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Zodasiran significantly reduced triglycerides and atherogenic triglyceride rich lipoproteins across all dose levels at Week 24 Data presented at European Atherosclerosis Society 92nd Congress and simultaneously published in the New England Journal of Medicine PASADENA, Calif.--(BUSINESS WIRE)-- Arrowhead Pharmaceuticals, Inc. (NASDAQ: ARWR) today announced results from the Phase 2b double blind, randomized ARCHES-2 study of investigational zodasiran (formerly ARO-ANG3) in patients with mixed hyperlipidemia. Zodasiran was associated with robust and durable reductions in triglycerides, triglyceride rich lipoprotein remnants, and total atherogenic lipoproteins, including LDL-C. These data were presented in a late-breaking oral presentation today at the European Atherosclerosis Society (EAS) 92nd Congress and simultaneously published in the New England Journal of Medicine. “Results from clinical studies of zodasiran, including those for the ARCHES-2 study in patients with mixed hyperlipidemia presented today at EAS and published in the New England Journal of Medicine, continue to support ANGPTL3 as an exciting target for an RNAi-based gene silencing strategy,” said Bruce Given, M.D., interim chief medical scientist at Arrowhead. “Genetic studies show that ANGPTL3 loss-of-function variants lead to enhanced lipoprotein lipase and endothelial lipase activity, resulting in lower concentrations of most plasma lipoproteins, including triglyceride rich lipoproteins, LDL-C, VLDL/remnant cholesterol, and HDL-C. Individuals with these variants also have demonstrated a markedly reduced risk of ASCVD and have no known adverse clinical phenotypes1-3.” Robert Rosenson, M.D., Icahn School of Medicine at Mount Sinai, and Principal Investigator for the ARCHES-2 study added, “The potent reductions in serum lipids and lipoproteins and favorable safety pro in the ARCHES-2 clinical study of zodasiran suggest its potential to treat residual ASCVD risk in patients with elevated triglyceride rich lipoproteins. The genetic data around ANGPTL3 as a target are very compelling and support further Phase 3 studies to determine whether the large reductions in triglyceride rich lipoproteins observed after zodasiran treatment can replicate the genetic data and reduce ASCVD risk.” Select ARCHES-2 Results Zodasiran treatment was associated with dose-dependent placebo adjusted reductions in triglycerides, remnant cholesterol, LDL-C, ApoB, and Non-HDL-C across all dose levels in patients with mixed hyperlipidemia. At week 24, representing trough effect, zodasiran treatment at 50, 100, and 200 mg on day 1 and week 12 was associated with placebo adjusted reductions in triglycerides of -51%, -57%, and -63% (all p<0.001) respectively. ANPTL3, the genetic target of zodasiran, was reduced compared with placebo by -54%, -70%, and -74%, and remnant cholesterol levels were reduced by -73%, -76%, and -82%, which strongly correlated with changes in triglyceride levels. Changes in other atherogenic lipoprotein parameters were also observed across all three dose levels. At week 24, the following placebo adjusted changes were observed for the 200 mg dose: LDL-C -20%, ApoB -22%; Non-HDL-C -36%. In a subset of patients with baseline liver fat fraction greater than 8%, dose-dependent liver fat reductions, measured by MRI-PDFF, were observed reaching -28% with the 200 mg dose compared with -2% with placebo. Safety and Tolerability Zodasiran demonstrated a favorable safety pro patients with mixed hyperlipidemia in the ARCHES-2 study. Treatment-emergent adverse events (TEAEs) were generally balanced between treatment and placebo groups and generally reflected the comorbidities and underlying conditions of the study population. There were no clinically meaningful changes in laboratory safety evaluations, no changes in mean platelet counts, and modest changes in HbA1c. Details about the EAS presentation is listed below. European Atherosclerosis Society (EAS) 92nd Congress – May 26-29, 2024 Title: ZODASIRAN SILENCES HEPATIC ANGPTL3 LEADING TO DEEP AND DURABLE REDUCTIONS IN ATHEROGENIC LIPIDS AND LIPOPROTEINS IN MIXED DYSLIPIDEMIA PATIENTS: FINAL RESULTS FROM ARCHES-2, DOUBLE-BLIND PERIOD Date/Time: May 29, 2024, 11:30 a.m. CEST Presenter: Robert Rosenson, M.D. Session: Late Breaker Session 2: New Therapeutic Agents Presentation materials may be accessed on the Events and Presentations page under the Investors section of the Arrowhead website after the presentation concludes. About ARCHES-2 ARCHES-2 (NCT04832971) is a double-blind, placebo-controlled dose-ranging Phase 2b clinical study of zodasiran in 204 participants with mixed hyperlipidemia. Participants with fasting triglycerides between 150-499 mg/dL and either LDL-cholesterol greater than 70 mg/dL or non-HDL-cholesterol greater 100 mg/dL were randomly assigned in a 3:1 ratio to receive subcutaneous injections of 50, 100, or 200 mg zodasiran or placebo on day 1 and week 12 and followed through week 36. The primary objective of the study was to evaluate the safety and efficacy of plozasiran in adults with mixed hyperlipidemia. About Mixed Hyperlipidemia Mixed hyperlipidemia, also called mixed dyslipidemia, is a highly prevalent disorder characterized by elevated low-density lipoprotein cholesterol (LDL-C) and triglyceride levels. Despite the efficacy of LDL-C-lowering therapies in reducing atherosclerotic cardiovascular disease (ASCVD) risk in mixed hyperlipidemia, there remains substantial residual risk attributed to elevated non-HDL driven by remnant cholesterol in triglyceride-rich lipoproteins4-7h. Genome-wide association and Mendelian randomization studies also support a causal role for triglyceride rich lipoproteins in ASCVD8-11. About Zodasiran Zodasiran, previously called ARO-ANG33, is a first-in-class investigational RNA interference (RNAi) therapeutic designed to reduce production of angiopoietin-like protein (ANGPTL3), which is a hepatocyte expressed regulator of lipid and lipoprotein metabolism with multiple potential modes of action, including inhibition of lipoprotein lipase (LPL) and endothelial lipase (EL)12,13. Genetic studies suggest that individuals with ANGPTL3 loss-of-function variants have enhanced lipoprotein lipase and endothelial lipase activity, resulting in lower levels atherogenic lipoproteins and a reduced risk of ASCVD1-3. In clinical studies, investigational zodasiran demonstrated a favorable safety pro was associated with dose-dependent reductions in triglycerides, triglyceride rich lipoprotein remnants, and total atherogenic lipoproteins, including LDL-C, in patients with homozygous and heterozygous familial cholesterolemia (HoFH) and mixed hyperlipidemia. About Arrowhead Pharmaceuticals Arrowhead Pharmaceuticals develops medicines that treat intractable diseases by silencing the genes that cause them. Using a broad portfolio of RNA chemistries and efficient modes of delivery, Arrowhead therapies trigger the RNA interference mechanism to induce rapid, deep, and durable knockdown of target genes. RNA interference, or RNAi, is a mechanism present in living cells that inhibits the expression of a specific gene, thereby affecting the production of a specific protein. Arrowhead’s RNAi-based therapeutics leverage this natural pathway of gene silencing. For more information, please visit , or follow us on X (formerly Twitter) at @ArrowheadPharma or on LinkedIn. To be added to the Company's email list and receive news directly, please visit . Safe Harbor Statement under the Private Securities Litigation Reform Act: This news release contains forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. Any statements contained in this release except for historical information may be deemed to be forward-looking statements. Without limiting the generality of the foregoing, words such as “may,” “will,” “expect,” “believe,” “anticipate,” “hope,” “intend,” “plan,” “project,” “could,” “estimate,” “continue,” “target,” “forecast” or “continue” or the negative of these words or other variations thereof or comparable terminology are intended to identify such forward-looking statements. In addition, any statements that refer to projections of our future financial performance, trends in our business, expectations for our product pipeline or product candidates, including anticipated regulatory submissions and clinical program results, prospects or benefits of our collaborations with other companies, or other characterizations of future events or circumstances are forward-looking statements. These forward-looking statements include, but are not limited to, statements about the initiation, timing, progress and results of our preclinical studies and clinical trials, and our research and development programs; our expectations regarding the potential benefits of the partnership, licensing and/or collaboration arrangements and other strategic arrangements and transactions we have entered into or may enter into in the future; our beliefs and expectations regarding milestone, royalty or other payments that could be due to or from third parties under existing agreements; and our estimates regarding future revenues, research and development expenses, capital requirements and payments to third parties. These statements are based upon our current expectations and speak only as of the date hereof. Our actual results may differ materially and adversely from those expressed in any forward-looking statements as a result of numerous factors and uncertainties, including the impact of the ongoing COVID-19 pandemic on our business, the safety and efficacy of our product candidates, decisions of regulatory authorities and the timing thereof, the duration and impact of regulatory delays in our clinical programs, our ability to finance our operations, the likelihood and timing of the receipt of future milestone and licensing fees, the future success of our scientific studies, our ability to successfully develop and commercialize drug candidates, the timing for starting and completing clinical trials, rapid technological change in our markets, the enforcement of our intellectual property rights, and the other risks and uncertainties described in our most recent Annual Report on Form 10-K, subsequent Quarterly Reports on Form 10-Q and other documents filed with the Securities and Exchange Commission from time to time. We assume no obligation to update or revise forward-looking statements to reflect new events or circumstances. Source: Arrowhead Pharmaceuticals, Inc. ________________ 1. Dewey, et al. N Engl J Med. 2017;377 (3):211-21. 2. Minicocci, et al. J Lipid Res. 2013;54(12): 3481-90 3. Musunuru, et al. N Engl J Med. 2010; 363(23):2220-7 4. Gugliucci A. J Clin Med. 2023;12:4399. 5. Silverman MG, et al. JAMA. 2016;316(12):1289-1297 6. Langsted A, et al. J Int Med. 2020;288:116–127. 7. Fu L, et al. Diabetes Care. 2022;45(9):2136-2143. 8. Bjornson E, et al. Eur Heart J. 2023;44:4186-4195 9. Nordestgaard BG. Circ Res. 2016;118:547-563. 10. Virani SS, et al. J Am Coll Cardiol. 2021;78(9):960-993 11. Hussain A, et al. Curr Atheroscler Rep. 2020;22:25. 12. Adam, et al. J Lipid Res. 2020;61(9): 1271-86. 13. Rosenson. J Lipid Res. 2021:62:100060. View source version on businesswire.com: Contacts Arrowhead Pharmaceuticals, Inc. Vince Anzalone, CFA 626-304-3400 ir@arrowheadpharma.com Investors: LifeSci Advisors, LLC Brian Ritchie 212-915-2578 britchie@lifesciadvisors.com Media: LifeSci Communications, LLC Kendy Guarinoni, Ph.D. 724-910-9389 kguarinoni@lifescicomms.com Source: Arrowhead Pharmaceuticals, Inc. View this news release online at:

- 44-48% Mean Reductions in LDL-C Achieved on Top of Continued Standard of Care - Phase 3 Planning is Ongoing PASADENA, Calif.--(BUSINESS WIRE)-- Arrowhead Pharmaceuticals, Inc. (NASDAQ: ARWR) today presented interim data from the ongoing Phase 2 GATEWAY clinical study of ARO-ANG3, the company’s investigational RNAi therapeutic designed to reduce expression of angiopoietin-like protein 3 (ANGPTL3), in patients with homozygous familial hypercholesterolemia (HoFH). The company is currently planning a Phase 3 study to further investigate ARO-ANG3 and intends to conduct a meeting with regulatory authorities in the second half of 2023 to discuss the proposed study design. The data were presented at the 91st European Atherosclerosis Society Congress in a poster titled, “ARO-ANG3, an Investigational RNAi Therapeutic, Decreases Serum LDL-Cholesterol, Apolipoprotein B, and Angiopoietin-like Protein 3 in Patients with Homozygous Familial Hypercholesterolaemia,” which may be accessed on the Events and Presentations page under the Investors section of the Arrowhead website. Javier San Martin, M.D., chief medical officer at Arrowhead, said: “Despite advances in the treatment of cardiovascular disease associated with high LDL-cholesterol, patients with HoFH have a particularly high need for additional therapy with a mechanism working outside of the LDL receptor, such as ANGPTL3 inhibition, and with a dose regimen which can help improve adherence and compliance. The data generated in the GATEWAY study of ARO-ANG3 in patients with HoFH and our prior clinical studies in patient populations with different levels and cause of hypercholesterolemia, demonstrate that ANGPTL3 inhibition led to substantial reductions in LDL-cholesterol, Non-HDL-C, triglycerides, ApoB, and other key lipids and atherogenic lipoproteins. These results are very encouraging and support our plan to rapidly advance ARO-ANG3 into a Phase 3 clinical study in patients with HoFH.” Key findings from the GATEWAY study include the following: At study week 20, administration of 200 mg or 300 mg ARO-ANG3 on day 1 and day 84 led to the following changes: Mean reductions in LDL-C (Martin-Hopkins) of 48.1% and 44.0%, respectively These reductions were achieved on top of continued standard of care, including statins, ezetimibe, PCSK9 inhibitors, and apheresis Mean reductions in ApoB of 39.2% and 34.5%, respectively Mean reductions in ANGPTL3 of 82.7% and 80.1%, respectively ANPTL3 inhibition with ARO-ANG3 also reduced HDL-C, non-HDL-C, and triglycerides, consistent with published human genetic data Safety and tolerability Overall, no newly identified patterns of adverse events in HoFH patients No treatment emergent adverse events leading to drug discontinuation, dose interruptions, or study withdrawal One serious adverse event of second degree atrioventricular block reported in a patient with extensive atherosclerotic cardiovascular disease history, considered not related to ARO-ANG3 About Homozygous Familial Hypercholesterolemia Homozygous familial hypercholesterolemia (HoFH) is the most serious and rare form of familial hypercholesterolemia, which if left untreated leads to early clinical manifestations of coronary artery disease. Most cases of HoFH are due to mutations in the low-density lipoprotein receptor (LDLR) gene coding for the LDL receptor. Thus, patients with HoFH due to dysfunctional or absent LDLR can be resistant to standards of care such as statins and even resistant to alternatives such as PCSK9 inhibitors. Patients with HoFH are therefore a population with a particularly high need for additional therapy with a mechanism working outside of the LDL receptor, such as therapeutic ANGPTL3 inhibition. About the GATEWAY Phase 2 Study The AROANG3-2003 GATEWAY study (NCT05217667) is a Phase 2 open-label study to evaluate the efficacy, safety, and tolerability of 200 mg and 300 mg of ARO-ANG3 administered once every 12 weeks in 18 patients with HoFH. The initial treatment period is up to 36 weeks with an optional 24-month extension treatment period. The primary endpoint of the study is the percent change from baseline in LDL-cholesterol. About ARO-ANG3 ARO-ANG3 is an investigational RNAi therapeutic designed to reduce expression of angiopoietin-like protein 3 (ANGPTL3), a hepatocyte expressed regulator of lipid and lipoprotein metabolism with multiple potential modes of action, including inhibition of lipoprotein lipase and endothelial lipase. Given the inhibitory role of ANGPTL3 in the metabolism of various lipoproteins and triglycerides, reduced expression and reduced circulating levels of ANGPTL3 may increase clearance of LDL-cholesterol, HDL-cholesterol, and triglycerides. About Arrowhead Pharmaceuticals Arrowhead Pharmaceuticals develops medicines that treat intractable diseases by silencing the genes that cause them. Using a broad portfolio of RNA chemistries and efficient modes of delivery, Arrowhead therapies trigger the RNA interference mechanism to induce rapid, deep, and durable knockdown of target genes. RNA interference, or RNAi, is a mechanism present in living cells that inhibits the expression of a specific gene, thereby affecting the production of a specific protein. Arrowhead’s RNAi-based therapeutics leverage this natural pathway of gene silencing. For more information, please visit , or follow us on Twitter @ArrowheadPharma. To be added to the Company's email list and receive news directly, please visit . Safe Harbor Statement under the Private Securities Litigation Reform Act: This news release contains forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. Any statements contained in this release except for historical information may be deemed to be forward-looking statements. Without limiting the generality of the foregoing, words such as “may,” “will,” “expect,” “believe,” “anticipate,” “hope,” “intend,” “plan,” “project,” “could,” “estimate,” “continue,” “target,” “forecast” or “continue” or the negative of these words or other variations thereof or comparable terminology are intended to identify such forward-looking statements. In addition, any statements that refer to projections of our future financial performance, trends in our business, expectations for our product pipeline or product candidates, including anticipated regulatory submissions and clinical program results, prospects, or benefits of our collaborations with other companies, or other characterizations of future events or circumstances are forward-looking statements. These forward-looking statements include, but are not limited to, statements about the initiation, timing, progress and results of our preclinical studies and clinical trials, and our research and development programs; our expectations regarding the potential benefits of the partnership, licensing and/or collaboration arrangements and other strategic arrangements and transactions we have entered into or may enter into in the future; our beliefs and expectations regarding milestone, royalty or other payments that could be due to or from third parties under existing agreements; and our estimates regarding future revenues, research and development expenses, capital requirements and payments to third parties. These statements are based upon our current expectations and speak only as of the date hereof. Our actual results may differ materially and adversely from those expressed in any forward-looking statements as a result of numerous factors and uncertainties, including the impact of the ongoing COVID-19 pandemic on our business, the safety and efficacy of our product candidates, decisions of regulatory authorities and the timing thereof, the duration and impact of regulatory delays in our clinical programs, our ability to finance our operations, the likelihood and timing of the receipt of future milestone and licensing fees, the future success of our scientific studies, our ability to successfully develop and commercialize drug candidates, the timing for starting and completing clinical trials, rapid technological change in our markets, the enforcement of our intellectual property rights, and the other risks and uncertainties described in our most recent Annual Report on Form 10-K, subsequent Quarterly Reports on Form 10-Q and other documents filed with the Securities and Exchange Commission from time to time. We assume no obligation to update or revise forward-looking statements to reflect new events or circumstances. Source: Arrowhead Pharmaceuticals, Inc.

Approval extends Evkeeza to children aged 5 to 11 with homozygous familial hypercholesterolemia (HoFH), an inherited condition characterized by extremely high low-density lipoprotein cholesterol (LDL-C) 48% reduction in LDL-C from baseline at week 24 when Evkeeza was added to other lipid-lowering therapies in the pivotal trial TARRYTOWN, N.Y., March 22, 2023 (GLOBE NEWSWIRE) -- Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) today announced the U.S. Food and Drug Administration (FDA) has extended the approval of Evkeeza® (evinacumab-dgnb) as an adjunct to other lipid-lowering therapies to treat children aged 5 to 11 with homozygous familial hypercholesterolemia (HoFH). Evkeeza is the first angiopoietin-like 3 (ANGPTL3) inhibitor treatment indicated for children as young as 5 years old to control dangerously high levels of low-density lipoprotein cholesterol (LDL-C) caused by HoFH. Evkeeza was initially approved as an adjunct to other lipid-lowering therapies in those aged 12 years and older with HoFH in February 2021. “At the Family Heart Foundation, we know that children with homozygous familial hypercholesterolemia, and those caring for them, often live in fear of what the future holds as they contend with the dangerously high levels of bad cholesterol, or LDL-C, caused by this genetic disorder,” said Mary McGowan, M.D., Chief Medical Officer of the Family Heart Foundation. “Only 5% of rare diseases actually have an FDA-approved treatment. With this FDA approval, the HoFH community now has a much-needed treatment for young children, potentially making it possible for many to achieve recommended LDL-C levels much earlier in the course of this rare disease. This is a hopeful development for those living with HoFH.” HoFH is an ultra-rare inherited condition that affects approximately 1,300 people in the U.S. and is the most severe form of familial hypercholesterolemia (FH). HoFH occurs when two copies of the FH-causing genes are inherited, one from each parent, resulting in dangerously high levels (usually >400 mg/dL) of LDL-C. Those living with HoFH are at risk for premature atherosclerotic disease and cardiac events even in their teenage years. Many patients are not diagnosed or are only diagnosed later in life. “Guidelines recommend screening all children at high risk for homozygous familial hypercholesterolemia starting at age 2. However, until now, a positive diagnosis was often met with the frustration of having limited treatment options to help these children,” said Carissa M. Baker-Smith, M.D., MPH, Co-Director of Nemours Cardiac Center Cardiovascular Research and Innovation Program, Director of Nemours Cardiac Center Pediatric Preventive Cardiology, pediatric cardiologist, and a trial investigator. “By adding Evkeeza to standard lipid-lowering therapies in this pivotal trial, children were able to reduce their LDL-C, with the vast majority able to achieve declines of nearly 50%. These are clinically meaningful results that physicians should consider when developing a treatment approach for these young patients.” Despite treatment with other lipid-lowering therapies, children entered the Phase 3 trial with an average LDL-C level of 264 mg/dL, more than twice the target (<110 mg/dL) for pediatric patients with HoFH. With the addition of Evkeeza, children were able to reduce their LDL-C by 48% at week 24 on average, meeting the trial’s primary endpoint. Significant reductions were also observed in other key secondary endpoints including levels of apolipoprotein B (ApoB), non-high-density lipoprotein cholesterol (non-HDL-C) and total cholesterol. The safety pro Evkeeza observed in these patients (n=20) was consistent with the safety pro in adults and pediatric patients aged 12 years and older, with the additional adverse reaction of fatigue. Fatigue was reported in 3 (15%) patients. The most common adverse events (AEs) occurring in >15% of patients were COVID-19 (n=15), pyrexia (n=5), headache (n=4), throat pain (oropharyngeal pain, n=4) as well as upper abdominal pain, diarrhea, vomiting, fatigue, nasopharyngitis, rhinitis and cough (all n=3). Most reported AEs were mild or moderate, and none led to study discontinuation. “Since it was first approved, Evkeeza has become the standard of care for homozygous familial hypercholesterolemia in those aged 12 years or older. We’re gratified that now children as young as 5 years old have the potential to benefit from this treatment,” said George D. Yancopoulos, M.D., Ph.D., President and Chief Scientific Officer at Regeneron. “As a first-in-class medicine for this relentless disease, Evkeeza exemplifies the promise of genetics-based research to transform treatment paradigms. Evkeeza’s journey from target discovery to treatment innovation was only made possible due to our long-term investment in genetics research and monoclonal antibody technologies, and this remains a central tenet of our science-first approach to this day.” Regeneron is committed to helping patients who have been prescribed Evkeeza access their medication. Regeneron's myRARE™ patient support program offers financial assistance to eligible patients who need help with the out-of-pocket cost of Evkeeza. Under the program, eligible patients with commercial insurance may pay as little as $0 in out-of-pocket costs for Evkeeza. In addition, myRARE™ offers resources to help patients and healthcare providers get started with Evkeeza including product information, insurance benefit verification, community resources and appointment reminders. For more information, call 1-833-EVKEEZA (833-385-3392) or visit The FDA evaluated the supplemental biologics license for Evkeeza in this indication under Priority Review, which is reserved for medicines that represent potentially significant improvements in efficacy or safety in treating serious conditions. The safety and effectiveness of Evkeeza have not been established in patients with other causes of hypercholesterolemia, including those with heterozygous familial hypercholesterolemia (HeFH). The effect of Evkeeza on cardiovascular morbidity and mortality has not been determined. About the Pivotal Pediatric Trial The three-part, single-arm, open-label trial evaluated Evkeeza added to other lipid-lowering therapies in pediatric patients with HoFH aged 5 to 11 years. Part A (n=6) was a Phase 1b trial designed to assess the pharmacokinetics (PK), safety and tolerability of Evkeeza. Part B (n=14) evaluated the efficacy of Evkeeza during a 24-week treatment period and enrolled patients with an average age of 9 years. Among them, 86% were on statins, 93% were on ezetimibe, 50% were on LDL apheresis and 14% were on lomitapide. Patients received Evkeeza 15 mg/kg every four weeks delivered intravenously alongside their lipid-lowering treatment regimen. The primary endpoint was change in LDL-C at week 24. Secondary endpoints included the effect of Evkeeza on other lipid parameters (i.e., apolipoprotein B, non-high-density lipoprotein cholesterol, lipoprotein[a] and total cholesterol), efficacy by mutation status, safety and tolerability, immunogenicity and PK. Patients who completed Part A or B were allowed to continue treatment in Part C (n=20), an ongoing Phase 3 extension trial. Parts A, B and C were not designed to evaluate the effect of Evkeeza on cardiovascular events. About Evkeeza® (evinacumab) Evkeeza was invented using Regeneron’s VelocImmune® technology and is a fully human monoclonal antibody that binds to and blocks the function of angiopoietin-like 3 (ANGPTL3), a protein that inhibits lipoprotein lipase (LPL) and endothelial lipase (EL) and regulates circulating lipids, including LDL-C. Regeneron scientists discovered the angiopoietin gene family more than two decades ago. Human genetics research published in New England Journal of Medicine in 2017 by scientists from the Regeneron Genetics Center® found that patients whose ANGPTL3 gene did not function properly (called a “loss-of function mutation”) have significantly lower levels of key blood lipids, including LDL-C, and that this is associated with a significantly lower risk of coronary artery disease. The generic name for Evkeeza in its approved U.S. indications is evinacumab-dgnb, with dgnb the suffix designated in accordance with Nonproprietary Naming of Biological Products Guidance for Industry issued by the U.S. FDA. Regeneron is responsible for the development and distribution of Evkeeza in the U.S. and is collaborating with Ultragenyx to clinically develop, commercialize and distribute Evkeeza outside of the U.S. About Regeneron’s VelocImmune Technology Regeneron’s VelocImmune technology utilizes a proprietary genetically engineered mouse platform endowed with a genetically humanized immune system to produce optimized fully human antibodies. When Regeneron's President and Chief Scientific Officer George D. Yancopoulos was a graduate student with his mentor Frederick W. Alt in 1985, they were the first to envision making such a genetically humanized mouse, and Regeneron has spent decades inventing and developing VelocImmune and related VelociSuite® technologies. Dr. Yancopoulos and his team have used VelocImmune technology to create a substantial proportion of all original, FDA-approved fully human monoclonal antibodies currently available. This includes Evkeeza® (evinacumab-dgnb), REGEN-COV® (casirivimab and imdevimab), Dupixent® (dupilumab), Libtayo® (cemiplimab-rwlc), Praluent® (alirocumab), Kevzara® (sarilumab) and Inmazeb® (atoltivimab, maftivimab and odesivimab-ebgn). IMPORTANT SAFETY INFORMATION FOR EVKEEZA® (evinacumab-dgnb) INJECTION Do not use EVKEEZA if you are allergic to evinacumab-dgnb or to any of the ingredients in EVKEEZA. Before receiving EVKEEZA, tell your healthcare provider about all of your medical conditions, including if you: Are pregnant or plan to become pregnant. EVKEEZA may harm your unborn baby. Tell your healthcare provider if you become pregnant while using EVKEEZA. People who are able to become pregnant: Your healthcare provider may do a pregnancy test before you start treatment with EVKEEZA You should use an effective method of birth control during treatment and for at least 5 months after the last dose of EVKEEZA. Talk with your healthcare provider about birth control methods that you can use during this time. Are breastfeeding or plan to breastfeed. It is not known if EVKEEZA passes into your breast milk. You and your healthcare provider should decide if you will receive EVKEEZA or breastfeed. Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. EVKEEZA can cause serious side effects, including: Allergic reactions (hypersensitivity), including a severe reaction known as anaphylaxis. Tell your healthcare provider right away if you get any of the following symptoms: swelling (mainly of the lips, tongue or throat which makes it difficult to swallow or breathe), breathing problems or wheezing, feeling dizzy or fainting, rash, hives, and itching. The most common side effects of EVKEEZA include symptoms of the common cold, flu-like symptoms, dizziness, pain in legs or arms, nausea, decreased energy and feeling tired or weak. Tell your healthcare provider if you have any side effect that bothers you or does not go away. These are not all the possible side effects of EVKEEZA. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. Please see full Prescribing Information, including Patient Information. About Regeneron Regeneron (NASDAQ: REGN) is a leading biotechnology company that invents, develops and commercializes life-transforming medicines for people with serious diseases. Founded and led for 35 years by physician-scientists, our unique ability to repeatedly and consistently translate science into medicine has led to nine FDA-approved treatments and numerous product candidates in development, almost all of which were homegrown in our laboratories. Our medicines and pipeline are designed to help patients with eye diseases, allergic and inflammatory diseases, cancer, cardiovascular and metabolic diseases, pain, hematologic conditions, infectious diseases and rare diseases. Regeneron is accelerating and improving the traditional drug development process through our proprietary VelociSuite® technologies, such as VelocImmune®, which uses unique genetically humanized mice to produce optimized fully human antibodies and bispecific antibodies, and through ambitious research initiatives such as the Regeneron Genetics Center, which is conducting one of the largest genetics sequencing efforts in the world. For more information, please visit or follow @Regeneron on Twitter. Forward-Looking Statements and Use of Digital Media This press release includes forward-looking statements that involve risks and uncertainties relating to future events and the future performance of Regeneron Pharmaceuticals, Inc. ("Regeneron" or the "Company"), and actual events or results may differ materially from these forward-looking statements. Words such as "anticipate," "expect," "intend," "plan," "believe," "seek," "estimate," variations of such words, and similar expressions are intended to identify such forward-looking statements, although not all forward-looking statements contain these identifying words. These statements concern, and these risks and uncertainties include, among others, the impact of SARS-CoV-2 (the virus that has caused the COVID-19 pandemic) on Regeneron's business and its employees, collaborators, and suppliers and other third parties on which Regeneron relies, Regeneron's and its collaborators' ability to continue to conduct research and clinical programs, Regeneron's ability to manage its supply chain, net product sales of products marketed or otherwise commercialized by Regeneron and/or its collaborators or licensees (collectively, "Regeneron's Products"), and the global economy; the nature, timing, and possible success and therapeutic applications of Regeneron's Products and product candidates being developed by Regeneron and/or its collaborators or licensees (collectively, "Regeneron's Product Candidates") and research and clinical programs now underway or planned, including without limitation Evkeeza® (evinacumab-dgnb) for the treatment of children aged 5 to 11 with homozygous familial hypercholesterolemia; uncertainty of the utilization, market acceptance, and commercial success of Regeneron's Products (such as Evkeeza) and Regeneron's Product Candidates and the impact of studies (whether conducted by Regeneron or others and whether mandated or voluntary), including the studies discussed or referenced in this press release, on any of the foregoing; the likelihood, timing, and scope of possible regulatory approval and commercial launch of Regeneron's Product Candidates and new indications for Regeneron's Products; the extent to which the results from the research and development programs conducted by Regeneron and/or its collaborators or licensees may be replicated in other studies and/or lead to advancement of product candidates to clinical trials, therapeutic applications, or regulatory approval; the ability of Regeneron's collaborators, licensees, suppliers, or other third parties (as applicable) to perform manufacturing, filling, finishing, packaging, labeling, distribution, and other steps related to Regeneron's Products and Regeneron's Product Candidates; the ability of Regeneron to manage supply chains for multiple products and product candidates; safety issues resulting from the administration of Regeneron's Products and Regeneron's Product Candidates in patients, including serious complications or side effects in connection with the use of Regeneron's Products and Regeneron's Product Candidates in clinical trials; determinations by regulatory and administrative governmental authorities which may delay or restrict Regeneron's ability to continue to develop or commercialize Regeneron's Products and Regeneron's Product Candidates; ongoing regulatory obligations and oversight impacting Regeneron's Products, research and clinical programs, and business, including those relating to patient privacy; the availability and extent of reimbursement of Regeneron's Products from third-party payers, including private payer healthcare and insurance programs, health maintenance organizations, pharmacy benefit management companies, and government programs such as Medicare and Medicaid; coverage and reimbursement determinations by such payers and new policies and procedures adopted by such payers; competing drugs and product candidates that may be superior to, or more cost effective than, Regeneron's Products and Regeneron's Product Candidates; unanticipated expenses; the costs of developing, producing, and selling products; the ability of Regeneron to meet any of its financial projections or guidance and changes to the assumptions underlying those projections or guidance; the potential for any license or collaboration agreement, including Regeneron's agreements with Sanofi and Bayer (or their respective affiliated companies, as applicable), as well as Regeneron's collaboration with Ultragenyx referenced in this press release, to be cancelled or terminated; and risks associated with intellectual property of other parties and pending or future litigation relating thereto (including without limitation the patent litigation and other related proceedings relating to EYLEA® (aflibercept) Injection, Praluent® (alirocumab), and REGEN-COV® (casirivimab and imdevimab)), other litigation and other proceedings and government investigations relating to the Company and/or its operations, the ultimate outcome of any such proceedings and investigations, and the impact any of the foregoing may have on Regeneron's business, prospects, operating results, and financial condition. A more complete description of these and other material risks can be found in Regeneron's filings with the U.S. Securities and Exchange Commission, including its Form 10-K for the year ended December 31, 2022. Any forward-looking statements are made based on management's current beliefs and judgment, and the reader is cautioned not to rely on any forward-looking statements made by Regeneron. Regeneron does not undertake any obligation to update (publicly or otherwise) any forward-looking statement, including without limitation any financial projection or guidance, whether as a result of new information, future events, or otherwise. Regeneron uses its media and investor relations website and social media outlets to publish important information about the Company, including information that may be deemed material to investors. Financial and other information about Regeneron is routinely posted and is accessible on Regeneron's media and investor relations website ( ) and its Twitter feed ( ). Regeneron Contacts: Media Relations Taylor Ramsey Tel: +1 914-409-2381 taylor.ramsey@regeneron.com Investor Relations Mark Hudson Tel: +1 914-847-3482 mark.hudson@regeneron.com