first US Food and Drug Administration (FDA) approved treatment for C3G.2,4,5 Regulatory submissions for Fabhalta in C3G are completed in the EU, China and Japan, and expected in US by year-end. Transforming patient care in kidney disease "We are thrilled to share these data, which demonstrate the potential of Fabhalta in C3G, and look forward to working with regulatory authorities with the goal of bringing this innovative medicine to this patient community," said David Soergel, M.D., Global Head, Cardiovascular, Renal and Metabolism Development Unit, Novartis. "Building on the longstanding experience of Novartis in nephrology and our first rare kidney disease approval in IgA nephropathy earlier this year, these results in C3G show continued advancement of our broad, industry-leading portfolio, which aims to transform care for these patients." Fabhalta, discovered at Novartis, received FDA approval in December 2023 for the treatment of adults with paroxysmal nocturnal hemoglobinuria (PNH) and accelerated approval in August 2024 for the reduction of proteinuria in certain adults with primary IgA nephropathy (IgAN).2 Fabhalta is being studied in a broad range of rare kidney diseases, including C3G, atypical hemolytic uremic syndrome (aHUS), immune complex membranoproliferative glomerulonephritis (IC-MPGN) and lupus nephritis (LN). Studies are ongoing to evaluate the safety and efficacy profiles in these investigational indications and support potential regulatory submissions. In addition to Fabhalta, Novartis is advancing the late-stage development of two additional IgAN therapies with highly differentiated mechanisms of action: atrasentan, an investigational oral endothelin A receptor antagonist that received FDA filing acceptance in Q2 2024, and zigakibart, an investigational subcutaneously administered anti-APRIL monoclonal antibody that is currently in Phase III development. A conference call to update investors on the Novartis renal portfolio will take place on Monday, October 28, 2024, at 8:00 am ET. Details can be found at Event calendar | Novartis. About APPEAR-C3G APPEAR-C3G (NCT04817618) is a Phase III multicenter, randomized, double-blind, parallel group, placebo-controlled study to evaluate the efficacy and safety of twice-daily oral Fabhalta (200 mg) in C3G patients. The study comprises a 6-month double-blind period in which adult patients were randomized 1:1 to receive Fabhalta or placebo on top of supportive care, followed by a 6-month open-label period in which all patients receive Fabhalta (including those who were previously on placebo). The primary endpoint for the double-blind period was proteinuria reduction from baseline at 6 months for Fabhalta compared to placebo as measured by 24-hour urine protein to creatinine ratio (UPCR).1,8 In addition to the results from adult patients with C3G, enrollment is ongoing in a separate cohort of adolescent patients with C3G.8 The majority of treatment-emergent adverse events (TEAEs) over the 12-month study period were mild to moderate in severity and there were no deaths, no cases of meningitis and/or meningococcal sepsis and no discontinuations due to TEAEs.1 About C3 glomerulopathy (C3G) C3G is an ultra-rare, progressive kidney disease that initially presents mostly in children and young adults.3,4,9 Each year, approximately 1-2 people per million worldwide are newly diagnosed with C3G, a form of membranoproliferative glomerulonephritis (MPGN).3 In C3G, overactivation of the alternative complement pathway – part of the immune system – causes deposits of C3 protein to build up in kidney glomeruli, which are a network of blood vessels that filter waste and remove extra fluids from the blood.9,10 This triggers inflammation and glomerular damage that results in proteinuria (protein in urine), hematuria (blood in urine) and reduced kidney function.9,11 Indication FABHALTA® (iptacopan) is a prescription medicine used to reduce protein in the urine (proteinuria) in adults with primary immunoglobulin A nephropathy (IgAN), who are at risk of their disease progressing quickly. It is not known if FABHALTA is safe and effective in children with IgAN. FABHALTA has been approved based on a reduction of proteinuria. Continued approval may require results from an ongoing study to determine whether FABHALTA slows decline in kidney function. Important Safety Information FABHALTA is a medicine that affects part of the immune system and may lower one's ability to fight infections. FABHALTA increases the chance of getting serious infections caused by encapsulated bacteria, including Streptococcus pneumoniae, Neisseria meningitidis, and Haemophilus influenzae type b. These serious infections may quickly become life-threatening or fatal if not recognized and treated early. Patients must complete or update vaccinations against Streptococcus pneumoniae and Neisseria meningitidis at least 2 weeks before the first dose of FABHALTA. If patients have not completed vaccinations and FABHALTA therapy must be started right away, they should receive the required vaccinations as soon as possible. If patients have not been vaccinated and FABHALTA must be started right away, they should also receive antibiotics to take for as long as their doctor tells them. If patients have been vaccinated against these bacteria in the past, they might need additional vaccinations before starting FABHALTA. Their doctor will decide if they need additional vaccinations. Vaccines do not prevent all infections caused by encapsulated bacteria. Patients should call their doctor or get emergency medical care right away if they have any of these signs and symptoms of a serious infection: fever with or without shivers or chills, fever with chest pain and cough, fever with high heart rate, headache and fever, confusion, clammy skin, fever and a rash, fever with breathlessness or fast breathing, headache with nausea or vomiting, headache with stiff neck or stiff back, body aches with flu-like symptoms, or eyes sensitive to light. Doctors will give their patients a Patient Safety Card about the risk of serious infections. Patients must carry it with them at all times during treatment and for 2 weeks after their last dose of FABHALTA. The risk of serious infections may continue for a few weeks after their last dose of FABHALTA. It is important for patients to show this card to any doctor who treats them. This will help doctors diagnose and treat patients quickly. FABHALTA is only available through a program called the FABHALTA Risk Evaluation and Mitigation Strategy (REMS). Before patients can take FABHALTA, their doctor must enroll in the FABHALTA REMS program, counsel patients about the risk of serious infections caused by certain bacteria, give patients information about the symptoms of serious infections, make sure that patients are vaccinated against serious infections caused by encapsulated bacteria and that they receive antibiotics if they need to start FABHALTA right away and are not up to date on vaccinations, as well as give patients a Patient Safety Card about the risk of serious infections. Patients should not take FABHALTA if they are allergic to FABHALTA or any of the ingredients in FABHALTA. Patients should not take FABHALTA if they have a serious infection caused by encapsulated bacteria, including Streptococcus pneumoniae, Neisseria meningitidis, or Haemophilus influenzae type b when starting FABHALTA. Before taking FABHALTA, patients should tell their doctor about all their medical conditions, including if they have an infection or fever, have liver problems, are pregnant or plan to become pregnant (it is not known if FABHALTA will harm an unborn baby), or are breastfeeding or plan to breastfeed as it is not known if FABHALTA passes into breast milk. Patients should not breastfeed during treatment and for 5 days after the final dose of FABHALTA. Patients should tell their doctor about all the medicines they take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Taking FABHALTA with certain other medicines may affect the way FABHALTA works and may cause side effects. Patients should know the medicines they take and the vaccines they receive. Patients should keep a list of them to show their doctor and pharmacist when they get a new medicine. FABHALTA may cause serious side effects, including those mentioned above as well as increased cholesterol and triglyceride (lipid) levels in the blood. Doctors will do blood tests to check patients' cholesterol and triglycerides during treatment with FABHALTA. Doctors may start patients on medicine to lower cholesterol if needed. The most common side effects of FABHALTA in adults include headache; nasal congestion, runny nose, cough, sneezing, and sore throat (nasopharyngitis); diarrhea; pain in the stomach (abdomen); infections (bacterial and viral); nausea; and rash. Please see full Prescribing Information, including Boxed WARNING and Medication Guide. Novartis in kidney disease At Novartis, our journey in nephrology began more than 40 years ago when the development and introduction of cyclosporine helped reimagine the field of transplantation and immunosuppression. We continue today with a broad renal R&D portfolio targeting the underlying causes of disease to preserve kidney function. We aim to help transform the lives of people living with kidney diseases, enabling them to live longer without the need for dialysis or transplantation. Disclaimer This press release contains forward-looking statements within the meaning of the United States Private Securities Litigation Reform Act of 1995. Forward-looking statements can generally be identified by words such as "potential," "can," "will," "plan," "may," "could," "would," "expect," "anticipate," "look forward," "believe," "committed," "investigational," "pipeline," "launch," "progress," "accelerated," "targets," "continued," "contingent," "progressive," "evolving," "enable," "innovation," "ongoing," "evaluating," "evolve," "committed," "advance," "advancing," "commitment," "to developing," "to provide, "development," "to address," or similar terms, or by express or implied discussions regarding potential marketing approvals, new indications or labeling for Fabhalta or the other investigational or approved products described in this press release, or regarding potential future revenues from such product. You should not place undue reliance on these statements. Such forward-looking statements are based on our current beliefs and expectations regarding future events, and are subject to significant known and unknown risks and uncertainties. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those set forth in the forward-looking statements. There can be no guarantee that Fabhalta or the other investigational or approved products described in this press release will be submitted or approved for sale or for any additional indications or labeling in any market, or at any particular time. Nor can there be any guarantee that such products will be commercially successful in the future. In particular, our expectations regarding such products could be affected by, among other things, the uncertainties inherent in research and development, including clinical trial results and additional analysis of existing clinical data; regulatory actions or delays or government regulation generally; global trends toward health care cost containment, including government, payor and general public pricing and reimbursement pressures and requirements for increased pricing transparency; our ability to obtain or maintain proprietary intellectual property protection; the particular prescribing preferences of physicians and patients; general political, economic and business conditions, including the effects of and efforts to mitigate pandemic diseases; safety, quality, data integrity or manufacturing issues; potential or actual data security and data privacy breaches, or disruptions of our information technology systems, and other risks and factors referred to in Novartis AG's current Form 20-F on file with the US Securities and Exchange Commission. Novartis is providing the information in this press release as of this date and does not undertake any obligation to update any forward-looking statements contained in this press release as a result of new information, future events or otherwise. About Novartis Novartis is an innovative medicines company. Every day, we work to reimagine medicine to improve and extend people's lives so that patients, healthcare professionals and societies are empowered in the face of serious disease. Our medicines reach more than 250 million people worldwide. Reimagine medicine with us: Visit us at and and connect with us on LinkedIn, Facebook, X/Twitter and Instagram. References Smith RJ, Kavanagh D, Vivarelli M, et al. Efficacy and safety of iptacopan in patients with C3 glomerulopathy: 12-Month results from the Phase 3 APPEAR-C3G study. Presented at American Society of Nephrology (ASN) Kidney Week 2024; October 23-27, 2024; San Diego, CA. FABHALTA prescribing information. East Hanover, NJ: Novartis Pharmaceuticals Corp; August 2024. Schena FP, Esposito P, Rossini M. A Narrative Review on C3 Glomerulopathy: A Rare Renal Disease. Int J Mol Sci. 2020;21(2):525. Martín B, Smith RJH. In: Adam MP, Feldman J, Mirzaa GM, et al., editors. C3 Glomerulopathy. GeneReviews® [Internet]. Updated 2018. University of Washington, Seattle; 1993-2024. Available from: . Accessed September 2024. Kidney Disease: Improving Global Outcomes (KDIGO) Glomerular Diseases Work Group. KDIGO 2021 Clinical Practice Guideline for the Management of Glomerular Diseases. Kidney Int. 2021;100(4S):S1-S276. Kavanagh D, Bomback A, Vivarelli M, et al. Efficacy and Safety of Iptacopan in Patients with C3 Glomerulopathy: Results from the Phase 3 APPEAR-C3G Trial. Presented at European Renal Association (ERA) Congress; May 25, 2024; Stockholm, Sweden. Smith RJH, Appel GB, Blom AM, et al. C3 Glomerulopathy – understanding a rare complement-driven renal disease. Nat Rev Nephrol. 2019;15(3):129-143. ClinicalTrials.gov. Study of Efficacy and Safety of Iptacopan in Patients With C3 Glomerulopathy. (APPEAR-C3G). Available from: . Accessed September 2024. Caravaca-Fontán F, Lucientes L, Cavero T, Praga M. Update on C3 Glomerulopathy: A Complement-Mediated Disease. Nephron. 2020;144(6):272-280. Ravindran A, Fervenza FC, Smith RJH, Sethi S. C3 Glomerulopathy Associated with Monoclonal Ig is a Distinct Subtype. Kidney Int. 2018;94(1):178-186. Medjeral-Thomas NR, O'Shaughnessy MM, O'Regan JA, et al. C3 Glomerulopathy: Clinicopathologic Features and Predictors of Outcome. Clin J Am Soc Nephrol. 2014;9(1):46-53. ### SOURCE Novartis Pharmaceuticals Corporation WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED

Statistically significant 68% (p<0.0001) proteinuria reduction compared to placebo, with reduction observed as early as Week 4 All secondary endpoints favored treatment with pegcetacoplan, including: Stabilized eGFR, a key measure of kidney function 71% of patients achieved zero C3c staining intensity, demonstrating complete clearance of C3c deposits Results consistent across subgroups including C3G and IC-MPGN, adolescent and adult patients, and native and post-transplant kidneysDemonstrated favorable safety profile WALTHAM, Mass., Oct. 26, 2024 (GLOBE NEWSWIRE) -- Apellis Pharmaceuticals, Inc. (Nasdaq: APLS) and Sobi® today announced that positive results from the Phase 3 VALIANT study were presented as an oral presentation during the High-Impact Clinical Trials session at the American Society of Nephrology (ASN) Kidney Week. The results highlighted the strength of systemic pegcetacoplan treatment in patients with C3 glomerulopathy (C3G) and primary immune complex membranoproliferative glomerulonephritis (IC-MPGN), which are rare, debilitating kidney diseases. “These unprecedented results represent a potential breakthrough for patients living with C3G and IC-MPGN. Pegcetacoplan is the only treatment to achieve substantial and clinically meaningful effects across all key markers of disease: proteinuria, eGFR stabilization, and C3c staining,” said Carla Nester, M.D., MSA, FASN, lead principal investigator for the VALIANT study, professor of internal medicine and pediatrics, and director of pediatric nephrology, University of Iowa Stead Family Children's Hospital. “C3G and IC-MPGN affect patients as early as adolescence, often leading to either a kidney transplant or lifelong dialysis, so there is an urgent need for an approved treatment that can prolong kidney function.” Statistically significant 68% proteinuria reduction across a broad study population, with reduction observed as early as Week 4Pegcetacoplan-treated patients showed a statistically significant and clinically meaningful 68.1% (p<0.0001) proteinuria reduction (log-transformed ratio of urine protein-to-creatinine ratio) compared to placebo, both in addition to standard of care therapy, at Week 26. The proteinuria reduction was observed as early as Week 4 and continued through the six-month treatment period. Proteinuria reduction was consistent across broad patient subgroups including adolescent and adult patients, C3G and IC-MPGN patients, and patients with native and post-transplant kidneys. Pegcetacoplan stabilized eGFR and demonstrated substantial reduction in C3c staining Patients treated with pegcetacoplan achieved stabilization of estimated glomerular filtration rate (eGFR), a key measure of kidney function, with a difference of +6.3mL/min/1.73m2 (nominal p value=0.03) over six months compared to placebo. Additionally, a substantial proportion of patients treated with pegcetacoplan demonstrated a reduction in C3c staining intensity. Excessive C3c deposits are a key marker of disease activity, which can lead to kidney inflammation, damage, and failure. 74.3% of patients in the pegcetacoplan group and 11.8% on placebo achieved a reduction in C3c staining intensity by two or more orders of magnitude from baseline, resulting in 27-fold higher odds of achieving this reduction with pegcetacoplan (nominal p value <0.0001).71.4% of pegcetacoplan-treated patients achieved zero C3c staining intensity, demonstrating complete clearance of C3c deposits. “In the largest pivotal study in C3G and IC-MPGN, pegcetacoplan rapidly, significantly, and consistently improved key outcomes for patients with C3G and IC-MPGN,” said Peter Hillmen, M.B., Ch.B., Ph.D., chief medical advisor, rare, Apellis. “We are thrilled by these results, which underscore the potential for pegcetacoplan to significantly improve patients’ lives by directly targeting C3, the underlying cause of C3G and IC-MPGN.” All secondary endpoints favored treatment with pegcetacoplanIn addition to the positive results on proteinuria, eGFR, and C3c staining, pegcetacoplan demonstrated statistical significance on the key secondary endpoints of composite renal endpoint, which combines proteinuria reduction and eGFR stabilization, and proteinuria reduction of at least 50% compared to baseline, as well as a numerical improvement in the C3G histologic index activity score. During the randomized, controlled 26-week treatment period, pegcetacoplan demonstrated favorable safety and tolerability, as well as a high compliance rate, consistent with its established profile. Rates of treatment-emergent adverse events (AEs) (84.1% in pegcetacoplan vs. 93.4% in placebo), serious AEs (9.5% vs. 9.8%), severe AEs (4.8 % vs. 6.6%), and AEs leading to study discontinuation (1.6% vs. 1.6%) were similar between the pegcetacoplan and placebo groups. There were no cases of meningococcal meningitis or serious infections attributed to encapsulated bacteria. All patients who have already completed the VALIANT study have now enrolled into the VALE long-term extension study. Apellis plans to submit a supplemental new drug application to the U.S. Food and Drug Administration in early 2025. Sobi plans to submit a marketing application with the European Medicines Agency in 2025. About the VALIANT StudyThe VALIANT Phase 3 study (NCT05067127) is a randomized, placebo-controlled, double-blinded, multi-center study designed to evaluate pegcetacoplan efficacy and safety in 124 patients who are 12 years of age and older with C3G or primary IC-MPGN. It is the largest single trial conducted in these populations and the only study to include adolescent and adult patients, with native and post-transplant kidneys. Study participants were randomized to receive pegcetacoplan or placebo twice weekly for 26 weeks. Following this 26-week randomized controlled period, patients are able to proceed to a 26-week open-label phase in which all patients receive pegcetacoplan. The primary endpoint of the study was the log transformed ratio of urine protein-to-creatinine ratio (uPCR) at Week 26 compared to baseline. About C3 Glomerulopathy (C3G) and Primary Immune-Complex Membranoproliferative Glomerulonephritis (IC-MPGN)C3G and primary IC-MPGN are rare and debilitating kidney diseases that can lead to kidney failure. Excessive C3c deposits are a key marker of disease activity, which can lead to kidney inflammation, damage, and failure. There are no treatments that target the underlying cause of these diseases. Approximately 50% of people living with C3G and IC-MPGN suffer from kidney failure within five to 10 years of diagnosis, requiring a burdensome kidney transplant or lifelong dialysis.1 Additionally, 90% of patients who previously received a kidney transplant will experience disease recurrence.2 The diseases are estimated to affect 5,000 people in the United States and up to 8,000 in Europe.3 About Pegcetacoplan in Rare DiseasesPegcetacoplan is a targeted C3 therapy designed to regulate excessive activation of the complement cascade, a part of the body’s immune system, which can lead to the onset and progression of many serious diseases. Pegcetacoplan is under investigation for rare diseases across hematology and nephrology. Pegcetacoplan is approved for the treatment of paroxysmal nocturnal hemoglobinuria (PNH) as EMPAVELI®/Aspaveli® in the United States, European Union, and other countries globally. About the Apellis and Sobi CollaborationApellis and Sobi have global co-development rights for systemic pegcetacoplan. Sobi has exclusive ex-U.S. commercialization rights for systemic pegcetacoplan, and Apellis has exclusive U.S. commercialization rights for systemic pegcetacoplan and worldwide commercial rights for ophthalmological pegcetacoplan, including for geographic atrophy. About ApellisApellis Pharmaceuticals, Inc. is a global biopharmaceutical company that combines courageous science and compassion to develop life-changing therapies for some of the most challenging diseases patients face. We ushered in the first new class of complement medicine in 15 years and now have two approved medicines targeting C3. These include the first-ever therapy for geographic atrophy, a leading cause of blindness around the world. We believe we have only begun to unlock the potential of targeting C3 across serious retinal, rare, and neurological diseases. For more information, please visit http://apellis.com or follow us on X (Twitter) and LinkedIn. Apellis Forward-Looking Statement Statements in this press release about future expectations, plans and prospects, as well as any other statements regarding matters that are not historical facts, may constitute “forward-looking statements” within the meaning of The Private Securities Litigation Reform Act of 1995. These statements include, but are not limited to, statements regarding plans to submit applications for regulatory approval for the treatment of patients with C3G and IC-MPGN. The words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,” “project,” “should,” “target,” “will,” “would” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Actual results may differ materially from those indicated by such forward-looking statements as a result of various important factors, including whether systemic pegcetacoplan will receive approval for those indications from the FDA or equivalent foreign regulatory agencies when expected or at all; and any other factors discussed in the “Risk Factors” section of Apellis’ Annual Report on Form 10-K with the Securities and Exchange Commission on February 27, 2024 and the risks described in other filings that Apellis may make with the Securities and Exchange Commission. Any forward-looking statements contained in this press release speak only as of the date hereof, and Apellis specifically disclaims any obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise.Media:Tracy Vineismedia@apellis.com 617-420-4839 Investors: Meredith Kaya meredith.kaya@apellis.com617.599.8178 References 1. C3 glomerulopathy. National Institute of Health, Genetics Home Reference. https://ghr-nlm-nih-gov.libproxy1.nus.edu.sg/condition/c3-glomerulopathy#resources. Accessed November 21, 2019. 2. Tarragón, B, et al. C3 Glomerulopathy Recurs Early after Kidney Transplantation in Serial Biopsies Performed within the First 2 Years after Transplantation. Clinical Journal of the American Society of Nephrology. August 2024; 19(8)1005-1015. doi: 10.2215/CJN.0000000000000474.3. Data on file using literature consensus.