Thank you for standing by. Welcome to the Merck & Company, Inc., Raleigh, New Jersey, USA, fourth quarter sales and earnings conference call. At this time, all participants are in a listen-only mode until the question and answer session of today's conference. At that time, if you'd like to ask a question, you may press star 1 on your phone and record your name at the prompt. This call is being recorded. If you have any objections, you may disconnect at this time. I would now like to turn the conference over to Mr. Peter Danbaum, Senior Vice President, Investor Relations, Sir, you may begin.

Thank you, Shirley, and good morning, everyone. Welcome to the fourth quarter 2025 conference call from Merkin Company, Incorporated, Railway, New Jersey, USA. Speaking on today's call will be Rob Davis, Chairman and Chief Executive Officer, Caroline Litchfield, Chief Financial Officer, and Dr. Dean Lee, President of Research Labs. Before we get started, I'd like to point out that we have items in our GAAP results, such as acquisition-related charges, restructuring costs, and certain other items that we have excluded from our non-GAAP results. There is a reconciliation in our press release. I will also remind you that some of the statements that we make today may be considered forward-looking statements within the meaning of the safe harbor provision of the U.S. Private Securities Litigation Reform Act of 1995. Such statements are made based on the current beliefs of our company's management and are subject to significant risks and uncertainties. If our underlying assumptions prove inaccurate or uncertainties materialize, actual results may differ materially from those set forth in the forward-looking statements. Our SEC filings, including Item 1A and the 2024 10K, identify certain risk factors and cautionary statements that could cause the company's actual results to differ materially from those projected in any of our forward-looking statements made this morning. Merkin Company Incorporated, Rodway, New Jersey, USA, undertakes no obligation to publicly update any forward-looking statements. During today's call, a slide presentation will accompany our speakers' prepared remarks. These slides, along with the earnings release, today's prepared remarks, and our SEC filings are all posted to the Investor Relations section of our company's website. With that, I'd like to turn the call to Rob.

Thanks, Peter. Good morning, and thank you for joining today's call. Our company's purpose to save and improve lives guides everything we do. In 2025, we advanced key programs across all phases of development, furthering our mission to deliver transformative medicines and vaccines that will improve health outcomes for patients around the world. I'm very proud of the significant progress we are making. As we look ahead, we'll remain intently focused on bringing forward breakthrough science and innovation, which is the foundation for creating sustainable, long-term value for both patients and shareholders. The transformation of our portfolio is well underway, and momentum is building as we continue to execute on our strategy. In 2025, our business benefited from successful new product launches, the advancement of important clinical programs, and the expansion of our respiratory and infectious disease portfolios through the acquisitions of Rona Pharma and Sedera Therapeutics. As a result of this progress, we now have line of sight to over $70 billion of potential commercial opportunity by the mid-2030s, $20 billion more than just a year ago. and more than double Consensus 2028 peak Keytruda revenue of $35 billion. While we still have more to do, this meaningful progress further bolsters my already high competence and our ability to deliver sustainable growth post the Keytruda LOE period. Now, turning to our results and initial outlook for 2026. Growth in 2025 reflects demand for our innovative portfolio, including for Catruda, which continues to benefit more patients with cancer globally, increasing contributions from new launches in cardiometabolic and respiratory, as well as vaccines, and strong performance of animal health. We're well positioned to achieve commercial success across key products in 2026, while we make important investments behind our new product launches and expanded pipeline, which Caroline will speak to momentarily. Our research colleagues continue to achieve remarkable progress across our broad and deep pipeline. Focusing on a few key events from the fourth quarter, in cardiometabolic and respiratory, At AHA, we presented Phase III results for enlissatide that underscore the practice-changing potential of an oral PCSK9 inhibitor. Cardiovascular disease is the leading cause of death globally, and we look forward to bringing a potential new option to help address the CV epidemic. For WinRivere, we announced Phase II top-line findings from the CADENCE trial that are supportive of its continued development in a different type of pulmonary hypertension. And building on recent momentum in HIV, we shared positive top-line results for islotrevir in combination with darabarine for treatment-naive adults living with HIV. Finally, we're pleased that both Enlissatide and SAC-TMT, our investigational Trobe II-directed antibody drug conjugate, were granted commissioners' national priority vouchers by the FDA, which may expedite review of these important investigational candidates after applications are filed. We recently completed the acquisition of Sidera, which complements our portfolio and builds on our long legacy in combating infectious diseases. MK-1406, formerly CD388, is a potentially first-in-class, long-acting antiviral candidate designed to help prevent influenza infection in individuals at higher risk of developing serious complications. There is a substantial unmet need for influenza prevention in a large, at-risk population, and Phase 2 results were very promising. We believe MK1406 has greater than $5 billion in revenue potential and can be a meaningful driver of growth later this decade and through the next. We're excited to welcome the Sidera team to our company and look forward to advancing this novel preventative antiviral agent. Today, our business is anchored by an important set of commercial products that address critical unmet needs. We're also executing on the transformation of our portfolio with initial launches from over 20 potential new growth drivers that have the promise to advance the practice of medicine and change patient lives. Ten of these programs could be substantially clinically de-risked over the next two years and represent the majority of our $70 billion of non-risk-adjusted commercial opportunity by the mid-2030s. And our long-term outlook is further bolstered by the strong growth we expect in our animal health business, by the many early phase programs that will enter phase two in the near term, and through additional potential science-led, disciplined, and value-enhancing business development. We're entering a particularly robust period of first-time Phase III data readouts from novel candidates. In 2026, these include Islatrevir combined with Lenacaprevir, potentially the first once-weekly oral treatment regimen for people living with HIV. MK3000, potentially the first new mechanism of action in two decades for patients with certain retinal diseases. and Tulisa Kibart, where we expect to see phase 3 results in ulcerative colitis, as well as phase 2 data in other autoimmune diseases. There is an even richer array of expected readouts in 2027, including phase 3 results for SAC-TMT, which we believe is a differentiated trope 2 ADC. For IDXD, our B7H3 antibody drug conjugate, being studied in small cell lung cancer and other tumor types, for MK1406, as well as for a number of other important programs. In summary, we're successfully executing multiple product launches, making significant clinical advancements, and augmenting our pipeline with strategic business development. We're also making the necessary investments that will sustain our success over the long Our progress and momentum positions us to continue delivering on our purpose for patients and create durable value for shareholders. I want to recognize and thank our global teams for their commitment. While there is more to do, the actions taken, the progress we've made, and our continued disciplined execution provide me with strong confidence that we're well positioned for our next chapter of success. With that, I'll turn the call over to Caroline.

Thank you, Rob. Good morning. As Rob noted, in 2025, we made meaningful progress in benefiting patients and customers around the world with our portfolio of innovative medicines and vaccines. Our business delivered growth driven by continued strength in oncology and animal health, as well as increasing contributions from new product launches. These results demonstrate the enduring strength of our business and give us confidence in our outlook as we enter a period with many new launches. Our commercial and operational execution enable us to invest in discovering, developing, and launching the next generation of innovations, which will drive long-term value for patients, customers, and shareholders. Now turning to our fourth quarter results. Total company revenues were $16.4 billion, an increase of 5%, or 4%, excluding the impact of foreign exchange. The following revenue comments will be on an ex-exchange basis. In oncology, cells of the Keytruda family of products, which includes Keytruda and Keytruda Culex, increased 5% to $8.4 billion, with global growth driven by robust uptake in earlier-stage cancers and strong demand from metastatic indications. Utilization in tumors that primarily affect women, including breast, cervical, and endometrial cancers continues to be a key contributor to growth. In addition, we saw increased use of Keytruda in combination with PADCEF in locally advanced or metastatic urethelial cancer. In the US, growth was negatively impacted by approximately $200 million due to the timing of purchases. We are pleased with the positive provider feedback following the recent launch of Keytruda Qlex. As expected, sales in the quarter were $35 million. We look forward to having a greater impact on patients and healthcare systems following implementation of a permanent J-code in the U.S., which we continue to expect to occur in the beginning of April. Our broader oncology portfolio achieved another quarter of strong growth. Notably, Wellyreg sales increased 37% to $220 million, predominantly driven by increased use in certain patients with previously treated advanced renal cell carcinoma in the U.S., as well as continued uptake from ongoing launches in certain international markets. We look forward to potentially reaching more patients with renal cell carcinoma following positive data from the Lightspark 11 and 22 studies. In vaccines, Gardasil sales were $1 billion, a decrease of 35%, driven by lower demand in China and Japan. Other international markets grew 8%, benefiting from the timing of purchases. In the US, sales grew 7%, largely due to price. In pneumococcal, the Capvaxib launch continues to progress well, with sales of $279 million, driven by demand from both retail pharmacies and non-retail customers, including uptake from increased seasonal immunization activity in the U.S. In RSV, inflonsia sales were $21 million. Initial uptake has been constrained by a lower-than-expected infant immunization rate, coupled with high levels of total RSV monoclonal antibody inventory in the market. In cardiometabolic and respiratory, WinRiver continues to have a positive impact for patients with pulmonary arterial hypertension. Global sales were $467 million, a reflection of the continued strong demand for this important treatment. In the U.S., more than 1,500 new patients received a prescription, and over 27,000 total prescriptions were dispensed. We also saw an increase in the proportion of patients whose background therapies do not include a prostacycline. Outside the U.S., we continue to progress with securing approvals and reimbursement. We are excited to build upon the successful U.S. launch of O2Vare, a maintenance treatment for adults with COPD, with a novel mechanism of action. In the quarter, sales were $178 million, reflecting revenues following the acquisition of Verona on October 7th. We delivered strong growth in new patient starts and total patients treated. We also saw physicians prescribe Otover to more of their patients and an increase in the total number of prescribing physicians. As a reminder, we expect seasonality in the early part of the year as Medicare deductibles are reset. We are making investments to maximize the ongoing launch in the U.S. and look forward to benefiting more adult patients with COPD. Our animal health business delivered another quarter of strong growth, with sales increasing 6%. livestock sales grew 9% driven by higher demand across all species companion animal cells were flat as growth from new product launches was offset by a reduction in vet visits I will now walk you through the remainder of our P&L and my comments will be on a non-gap basis growth margin was 79.7% a decrease of of 1.1 percentage points due to higher infantry reserves, partially offset by favorable product mix. Operating expenses decreased to $6.8 billion. A charge of $150 million related to an agreement with Dr. Foltz Farmer to acquire sole global rights to MK8690 was lower than the $700 million in business development charges a year ago. Excluding these charges, operating expenses were flat, reflecting an increase in investment in support of our innovative pipeline and key growth drivers, offset by the benefits of our multi-year optimization initiative. Other expense was $226 million. Our tax rate was 15.4%. Taken together, earnings per share were $2.04. Now turning to our 2026 non-GAAP guidance. We expect revenue to be between $65.5 and $67 billion, representing growth of 1 to 3%, including a positive impact from foreign exchange of approximately 1 percentage point using mid-January rates. Our gross margin assumption is approximately 82%. Operating expenses are assumed to be between $35.9 and $36.9 billion, which includes a one-time charge of approximately $9 billion related to the acquisition of Sidera. As a reminder, our guidance does not assume additional, significant potential business development transactions. Other expense of approximately $1.3 billion includes financing costs for Sidera and Verona. We assume a full-year tax rate between 23.5% and 24.5%, which reflects the non-tax-deductible one-time charge for Sidera. We assume approximately 2.48 billion shares outstanding. Taken together, we expect EPS of $5 to $5.15, with a midpoint of $5.08, including a positive impact from foreign exchange of approximately $0.10 using mid-January rates, excluding approximately $3.65 per share related to the upfront charge for the acquisition of Sidera, as well as $0.30 per share of ongoing costs to advance MK1406 and finance the transaction, our midpoint would be $9.03. As you consider your models, there are a few items to keep in mind. We expect to deliver growth in 2026 driven by increasing contributions from our new launches, as well as continued strength in oncology and animal health, despite a headwind of approximately $2.5 billion from generic competition, IRA price setting, and the restructured agreement for Cicelugo. Generic competition primarily impacts the Genuvia family of products, Rydion, and Deficit. We also expect significantly lower sales of Le Gevrio due to continued soft demand. Now turning to capital allocation, where our strategy remains unchanged, we will prioritize investments in our business to drive near and long-term growth, including new product launches and our robust pipeline. We remain committed to the dividend with the goal of increasing it over time. Business development remains a high priority. We are well positioned to pursue additional transactions when science and value align. Our guidance assumes approximately $3 billion of share repurchases, and we remain committed to not having excess cash billed on the balance sheet. To conclude, we enter 2026 with confidence in the outlook for our business, driven by global demand for our innovative medicines and vaccines, including the exciting progress of our many launches and upcoming clinical milestones from our promising pipeline. We maintain our longstanding commitment to bringing forward medically significant innovations that will enable us to deliver value to patients, customers, and shareholders well into the With that, I'd now like to turn the call over to Dean.

Thank you, Caroline. Good morning, everyone. Progress continues across programs spanning multiple therapeutic areas. Today, I will provide updates across cardiometabolic and respiratory, infectious disease, and oncology programs, then conclude with a summary of highlights from 2025 and upcoming milestones for this year. Starting with advancements across our cardiometabolic and respiratory pipeline and programs. Elicitide, our investigational oral PCSK9 inhibitor, has been designed to deliver antibody-like efficacy while offering a simple, once-daily oral treatment option with the potential to help address the CV epidemic. Data from two Phase III studies evaluating Elicitide for the treatment of adults with elevated LDL cholesterol were presented at the American Heart Association scientific sessions in November. In both the coral reef lipid study, which included a broad population of adults with or at risk for atherosclerotic cardiovascular disease on background lipid lowering therapies or with statin intolerance, and the coral reef HEFH study in adults with familial, heterozygous, hypercholesterolemia, and licitide demonstrated statistically significant sustained reductions in multiple atherogenic factors, including LDL-C, ApoB, non-HDLC, and Lp-little-A. The findings from the Coral Reef HEFH were published in the Journal of the American Medical Association and from Coral Reef Lipids have been accepted to the New England Journal of Medicine. In addition, positive results of the third Phase III trial, Coral Reef Add-On, evaluating and elicitide comparing to other oral non-statin therapies in adults with hypercholesterolemia and treated with a statin, will be presented at the American College of Cardiology Congress in March. The Phase III Coral Reef Outcome Study is ongoing and fully enrolled. For WinRivir, we continue to make progress on our global regulatory strategy. Last month, the European Commission approved an expanded indication in adults with pulmonary arterial hypertension with WHO functional class 2, 3, and 4 based on the phase 3 zenith study. We are continuing to evaluate WinRivir in an additional indication associated with progressive vascular remodeling and resistance. The Phase II cadence study met its primary endpoint, achieving statistically significant and clinically meaningful reduction of pulmonary vascular resistance compared to placebo in adults with combined post- and precapillary pulmonary hypertension due to heart failure with preserved ejection fraction. These findings support proof of concept which will inform a Phase III program in this population. Detailed results will also be presented at the American College of Cardiology Congress in March. Next, infectious disease. Last month, we completed the acquisition of Sidera Therapeutics. The scale of the ongoing seasonal flu outbreak in the Northern Hemisphere reinforces the threat posed by influenza, the corresponding burden on healthcare systems, and importantly, the need for improved prevention strategies strategies specifically for those individuals at high risk of serious complications. The Phase 3 Anchor Study, evaluating MK1406, a potentially first-in-class, long-acting, preventative, strain-agnostic antiviral with a differentiated mechanism of action, completed enrollment in November in the Northern Hemisphere. In parallel, we will enroll participants in the Southern Hemisphere to ensure the collection of a robust data set spanning a broad patient population, including adults who are immunocompromised and to capture additional data on diverse circulating strains. Furthermore, it is also important for the study to encompass those who have been vaccinated against the flu and those who have not. Turning to HIV, in November, we announced positive top-line results for our investigational, once-daily, single-tablet, two-drug regimen of Deroverine and Islativir, a next-generation nucleoside analog leveraging translocation inhibition from a Phase III study in previously untreated adults with HIV-1 infection. This is the first two-drug regimen without an HIV-integrated strand transfer inhibitor to demonstrate non-infero-efficacy and safety versus the broadly used three-drug INSTE-based regimen, Victarvi. Based on its potent antiviral properties and barrier to resistance, it is our ambition that Islativir will serve as a novel anchor medicine across multiple two-drug treatment regimens, providing new daily and weekly options for people living with HIV. Detailed results will be presented at an upcoming Medical Congress. Moving to oncology, data continued to demonstrate Keytruda's impact in treating a wide spectrum of cancers. In bladder cancer, there were two recent notable developments. First, the FDA approved Keytruda and Keytruda Culex, each in combination with PADCET, as neoadjuvant treatment and continued after cystectomy as adjuvant treatment for adults with muscle-invasive bladder cancer who are ineligible for cisplatin-containing chemotherapy based on the Phase III Keynote 905 trial. This is the first PD-1 inhibitor plus antibody drug conjugate regimen approved for this population. Second, we announced positive top-line results from the Phase III Keynote B15 study. The combination of Keytruda plus Patsive, given as neoadjuvant and adjuvant treatment, demonstrated statistically significant and clinically meaningful improvements in event-free survival, overall survival, and pathologic complete response rates versus neoadjuvant chemotherapy and surgery. This is the first and only perioperative immunotherapy plus ADC regimen shown to extend survival for cisplatin-eligible patients with muscle-invasive bladder cancer. Detailed results will be presented later this month at the ASCO Genitourinary Cancer Symposium. Together, these regimens have the potential to offer patients with muscle-invasive bladder cancer who are either eligible or ineligible for cisblattin chemotherapy, a Keytruda-based option. Three additional Phase III studies are ongoing evaluating Keytruda across different stages of bladder cancer, including Keynote 992, Keynote 866, and Keynote 676. In collaboration with Moderna, we recently announced five-year follow-up data for the Phase IIb Keynote 942 study evaluating intezomirant autogene, an individualized neoantigen therapy candidate in combination with Keytruda in patients with high-risk stage 3 or 4 melanoma following complete resection. In the follow-up analysis, the study demonstrated a sustained improvement in recurrence-free survival with a 49% reduction in the risk of recurrence or death compared to Keytruda alone, building on the previously announced primary and three-year analyses from the trial. The Phase III InterPATH-001 trial in adjuvant melanoma is ongoing and fully enrolled. In November, the European Commission approved a subcutaneous injection of pembrolizumab and barohyleronidase alpha, marketed in the EU as Keytruda SC, for use in all 33 Keytruda indications for adult patients. It is the first and only subcutaneous immune checkpoint inhibitor in Europe that can be administered in one minute every three weeks or in two minutes every six weeks. The availability of more rapid subcutaneous pembrolizumab administration is being integrated into our clinical development programs. Canolit-007, a Phase III study evaluating codiracip, an investigational oral selective KRAS G12C inhibitor in combination with Keytruda Culex for the first-line treatment of patients with KRAS G12C mutant advanced or metastatic non-squamous non-small cell lung cancer. In December, at the American Society of Hematology Annual Meeting, we highlighted progress across our hematology pipeline with positive data spanning multiple candidates, including MK1045, an investigational CD19, CD3 T-cell engager in adults with relapsed or refractory B-cell acute lymphoblastic leukemia, Nantagrutinib, an investigational non-covalent BTK inhibitor in patients with chronic lymphocytic leukemia or small lymphocytic lymphoma, and Boma-Dempstead, an investigation of LSD-1 inhibitor in patients with polycythemia vera who were resistant or intolerant to cytoreductive therapy. In addition, there are two ongoing Phase III studies evaluating Boma-Dempstead in essential thrombocythemia, an orphan disease. 2025 was marked by significant pipeline progress, including positive data announced from 18 Phase III trials and the initiation of 21 Phase III trials spanning cardiometabolic and respiratory, immunology, infectious disease, oncology, and ophthalmology. We also secured regulatory approvals across therapeutic areas, including, in oncology, Keytruda Culex, and additional Keytruda-based regimens, including in patients with cisplatin ineligible MIBC and locally advanced head and neck squamous cell carcinoma. In infectious disease, Amplansia, our long-acting monoclonal antibody for the prevention of respiratory syncytial virus, lower respiratory tract disease in infants born during or entering their first RSV season. And in cardiovascular, the label update for WinRivir in PAH. Finally, we continue to deliver on our one-pipeline strategy by leveraging our clinical expertise and robust business development capabilities. The acquisition of Verona Pharma and Sidera therapeutics, further strengthen our pipeline, and bring forward promising candidates with the potential to serve areas of significant unmet patient need. Building on our momentum in 2025, we anticipate a series of milestones across multiple therapeutic areas in the coming months, including, in oncology, the February 20th PDUFA date for certain patients with platinum-resistant recurrent ovarian cancer based on the keynote B96 trial. Presentation of detailed findings at ASCO-GU for Wellareg, our first-in-class oral HIF2-alpha inhibitor across adjuvant and certain types of advanced renal cell carcinoma based on the Phase III LightSpark 11 and 22 trials, and for Keno B15 in cisplatin, eligible patients with MIBC. In HIV, the April 28th Pidufa date for Duraverine and Islativir, a once-daily oral two-drug treatment regimen, and top-line data from the Phase III ISLEND-1 and 2 trials evaluating Islativir and Lenacapivir as a once-weekly oral two-drug treatment regimen in collaboration with Gilead. In cardiometabolic and respiratory, the presentation of detailed results at ACC in March. For WinRivir, from the Phase II cadence study in a subset of pulmonary hypertension due to left heart disease. And for Elicitide, from the Phase III coral reef add-on trial. In immunology, data for TULIS-OCOBART, or TL1A inhibitor, based on the Phase III ATLAS-UC trial in ulcerative colitis, and Phase II Athena study in SSC-ILD. Finally, in ophthalmology, data from the Phase III Brunella study of MK3000 are novel Wnt agonists being evaluated in diabetic macular edema, and the Phase II Rioja study of MK8748 are potential first-in-class TIE-2 agonist the EGIF inhibitor, being evaluated for the treatment of certain retinode diseases. We continue to advance our diversified pipeline with a focus on executing with speed and rigor. I look forward to providing further updates through 2026. And now, I turn the call back

to Peter. Thank you, Dean. Surely, we're now ready for Q&A. We have a hard stop today at 10 a.m., so I'd like to request that analysts limit themselves to one question, please.

Ladies and gentlemen, if you wish to ask a question, please press star 1 on your telephone keypad. You may withdraw your question at any time by pressing star 2. If you're using a speakerphone, please pick up the handset before pressing the number. Once again, if you have a question, you may press star 1. And one moment, please, for our first question. Our first question comes from Mohit Benzel with Wells Fargo. Your line is open. You may ask your question.

Great. Thank you very much for taking my question, and congrats on all the pipeline progress. Maybe if we can double-click on the CD388 asset and potential for interim here. So the full season appears to be strong this season, so it would seem like that event rates may be occurring ahead of the plan in the anchor trial. But we'd love to understand your thoughts around running the full trial. Is it based on generating robust data across two geographies, two seasons, or anything you are seeing from the event rates point of view, the ongoing trial. And should we expect an interim disclosure in March or after March or not?

Thank you very much. This is Dean. I do think your point about the relatively severe season, especially for many of us in the Northeast for the flu, demonstrates how important this month could be. We have completed enrollment in the Northern Hemisphere. I want to emphasize, as I said in the prepared, We are in parallel recruiting in this Southern Hemisphere. This is an event-driven trial. I want to have the right trial size. I want the powering of the assumptions. But most importantly, I need to make sure that I have strong data throughout a series of subpopulations that will be important for the future label. So at this time, we have not spoken to communication plans following IA. But, you know, we are excited about this first-in-class, once-per-season, strain-agnostic antiviral agent, which I think will have increasing need as the years go by.

Great. Thanks, Moet. Next question, please.

Thank you. Our next question comes from Makash Tiwari with Jeffries. Your line is open. You may ask your question.

Hey, thanks so much. Are there any plans to explore SAC-TMT in a first-line NSCLC setting in PD-1 low-expressing patients or head-to-head against the Keynote 189 regimen, given some of the emerging data you're seeing out of China? I'm kind of curious why your Trobe 2 development strategy seems to be relatively conservative versus what AstraZeneca and Daiichi are exploring, especially if you have a differentiated asset.

Thank you very much for that question. So as we've said repeatedly, we think this is a workhorse ADC. We also think that, you know, I look at the HER2 field and I sit there and I go, you just changed the linker and the payload and all of a sudden you have very different readouts from an antibody drug conjugate. And so we think SAC-TMT has the potential to be best in class trope to directed ADCs. You know, what I would say when you talk about the ambition, I mean, we have 16 phase three studies. Eleven that we view are first in class, the other five are differentiated. So I just, I think we're very ambitious with our SAC-TMT program. In relationship to the specific question, in relationship to non-small cell lung cancer and breast cancer, we think that we have differentiated approaches to others. But most important, we also have it in tissue types and tumor types where we are hoping to be first. So I would challenge a little bit the characterization that we do not have a robust and ambitious program. We have 16 phase three studies.

Thank you, Akash. Next question, please, Shirley.

Thank you. Our next question comes from Alex Hammond with Wolf Research. Your line is open.

Thanks for taking the question. So consensus currently anticipates Keytruda's U.S. LOE to occur in 28. However, Merck's SEC filings suggest potential for two additional patents that expire in 29. So, I guess, how should we model the IP runway for Keytruda, and how should we think about the timing associated with QX's ramp prior to Keytruda's IV biosimilar introduction?

Yeah, thanks for the question. As you look at the intellectual property situation for Catruda, when the original invention was filed for approval with the patent office, there were actually four patents that made up the patent estate that was the original innovation. One of those is the compound patent, which expires December of 2028. Two of those, one method of making patent, actually is extended out to May of 2029. And the second one, a method of use patent, goes out to November of 2029. And so, as we looked at this, initially, we were conservative in our assumptions and always based off the compound patent, always, though, with the intent that we would defend the entire patent estate. I think what has evolved over time is that as case law has emerged, our confidence that we will be able to defend those additional two patents has grown, and thus there is a potential that you're going to see protection actually make it through either May or November of 2029. For planning purposes, we continue to assume 2028 because I think that's a conservative assumption, and we'll have to see where it goes. And I would also remind you that we do face the IRA as of the beginning of 2029. As we think about the QLEX adoption. We continue to think we're going to see 30% to 40% adopted as you get out to 2028, and we will drive that as high as we can. And as you know, we have priced this to drive for the adoption from Keytruda IV to QLAC. So that will continue. That strategy is underway, and frankly, whether it's 28 or 29 does not change the strategy we're following. Great. Thanks, Alex. Next question, please.

Thank you. Our next question comes from Evan Siegerman with BMO Capital Markets. You may ask your question.

Thank you so much for taking my question. I want to touch on the HIV data that you were discussing. You know, can you just contextualize the importance of a dual regimen versus the standard of care of Bictagravir or Bictarvi, and kind of what's the feedback in more broadly unmet need for a dual regimen versus the standard of care of triple?

Yeah, so thank you very much for that question. So as you highlight, we're really excited about Azlotrevir because we really think it's a next-generation nucleoside analog. So leverage is a unique mechanism of translocation inhibition that gives it high potency and a high degree of resistance. In relationship to two drugs and three drugs, there have been always a need for different options. You see it already. There is a two-drug regimen out there in relationship to three-drug, and there have been considerable switching that occurs in this patient population just as a general rule. So the ability to send a different sort of repertoire of compounds, especially if you can spare the integrase, would be potentially very important. For some people, that's often viewed in light of metabolic and long-term issues with HIV treatment. So I think there will be an excitement of having a two-drug combo without an INSTI backbone. Equally important, I just want to make sure, is we're driving a two-drug regimen for the first Q-weekly offering. And we have one with our partners, Gilead, and we have another one with eulovirfinine. So I think all of those, that two-drug for daily, but also that two-drug for weekly, is something. There's no weekly three-drug or two-drug. So we think there will be an important opportunity for patients to experience a Q-weekly option. And finally, we have a Q-monthly PrEP oral PrEP. There is no other Q-monthly oral PrEP. Although it's not islactivir, it's a related compound, which is MK8527.

Great. Thanks, Evan. Next question, please, Shirley.

Thank you. The next question comes from Steve Scala with TD Cowan. You may ask your question.

Thanks so much. A bigger picture question for Rob. But in 2025, Merck achieved the sales guidance it provided to start the year, and you dealt with the Gardasil pressures all year long. But in any year for any company, there will be some challenges, so this is likely to be more of the rule rather than the exception. And Merck has some growth products too. So in what might be a typical year, Merck grew minimally, and in 2026 you are again looking for minimal top-line growth with the future to LOE still a couple years off. So the question is, is this what we should expect from Merck going forward, a company that grows modestly in good times and significantly pressured in less good times, or can Merck achieve sustainable, strong sales growth in the decade ahead despite what will be inevitable challenges? Thank you.

Yeah, no, Steve, I appreciate the question. I would just reemphasize as we look forward and I think what you're hearing in our confidence and why we think over time we will be a strong growing company. So I'm not sure I agree with your characterization that we will be a modest growing company in every year or less depending on what happens. That's, I think, taking one year out of context. But if you look over the longer term, that $70 billion we have of potential is significant when you think that that is, as you look at it, it's more than double what Catruda will be at its consensus peak in 28 of $35 billion, and importantly, $20 billion higher than where we were, and driven by probably the broadest and widest pipeline we've had in years. So our belief in our ability to have sustainable growth once we get post the LOE is as high as it's ever been, and we're not done. We have early-stage pipeline assets that we believe we'll be reading out in the next two years and will allow us to continue to bring some of those assets into this period, plus additional business development. And as you know, none of this includes the animal health business, which we expect to more than double out to the mid-2030s, as well as the base of Keytruda over time. So I think that's important to understand. And the other thing I'd highlight, of the $70 billion, we're going to de-risk substantially all of that by the time we get to the end of 2027. So you'll know the portfolio that's going to drive our growth into the next decade by the time you get out to 2027. 2027. And that's, I think, also important as people start to want clarity on the long-term future. The last thing I would just add, if you look at 2025 as an example, what we saw in the quarter is really a strong growth profile. And as you look forward, if you adjust for the LOE period we had that we've noted with Genuvia, with Dificid, with Brideon, plus LeGavrio and Cosa Lugo, we actually are giving guidance of growth in, I think, the 4% to 7% or roughly 5% to 8% range over time, which actually is pretty strong growth. And, you know, I think that is more the focus. What is the sustainable strategic growth of those assets long-term, not what are the one-time non-strategic LOEs we're facing this year? Great. Thanks, Steve. Next question,

please. Thank you. Our next question comes from James Chin with Deutsche Bank. Your line is open. Let me ask your question.

Thank you for the question. One for Dean. On Cadence's ACA presentation, can you help level state what we should and should not expect to learn? Also, any color on which potential endpoints may be explored in the Phase 3 for CPC-PH due to half-tests?

You broke up for a little bit there, so I'll hope that I answer your questions. I think we'll provide the data from that Phase 2. There's a primary endpoint, but there's also important secondary endpoints that will also be provided. In relationship to what you've just asked in terms of a future phase three that we've discussed, we're in the middle of those discussions with the FDA. And I think, you know, just as a general sort of statement, generally, you know, we'll have to think about things like functional activity. You often have clinical events that will be important. There'll be biomarkers. But it will be very important to align with the FDA because in this patient population, which should be an orphan indication patient population, we'll have to level set as to how one thinks about the outcomes and the primary secondary endpoints. But we're eager to provide that data at ACC, and we're continuing to have discussions with the FDA as we define, essentially, a new population that we're going to target with this drug. And so some of the questions you had in terms of the endpoints are things that are important discussions right now. Great. Thanks, James. Next question, please.

Thank you. And this question comes from Carter Gold with Cantor. Your line is opening me ask your question. Great. Good morning. Thanks for taking the

questions. Another one for Dean. I recognize on your TL1A the near-term focus is on Atlas UC. At the same time, we're seeing the insurance dial 23 players step up sort of all sorts of combinations and as well as multi-specifics rapidly intensify their efforts with, you know, pretty sizable partnerships. So again, recognizing Atlas UC is a near-term focus, but how does Merck think about the importance and speed it may need to pursue combinations on the back of those data later

this year. Thank you. Yeah, so, you know, I love your question, just so that we all level set. Essentially, in this field, you know, TNF and IL-23 has dominated, and the big question is whether there's a third node or a third class, which is TL1A, and our ambition is to be the first and best-in-class TL1A. We're studying it in six diseases, but as you highlight, it is the ulcerative colitis and the Crohn's disease that's coming up very quickly. If those are successful, like in every immunology indication, the question will become patient populations, other diseases, but then people will start talking about combinability. They'll talk about combinability in terms of two separate antibodies, they'll talk about bispecifics, and increasingly they'll talk about orals. And I can assure you that that concept of we intend to be first and best, but also that we have a robust plan for being next is well in line, but that's probably something that I don't want to say on a public call at this time.

Thank you, Carter. Next question, please.

Thank you. Our next question comes from Jeff Meacham with Citi. You may ask your question.

Hey, guys. Morning, and thanks for the question. Another one on wind revere. So you're about to hit two years on the market. Can you guys speak to trends on duration of therapy or maybe real-world safety tolerability, and if anything, is different versus phase three? And then beyond cadence, how are you guys thinking about related pulmonology indications, just where the mechanism may have an impact? Thank you.

So I'll start. There were a lot of questions from a scientific standpoint, but I just want to emphasize that Wynrevere is reshaping the standard of care in PAH. It's doing it because it is a differentiated pathway and a molecule. All the other drugs, you would look this, and you would say they're classic vasodilators. This is a drug that gets to the underlying biology through the genetics. And the way that I would actually begin to think about Wynrevere and what WinRivir may be doing to right heart failure and PH is similar to what Merck showed for ACE inhibitors back in the day in relationship to left heart failure. So when you ask me that question, I'm sitting there like, I think we are already reshaping the standard of care. I would imagine guidelines will be coming out and will be shaped by that clinical data. In relationship to adverse effects and long-term treatment, you know, I actually just came from a tour in Texas of sites, and they're quite bullish on not only the drug but also the sustainability and the concept that all of a sudden they begin in their minds talking about, you know, cardiac, blunting, cardiac remodeling. So that's with this. We are advancing in relationship to heart failure, as the previous question did in Cadence. But I love your question because much of it is focused on what is the stress on the right heart. And as you point out, there could be pulmonary indications where you get pulmonary hypertension that we have to think carefully about where and when to use this drug. But there are investigators who have posed that question to us. And they also pose the question that when you look at PH, there's different patient populations, but quite a number of them have connective tissue disorders. So they immediately go, you know, connective tissue disorders are also related to pulmonary fibrosis and other pulmonary disease. So those are discussions, and those are things that people are exploring as we speak, and we will see some of those data, and that will guide our decisions in the future.

And maybe, Jeff, I would just add, if you look at where we are to date, and just to give you a sense of the breadth, we have over 110,000 prescriptions which have been dispensed. There's now over 9,100 patients who have started therapy. And if you look, our overall compliance continues to be quite high. We are seeing a slow increasing in the rates of discontinuation, but frankly it's generally in line with what are slightly better than what we're seeing with other pH products. And so we feel good about where that is. And then on the safety side, we continue to be very confident in the safety profile, and it's consistent with label. And I'd also point out now, as you've seen across what we've reported with Hyperion as well as with Zenith and then looking back at Stellar and then what we've also brought forward is some of the long-term data from Soteria. Across all of those, the safety profile is very consistent. And so we feel very good about where we are with compliance, where we are with safety. Everything's tracking as you would expect. Great. Thanks, Jeff. Next question, please.

Thank you. Our next question comes from Umar Rathas. With Evercore, your line is open. You may ask your question.

Morning, guys. Thanks for taking my question. Rob, I'm trying to balance today the fact that you're laying out a $70 billion non-risk-adjusted revenue opportunity for the current pipeline, as well as all the prior track record of sort of $5 billion revenue opportunities acquired for about $10 billion or under, versus the large deal that's been in the

press lately. I'm just trying to balance it all. Yeah, Umar, I appreciate the question. You know, obviously, we don't comment or speculate on market rumors. If you look at our BD strategy and where we are. I would start by just pointing to the fact that, as you highlight, with the $70 billion of commercial potential we've highlighted and the fact that that's $20 billion better than where we were a year ago, I am very proud of the progress we're making, and it's why my confidence is so high. And obviously, we still have more time to continue to do more, both in terms of advancing our early-stage pipeline, which we think can have impact in this area, as well as adding additional assets through BD, which we've indicated we are continuing to be very interested in doing. If you look at where we're focused, it's where we've always said, which is for opportunities where we see significant scientific advancement, addressing an unmet need, aligned with our strategy, and importantly, where we see value creation. Where we see those things align, we move, but we've always done it with discipline. You've seen that across all the deals we've done, and we will continue to do so as we move forward. Obviously, looking in the area, up to $15 billion is our sweet spot. But as we've also highlighted, for the right scientific deal, we'd go bigger. But using the same methods, the same discipline, the same approach, we've used across everything we've done to date. Great. Thanks, Sumer. Next question, please.

Thank you. Our next question comes from Chris Schott with J.P. Morgan. You may ask your question.

Great. Thanks so much. Just on MK3000, it's obviously a new mechanism, but also listed as one of your key near-term products for de-risking that $70 billion. Can you just help set the stage a little bit in terms of what gives you such confidence in this asset and how large of an opportunity you see, assuming we get some positive data this year?

I'll let others speak about how big the opportunity is. But, you know, diabetic macular edema and wet age-related, I'm sorry, AMD and DME are really important indications and have important molecules out there. They are all based on vascular endothelial growth factor. This is the first pathway that is based on the genetics of vascular stability in the eye. And we have the first agonistic antibody towards that. So we're really interested in seeing whether this mechanism will work because it will be the first non-vascular endothelial growth factor that's going to be driving to the indications of age-related macular degeneration and diabetic macular edema. Just historically, up to 40% have individuals have suboptimal response to VEGFs. We think that that's an important opportunity for us. But I also want to just make sure that people recognize that even in patients who have responses to vascular endothelial growth factor, MK3000 could also be part of the repertoire with which they're treated as well.

And maybe just to add, Chris, to some thoughts here on market potential. As you know, if you look at what you see with diabetic macular edema, there is about 1.6 million people with DME today in the United States. It's the leading cause of vision loss due to diabetes. And I'd add you've got, with wet AMD, an additional 1.5 million patients in the United States. So if you look across the total of that market, that's about a $15 billion market. And as Dean just pointed out, 30% to 40% of patients are only partially or not responsive at all to anti-VEGF therapy. So the opportunity to bring a new mechanism into this space is quite meaningful. And the only thing I'd add is while you're speaking about NK3000 in DME now, We are also studying it in wet AMD and RVO, and importantly, we have MK8748, which is the novel bispecific antibody that agonizes TIE2 while inhibiting VEGF. We're very excited about that. It's really the combination of both of those assets that why we believe this is a greater than $5 billion opportunity as we look forward, and I would say it's probably one of the more underappreciated areas, I think, from the street and what this really can be.

Great. Thanks, Chris. We're going to try and squeeze in one more question, please, Shirley.

Thank you. Our question comes from Dana Graybosch with Levering Partners. Your line is open.

Hi. Thanks for the question. I'll finish with a SAC-TMT one. I wonder if you could update us on your biomarker strategy, given a Trope 2 ADC competitor recently announced they're changing some primary endpoints of Phase 3 to narrow on Trope 2 expressors. I know you guys are cooking something, and will we see that in any of the phase threes? Yeah, I'll just kind of answer

the question the way that I answered it a few years ago, which is we think that SAC-TMT has an ability to be best in class, but it's also important to put it in the right tumor types and to have the right strategy in those tumor types. There will be tumor types where we do not believe that a biomarker will be needed, but we also believe that there are places where that biomarker will be needed, especially if you look at how good the comparator you have to go against. So a lot of it is context dependent on the tumor, but also what other treatments are there and how

high of a bar you have to beat to beat that comparator. Great. Thank you, Dana. And thank you all for your time and attention this morning. If you have any follow-ups, please reach out to the IR team. Take care.