Hello, and welcome to Regeneron Pharmaceuticals Fourth Quarter 2024 Earnings Conference Call. My name is Tawanda, and I will be your operator for today's call. At this time, all participants are in a listen-only mode. Later, we will conduct a question-and-answer session. Please note that this conference is being recorded. I will now turn the call over to Ryan Crowe, Senior Vice President, Investor Relations. You may begin.

Thank you, Tawanda. Good morning, good afternoon, and good evening to everyone listening around the world. Thank you for your interest in Regeneron, and welcome to our fourth quarter 2024 earnings conference call. An archive and transcript of this call will be available on the Regeneron Investor Relations website shortly after the call ends. Joining me on today's call are Dr. Leonard Schleifer, Board Co-Chair, Co-Founder, President and Chief Executive Officer; Dr. George Yancopoulos, Board Co-Chair, Co-Founder, President, and Chief Scientific Officer; Marion McCourt, Executive Vice President of Commercial; and Chris Fenimore, Executive Vice President and Chief Financial Officer. After our prepared remarks, the remaining time will be available for your questions. I would like to remind you that remarks made on today's call may include forward-looking statements about Regeneron. Such statements may include, but are not limited to those related to Regeneron and its products and business, financial forecast and guidance, development programs and related anticipated milestones, collaborations, finances, regulatory matters, payer coverage and reimbursement, intellectual property, pending litigation and other proceedings, and competition. Each forward-looking statement is subject to risks and uncertainties that could cause actual results and events to differ materially from those projected in that statement. A more complete description of these and other material risks can be found in Regeneron's filings with the United States Securities and Exchange Commission, including its Form 10-K for the year ended December 31, 2024, which we expect to file with the SEC tomorrow, February 5. Regeneron does not undertake any obligation to update any forward-looking statements, whether as a result of new information, future events, or otherwise. In addition, please note that GAAP and non-GAAP financial measures will be discussed on today's call. Information regarding our use of non-GAAP financial measures and a reconciliation of those measures to GAAP is available in our quarterly results press release and our corporate presentation, both of which can be accessed on the Regeneron Investor Relations website. Once our call concludes, Chris and the IR team will be available to answer any further questions. With that, let me turn the call over to our President and Chief Executive Officer, Dr. Leonard Schleifer. Len?

Thank you, Ryan, and thank you everyone for joining today's call. Regeneron capped 2024 with a strong fourth quarter, highlighted by 10% revenue growth, reflecting the strength and durability of our key franchises, primarily, Dupixent, Libtayo, and EYLEA and EYLEA HD. 2024 was also a year in which we made significant investments across our broad pipeline, which yielded notable progress across several key programs. For my remarks today, I will review some of our key performance drivers, then briefly discuss a few of our more differentiated pipeline opportunities and close with a few comments on capital allocation. After my remarks, George will provide further updates on our pipeline; Marion will then review our commercial performance; and finally, Chris will detail our financial results for the fourth quarter of 2024 and our guidance for the current year. To start, I would like to share my perspective on the current state of Regeneron. From the beginning, our focus has been on science and innovation, developing cutting-edge technology platforms that repeatedly yield scientific breakthroughs. These efforts have led to 13 products that have been approved or authorized worldwide, several of which are driving revenue growth and hold significant future potential. Our approach has already delivered five blockbuster drugs, a leading pipeline of approximately 40 product candidates across various therapeutic areas, and a world-class DNA sequence linked healthcare database, providing us with unparalleled insights into key drivers of disease. At the JPMorgan Conference last month, we detailed 10 differentiated mid and late pipeline opportunities that could collectively address a total market opportunity of over $220 billion. Given these opportunities, the strength of our early-stage pipeline and our turnkey technology platforms, we have never been more confident in Regeneron's future, and we are incredibly excited about what lies ahead. Moving to our quarterly results. Dupixent continues to be a transformative medicine with over 1 million patients on treatment around the world across seven approved indications. In the U.S., Dupixent remains the leader in new to brand prescription share across all of its approved indications and continues to be well-positioned for future growth, given the potential for further penetration in approved indications, the ongoing launch in COPD, and potential 2025 launches in chronic spontaneous urticaria and bullous pemphigoid. Regarding the ongoing launch in COPD, where Dupixent is the first and only biologic approved, we and our partner Sanofi have made great progress securing broad payer coverage and reimbursement, positioning us to drive uptake over the course of this year and beyond. EYLEA HD and EYLEA continued to lead the anti-VEGF category and our commercial efforts remain focused on driving EYLEA HD uptake, while preserving share for EYLEA in an increasingly competitive category. Over the course of this year, we expect continued competitive pressure on EYLEA while strengthening the profile of EYLEA HD by offering it in a more convenient prefilled syringe administration, broadening its label to include macular edema following retinal vein occlusion or RVO and adding more dosing flexibility, including every four-week dosing as well as extended dosing intervals of up to every 24 weeks for certain indications. With these anticipated label enhancements, EYLEA HD will offer the broadest set of retinal disease indications with the greatest dose and flexibility of any product in the anti-VEGF category, positioning it to become the new standard of care in the category, and we anticipate these enhancements will lead to an acceleration in EYLEA HD uptake starting in the second half of this year. Libtayo became Regeneron's latest blockbuster product in 2024, and we are looking to build on that by expanding shared metastatic non-melanoma skin cancers along with making further inroads in lung cancer. We also plan to seek regulatory approval for high-risk adjuvant cutaneous squamous cell carcinoma, a setting in which KEYTRUDA failed and over the longer term could represent a blockbuster opportunity globally in and of itself. Moving to our pipeline and focusing on the upcoming year. We expect regulatory approvals for linvoseltamab in relapsed/refractory multiple myeloma, odronextamab in late-line follicular lymphoma, and the aforementioned Libtayo indication in adjuvant CSCC. In addition, we expect to read out pivotal or proof-of-concept data this year from several other programs, including our pivotal AERIFY studies for itepekimab, our IL-33 antibody, in former smokers with COPD. Pivotal data for the fianlimab-Libtayo combination in first-line metastatic melanoma are also anticipated in 2024. We also expect pivotal data for our C5 antibody siRNA combination in generalized myasthenia gravis. Finally, we expect to learn more about our potential opportunity to improve the quality of weight loss in obese patients on semaglutide by blocking myostatin and Activin A. George will soon discuss these programs in more detail and provide updates on many of the other programs in our broad and differentiated pipeline. Finally, regarding capital allocation, this morning, we were pleased to announce the initiation of a quarterly cash dividend program and an additional $3 billion share repurchase authorization, increasing our total current buyback capacity to approximately $4.5 billion. These decisions reflect our Board and management's ongoing commitment to returning capital to shareholders, but this does not change the core of our capital allocation framework. Importantly, our dividend will not impact the way we plan to heavily invest in our business and pipeline going forward, does not impair our ability to do business development in the future and we anticipate that share repurchases will remain the primary means of returning capital to shareholders. However, initiating a dividend reflects our continued confidence in the future cash flows from our business, provides more balance to our approach to capital returns, gives us flexibility in how we return capital in the future, and expands the pool of potential Regeneron shareholders to include funds with a dividend mandate. In closing, Regeneron remains in a very strong position scientifically, commercially, and financially, enabling us to invest heavily in R&D and deliver tremendous innovation from our pipeline, maximize the growth opportunities from our in-line brands, initiate a quarterly dividend, and significantly increase our capacity to repurchase shares. We look forward to keeping you updated in these innovations throughout 2025 and beyond.

Thank you, Len. At last month's JPMorgan Healthcare Conference, we showcased our robust R&D efforts and the promising opportunities within our pipeline that have the potential to revolutionize the practice of medicine across several different disease areas. This year holds the potential to be transformative for Regeneron, as we hope to capitalize on several of our scientific and technological breakthroughs. We anticipate reporting pivotal or proof-of-concept data from multiple programs across diverse therapeutic areas, including in oncology, COPD, and obesity, while also rapidly advancing our Factor XI antibodies to multiple Phase 3 trials. These programs represent significant opportunities for Regeneron to address substantial unmet needs across large commercial categories, positioning Regeneron for long-term growth. Let me highlight some of these opportunities and recent pipeline advancements. Starting with EYLEA HD, in December, we and Bayer reported positive data from the Phase 3 QUASAR study in retinal vein occlusion, where EYLEA HD demonstrated non-inferior vision gains within every eight-week dosing regimen compared to the standard-of-care 2 milligram EYLEA dosed every four weeks. Additionally, approximately 90% of EYLEA HD patients were able to maintain eight-week dosing intervals throughout the 36 weeks. These data together with our recently presented long-term follow-up data from the PULSAR and PHOTON studies in wet AMD and DME, respectively, continue to support EYLEA HD's best-in-class clinical profile. We remain on track to submit a supplementary BLA for this indication later in the first quarter. We also plan to seek approval from the FDA to potentially include every four-week dosing, maximizing EYLEA's HD dosing flexibility for physicians. Along with the submission for a prefilled syringe and the potential FDA approval in April to extend dosing intervals to up to 24 weeks, the longest intervals in the category, EYLEA HD is set to provide the greatest dosing flexibility across the broadest indication set of any anti-VEGF therapy, all in a convenient prefilled syringe. Next, in immunology, starting with Dupixent. In November, Dupixent was approved in Europe to treat eosinophilic esophagitis in children as young as one year old, making it the first and only medicine indicated for these young patients in the U.S. and the European Union and further highlighting Dupixent's exceptional safety profile. The supplementary BLA resubmission for chronic spontaneous urticaria was recently accepted by the FDA with a target action date of April 18, potentially making it the first new target therapy for CSU in a decade. Finally, a supplementary BLA was submitted for bullous pemphigoid late last year, marking another first, as Dupixent is the only biologic to achieve significant improvements in disease remission and symptoms for this indication. While Marion will discuss the ongoing launch of Dupixent in COPD, I want to remind you of another potentially significant opportunity in COPD with itepekimab, our interleukin-33 antibody discovered by Regeneron. We anticipate reporting pivotal results in former smokers from the AERIFY program in the second half of this year, a partially overlapping and distinct population from that treated with Dupixent. As part of our long-term commitment to improving the lives of patients with allergic conditions, I would also like to highlight the compelling initial data from our ongoing Dupixent plus linvoseltamab trial for severe food allergy. These two agents have the potential to eliminate immunoglobulin E or IgE, the key driver allergic reactions and prevent IgE from returning, thereby reversing severe allergies. Last month, we shared initial clinical data from the first patient in our proof-of-concept study, which showed greater than 90% reductions in both total and food-specific IgE levels following initial treatments at low doses. This trial is continuing to enroll patients and we plan to provide updates throughout 2025. Turning now to oncology, where we continue to break new ground. Last month, we announced positive data for Libtayo in high risk adjuvant CSCC, becoming the first immunotherapy to show a benefit in this high risk population. At the first pre-specified interim analysis for disease-free survival, adjuvant Libtayo demonstrated a 68% reduction in the risk of disease recurrence or death compared to placebo with no new safety signals identified. This is the same setting in which Merck reported last year that KEYTRUDA had failed, highlighting that antibodies even within the same class do not always produce the same treatment effect. We plan to submit these data to the FDA in the first half of 2025 and present these results at a medical meeting later this year. This dataset reinforces our belief that Libtayo provides a best-in-class foundation for combinations with our other oncology assets. Data from early clinical trials in melanoma suggests that fianlimab, our LAG-3 antibody when combined with Libtayo, might be the first combination to demonstrate meaningful additive benefit compared to PD-1 monotherapy without exacerbating safety. This combination is being studied in an ongoing randomized Phase 3 trial versus KEYTRUDA monotherapy in first-line metastatic melanoma with results expected in the second half of this year. If these data confirm best-in-class activity in melanoma, it will increase our confidence for this combination in other cancer settings. Turning to our CD3 bispecifics. We are pleased to announce that we have recently resubmitted the BLA for Linvoseltamab, our BCMAxCD3 bispecific for relapsed/refractory multiple myeloma following the resolution of third-party manufacturing issues. Linvoseltamab has the potential to be the best-in-class BCMAxCD3 bispecific due to its differentiated clinical profile, dosing, and administration with nearly double the reported complete response rates at similar duration of follow-up. Given the strength of the data in late lines of therapy, including the observed level of efficacy and favorable safety profile of Linvoseltamab, we are pursuing a differentiated approach in earlier lines of therapy, emphasizing monotherapy and novel limited combination approaches. For odronextamab, our CD20xCD3 bispecific, we are pleased to announce that we have resubmitted the BLA for relapsed/refractory follicular lymphoma, where odronextamab has also demonstrated potentially best-in-class efficacy and we expect an FDA decision in the second half of 2025. In December, at the American Society of Hematology Meeting, we presented initial results from the safety lead in portion of the confirmatory Phase 3 OLYMPIA trial. Odronextamab monotherapy delivered complete responses in all 12 patients evaluable for efficacy with previously untreated follicular lymphoma. As a reminder, the standard-of-care regimen in this setting, rituximab plus chemotherapy, has historically achieved complete responses in approximately 67% of patients. Based on this impressive monotherapy efficacy for odronextamab in both late line and first line patients, we are once again exploring a differentiated program in early lines of therapy, highlighted by our head-to-head evaluation of odronextamab monotherapy compared to rituximab plus chemotherapy in our Phase 3 OLYMPIA-1 trial, which has already achieved over 40% enrollment. Our CD28 co-stimulatory bispecifics for solid tumors are also progressing. We're working to mitigate safety concerns related to their combination with PD-1 blockade while prioritizing combination with CD3 bispecifics. The science suggests that this approach may enhance efficacy with fewer immune mediated adverse events. We will provide updates on these innovative combinations later this year. Moving now to a rapidly advancing Factor XI program. We're employing a two-pronged approach to anticoagulation that offers the potential for improved blood clot prevention and lower bleeding risk. Supported by genetic data from the Regeneron Genetic Center, our approach has delivered two antibodies with unique profile to meet different market needs. REGN7508, which targets the catalytic domain of Factor XI, may provide improved efficacy compared to standard-of-care options, offering patients who need significant anti-coagulation activity, a potentially more effective option. On the other hand, REGN9933, which targets the A2 domain, is expected to carry a lower risk of bleeding, potentially making it a viable option for patients with the highest bleeding risk who would otherwise not be candidates for currently available anticoagulants. Late this year, we reported positive proof-of-concept data for the prevention of venous thromboembolism following total knee replacement with both antibodies demonstrating robust anti-thrombotic effects. REGN7508 was superior to enoxaparin and non-inferior to apixaban, while REGN9933 was numerically better than enoxaparin. These data support the advancement of both antibodies into broad pivotal programs across multiple indications and patient types with initial Phase 3 studies expected to begin enrolling this year. Moving briefly to obesity, where we are progressing early clinical programs and an expansive pipeline of preclinical assets. Our muscle-sparing Phase 2 COURAGE study is investigating the addition of trevogrumab to semaglutide with and without garetosmab to improve the quality of weight loss and evaluate the maintenance of weight loss after discontinuing semaglutide. This trial is fully enrolled with data expected in the second half of the year. Moving to our Regeneron genetics medicine pipeline. Starting with our differentiated siRNA plus antibody approach, we have the potential to address multiple complement mediated diseases. In December, at the ASH Annual Meeting, we presented compelling updated results from an exploratory cohort in our Phase 3 program for paroxysmal nocturnal hemoglobinuria. Our combination achieved greater disease control compared to the current standard-of-care ravulizumab and only our combination lowered mean LDH levels to the normal range. When ravulizumab patients were switched to our combination, their mean LDH levels, which remained higher than normal, also became normalized. We are also evaluating this combination in generalized myasthenia gravis with pivotal results expected in the second half of this year. In addition, we recently initiated our Phase 3 program exploring this combination in geographic atrophy in dry age-related macular degeneration, where we believe our systemic approach has several advantages over currently approved intravitreal agents. For DB-OTO, our otoferlin gene therapy program for genetic hearing loss, we announced data last month from the ongoing clinical program. DB-OTO is an AAV-based dual vector gene therapy delivered to the inner ear to enable hearing in children suffering from profound genetic hearing deficit. We reported that 10 out of 11 treated children with at least one post-treatment assessment showed a notable increase in hearing with some reaching the normal range. We look forward to continuing to share additional data later this year. Regarding our collaboration with Alnylam, we are advancing several new siRNA CNS programs, including synuclein for Parkinson's and TAU for Alzheimer's and other neurodegenerative diseases with trials initiating later this year. And finally, I would like to highlight two recent advances that extend our leadership position in the field of structured big data that will be necessary to allow computational approaches to revolutionize the healthcare industry. Over the past decade, we have become the leader in high throughput human DNA sequencing, enabling us to create the world's largest DNA sequence linked healthcare database encompassing nearly 3 million individuals, all with DNA sequence linked to de-identified healthcare records. We are now emerging also as the leaders in high throughput proteomics as reflected by the selection of the Regeneron Genetics Center to generate the proteomics data for the UK Biobank Pharma Proteomics project, building on our previous selection to provide the sequence data for the UK Biobank. Importantly, our new strategic collaboration with Truveta is expected to dramatically expand our database to include up to an additional 10 million individuals from Truveta's network of leading U.S. health systems, with the opportunity to generate both DNA sequence and proteomics information. While our leadership position in this big data space has already proven invaluable for our drug discovery and development efforts, we believe it can ultimately help us contribute to revolutionizing the field of healthcare analytics and management. In summary, I have never been more excited about the future of Regeneron and our potential to transform the practice of medicine and revolutionize the healthcare industry. Our pipeline is more innovative and exciting than ever, and we anticipate several pivotal or proof-of-concept data readouts throughout 2025, positioning Regeneron for long-term success. Let me now turn the call over to Marion.

Thank you, George. Regeneron's fourth quarter performance demonstrates our ongoing leadership across therapeutic categories. Our commercial team is well positioned to optimize our 2025 growth opportunities, driven by new indications, new product enhancements, and new product approvals. Turning to fourth quarter results, starting with EYLEA HD and EYLEA. In January, we announced combined fourth quarter U.S. net sales of $1.5 billion for EYLEA HD and EYLEA, capturing over 46% of the total anti-VEGF category. For the full year, net product sales grew by 1.4% to approximately $6 billion despite increasing competition in the category. EYLEA HD net sales were $305 million in the fourth quarter and $1.2 billion for the full year, representing 20% of the combined net sales for EYLEA HD and EYLEA. Fourth quarter net sales for EYLEA HD were affected by elevated wholesaler inventory levels at the end of Q3, which were absorbed over the course of the fourth quarter. In 2025, our team is laser-focused on growing EYLEA HD adoption. Physicians tell us that EYLEA HD has the potential to be the new standard of care for retinal diseases and several catalysts occurring this year will put us in a position to grow our competitive share. The team is ready to launch the prefilled syringe and our two-year label updates, both of which are anticipated to occur in the second quarter. Physicians eagerly await the prefilled syringe, which has been described as game changing by clinical trial participants. Further, our two-year long-term follow-up data from the PULSAR and PHOTON studies in wet AMD and DME, respectively, clearly illustrate EYLEA HD's ability to extend dosing beyond any other competitor in the anti-VEGF category. Two other potential FDA approvals are also expected later this year, the RVO indication and additional dosing flexibility. In RVO clinical trials, EYLEA HD dosing could be extended to every 12 weeks following loading doses, making it the only medicine with durability beyond four weeks and also the only medicine to show a numeric improvement in vision for RVO patients compared to EYLEA dosed every four weeks. In terms of additional dosing flexibility across all of our approved indications, we look forward to the potential FDA approval of every four-week dosing for the subset of patients who need it, which would mean EYLEA HD has the most flexible dosing schedule of any anti-VEGF medicine. Fourth quarter EYLEA net sales were $1.2 billion, primarily driven by persistent physician demand in spite of a recent aflibercept 2 milligram biosimilar launch. Wholesale inventory levels were elevated at the end of the fourth quarter, and we expect EYLEA net sales will be negatively impacted in the first quarter of 2025 as this increase in inventory is absorbed. We also expect ongoing market dynamics will put downward pressure on EYLEA business. We continue supporting existing and new patients who benefit from EYLEA while prioritizing uptake of EYLEA HD, which has the clinical profile to potentially become the new standard of care in the anti-VEGF category. Turning now to Libtayo, which achieved blockbuster status in 2024 with global net sales of $1.2 billion. In the fourth quarter, global net sales grew by 50% year-over-year to $367 million with U.S. net sales reaching $251 million. Libtayo's strong performance was based on growth in non-melanoma skin cancers and steady gains in lung cancer. Looking forward, we eagerly await the submission and potential approval of Libtayo in high-risk adjuvant CSCC beginning in the U.S. where we estimate there are approximately 10,000 patients who may benefit from treatment. And next to Dupixent, which continues to deliver exceptional results in Type 2 inflammatory diseases, approved in seven indications worldwide, more than 1 million patients are currently benefiting from Dupixent treatment. Three of these indications, atopic dermatitis, asthma, and nasal polyps have achieved blockbuster status, each generating over $1 billion in annual net sales. In the fourth quarter, Dupixent worldwide net sales grew 15% year-over-year to $3.7 billion with increasing volume across all indications, age groups, and geographies. In the U.S., net sales grew 10% year-over-year to $2.7 billion, driven by a 24% increase in total prescriptions, including the recent COPD launch. As Sanofi noted, fourth quarter results were negatively impacted by one-time items. We continue to see broad growth across all blockbuster indications of atopic dermatitis, asthma, and nasal polyps. Despite new entrants in atopic dermatitis, Dupixent continues to be the first choice for physicians who now understand that IL-4 and IL-13 are crucial drivers of Type 2 inflammation. Additionally, there is robust uptake in our recent U.S. launches for eosinophilic esophagitis and prurigo nodularis with current trends suggesting that these indications will likely also achieve blockbuster status. We are off to a promising start in COPD following approvals in more than 30 countries. In the U.S., the FDA approved Dupixent in September of last year, and we are very encouraged by our progress in early market adoption. Together with our partner, Sanofi, we've made significant strides in securing U.S. access and reimbursement for commercial and Medicare patients. At the start of this year, nearly 85% of commercial patients and nearly 90% of Medicare patients have coverage. Additionally, we are pleased that global gold treatment guidelines for COPD now include Dupixent as the only recommended biologic medicine for these patients. We look forward to accelerating the launch of this important indication and to make a significant difference in the lives of hundreds of thousands of COPD patients worldwide. Our teams are also preparing for a potential April launch in chronic spontaneous urticaria pending FDA approval. We believe Dupixent offers a compelling treatment option and if approved, would be the first new targeted therapy in the U.S. in over a decade for the estimated 300,000 CSU patients. In conclusion, we continue to deliver solid performance across our commercial portfolio in the fourth quarter. We also see significant growth opportunities in 2025 and beyond with near and medium-term catalysts to drive growth. With that, I'll turn the call to Chris.

Thank you, Marion. My comments today on Regeneron's financial results and outlook will be on a non-GAAP basis unless otherwise noted. Regeneron ended 2024 with strong financial performance in the fourth quarter, delivering growth on both the top and bottom line. Total revenues grew 10% year-over-year to $3.8 billion, primarily reflecting higher Sanofi collaboration revenue driven by Dupixent growth, strong global net sales growth for Libtayo, and modest growth for combined net sales of EYLEA HD and EYLEA in the U.S. Fourth quarter diluted net income per share was $12.07, a net income of $1.4 billion, up 2% from the prior year. On a full year basis, total revenues were $14.2 billion, representing growth of 10% when excluding revenues from Ronapreve. 2024 earnings per share grew 4% from the prior year to $45.62. Turning to collaboration revenue in the fourth quarter. Revenues from the Sanofi collaboration were $1.2 billion, of which $1 billion related to our share of collaboration profits. Regeneron's share of profits grew 18% versus the prior year, driven by volume growth through Dupixent and higher collaboration margins. For the year, our share of profit, net of development balance reimbursement increased to the highest level since the initiation of the collaboration, reaching approximately 20% of total antibody net sales. The Sanofi development balance was approximately $1.6 billion at the end of 2024, reflecting a reduction of approximately $175 million from the end of the third quarter, and approximately $700 million from the end of 2023. We continue to expect this balance to be fully reimbursed by the end of 2026, which is expected to result in a significant increase in Sanofi collaboration revenue and cash flow thereafter. Moving to Bayer. Fourth quarter ex-U.S. net sales of EYLEA and EYLEA 8 mg were $888 million, up 2% on a constant currency basis versus the prior year. Total Bayer collaboration revenue was $377 million, of which $349 million related to our share of net profits outside the U.S. Now to our operating expenses. R&D expense was $1.2 billion in the fourth quarter. The increase in R&D expense versus the prior year was driven by costs to support the advancement of Regeneron's broad clinical pipeline, including our C5 and Factor XI programs in hematology, certain oncology programs, itepekimab in COPD, and our ongoing program in obesity. Fourth quarter SG&A was $681 million with growth from the prior year, primarily reflecting investments to support the launch of EYLEA HD and our international expansion. Fourth quarter 2024 gross margin and net product sales was 86%, up slightly from the prior year quarter. Now to cash flow and the balance sheet. Regeneron generated approximately $3.7 billion in free cash flow in 2024 and ended the year with cash and marketable securities less debt of approximately $15.2 billion. In 2024, we deployed $2.6 billion towards share repurchases, including a meaningful step-up in the fourth quarter during which we repurchased nearly $1 billion of our shares. Consistent with our capital allocation framework, we are investing heavily in our R&D capabilities to drive long-term growth, exploring business development opportunities, and returning capital to shareholders. This morning, we announced an additional share repurchase authorization of $3 billion, increasing our capacity for repurchases to approximately $4.5 billion as of today. In addition, we are enhancing our approach to returning capital to shareholders. As announced this morning, our Board of Directors has authorized the initiation of a quarterly dividend with the first dividend payable on March 20 to shareholders of record as of February 20. The dividend will be $0.88 per share, equivalent to $3.52 per share on an annual basis. We are confident in the long-term growth of our business, our innovative R&D engine, our differentiated pipeline, and the durability of our cash flows, all of which support the initiation of our first quarterly dividend and the announcement of an additional share repurchase authorization. I'll conclude with a review of our 2025 financial guidance. We expect 2025 R&D spend to be in the range of $5 billion to $5.2 billion. The increase versus 2024 is driven by costs to support our expanding late-stage pipeline, including Phase 3 programs for our Factor XI antibodies and Heme-onc bispecifics as well as programs in obesity and genetic medicines and the advancement of multiple new assets into the clinic. We expect 2025 SG&A to be in the range of $2.55 billion to $2.7 billion, representing 3% growth at the midpoint of this range versus 2024, driven by investments to support multiple potential oncology launches. We expect our gross margin on net product sales to be in the range of 87% to 88%. This guidance reflects a changing product mix as well as ongoing start-up costs for our new fill/finish facility and investments to drive future efficiencies across our manufacturing network. We expect cost of collaboration manufacturing to be in the range of $1 billion to $1.15 billion in 2025, primarily driven by higher Dupixent volumes. Recall that we are reimbursed for these costs as revenue, making them generally neutral to net income. We expect 2025 capital expenditures to be in the range of $850 million to $975 million, primarily related to ongoing expansion of the R&D facilities at our Tarrytown headquarters and investments to increase both manufacturing capacity in the U.S. and Ireland to support our expanding pipeline. Finally, we expect our 2025 effective tax rate to be in the range of 11% to 13%. In summary, Regeneron delivered solid financial results in 2024 and our strong financial position and prudent capital allocation enables Regeneron to deliver long-term shareholder value. With that, I'll pass the call back to Ryan.

Thanks, Chris. This concludes our prepared remarks. We will now open the call for Q&A. To ensure we are able to address as many questions as possible, we will answer only one question from each caller before moving to the next. Tawanda, can we go to the first question, please?

Thank you. Please stand by for our first question. Our first question comes from the line of Brian Abrahams. Your line is open.

Good morning, everyone. I appreciate you taking my question. The consensus indicates an expected annual decline in sales of around 7% for the EYLEA franchise over the next few years. Considering what you've observed in the market and the dynamics you mentioned, including competitive pressures and a potential increase in HD with some recent approvals, do you believe these expectations are reasonable? I understand you usually don't provide guidance, but any direction you could give would be beneficial in helping us understand if people are interpreting these dynamics correctly or if expectations are overly optimistic. Thank you.

We do not provide guidance, but I wanted to share our perspective on the market. We believe that EYLEA HD is positioned strongly, especially with the anticipated FDA approvals this year for the prefilled syringe delivery system and indications for RVO, as well as the clinical data supporting its durability. With $1.2 billion in net sales last year, EYLEA HD is recognized as a blockbuster product, which contributes to its compelling profile. However, we need to acknowledge the increasing competitive pressure, particularly with the presence of a biosimilar in the market. Despite this, we are confident in our strong market position, as evidenced by our category share of 46% in the fourth quarter.

Thank you. Next question, please.

Thank you. Our next question comes from the line of Tyler Van Buren with TD Cowen. Your line is open.

Hey, guys. Good morning. Thank you very much for taking the question. So the dividend initiation is an exciting disclosure and earlier than some might have expected. So I'm curious, why you guys decided to institute the dividend now as opposed to when the Sanofi development balance is paid off by the end of next year and whether you plan to increase it from these levels over time?

Thanks, Tyler. Thanks for the question. So obviously, we publicly were talking about initiating it at the end of the repayment of the Sanofi development balance. I think for a variety of reasons, we have a lot of confidence as we reiterated on the call today that would be paid down. It's also obviously a differentiation in our capital allocation strategy to sort of migrate a little bit away from share buybacks, although, as Len indicated in his remarks, that will be the primary purpose of returning capital to our shareholders, but allowing us a little more flexibility of starting the dividend. And it also opens up a larger base of shareholders. So there are a lot of funds out there that have a dividend mandate and this will give them the opportunity to invest in Regeneron that they wouldn't have otherwise in the past been able to do.

Thanks, Chris. Next question, please.

Our next question comes from the line of Cory Kasimov with Evercore.

Hey. Good morning, guys. I wanted to ask on the adjuvant CSCC Libtayo readout that you toplined in January. How critical is it that the product also hits an overall survival in addition to the DFS you top lined, and can you kind of comment as to how you see this the opportunity here from a commercial perspective relative to the indications you already have? Thank you.

Well, because these patients are relatively earlier stages of their disease, they tend to have long survival times from their initial surgeries and so forth. So there are very few survival events. That said, of course, the FDA will be looking at the data to make sure that at least numerically things are not going in surprising or wrong directions. But we have confidence that the package is going to look pretty attractive.

And then just adding on the commercial perspective, as I noted, we obviously have a very capable and talented oncology Libtayo team in the U.S. and in key international markets. But for the U.S., we estimate there to be about 10,000 patients, who may benefit from the adjuvant CSCC indication.

Thanks, George and Marion. Next question please, Tawanda.

Our next question comes from the line of Salveen Richter with Goldman Sachs.

Good morning. Thanks for taking my question. Could you just speak to the magnitude of inventory impact on EYLEA HD that played out last quarter and also the dynamics that are happening in the marketplace with Pavblu, the biosimilar?

So Salveen, as we had noted last quarter, there had been a build in EYLEA HD inventory and that obviously impacted fourth quarter for EYLEA burning off that inventory. As to the specific numbers, the range of impact in total would have been in the range of, if we looked at the combined EYLEA HD and EYLEA net product sales for the fourth quarter, the favorable impact was predominantly to EYLEA and that was about $85 million. And that was the result of higher wholesale inventory levels for EYLEA, partially offset by lower wholesale inventory levels for EYLEA HD.

Did you want to comment on the Pavblu impact?

Well, it's really difficult to comment on Pavblu. I will know one thing that very recently, we had some victories at the Federal Circuit Court of Appeals, which thus far is leading to the conclusion that there is only one competitor of a biosimilar. If that holds, that really changes the dynamic quite a bit in terms of pricing and things like that. So, having one competitor is quite different than having multiple competitors. So, I encourage you to look at some of the recent wins we had at the federal circuit on the injunctions against other players. In terms of what's actually going in the market, I think maybe you'll be on Amgen's call this afternoon, maybe they can give you a more direct answer.

Thank you. Next question, please.

Our next question comes from the line of Chris Schott with JPMorgan.

Hi. This is Taylor Hanley on for Chris Schott. I just had a question on how you're thinking about operating expenses going forward. So with numerous programs advancing to late-stage development, how are you thinking about balancing investments across the pipeline? And do you think that there would be the potential to partner any of these programs, or should we think about Regeneron keeping everything in-house going forward?

It's crucial to highlight that our main focus for capital allocation is towards our research and development initiatives. We are currently analyzing our investment compared to other companies, factoring in equity investments and upfront costs that essentially fund research and development. The data will likely demonstrate that we possess extremely effective R&D capabilities relative to our financial investment within the industry. Regarding potential partnerships, whether financial or strategic for certain programs, we have always remained open-minded about what is best for each program and how to appropriately allocate our resources. We do not adhere to a fixed allocation model; instead, we assess which expenditures are valuable and explore various funding options for our programs, making decisions based on that approach rather than following strict budget quotas. This flexibility has proven beneficial and will continue to be advantageous as we manage over 40 programs in clinical development, with many more progressing toward the clinic.

Okay. Thank you. Next question, please, Tawanda.

Our next question comes from the line of Christopher Raymond with Piper Sandler.

Hey. This is Sam on for Chris. Thanks for taking our question. On EYLEA, we noticed you had a modest price increase, which is the first time we've seen that for EYLEA. Meanwhile, we've seen Roche have more regular price increases for Vabysmo since they launched. Any comments on your pricing strategy for EYLEA going forward? Is the goal to stabilize average sale price over time? Thank you.

No comment.

Okay. I was going to say no comment. I'll add, you mentioned a price increase for EYLEA, there is also a modest price increase for EYLEA HD.

Next question, please.

Our next question comes from the line of Mohit Bansal with Wells Fargo.

Thank you for taking my question. Marion, I would like to hear more about your thoughts on the trajectory of EYLEA HD for the year. It appears you're indicating that you anticipate some additional conversion when the prefilled syringe and label expansion occur. Could you clarify if you expect this to be a gradual increase or if there's potential for a significant shift, especially in relation to the prefilled syringe given how well that formulation is being received in the market? Thank you.

Mohit, I don't have additional comment at this time. I wanted to give the overall balance that we see, obviously opportunity for EYLEA HD to continue to grow. As you know, the market is probably about 10% naive patients, 90% switch patients going over to EYLEA HD and among those patients that are switching, the source of business is often coming from EYLEA, second, aflibercept, and third, Avastin. But as to the overall market dynamics, I don't have additional comments.

I would encourage you to look beyond the intense focus on EYLEA. We have Dupixent launching for COPD, pivotal data upcoming for itepekimab in COPD, and data for first-line metastatic melanoma expected in the latter part of this year. We also have upcoming data on myasthenia gravis and are starting a trial in geographic atrophy, among other initiatives. Our strategy is not to rely solely on any single aspect while still optimizing all our programs. We aim to maximize each of our initiatives, but we want to avoid dependency on one thing, which is why we are enthusiastic about our pipeline. So, the important point is the pipeline.

Okay. Thank you. Next question, please, Tawanda.

Our next question comes from the line of Tim Anderson with Bank of America.

Hi. This is Alice Nettleton on for Tim Anderson. Thanks for taking our question. Sorry, another one on EYLEA…

Why don't we return to that question at the end, so we can address some non-EYLEA inquiries? We'll place you at the end of the queue and come back to you.

Next question, please.

One moment. Our next question comes from the line of Akash Tewari with Jefferies.

I'm not going to ask about EYLEA. George, I'd love your thoughts on Factor XI. We've noticed issues with some private monoclonal antibody players in preventing ischemic stroke events, along with their antibodies showing an inverse dose response on bleeding prevention. However, Regeneron is the only company that has demonstrated an additional benefit in a total knee replacement study compared to Eliquis. Can you discuss your confidence in 7508 and some of the recent data in this area?

Our strategy from the onset was to leverage our understanding of genetics to design and select two antibodies that have complementary yet distinct profiles, enabling various treatment options for patients and allowing doctors to choose the most suitable antibody for individual needs. The antibody 7508, which you mentioned, targets the catalytic domain and has demonstrated the strongest biochemical blocking capability and the highest anti-coagulant activity in side-by-side comparisons. It is intended for patients requiring significant anti-coagulant control and showed impressive results in the initial proof-of-concept studies regarding its functionality. In contrast, the 9933 antibody affects the A2 domain, designed to be gentler, with genetics suggesting it carries minimal, if any, bleeding risk but may also offer slightly less anti-coagulant activity. This design aims to provide alternatives for patients and physicians who are particularly concerned about bleeding risk. We believe offering both options grants powerful flexibility to address the challenge of managing anticoagulation while minimizing bleeding concerns. We plan to gather comparative data across various settings to empower physicians and patients to select the most appropriate strategy for their circumstances. We see a significant demand for this type of flexibility, especially as many patients across various conditions, not just atrial fibrillation but also other diseases associated with thrombi and clots, remain untreated or are not receiving optimal treatment. Our goal is to meet this substantial unmet need by evaluating and obtaining data on these two genetically validated approaches.

Thanks, George. Next question, please.

Our next question comes from the line of William Pickering with Bernstein.

Hi. Thank you for taking my question. It's about your complement programs. So it seems like your antibody siRNA combo has potential to deliver really leading efficacy, but on safety, you've seen some Grade 5 AEs so far. Can you discuss how you see these combos fitting into the MG and GA treatment landscapes? And for GA specifically, anything about the design of the Phase 3 trial that would kind of minimize some of those safety events that you've seen so far? Thank you.

Yeah. So first of all, the safety events are consistent with what's been seen with the class in general. Right now, we don't really have evidence to suggest that it's different than the other approaches vis-à-vis safety. In terms of efficacy, it's an incremental benefit that is able to drive many more of the patients into the normal range. So the current drugs can achieve in some patients as deep a complement inhibition as we're seeing, but they don't do it for all the patients. We're doing it for a much higher percentage of patients. So, we're not really lowering complement to much lower levels. We're just driving more of the patients to the levels that are already being achieved. This is consistent with the safety profiles being analogous to what's already been seen with the class. But very importantly, it's the uncontrolled patients, which are causing the problems, whether it be in PNH or perhaps some of these other complement media diseases who are being sub-optimally treated, which we hope we now have a solution for. For those patients, roughly 30% of the populations even with the best standard-of-care who are left sub-optimally treated. That said, complement inhibition for an elderly or older AMD patient is certainly a concern with any approach. And as you said, we are doing a variety of things that are somewhat standard for the class to try to choose, first of all, enroll patients who are not as high-risk to make sure, for example, they're vaccinated against the organisms of risk and of course, monitoring them closely. But we have to balance that, of course, with the concerns and the safety events that have been happening with the intravitreal approaches. I mean, these are designed to slow down slowly progressing vision-threatening events, yet the safety events can cause catastrophic immediate vision loss in patients. So, that's a little bit of a dilemma. Do you take a prevention that can make you immediately blind to slow down your eventual blindness? We're hoping to offer another option for these patients that might not risk their vision, but as you said, we'll have to balance the safety infectious types of events, which as I said, are a class-specific type of problem.

Thanks, George. I think we have time for two more questions, Tawanda.

Our next question comes from the line of Dave Risinger with Leerink Partners. Your line is open.

Yes. Thanks very much. So my question is, on obesity. George, could you please discuss the need to combine myostatin with an Activin blocker to treat obesity and optimize body composition? I ask because I'm curious about whether if the Activin doesn't have the right benefit-risk profile, whether you could develop a myostatin as a standalone or not? Thanks very much.

Yeah. You pretty much summarize exactly our strategy based on our previous data in humans, including in sarcopenic individuals, the combination can grow more muscle. However, we do have some concerns with the Activin A blockade. The GDFA blockade now based on both genetics and what we've seen looks to be exceedingly safe in terms of all the early data. We don't have as much data with the Activin A, and so we're left with more concerns. So, we're testing the combination, but we can fall back on just single approaches, which might have a little bit less efficacy in terms of muscle preservation, but might be safer. So, that's why we're exploring these individually, but also together to understand the best benefit-risk profile. I want to remind you that, for example, at Lilly, they're trying a receptor blocker that not only blocks these two growth factors, but more than a dozen other related growth factors. So, that may yield good efficacy, but the concerns there is not only you're blocking the myostatin and the Activin A, but a dozen other factors as well and what are the potential side effects you'll see here? That's why we like our program that we can actually target the two most important factors as we've shown preclinically and clinically for muscle preservation, while also trying them individually. So that way we'll have, once again, the most flexibility as a lot of our programs are designed to dissect and separate individual agents in various processes to understand best the benefit-risk profile, where you might trade efficacy for safety and vice versa.

Thanks, George. I don't see Bank of America in the queue. So we'll just go to the next question in the queue as our final question.

Our final question comes from the line of Terence Flynn with Morgan Stanley.

Thank you. This is Chris on for Terence. Just a question on your LAG-3 plus PD-1 combo in the non-small cell lung cancer program. What is the efficacy bar on the duration of response or PFS that you need to see for you to advance that into a pivotal program? Thank you.

As we have observed from the limited data with Bristol, those datasets are quite small and it's challenging to draw convincing conclusions from them. That’s why we are concentrating more on our melanoma data. If the melanoma data meets the efficacy and safety standards we have seen in our proof-of-concept studies when we complete the Phase 3 trials, I believe this will generate significant enthusiasm for its potential to assist first-line melanoma patients and possibly expand this combination to various other cancer types, including lung cancer. Therefore, I believe that the larger dataset from the Phase 3 study will yield the most insights and confidence compared to the smaller Phase 2s and proof-of-concept studies, which can indeed create excitement but are not conclusive, as demonstrated by our own findings and those of others with related programs. I really emphasize the importance of the pivotal melanoma data; if it becomes the new standard of care in melanoma, it will likely generate considerable interest and excitement in other cancer areas as well.

I see Bank of America is back in the queue, so we will take our final question from them as promised.

Our next question comes from the line of Tim Anderson with Bank of America.

Hi. Thank you. This is Alice on for Tim. So back to my question on EYLEA. We talked to one big purchaser of EYLEA recently, who said that Regeneron essentially hasn't sweetened the contract terms on standard dose in an effort to compete with Amgen's product yet. So can we infer from this that you are likely to hold the ground on price and pricing concessions with the goal being that doctors will start using high-dose more once the label and product enhancements come through? Thank you.

Alice, thank you for your patience. We don't comment on pricing strategy, but I certainly will complement our very talented market access and pricing team, but no comment.

With that, we will conclude the call. Thank you, and thanks to everyone who dialed in for today's call. We apologize to those remaining in the Q&A queue. We did not have enough time to hear from you, but we're always happy to follow up. We're available to answer any remaining questions you may have. Thank you once again. Have a great day.

Ladies and gentlemen, that concludes today's conference call. Thank you for your participation. You may now disconnect.