RegulationFast Track (United States), Orphan Drug (United States), Orphan Drug (European Union), Priority Review (China), Breakthrough Therapy (China), Orphan Drug (South Korea), Paediatric investigation plan (European Union), Promising Innovative Medicine (United Kingdom), Priority Review (United States)

Structure/Sequence

Sequence Code 18457995

Source: *****

Clinical Trials associated with Efgartigimod Alfa

NCT06831058

/ Not yet recruitingPhase 2IIT

A Pilot Study of Efgartigimod for Immune-mediated Thrombotic Thrombocytopenic Purpura (iTTP)

Immune-mediated Thrombotic thrombocytopenic purpura (iTTP) is a rare, autoimmune disorder characterized by life-threatening episodes of thrombocytopenia, microangiopathic hemolytic anemia and organ damage. Patients have an unpredictable course punctuated by relapses associated with autoantibody-mediated (primarily IgG) depletion of ADAMTS13, a key regulator of coagulation. ADAMTS13 deficiency during remission has been associated with increased risk of relapse, but also, and potentially more devastating, ischemic stroke.
Until recently, it was presumed that rituximab (a monoclonal antibody targeting B cells) improved relapse-free survival in most patients, but this was based on findings from very small studies. Given concern about stroke and relapse risk, preventive immunosuppression with rituximab has also recently come into practice for patients with falling ADAMTS13 activity (ADAMTS13-relapse). It is expected that following efgartigimod therapy, there will be a rise in ADAMTS13 activity to the normal range that will be sustained during the treatment period. Following withdrawal of therapy, it is expected that most participants will experience a fall in ADAMTS13 activity, demonstrating the safety and efficacy in efgartigimod to reliably but temporarily reduce pathogenic antibodies. This would demonstrate the potential efficacy for efgartigimod as a maintenance therapy to safely prevent relapse of iTTP to be further explored in a larger efficacy study.

Start Date01 May 2025

Sponsor / Collaborator

University of Minnesota

NCT06885762

/ Not yet recruitingPhase 2/3IIT

Safety and Efficacy of Efgartigimod in Guillain-Barré Syndrome

The goal of this clinical trial is to evaluating the efficacy and safety of efgartigimod in the treatment of Guillain-Barré Syndrome and exploring the immunological mechanisms of efgartigimod therapy in Guillain-Barré Syndrome. The main questions it aims to answer are:
Will efgartigimod improve the symptoms of participants? What medical problems do participants have when using efgartigimod?
Participants will:
On day 1 and day 5 of the treatment period, drug A was administered intravenously.
Keep a diary of their symptoms

Start Date13 Apr 2025

Sponsor / Collaborator

Xinqiao Hospital

NCT06528392

/ Not yet recruitingPhase 2IIT

Efgartigimod for Stiff Person Syndrome (ESPS)

The goal of this clinical trial is to examine the proportion of patients with stiff person syndrome with no worsening in stiffness and/or spasms while on efgartigimod-hyaluronidase (EFD) when compared to their current treatment. The main questions it aims to answer are:
* proportion of patients with stiff person syndrome with no worsening in DSI and HSS scores
* whether there are changes in laboratory values, vital signs, electrocardiogram, or depression, and suicide risk during the trial, as well as the incidence of any adverse events.
Participants will come to the clinic up to 18 times and have up to 5 phone call visits during the course of the trial. During these visits a variety of measures will be collected, including blood samples, neurological and physical exams, patient reported outcomes on stiffness, spasms, depression, and suicide risk.

Start Date01 Apr 2025

Sponsor / Collaborator

University of South Florida

100 Clinical Results associated with Efgartigimod Alfa

100 Translational Medicine associated with Efgartigimod Alfa

100 Patents (Medical) associated with Efgartigimod Alfa

186

Literatures (Medical) associated with Efgartigimod Alfa

31 Dec 2025·Human Vaccines & Immunotherapeutics

Impact of FcRn antagonism on vaccine-induced protective immune responses against viral challenge in COVID-19 and influenza mouse vaccination models

Article

Author: Vanhoenacker, Peter ; Baumeister, Judith ; Wouters, Heidi ; Schotsaert, Michael ; Laghlali, Gabriel ; Ulrichts, Peter ; Chang, Lauren A ; Singh, Gagandeep ; Binazon, Ornella ; Warang, Prajakta ; Elhemdaoui, Nadia ; Augustynková, Kateřina ; Moshir, Mahan ; Steeland, Sophie ; Notebaert, Margo

Antagonism of the neonatal Fc receptor through an engineered antibody Fc fragment, such as efgartigimod, results in a decrease in immunoglobulin G levels. This approach is being evaluated as a therapeutic strategy for the treatment of IgG-mediated autoimmune diseases. Our goal was to evaluate the impact of mFc-ABDEG, a mouse-adapted antibody Fc fragment with a mode of action highly similar to efgartigimod, on vaccine-induced protective immune responses against viral infections. Therefore, mouse vaccination models for COVID-19 and influenza were employed, utilizing an mRNA COVID-19 vaccine (COMIRNATY) and an adjuvanted, inactivated quadrivalent influenza vaccine (Seqirus+AddaVax), respectively. In both models, vaccination induced robust humoral responses. As expected, animals treated with mFc-ABDEG had lower levels of virus-specific IgG, while virus-specific IgM responses remained unaffected. The COVID-19 vaccine induced a strong Th1-type T cell response irrespective of mFc-ABDEG treatment. Influenza vaccination resulted in a poor T cell induction, regardless of mFc-ABDEG treatment, due to the Th2-biased response that inactivated influenza vaccines typically induce. Importantly, mFc-ABDEG treatment had no effect on protective immunity against live viral challenges in both models. Vaccinated animals treated with mFc-ABDEG were equally protected as the non-treated vaccinated controls. These non-clinical data demonstrate that FcRn antagonism with mFc-ABDEG did not affect the generation of vaccine-induced protective humoral and cellular responses, or protection against viral challenges. These data substantiate the clinical observations that, although IgG titers were reduced, FcRn antagonism with efgartigimod did not impair the ability to generate new specific IgG responses, regardless of the timing of vaccination.

01 Jul 2025·CLINICAL NEUROLOGY AND NEUROSURGERY

Efficacy and safety of FcRn inhibitors in patients with Myasthenia gravis: An updated systematic review and meta‑analysis

Review

Author: Hanif, Ummara ; Muzammil, Anam ; Farooqi, Hanzala Ahmed ; Hassan, Syed Muhammad ; Akhtar, Muzamil ; Maryam, Ayesha ; Khan, Zarak ; Athar, Zoya ; Akhtar, Mehmood

BACKGROUND:

Myasthenia gravis (MG) is a chronic, complex autoimmune disorder characterized by the production of autoantibodies that destroy neuromuscular junctions. Blocking the neonatal Fc receptors (FcRn) enhances IgG catabolism, offering a novel therapeutic approach.

METHODS:

PubMed, Embase, and the Cochrane Library were searched up to February 2025, for RCTs evaluating FcRn inhibitors in MG. A random effects model to calculate pooled risk ratios (RR) and mean differences with 95 % confidence intervals (CI).

RESULTS:

873 patients from 8 randomized control trials (RCTs) were analyzed. Compared to placebo, FcRn inhibitors significantly reduced Myasthenia Gravis Activities of Daily Living (MG-ADL) scores (MD of -1.45 [95 % CI, -1.91 to -0.99]; P < 0.00001), Quantitative Myasthenia Gravis( QMG) scores (MD = -2.33 [95 % CI, -3.57 to -1.09]; P = 0.0002), and Myasthenia Gravis Composite (MGC) scores (MD = -2.96 [95 % CI, -4.29 to -1.63]; P < 0.0001). The FcRn inhibitors improved MG-ADL responder rates (RR = 1.60 [95 % CI, 1.27-2.02]; P < 0.0001), and Myasthenia Gravis Quality of Life (MGQoL15r) scores (MD = -2.18 [95 % CI, -3.35 to -1.00]; P = 0.0003). Serious adverse events were lower with the FcRn inhibitors (32/519) than the placebo (39/397). Subgroup analysis revealed that Rozanolixizumab and Nipocalimab improved MG-ADL scores, but had inferior responder rates. Additionally, Rozanolixizumab significantly improved MGC scores but had more adverse events.

CONCLUSION:

FcRn inhibitors demonstrated good efficacy and safety in MG, with efgartigimod and nipocalimab showing strong efficacy without added risk. Further research is required to evaluate long-term outcomes and optimize treatment.

01 Jun 2025·MUSCLE & NERVE

Sustained Minimal Manifestations With Extended Interval Dosing of Efgartigimod in Seronegative Myasthenia Gravis: Case Report

Letter

Author: Iguchi, Yasuyuki ; Matsuno, Hiromasa ; Komatsu, Teppei ; Nakayama, Yoshitaka ; Motegi, Haruhiko ; Mitsumura, Hidetaka

305

News (Medical) associated with Efgartigimod Alfa

22 May 2025

·www.prnewswire.com

Johnson & Johnson's IMAAVY Gets FDA Approval, Taking on Top Players in Myasthenia Gravis Market | DelveInsight

The FDA has approved Johnson & Johnson's anti-FcRn antibody, nipocalimab, for the treatment of generalized myasthenia gravis. The drug will be sold under the brand name IMAAVY. This approval positions J&J to challenge leading competitors in the myasthenia gravis market, such as AstraZeneca, which markets the monoclonal antibodies SOLIRIS and ULTOMIRIS. J&J will also be competing with Argenx's VYVGART and UCB's RYSTIGGO and ZILBRYSQ. LAS VEGAS, May 22, 2025 /PRNewswire/ -- Myasthenia gravis is an autoimmune disorder in which antibodies disrupt the communication between nerves and muscles, resulting in skeletal muscle weakness. This weakness primarily affects voluntary muscles that control eye movement, facial expression, swallowing, and limb function. The condition is predominantly driven by autoantibodies targeting either the acetylcholine receptor (AChR-Ab) or a receptor-associated protein known as muscle-specific tyrosine kinase (MuSK-Ab). According to DelveInsight's analysis, there were approximately 300,000 diagnosed prevalent cases of myasthenia gravis across the 7MM in 2024. This number is expected to grow steadily over the forecast period (2025–2034), with a projected CAGR. The current myasthenia gravis therapeutics market mainly consists of symptomatic treatments such as acetylcholinesterase inhibitors like Mestinon. However, achieving full clinical remission with symptomatic therapy alone is challenging. As a result, immunosuppressive drugs are frequently introduced. First-line immunotherapy typically involves high-dose oral corticosteroids such as prednisone or prednisolone, which can induce a rapid response within 2 to 4 weeks. To reduce reliance on steroids and improve long-term disease control, nonsteroidal immunosuppressants (NSISTs) are often used. These include antimetabolites (e.g., azathioprine, mycophenolate mofetil, methotrexate, and cyclophosphamide) and calcineurin inhibitors (e.g., tacrolimus and cyclosporine). While NSISTs may be used as standalone treatments, they usually take 6 to 9 months to produce noticeable effects. Immunomodulatory therapies, including intravenous immunoglobulin (IVIg) and plasmapheresis (PLEX), are typically reserved for acute exacerbations or myasthenic crises. They are also employed as chronic treatments in patients who cannot tolerate or do not respond to standard immunosuppressants. Although traditional immunosuppressive strategies can help manage symptoms, achieving long-term, stable remission remains difficult. Additionally, about 15% of patients are considered treatment-refractory, meaning they either fail to respond to or cannot tolerate multiple immunosuppressive options. These patients often face the dual challenge of persistent symptoms and the adverse effects of long-term immunosuppression. Learn more about the myasthenia gravis disease market @ Myasthenia Gravis Treatment Medications The myasthenia gravis treatment market is well-established, with multiple approved drugs for myasthenia gravis, including SOLIRIS, ULTOMIRIS, RYSTIGGO, ZILBRYSQ, and VYVGART, among others. Alexion Pharmaceuticals' SOLIRIS is a monoclonal antibody that targets and inhibits complement protein C5, thereby blocking the formation of the terminal complement complex. This action helps reduce complement-driven hemolysis in PNH and thrombotic microangiopathy in aHUS. Although its exact mechanism in gMG and NMOSD is not fully known, it is believed to decrease complement complex accumulation. Between 2017 and 2023, SOLIRIS gained regulatory approvals in Japan, the US, and the EU for treating gMG, including pediatric indications in Japan. ULTOMIRIS (ravulizumab), also from Alexion Pharmaceuticals, is the first long-acting C5 inhibitor, offering rapid, complete, and sustained suppression of complement activity. It binds to C5, preventing its cleavage and subsequent formation of the membrane attack complex (C5b-9). ULTOMIRIS is effective in managing terminal complement-mediated hemolysis in PNH and thrombotic microangiopathy in aHUS. Although the precise mechanism in gMG and NMOSD remains unclear, it is thought to reduce complement deposition at the neuromuscular junction and block aquaporin-4 antibody-mediated complement activation. It received approvals from the US FDA, EMA, and Japan's PMDA in 2022. Get an in-depth assessment on generalized myasthenia gravis medication for adults @ ULTOMIRIS vs SOLIRIS for Myasthenia Gravis UCB Biopharma's RYSTIGGO is a subcutaneously administered, humanized monoclonal antibody that binds with high affinity to the human neonatal Fc receptor (FcRn). It received regulatory approval from the US FDA and Japan's PMDA in 2023, followed by the EC in January 2024. ZILBRYSQ, also developed by UCB Biopharma, is the first once-daily subcutaneous peptide-based inhibitor specifically targeting complement protein C5. It works by blocking C5 cleavage and the formation of the terminal complement complex C5b-9. Although its precise action in gMG remains uncertain, it is thought to limit C5b-9 accumulation at the neuromuscular junction. ZILBRYSQ gained approval from the US FDA, EMA, and PMDA in 2023. VYVGART, from Argenx, is a human IgG1 antibody fragment that targets FcRn, leading to a decrease in circulating IgG autoantibodies. It is the first FcRn blocker to receive regulatory approval. Argenx's VYVGART HYTRULO (also marketed as VYVDURA) combines efgartigimod alfa, an FcRn inhibitor, with hyaluronidase, an endoglycosidase, for treating adults with generalized myasthenia gravis. This formulation was approved by the US FDA and EMA in 2023 and by the PMDA in January 2024. Uncover the mechanism of FcRn inhibitor myasthenia gravis medication @ Myasthenia Gravis MoA On April 30, 2025, the FDA approved Johnson & Johnson's nipocalimab, branded as IMAAVY, as a new therapy for gMG. This approval puts IMAAVY among the list of approved drugs for myasthenia gravis treatment. The approval, which J&J says encompasses the widest eligible patient population with gMG, includes individuals aged 12 and above who test positive for AChR or anti-muscle-specific kinase (MuSK) antibodies. IMAAVY functions by inhibiting the FcRn protein, which plays a role in maintaining circulating IgG antibodies, key drivers in many autoimmune disorders. By blocking FcRn, IMAAVY significantly reduces harmful IgG autoantibodies while preserving the body's overall immune response, according to clinical data. J&J sees broader potential for IMAAVY beyond gMG, believing its mechanism of action could apply across multiple autoimmune conditions due to IgG's involvement in various diseases. The FDA's decision followed results from the ongoing Phase III Vivacity-MG3 trial, which evaluates IMAAVY in combination with standard care versus placebo and standard care in 199 adult gMG patients, including 153 antibody-positive individuals. Additionally, J&J is conducting a Phase II/III pediatric trial called Vibrance, where IMAAVY, combined with standard care, achieved its primary goal by reducing total serum IgG levels by 69% over 24 weeks. J&J acquired IMAAVY through its USD 6.5 billion acquisition of Momenta Pharmaceuticals in 2020, with the FcRn inhibitor myasthenia gravis serving as the centerpiece of that deal. The company is aiming for blockbuster status, forecasting peak annual sales of over USD 5 billion for the myasthenia gravis medication. Dive deep into the myasthenia gravis treatment cost @ Generalized Myasthenia Gravis Drug with Copay Myasthenia gravis pipeline possesses some drugs in mid- and late-stage development to be approved in the near future. The expected launch of myasthenia gravis treatment medications, such as Batoclimab (Immunovant Sciences GmbH), Descartes-08 (Cartesian Therapeutics), and others, are expected to further create a positive impact on the myasthenia gravis disease market. Discover which therapies are expected to grab major myasthenia gravis therapeutics market share @ Market Analysis on Myasthenia Gravis Batoclimab is a fully humanized monoclonal antibody designed to inhibit neonatal Fc receptors by blocking the interaction between FcRn and IgG, thereby promoting the breakdown of autoantibodies. It has received Orphan Drug Designation (ODD) from both the US FDA and the EMA. In March 2025, Immunovant announced topline results from its Phase III trial evaluating batoclimab in patients with myasthenia gravis. Descartes-08 represents the first RNA-engineered CAR T-cell (rCAR-T) therapy developed for autoimmune conditions. This therapy uses cytotoxic T-cells programmed to target and eliminate pathogenic plasma cells that produce autoantibodies. Created from a patient's own blood, Descartes-08 has also received ODD from the US FDA for treating myasthenia gravis. In December 2024, Cartesian Therapeutics shared encouraging updated findings from its Phase IIb study of Descartes-08 in myasthenia gravis. Furthermore, in January 2025, the FDA agreed to the company's Phase III AURORA trial design under a Special Protocol Assessment, with trial initiation planned for the first half of 2025. Curious about what the new myasthenia gravis treatments are in development? Visit Myasthenia Gravis Clinical Trials The anticipated launch of these emerging myasthenia gravis treatments are poised to transform the market landscape in the coming years. As these cutting-edge therapies continue to mature and gain regulatory approval, they are expected to reshape the myasthenia gravis market landscape, offering new standards of care and unlocking opportunities for medical innovation and economic growth. DelveInsight estimates that the myasthenia gravis market size in the 7MM is expected to grow from USD 5.2 billion in 2024 at a significant CAGR by 2034. According to DelveInsight's analysis, the myasthenia gravis market growth is anticipated with the introduction of emerging therapies, leading to an expansion in the myasthenia gravis market size throughout the forecast period (2025–2034). This anticipated myasthenia gravis market growth is driven by advancements in treatment options, greater healthcare access, and a rising myasthenia gravis prevalence, which together foster higher demand for innovative and effective therapies. DelveInsight's latest published market report titled Myasthenia Gravis Market Insight, Epidemiology, and Market Forecast – 2034 will help you to discover which myasthenia gravis treatment market leader is going to capture the largest market share. The report provides comprehensive insights into the country-specific myasthenia gravis treatment guidelines, patient pool analysis, and epidemiology forecast to help understand the key opportunities and assess the market's underlying potential. The myasthenia gravis market report proffers epidemiological analysis for the study period 2020–2034 in the 7MM, segmented into: Total Diagnosed Prevalent Cases of Myasthenia Gravis Gender-specific Diagnosed Prevalent Cases of Myasthenia Gravis Age-specific Diagnosed Prevalent Cases of Myasthenia Gravis Diagnosed Prevalent Cases of Myasthenia Gravis by MGFA Classification Diagnosed Prevalent Cases of Generalized Myasthenia Gravis by Antibody Serology The report provides an edge while developing business strategies by understanding trends shaping and driving the 7MM myasthenia gravis market. Highlights include: 10-year Forecast 7MM Analysis Epidemiology-based Market Forecasting Historical and Forecasted Market Analysis upto 2034 Emerging Drug Market Uptake Peak Sales Analysis Key Cross Competition Analysis Industry Expert's Opinion Access and Reimbursement Download this myasthenia gravis market report to assess the epidemiology forecasts, understand the patient journeys, know KOLs' opinions about the upcoming treatment paradigms, and determine the factors contributing to the shift in the myasthenia gravis market. Also, stay abreast of the mitigating factors to improve your market position in the myasthenia gravis therapeutic space. Related Reports Myasthenia Gravis Epidemiology Forecast Myasthenia Gravis Epidemiology Forecast – 2034 report delivers an in-depth understanding of the disease, historical and forecasted myasthenia gravis epidemiology in the 7MM, i.e., the United States, EU5 (Germany, Spain, Italy, France, and the United Kingdom), and Japan. Myasthenia Gravis Pipeline Myasthenia Gravis Pipeline Insight – 2025 report provides comprehensive insights about the pipeline landscape, pipeline drug profiles, including clinical and non-clinical stage products, and the key myasthenia gravis companies, including Harbour BioMed (Guangzhou) Co. Ltd., Kyverna Therapeutics, Cabaletta Bio, Takeda, Hoffmann-La Roche, Immunovant Sciences GmbH, Regeneron Pharmaceuticals, Novartis Pharmaceuticals, Janssen Research & Development, LLC, Momenta Pharmaceuticals, Inc., Amgen, Dianthus Therapeutics, Cartesian Therapeutics, COUR Pharmaceutical Development Company, Inc., Alexion Pharmaceuticals, Inc., among others. Generalized Myasthenia Gravis Market Generalized Myasthenia Gravis Market Insights, Epidemiology, and Market Forecast – 2034 report deliver an in-depth understanding of the disease, historical and forecasted epidemiology, as well as the market trends, market drivers, market barriers, and key gMG companies including Alexion Pharmaceuticals, Argenx, UCB Biopharma, Argenx-Halozyme Therapeutics, Horizon Therapeutics, Hoffmann-La Roche, Janssen Research & Development, LLC, Immunovant Sciences GmbH, Bristol Myers Squibb, Biogen Inc., Pfizer Inc., Novartis AG, Sanofi S.A., Roche Holding AG, Johnson & Johnson, Takeda Pharmaceutical Company Limited, AbbVie Inc., Eli Lilly and Company, Merck & Co., Inc., GlaxoSmithKline plc, AstraZeneca plc, Amgen Inc., Boehringer Ingelheim International GmbH, Genentech, Inc., Gilead Sciences, Inc., Celgene Corporation, Vertex Pharmaceuticals Incorporated , among others. Generalized Myasthenia Gravis Pipeline Generalized Myasthenia Gravis Pipeline Insight – 2025 report provides comprehensive insights about the pipeline landscape, pipeline drug profiles, including clinical and non-clinical stage products, and the key gMG companies, including Biocon, Cartesian Therapeutics, UCB, Momenta Pharmaceuticals, HanAll Biopharma, Roche, Alexion, Novartis, Takeda, BioMarin, among others. About DelveInsight DelveInsight is a leading Business Consultant and Market Research firm focused exclusively on life sciences. It supports pharma companies by providing comprehensive end-to-end solutions to improve their performance. Get hassle-free access to all the healthcare and pharma market research reports through our subscription-based platform PharmDelve . Contact Us Shruti Thakur [email protected] +14699457679 Logo: SOURCE DelveInsight Business Research, LLP WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED

ImmunotherapyPhase 3Drug ApprovalOrphan DrugClinical Result

08 May 2025

·ir.zailaboratory.com

Zai Lab Announces First Quarter 2025 Financial Results and Recent Corporate Updates

– Total revenues grew 22% y-o-y to $106.5 million for the first quarter of 2025; reaffirming full-year 2025 revenue guidance of $560 million to $590 million – Operating loss improved significantly, declining 20% year-over-year to $56.3 million for the first quarter of 2025, and 25% to $37.1 million on an adjusted basis1; on track to achieve profitability1 in the fourth quarter of 2025 – ZL-1310 (DLL3 ADC) is advancing rapidly, with upcoming ASCO 2025 data presentation in ES-SCLC; initiation of registrational study in ES-SCLC expected in the second half of 2025 – AACR 2025 presentations of ZL-6201 (LRRC15 ADC) and ZL-1222 (PD-1/IL-12) underscore the promising potential of Zai Lab’s internally developed next-generation oncology therapies – Strong balance sheet with a cash position2 of $857.3 million as of March 31, 2025 , compared to $879.7 million as of December 31, 2024 Conference call and webcast today, May 8, 2025 , at 8:00 a.m. ET ( 8:00 p.m. HKT) SHANGHAI & CAMBRIDGE, Mass. --(BUSINESS WIRE)--May 8, 2025-- Zai Lab Limited (NASDAQ: ZLAB; HKEX: 9688) today announced financial results for the first quarter of 2025, along with recent product highlights and corporate updates. “In the first quarter, we continued to advance both our global pipeline and commercial business,” said Dr. Samantha Du , Founder, Chairperson, and CEO of Zai Lab . “We are rapidly expanding our global portfolio, having recently presented promising data for two next-generation oncology therapies at AACR, and we look forward to presenting updated results for ZL-1310 (DLL3 ADC) at the 2025 ASCO Annual Meeting. We remain on track to initiate a pivotal study for ZL-1310 in SCLC this year, with the goal of securing FDA approval in 2027. In parallel, we are also exploring opportunities in first-line SCLC and other neuroendocrine tumors to unlock the full potential of this important global asset. On the commercial front, we continued to expand patient access for key products and are leveraging our existing infrastructure to support upcoming launches and our next wave of blockbuster opportunities. With a strong foundation in place, we are well positioned to drive growth and profitability, and to further our mission of becoming a leading global biopharmaceutical company.” “2025 marks a transformational year for Zai Lab , and we are executing against the key objectives we set at the start of the year,” said Josh Smiley , President and COO of Zai Lab . “Following a seasonal slowdown of VYVGART early in the year, we saw patient volumes rebound in March and April, and we anticipate a return to strong sequential growth throughout the rest of the year. Looking ahead, our late-stage pipeline, including bemarituzumab and KarXT, is expected to fuel the next wave of topline growth alongside VYVGART. At the same time, we continue to strengthen our financial position, achieving a 20% year-over-year reduction in operating loss and a 25% year-over-year reduction in adjusted operating loss1, keeping us on track to achieve profitability1 in the fourth quarter of 2025. With a strong cash position,2 a growing commercial business and an expanding global portfolio, Zai Lab is poised to capitalize on multiple upcoming catalysts and drive long-term shareholder value.” 1 Refers to adjusted income (loss) from operations (non-GAAP), calculated as GAAP income (loss) from operations adjusted to exclude certain non-cash expenses, including depreciation, amortization, and share-based compensation. For additional information on this adjusted profitability measure, refer to the “Non-GAAP Measures” section. 2 Cash position includes cash and cash equivalents, current restricted cash, and short-term investments. First Quarter 2025 Financial Results Product revenue, net was $105.7 million in the first quarter of 2025, compared to $87.1 million for the same period in 2024, representing 21% y-o-y growth, 23% y-o-y growth at constant exchange rate (CER). This increase was primarily driven by increased sales for VYVGART, ZEJULA, and NUZYRA. VYVGART and VYVGART Hytrulo were $18.1 million in the first quarter of 2025, compared to $13.2 million for the same period in 2024. Although quarter over quarter growth was impacted by seasonality, sales grew year over year driven by increasing market coverage and penetration since VYVGART’s launch in September 2023 and listing on China’s National Reimbursement Drug List (NRDL) for the treatment of generalized Myasthenia Gravis (gMG) effective January 1, 2024 . ZEJULA was $49.5 million in the first quarter of 2025, compared to $45.5 million for the same period in 2024. ZEJULA sales remained strong as it continued to be the leading PARP inhibitor in hospital sales for ovarian cancer in mainland China . NUZYRA was $15.1 million in the first quarter of 2025, compared to $9.9 million for the same period in 2024. This growth was supported by increasing market coverage and penetration. VYVGART and VYVGART Hytrulo were $18.1 million in the first quarter of 2025, compared to $13.2 million for the same period in 2024. Although quarter over quarter growth was impacted by seasonality, sales grew year over year driven by increasing market coverage and penetration since VYVGART’s launch in September 2023 and listing on China’s National Reimbursement Drug List (NRDL) for the treatment of generalized Myasthenia Gravis (gMG) effective January 1, 2024 . ZEJULA was $49.5 million in the first quarter of 2025, compared to $45.5 million for the same period in 2024. ZEJULA sales remained strong as it continued to be the leading PARP inhibitor in hospital sales for ovarian cancer in mainland China . NUZYRA was $15.1 million in the first quarter of 2025, compared to $9.9 million for the same period in 2024. This growth was supported by increasing market coverage and penetration. Research and Development (R&D) expenses were $60.7 million in the first quarter of 2025, compared to $54.6 million for the same period in 2024. This increase was primarily due to upfront fees totaling $20.0 million for our license and collaboration agreements. Other R&D expenses decreased as a result of resource prioritization and efficiency efforts. Selling, General and Administrative expenses were $63.4 million in the first quarter of 2025, compared to $69.2 million for the same period in 2024. This decrease was primarily driven by decreased personnel costs as a result of resource prioritization and efficiency efforts. Loss from operations was $56.3 million in the first quarter of 2025, $37.1 million when adjusted to exclude non-cash expenses including depreciation, amortization, and share-based compensation. A reconciliation of loss from operations (GAAP) to adjusted loss from operations (non-GAAP) is included at the end of this release. Net loss was $48.4 million in the first quarter of 2025, or a loss per ordinary share attributable to common stockholders of $0.04 (or loss per American Deposit Share (ADS) of $0.45 ), compared to a net loss of $53.5 million for the same period in 2024, or a loss per ordinary share of $0.05 (or loss per ADS of $0.55 ). These decreases in net loss were primarily due to product revenue growing faster than net operating expenses. Cash and cash equivalents, short-term investments, and current restricted cash totaled $857.3 million as of March 31, 2025 , compared to $879.7 million as of December 31, 2024 . Recent Pipeline Highlights Below are key product updates since our last earnings release: Oncology Pipeline ZL-1310 (DLL3 ADC): Second-Line+ Extensive-Stage SCLC (ES-SCLC): In April 2025 , Zai Lab announced that updated data from an ongoing, global Phase 1a/1b clinical trial of ZL-1310 for the treatment of ES-SCLC, will be presented during a poster session at the 2025 American Society of Clinical Oncology (ASCO) Annual Meeting. The updated results will include additional patients and follow-up from the ongoing trial. Other neuroendocrine tumors: In April 2025 , Zai Lab initiated a global Phase 1/2 study in patients with selected solid tumors, exploring its therapeutic potential beyond ES-SCLC. Second-Line+ Extensive-Stage SCLC (ES-SCLC): In April 2025 , Zai Lab announced that updated data from an ongoing, global Phase 1a/1b clinical trial of ZL-1310 for the treatment of ES-SCLC, will be presented during a poster session at the 2025 American Society of Clinical Oncology (ASCO) Annual Meeting. The updated results will include additional patients and follow-up from the ongoing trial. Other neuroendocrine tumors: In April 2025 , Zai Lab initiated a global Phase 1/2 study in patients with selected solid tumors, exploring its therapeutic potential beyond ES-SCLC. Tisotumab Vedotin (TIVDAK, Tissue Factor ADC): In March 2025 , China’s National Medical Products Administration (NMPA) accepted the Biologics License Application (BLA) for TIVDAK for the treatment of patients with recurrent or metastatic cervical cancer with disease progression on or after systemic therapy. Zai Lab will leverage its commercial footprint of ZEJULA in women’s cancer to accelerate patient access to this therapy in China if approved. Tumor Treating Fields (TTFields): In April 2025 , Zai Lab partner Novocure announced that the additional results from the Phase 3 PANOVA-3 trial for pancreatic cancer will be presented as a late-breaking oral presentation at the 2025 ASCO Annual Meeting. Zai Lab participated in the study in Greater China (mainland China , Hong Kong , Macau and Taiwan , collectively) and plans to file for regulatory approval in China in 2025. Repotrectinib (ROS1/TRK): In April 2025 , China’s NMPA accepted the supplemental New Drug Application for repotrectinib for patients with NTRK-positive solid tumors. Repotrectinib has the potential to become a next-generation TKI that can be used across a broad range of NTRK fusion-positive solid tumors for both TKI-naïve and TKI-pretreated patients. ZL-6201 (LRRC15 ADC): In April 2025 , Zai Lab presented new data at the American Association for Cancer Research (AACR) Annual Meeting 2025. The findings demonstrate that ZL-6201 efficiently internalizes within and kills tumor cells, while also exhibiting a strong bystander killing effect in the tumor microenvironment where the target is often expressed. Based on these findings, Zai Lab plans to initiate Investigational New Drug (IND)-enabling studies of ZL-6201 as a potential treatment for patients with sarcoma and other LRRC15-positive solid tumors, such as breast cancer and other malignancies, in 2025. ZL-1222 (PD-1/IL-12): In April 2025 , Zai Lab presented data at the AACR Annual Meeting 2025, marking the first public disclosure of this global asset. Findings from preclinical studies demonstrate its potent anti-tumor activity in both anti-PD-1 sensitive and resistant tumor models, with improved systemic safety. These results indicate its potential to benefit patients who are unresponsive or resistant to the current immuno-oncology therapies. Immunology Pipeline Efgartigimod (FcRn): In April 2025 , Zai Lab partner argenx announced the U.S. Food and Drug Administration (FDA) approved VYVGART Hytrulo prefilled syringe (PFS) for self-injection in gMG and Chronic Inflammatory Demyelinating Polyneuropathy (CIDP). It is the third administration option providing additional flexibility and convenience for patients. Zai Lab plans to submit the Chemical Manufacturing and Control (CMC) variation for PFS for these indications in China in 2025. ZL-1102 (IL-17 Humabody®): Zai Lab has decided to discontinue the global Phase 2 clinical trial of ZL-1102 following a comprehensive review of the data from interim analysis from the first 40 enrolled participants and the subsequent recommendation of the independent Data and Safety Monitoring Board. Povetacicept (APRIL/BAFF): Zai Lab partner Vertex has completed enrollment of the interim analysis cohort in the global Phase 3 RAINIER study of povetacicept in IgA nephropathy. Zai Lab participated in the study in Greater China . Anticipated Major Milestones in 2025 Upcoming Potential NMPA Submissions Bemarituzumab (FGFR2b): BLA submission in first-line gastric cancer. Tumor Treating Fields (TTFields): Marketing Authorization Application submissions in first-line pancreatic cancer. Efgartigimod (FcRn): submission for the CMC variation for PFS in gMG and CIDP. Expected Clinical Developments and Data Readouts Global Pipeline ZL-1310 (DLL3 ADC) Second-Line+ ES-SCLC: Zai Lab to present updated data at the 2025 ASCO Annual Meeting on June 2, 2025 . Zai Lab plans to initiate a pivotal study in the second half of 2025. First-Line ES-SCLC: Zai Lab to provide a data readout for dose escalation of ZL-1310 doublet in combination with atezolizumab. ZL-1503 (IL-13/IL-31R) Zai Lab to provide a preclinical data update and advance into a global Phase 1 study in moderate-to-severe atopic dermatitis. ZL-6201 (LRRC15 ADC) Zai Lab to advance into global Phase 1 development for patients with sarcoma and potentially other LRRC15-positive solid tumors, such as breast cancer and other malignancies. Regional Pipeline Bemarituzumab (FGFR2b) Zai Lab partner Amgen to provide data readout from the Phase 3 FORTITUDE-101 study of bemarituzumab combined with chemotherapy versus chemotherapy alone in first-line gastric cancer in the second quarter of 2025. Zai Lab participated in the study in Greater China . Zai Lab partner Amgen to provide data readout from the Phase 3 FORTITUDE-102 study of bemarituzumab plus chemotherapy and nivolumab versus chemotherapy and nivolumab in first-line gastric cancer in the second half of 2025. Zai Lab participated in the study in Greater China . Xanomeline-Trospium (or KarXT) (M1/M4-agonist) Zai Lab partner Bristol Myers Squibb (BMS) to provide data readout from the Phase 3 ADEPT-2 study of KarXT in Alzheimer's Disease Psychosis in the second half of 2025. Zai Lab participated in the study in Greater China . Efgartigimod (FcRn) Seronegative gMG: Zai Lab partner argenx to provide topline results from the Phase 3 ADAPT-SERON study in seronegative gMG. Zai Lab participated in the study in Greater China . Lupus Nephritis (LN): Zai Lab to provide topline results from the Phase 2 study in LN. Povetacicept (APRIL/BAFF) Primary Membranous Nephropathy (pMN): Zai Lab plans to partner with Vertex to execute the global pivotal (Phase 2/3) study of povetacicept in pMN in Greater China . Conference Call and Webcast Information Zai Lab will host a live conference call and webcast today, May 8, 2025 , at 8:00 a.m. ET ( 8:00 p.m. HKT). Listeners may access the live webcast by visiting the Company’s website at http://ir.zailaboratory.com. Participants must register in advance of the conference call. Details of registration links are as follows: For webcast: https://edge.media-server.com/mmc/p/pwq4a9of For dial-in: https://register-conf.media-server.com/register/BIb40d2ed331c84e39982d7fe2b6ed496f All participants must use the link provided above to complete the online registration process in advance of the conference call. Dial-in details will be in the confirmation email which the participant will receive upon registering. A replay will be available shortly after the call and can be accessed by visiting the Company’s website. About Zai Lab Zai Lab Limited (NASDAQ: ZLAB; HKEX: 9688) is an innovative, research-based, commercial-stage biopharmaceutical company based in China and the United States . We are focused on discovering, developing, and commercializing innovative products that address medical conditions with significant unmet needs in the areas of oncology, immunology, neuroscience, and infectious disease. Our goal is to leverage our competencies and resources to positively impact human health worldwide. For additional information about Zai Lab , please visit www.zailaboratory.com or follow us at https://x.com/ZaiLab_Global. Non-GAAP Measures In addition to results presented in accordance with GAAP, we disclose growth rates that have been adjusted to exclude the impact of changes due to the translation of foreign currencies into U.S. dollars. We have also presented a measure of adjusted loss from operations that adjusts GAAP loss from operations to exclude the impact of certain non-cash expenses including depreciation, amortization, and share-based compensation, which we refer to as “profitability.” These adjusted growth rates and adjusted loss from operations are non-GAAP measures. We believe that these non-GAAP measures are important for an understanding of the performance of our business operations and financial results and provide investors with an additional perspective on operational trends and greater transparency into our historical and projected operating performance. Although we believe the non-GAAP financial measures enhance investors’ understanding of our business and performance, these non-GAAP financial measures should not be considered an exclusive alternative to accompanying GAAP financial measures. Zai Lab Forward-Looking Statements This press release contains certain forward-looking statements, including statements relating to our strategy and plans; potential of and expectations for our business, commercial products, and pipeline programs; our goals, objectives, and priorities and our expectations under our growth strategy (including our expectations regarding our commercial products and launches, clinical stage products, revenue growth, profitability, and cash flow); clinical development programs and related clinical trials; clinical trial data, data readouts, and presentations; risks and uncertainties associated with drug development and commercialization; regulatory discussions, submissions, filings, and approvals and the timing thereof; the potential benefits, safety, and efficacy of our products and product candidates and those of our collaboration partners; the anticipated benefits and potential of investments, collaborations, and business development activities; our profitability and timeline to profitability; our future financial and operating results; and financial guidance, including with respect to our planned sources and uses of cash and our expected path to profitability. All statements, other than statements of historical fact, included in this press release are forward-looking statements, and can be identified by words such as “aim,” “anticipate,” “believe,” “could,” “estimate,” “expect,” “forecast,” “goal,” “intend,” “may,” “plan,” “poised,” “positioned,” “possible,” “potential,” “will,” “would,” and other similar expressions. Such statements constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are not guarantees or assurances of future performance. Forward-looking statements are based on our expectations and assumptions as of the date of this press release and are subject to inherent uncertainties, risks, and changes in circumstances that may differ materially from those contemplated by the forward-looking statements. We may not actually achieve the plans, carry out the intentions, or meet the expectations or projections disclosed in our forward-looking statements, and you should not place undue reliance on these forward-looking statements. Actual results may differ materially from those indicated by such forward-looking statements as a result of various important factors, including but not limited to (1) our ability to successfully commercialize and generate revenue from our approved products; (2) our ability to obtain funding for our operations and business initiatives; (3) the results of our clinical and pre-clinical development of our product candidates; (4) the content and timing of decisions made by the relevant regulatory authorities regarding regulatory approvals of our product candidates; (5) risks related to doing business in China ; and (6) other factors identified in our most recent annual and quarterly reports and in other reports we have filed with the U.S. Securities and Exchange Commission (SEC). We anticipate that subsequent events and developments will cause our expectations and assumptions to change, and we undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as may be required by law. These forward-looking statements should not be relied upon as representing our views as of any date subsequent to the date of this press release. Our SEC filings can be found on our website at www.zailaboratory.com and on the SEC’s website at www.SEC.gov. Zai Lab Limited Unaudited Condensed Consolidated Balance Sheets (in thousands of U.S. dollars ($), except for number of shares and per share data) March 31 , 2025 December 31 , 2024 Assets Current assets Cash and cash equivalents 757,263 449,667 Restricted cash, current 100,000 100,000 Short-term investments — 330,000 Accounts receivable (net of allowance for credit losses of $22 and $25 as of March 31, 2025 and December 31, 2024 , respectively) 76,555 85,178 Notes receivable 11,118 4,233 Inventories, net 53,054 39,875 Prepayments and other current assets 43,878 41,527 Total current assets 1,041,868 1,050,480 Restricted cash, non-current 1,113 1,114 Property and equipment, net 49,654 47,961 Operating lease right-of-use assets 19,081 21,496 Land use rights, net 2,882 2,907 Intangible assets, net 56,198 56,027 Other non-current assets 2,534 5,768 Total assets 1,173,330 1,185,753 Liabilities and shareholders’ equity Current liabilities Accounts payable 103,017 100,906 Current operating lease liabilities 6,574 8,048 Short-term debt 173,405 131,711 Other current liabilities 36,811 58,720 Total current liabilities 319,807 299,385 Deferred income 30,126 31,433 Non-current operating lease liabilities 12,319 13,712 Other non-current liabilities 325 325 Total liabilities 362,577 344,855 Commitments and contingencies Shareholders’ equity Ordinary shares (par value of $0.000006 per share; 5,000,000,000 shares authorized; 1,089,076,400 and 1,082,614,740 shares issued as of March 31, 2025 and December 31, 2024 , respectively; 1,084,164,200 and 1,077,702,540 shares outstanding as of March 31, 2025 and December 31, 2024 , respectively) 7 7 Additional paid-in capital 3,283,800 3,264,295 Accumulated deficit (2,501,521 ) (2,453,083 ) Accumulated other comprehensive income 49,303 50,515 Treasury Stock (at cost, 4,912,200 shares as of both March 31, 2025 and December 31, 2024 ) (20,836 ) (20,836 ) Total shareholders’ equity 810,753 840,898 Total liabilities and shareholders’ equity 1,173,330 1,185,753 Zai Lab Limited Unaudited Condensed Consolidated Statements of Operations (in thousands of $, except for number of shares and per share data) Three Months Ended March 31 , 2025 2024 Revenues Product revenue, net 105,650 87,149 Collaboration revenue 837 — Total revenues 106,487 87,149 Expenses Cost of product revenue (38,452 ) (33,619 ) Cost of collaboration revenue (195 ) — Research and development (60,729 ) (54,645 ) Selling, general, and administrative (63,422 ) (69,194 ) Loss from operations (56,311 ) (70,309 ) Interest income 8,606 9,658 Interest expenses (1,187 ) (113 ) Foreign currency gains (losses) 651 (2,068 ) Other (expense) income, net (197 ) 9,361 Loss before income tax (48,438 ) (53,471 ) Income tax expense — — Net loss (48,438 ) (53,471 ) Loss per share - basic and diluted (0.04 ) (0.05 ) Weighted-average shares used in calculating net loss per ordinary share - basic and diluted 1,080,825,300 973,145,760 Zai Lab Limited Unaudited Condensed Consolidated Statements of Comprehensive Loss (in thousands of $) Three Months Ended March 31 , 2025 2024 Net loss (48,438 ) (53,471 ) Other comprehensive income, net of tax of nil: Foreign currency translation adjustments (1,212 ) 1,542 Comprehensive loss (49,650 ) (51,929 ) Zai Lab Limited Non-GAAP Measures (unaudited) ($ in thousands) Growth on a Constant Exchange Rate (CER) Basis Three Months Ended March 31 , Year over Year % Growth 2025 2024 As reported At CER* Product revenue, net 105,650 87,149 21 % 23 % Loss from operations (56,311 ) (70,309 ) (20 )% (20 )% * The growth rates at CER were calculated assuming the same foreign currency exchange rates were in effect for the current and prior year period. Reconciliation of Loss from Operations (GAAP) to Adjusted Loss from Operations (Non-GAAP) Three Months Ended March 31 , 2025 2024 GAAP loss from operations (56,311 ) (70,309 ) Plus: Depreciation and amortization expenses 3,458 3,012 Plus: Share-based compensation 15,800 17,980 Adjusted loss from operations (37,053 ) (49,317 ) View source version on businesswire.com: https://www.businesswire.com/news/home/20250508272596/en/ Investor Relations: Christine Chiou / Lina Zhang +1 (917) 886-6929 / +86 136 8257 6943 christine.chiou1@zailaboratory.com / lina.zhang@zailaboratory.com Media: Shaun Maccoun / Xiaoyu Chen +1 (415) 317-7255 / +86 185 0015 5011 shaun.maccoun@zailaboratory.com / xiaoyu.chen@zailaboratory.com Source: Zai Lab Limited

Phase 1Phase 2ASCOFinancial StatementPhase 3

06 May 2025

·www.prnewswire.com

HALOZYME RAISES 2025 FINANCIAL GUIDANCE RANGES AND REPORTS STRONG FIRST QUARTER 2025 RESULTS

Announcing New $250M Share Repurchase Total Revenue Increased 35% YOY to $265 million and Royalty Revenue Increased 39% YOY to $168 million Net Income Increased 54% YOY to $118 million; Adjusted EBITDA Increased 40% YOY to $162 million; GAAP Diluted EPS Increased 55% YOY to $0.93; non-GAAP Diluted EPS Increased 41% YOY to $1.111 Raising 2025 Financial Guidance Ranges for Total Revenue to $1,200 - $1,280 million, Representing YOY Growth of 18% - 26%, Adjusted EBITDA to $790 - $840 million, Representing YOY Growth of 25% - 33% and non-GAAP Diluted EPS to $5.30 - $5.70, Representing YOY Growth of 25% - 35%1 SAN DIEGO, May 6, 2025 /PRNewswire/ -- Halozyme Therapeutics, Inc. (NASDAQ: HALO) ("Halozyme" or the "Company") today reported its financial and operating results for the first quarter ended March 31, 2025, provided an update on its recent corporate activities and raised its 2025 financial guidance. "2025 is off to a strong start with our current three blockbuster brands, Darzalex SC, Phesgo and VYVGART Hytrulo, continuing to demonstrate strong growth in their currently approved indications. Our four recently launched products, Ocrevus Zunovo in U.S. and Europe, Tecentriq Hybreza in U.S. and Europe, Opdivo Qvantig in U.S. and Rybrevant SC in Europe are just beginning their contributions as our partners focus on gaining and expanding coverage and reimbursement. This broadened portfolio is resulting in an unprecedented set of 11 additional growth catalysts that have happened recently or are expected to happen in the coming months. These opportunities include multiple new European and U.S. product approvals, multiple new indication approvals and multiple key reimbursement milestones supporting access for an even greater number of patients, all creating new near and longer-term growth opportunity. As a result of this momentum, I am pleased to announce we are increasing our full year 2025 financial guidance ranges and a new $250 million share buyback," said Dr. Helen Torley, president and chief executive officer, of Halozyme. "In addition, our long-term growth prospects have never been better with additional growth opportunities projected to result from our pipeline, where two products, BMS' nivolumab plus relatlimab SC and Takeda's 20% immune globulin SC, continue in Phase 3 and where ViiV and Acumen announced development progress and data in the quarter. I am also pleased to announce that we have signed our first HVAI development agreement with a current ENHANZE partner and that a different ENHANZE partner is now moving our SVAI into clinical testing," concluded Dr. Torley. First Quarter and Recent Corporate Highlights: On May 6, Halozyme announced a second $250 million share repurchase under the $750 million approved program from February 2024. In April 2025, Halozyme filed a patent infringement lawsuit against Merck Sharp & Dohme Corp. ("Merck") in the U.S. District Court in New Jersey alleging that Merck is using Halozyme's patented MDASE™ subcutaneous drug delivery technology to develop Subcutaneous ("SC") Keytruda. Halozyme is seeking damages and injunctive relief to stop Merck's infringement of Halozyme's MDASE™ intellectual property. In March 2025, Halozyme completed the first $250 million Accelerated Share Repurchase of its common stock under the $750 million approved program from February 2024. First Quarter and Recent Partner Highlights: In April 2025, Roche received a positive opinion from the European Medicines Agency's Committee for Medicinal Products for Human Use ("CHMP") recommending an update to the European Union ("EU") label for Phesgo® for human epidermal growth factor receptor 2 ("HER2")-positive breast cancer. Administration of Phesgo® outside of a clinical setting (such as in a person's home) by a healthcare professional will be possible, once safely established in a clinical setting. In April 2025, argenx received a positive opinion from the CHMP recommending European Commission approval of VYVGART® 1000mg (efgartigimod alfa) developed with ENHANZE® for SC injection as a monotherapy for the treatment of adult patients with progressive or relapsing active chronic inflammatory demyelinating polyneuropathy ("CIDP") after prior treatment with corticosteroids or immunoglobulins. In April 2025, argenx received U.S. Food and Drug Administration ("FDA") approval of VYVGART® Hytrulo prefilled syringe for self-injection for the treatment of adult patients with generalized myasthenia gravis who are anti-acetylcholine receptor antibody positive and adult patients with CIDP. In April 2025, Janssen received European Commission marketing authorization of the SC formulation of RYBREVANT® (amivantamab) with ENHANZE®, in combination with LAZCLUZE® (lazertinib), for the first-line treatment of adult patients with advanced non-small cell lung cancer ("NSCLC") with epidermal growth factor receptor ("EGFR") exon 19 deletions or exon 21 L858R substitution mutations. Additionally, RYBREVANT® (amivantamab) is approved as a monotherapy for adult patients with advanced NSCLC with activating EGFR exon 20 insertion mutations after the failure of platinum-based therapy. This represents the 10th partner product with ENHANZE® to be commercialized. In April 2025, Janssen received European Commission approval for an indication extension of DARZALEX® SC in combination with bortezomib, lenalidomide, and dexamethasone for the treatment of adult patients with newly diagnosed multiple myeloma regardless of transplant eligibility. In March 2025, Bristol Myers Squibb received a positive CHMP opinion recommending approval of Opdivo® (nivolumab) with ENHANZE® across multiple solid tumor indications. In March 2025, Acumen announced top-line results from a Phase 1 study of sabirnetug (ACU193) with ENHANZE® comparing the pharmacokinetics between SC and intravenous administrations in healthy volunteers that demonstrated weekly SC administration of sabirnetug was well-tolerated with systematic exposure supporting further clinical development. In March 2025, ViiV announced results from a Phase 2b study demonstrated N6LS administered every four months SC with ENHANZE® in combination with cabotegravir successfully maintained viral suppression in adults living with HIV who were already stable on treatment. In March 2025, Takeda announced Health Canada expanded the marketing authorization for HYQVIA® to include CIDP as a maintenance therapy after stabilization with intravenous immunoglobulin to prevent relapse of neuromuscular disability and impairment in adults. First Quarter 2025 Financial Highlights: Revenue was $264.9 million, compared to $195.9 million in the first quarter of 2024. The 35% year-over-year increase was primarily driven by royalty revenue growth and an increase in sales of bulk rHuPH20. Revenue for the quarter included $168.2 million in royalties, an increase of 39% compared to $120.6 million in the first quarter of 2024, primarily attributable to increases in revenue of VYVGART® Hytrulo, DARZALEX® SC, and Phesgo®. Cost of sales was $48.4 million, compared to $28.3 million in the first quarter of 2024. The increase in cost of sales was primarily due to an increase in product sales. Amortization of intangibles expense remained flat at $17.8 million, compared to the first quarter of 2024. Research and development expense was $14.8 million, compared to $19.1 million in the first quarter of 2024. The decrease in research and development expense was primarily due to lower compensation expense driven by resource optimization and labor allocation initiatives, and timing of planned investments in ENHANZE® related to the development of our new high-yield rHuPH20 manufacturing process. Selling, general and administrative expense was $42.4 million, compared to $35.1 million in the first quarter of 2024. The increase was primarily due to an increase in consulting and professional service fees and compensation expense. Operating income was $141.5 million, compared to $95.5 million in the first quarter of 2024. Net income was $118.1 million, compared to $76.8 million in the first quarter of 2024. EBITDA and Adjusted EBITDA were $162.0 million, compared to $115.7 million in the first quarter of 2024.1 GAAP diluted earnings per share was $0.93, compared to $0.60 in the first quarter of 2024. Non-GAAP diluted earnings per share was $1.11, compared to $0.79 in the first quarter of 2024.1 Cash, cash equivalents and marketable securities were $747.9 million on March 31, 2025, compared to $596.1 million on December 31, 2024. The increase was primarily a result of cash generated from operations. Financial Outlook for 2025 The Company is raising its financial guidance for 2025. Note that the guidance reflects tariffs that are currently implemented. For the full year 2025, the Company expects: Total revenue of $1,200 million to $1,280 million, representing growth of 18% to 26% over 2024 total revenue, primarily driven by increases in royalty revenue. Revenue from royalties of $750 million to $785 million, representing growth of 31% to 37% over 2024. Adjusted EBITDA of $790 million to $840 million, representing growth of 25% to 33% over 2024. Non-GAAP diluted earnings per share of $5.30 to $5.70, representing growth of 25% to 35% over 2024. The Company's earnings per share guidance does not consider the impact of potential future share repurchases. Webcast and Conference Call Halozyme will host its Quarterly Update Conference Call for the first quarter ended March 31, 2025 today, Tuesday, May 6, 2025, at 1:30 p.m. PT/4:30 p.m. ET. The conference call may be accessed live with pre-registration via link: . The call will also be webcast live through the "Investors" section of Halozyme's corporate website and a recording will be made available following the close of the call. To access the webcast and additional documents related to the call, please visit Halozyme.com. About Halozyme Halozyme is a biopharmaceutical company advancing disruptive solutions to improve patient experiences and outcomes for emerging and established therapies. As the innovators of ENHANZE® drug delivery technology with the proprietary enzyme rHuPH20, Halozyme's commercially-validated solution is used to facilitate the subcutaneous delivery of injected drugs and fluids, with the goal of improving the patient experience with rapid subcutaneous delivery and reduced treatment burden. Having touched one million patient lives in post-marketing use in ten commercialized products in at least one major region and across more than 100 global markets, Halozyme has licensed its ENHANZE® technology to leading pharmaceutical and biotechnology companies including Roche, Takeda, Pfizer, Janssen, AbbVie, Eli Lilly, Bristol-Myers Squibb, argenx, ViiV Healthcare, Chugai Pharmaceutical and Acumen Pharmaceuticals. Halozyme also develops, manufactures and commercializes, for itself or with partners, drug-device combination products using its advanced auto-injector technologies that are designed to provide commercial or functional advantages such as improved convenience, reliability and tolerability, and enhanced patient comfort and adherence. The Company has two commercial proprietary products, Hylenex® and XYOSTED®, partnered commercial products and ongoing product development programs with Teva Pharmaceuticals and McDermott Laboratories Limited, an affiliate of Viatris Inc. Halozyme is headquartered in San Diego, CA and has offices in Ewing, NJ and Minnetonka, MN. Minnetonka is also the site of its operations facility. For more information visit and connect with us on LinkedIn and Twitter. Note Regarding Use of Non-GAAP Financial Measures In addition to disclosing financial measures prepared in accordance with U.S. generally accepted accounting principles ("GAAP"), this press release and the accompanying tables contain certain non-GAAP financial measures. The Company reports earnings before interest, taxes, depreciation, and amortization ("EBITDA"), adjusted EBITDA, Non-GAAP diluted earnings per share, Non-GAAP diluted shares, and guidance with respect to those measures, in addition to, and not as a substitute for, or superior to, financial measures calculated in accordance with GAAP. The Company calculates non-GAAP diluted earnings per share excluding share-based compensation expense, amortization of debt discounts, intangible asset amortization, one-time changes, if any, such as changes in contingent liabilities, inventory adjustments, impairment charges, and certain adjustments to income tax expense. The Company calculates non-GAAP diluted shares excluding the dilutive impact of convertible notes which is used in calculating non-GAAP diluted earnings. The Company calculates EBITDA excluding interest, taxes, depreciation and amortization. The Company calculates adjusted EBITDA excluding one-time items, if any, such as changes in contingent liabilities, inventory adjustments, impairment charges and transaction costs for business combinations. Reconciliations between GAAP and Non-GAAP financial measures are included at the end of this press release. The Company does not provide reconciliations of forward-looking adjusted measures to GAAP due to the inherent difficulty in forecasting and quantifying certain amounts that are necessary for such reconciliation, including adjustments that could be made for changes in share-based compensation expense and the effects of any discrete income tax items. For the same reasons, the Company is unable to address the probable significance of the unavailable information. The Company provides non-GAAP financial measures that it believes will be achieved; however, it cannot accurately predict all of the components of the adjusted calculations and the U.S. GAAP measures may be materially different than the non-GAAP measures. The Company evaluates other items of income and expense on an individual basis for potential inclusion in the calculation of Non-GAAP financial measures and considers both the quantitative and qualitative aspects of the item, including (i) its size and nature, (ii) whether or not it relates to the Company's ongoing business operations and (iii) whether or not the Company expects it to occur as part of the Company's normal business on a regular basis. Non-GAAP financial measures do not have any standardized meaning and are therefore unlikely to be comparable to similarly titled measures presented by other companies. These non-GAAP financial measures are not meant to be considered in isolation and should be read in conjunction with the Company's consolidated financial statements prepared in accordance with GAAP, and are not prepared under any comprehensive set of accounting rules or principles. In addition, from time to time in the future there may be other items that the Company may exclude for purposes of its non-GAAP financial measures, and the Company may in the future cease to exclude items that it has historically excluded for purposes of its non-GAAP financial measures. The Company considers these non-GAAP financial measures to be important because they provide useful measures of the operating performance of the Company, exclusive of factors that do not directly affect what the Company considers to be its core operating performance, as well as unusual events. The non-GAAP measures also allow investors and analysts to make additional comparisons of the operating activities of the Company's core business over time and with respect to other companies, as well as assessing trends and future expectations. The Company uses non-GAAP financial information in assessing what it believes is a meaningful and comparable set of financial performance measures to evaluate operating trends, as well as in establishing portions of our performance-based incentive compensation programs. Safe Harbor Statement In addition to historical information, the statements set forth in this press release include forward-looking statements including, without limitation, statements concerning the Company's financial performance (including the Company's expected financial outlook for 2025) and expectations for future growth, profitability, total revenue, royalty revenue, EBITDA, Adjusted EBITDA, and non-GAAP diluted earnings-per-share and potential share repurchases under its share repurchase program. Forward-looking statements regarding the Company's ENHANZE® drug delivery technology may include the possible benefits and attributes of ENHANZE®, its potential application to aid in the dispersion and absorption of other injected therapeutic drugs and facilitating more rapid delivery and administration of higher volumes of injectable medications through subcutaneous delivery and the expected expiration date of our ENHANZE® patent in Europe. Forward-looking statements regarding the Company's business may include potential growth and receipt of royalty and milestone payments driven by our partners' development and commercialization efforts, potential new clinical trial study starts and clinical data, regulatory submissions and product launches, the size and growth prospects of our partners' drug franchises, potential new or expanded collaborations (including potential HVAI and SVAI collaborations) and collaborative targets and regulatory review, and potential approvals of new partnered or proprietary products, and the potential timing of these events. These forward-looking statements are typically, but not always, identified through use of the words "expect," "believe," "enable," "may," "will," "could," "intends," "estimate," "anticipate," "plan," "predict," "probable," "potential," "possible," "should," "continue," and other words of similar meaning and involve risk and uncertainties that could cause actual results to differ materially from those in the forward-looking statements. Actual results could differ materially from the expectations contained in these forward-looking statements as a result of several factors, including unexpected levels of revenues, expenditures and costs, unexpected delays in the execution of the Company's share repurchase program, unexpected results or delays in the growth of the Company's business, or in the development, regulatory review or commercialization of the Company's partnered or proprietary products, regulatory approval requirements, uncertainties in tariffs and trade policies, unexpected adverse events or patient outcomes and competitive conditions. In addition, there can be no assurance as to developments related to the litigation referred to in this press release, the outcome of the litigation or any remedies that could be awarded in connection with the litigation. These and other factors that may result in differences are discussed in greater detail in the Company's most recent Annual Report on Form 10-K and Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission. Except as required by law, the Company undertakes no duty to update forward-looking statements to reflect events after the date of this release. Contacts: Tram Bui VP, Investor Relations and Corporate Communications 609-333-7668 [email protected] Samantha Gaspar Teneo 212-886-9356 [email protected] Footnotes: 1. Reconciliations between GAAP reported and non-GAAP financial information for actual results are provided at the end. SOURCE Halozyme Therapeutics, Inc. WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED

Clinical ResultDrug ApprovalPhase 2Phase 1Financial Statement

100 Deals associated with Efgartigimod Alfa

External Link

KEGG	Wiki	ATC	Drug Bank
-	Efgartigimod Alfa	-	DB15270

R&D Status

Approved

10 top approved records.

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Indication	Country/Location	Organization	Date
Purpura, Thrombocytopenic, Idiopathic	Japan	argenx SE	26 Mar 2024
Myasthenia Gravis	United States	arGENX BV	17 Dec 2021

Developing

10 top R&D records.

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Indication	Highest Phase	Country/Location	Organization	Date
Polyradiculoneuropathy, Chronic Inflammatory Demyelinating	NDA/BLA	China	Zai Lab (Shanghai) Co., Ltd.	24 Apr 2024
Primary Sjögren's syndrome	Phase 3	United States	argenx SE	04 Dec 2024
Graves Ophthalmopathy	Phase 3	United States	argenx SE	28 Mar 2024
Graves Ophthalmopathy	Phase 3	China	argenx SE	28 Mar 2024
Graves Ophthalmopathy	Phase 3	Japan	argenx SE	28 Mar 2024
Graves Ophthalmopathy	Phase 3	Austria	argenx SE	28 Mar 2024
Graves Ophthalmopathy	Phase 3	Bulgaria	argenx SE	28 Mar 2024
Graves Ophthalmopathy	Phase 3	France	argenx SE	28 Mar 2024
Graves Ophthalmopathy	Phase 3	Germany	argenx SE	28 Mar 2024
Graves Ophthalmopathy	Phase 3	Italy	argenx SE	28 Mar 2024

Clinical Result

Indication

Phase

Evaluation

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Study	Phase	Population	Analyzed Enrollment	Group	Results	Evaluation	Publication Date


NCT05633407 (POTS, CTgov)	Phase 2	Postural Orthostatic Tachycardia Syndrome \| Post Acute COVID 19 Syndrome	53	Efgartigimod (Efgartigimod)	ndqdfcgwuv(yzypftnkml) = puudqiqgwj zbgfbppurc (vbofrpsscp, 15.2541) View more	-	23 May 2025
				Placebo (Placebo)	ndqdfcgwuv(yzypftnkml) = skwqhawaaf zbgfbppurc (vbofrpsscp, 17.2963) View more
NCT04980495 (ADAPT NXT, Neurology \| AAN2025) Manual	Phase 3	Myasthenia Gravis	69	efgartigimod fixed-cycle(4 once-weekly infusions, 4 weeks between cycles) (Part A)	yhqfgevyol(osndaqqmqr) = vuspqkkfnr bqjvdsvzjw (tecdhnmrte, -6.5 to -3.8) View more	Positive	07 Apr 2025
				efgartigimod Q2W (Part A)	yhqfgevyol(osndaqqmqr) = djrulgcvkb bqjvdsvzjw (tecdhnmrte, -5.4 to -3.8) View more
ADAPT/ADAPT+ and ADAPT-SC/ADAPT-SC+ (AAN2025)	Not Applicable	Myasthenia Gravis AChR-Ab−	56	Efgartigimod IV	bekjgqzdhz(akdphmytlr) = pwronomrkr rwlbpahawg (hefsqksfpq ) View more	Positive	07 Apr 2025
NCT04188379 (ADVANCE \| ADVANCE IV, CTgov)	Phase 3	Purpura, Thrombocytopenic, Idiopathic	131	efgartigimod (Efgartigimod)	fiaxrqojny = jlctudgdop tuslcuxlyx (qrthbaxufp, irznfpabtp - ednsovvllh) View more	-	13 Mar 2025
				Placebo (Placebo)	fiaxrqojny = qoasyegdca tuslcuxlyx (qrthbaxufp, crzzjtkdym - bcmjyhhhjf) View more
NCT04687072 (ADVANCE SC, CTgov)	Phase 3	Purpura, Thrombocytopenic, Idiopathic	207	Efgartigimod PH20 SC (Efgartigimod PH20 SC)	nqxisejotr = kugemiiffp whbpcxjdhm (knuyomtupc, dwkqjfsxiu - pehkhnqfqt) View more	-	31 Oct 2024
				Placebo PH20 SC (Placebo PH20 SC)	nqxisejotr = wpbvtyekuj whbpcxjdhm (knuyomtupc, ajjodmhqgp - gtnnkfzyot) View more
NCT04281472 (ADHERE \| ADHERE+, CTgov)	Phase 2	Polyradiculoneuropathy, Chronic Inflammatory Demyelinating	322	Efgartigimod PH20 (Stage A: Efgartigimod PH20 SC)	nlcphuqayv = mrhosjwvtl zxpgpkydbx (zadfrkjbbm, jsmxyryrgp - pjgdaxkajb) View more	-	20 Aug 2024
				Efgartigimod PH20 (Stage B: Efgartigimod PH20 SC)	lkerojlskt(ntfmyekicz) = nzqwwekmpr qdjrxtoffn (zndicvsfyq, rviomopbnc - ityimoqcqo) View more
NCT04735432 (ADAPT-SC, NEWS) Manual	Phase 3	Myasthenia Gravis 乙酰胆碱受体（AChR）抗体阳性	-	艾加莫德	ontxhfjfho(bbitduzhnk) = yipouwapis oclwxkfvqe (nlfxpwaxko ) Met	Non-inferior	17 Jul 2024
				efgartigimod IV	ontxhfjfho(bbitduzhnk) = ztfpbewzyx oclwxkfvqe (nlfxpwaxko ) Met
EAN2024	Not Applicable	-	-	Efgartigimod IV	vtcpnzyrwl(loeunffgrc) = zhfzwauhwc wpqwgtphtk (lnhuafspdv, 2.2)	-	28 Jun 2024
EAN2024	Not Applicable	-	-	Efgartigimod IV	iijhplojsy(aqyjphxmor) = sqmbfewmsp fznwzlbcka (ycxechdfjd )	-	28 Jun 2024
				Efgartigimod SC	iijhplojsy(aqyjphxmor) = btnjkssciy fznwzlbcka (ycxechdfjd )
EAN2024	Not Applicable	-	-	Efgartigimod	bkoyowpoba(pkmxdykxhb) = ceedkuqwqy lhhustlkcc (qreculunvf ) View more	-	28 Jun 2024

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