Q2 2026 Denali Therapeutics Inc Earnings Call

August 6, 2026

Operator: Good day, thank you for standing by. Welcome to the Q2 2026 financial results and business highlights. At this time, all participants are in a listen-only mode. After the speaker's presentation, there will be a question and answer session. To ask a question during this session, you will need to press star one one on your telephone. You will then hear an automated message advising your hand is raised. To withdraw your question, please press star one one again. Please be advised that today's conference is being recorded. I would now like to hand the conference over to your speaker today, Laura Hansen. Please go ahead.

Operator: Good day, thank you for standing by. Welcome to the Q2 2026 financial results and business highlights. At this time, all participants are in a listen-only mode. After the speaker's presentation, there will be a question-and-answer session. To ask a question during this session, you will need to press star one one on your telephone. You will then hear an automated message advising your hand is raised. To withdraw your question, please press star one one again. Please be advised that today's conference is being recorded. I would now like to hand the conference over to your speaker today, Laura Hansen. Please go ahead.

Speaker #1: then hear an automated message advising your hand is raised. To withdraw your question, please press star 11 again. today's conference is being recorded. I would now like to hand the conference over to your speaker today, Laura Hansen.

Speaker #1: ahead.

Laura Hansen: Good afternoon, everyone, thank you for joining us today to discuss Denali Therapeutics' Q2 2026 financial results and business highlights. Earlier today, we issued our earnings press release and filed our quarterly report. The press release, financial tables, and today's presentation are available in the investor relations section of our website. Before we begin, I would like to remind everyone that today's discussion will include forward-looking statements. These statements are based on our current expectations and are subject to risks and uncertainties that could cause actual results to differ materially. Please refer to our SEC filings and the cautionary language in today's press release and presentation for a discussion of these risks. Denali undertakes no obligation to update these forward-looking statements except as required by law.

Speaker #2: for joining us today to discuss Denali Therapeutics' second quarter 2026 financial results and business highlights. Earlier today, we issued our earnings press release, and filed our quarterly report. release, financial tables, and today's presentation are available in the investor relations section of our website.

Laura Hansen: Denali undertakes no obligation to update these forward-looking statements except as required by law. Joining me today are Ryan Watts, our Chief Executive Officer, Katie Peng, our Chief Commercial Officer, Alexander Schuth, our Chief Operating and Financial Officer, and Peter Chin, our Chief Medical Officer and Head of Development. Ryan will begin with opening remarks. Katie will provide an update on the US launch of AVLAYAH. Ryan will return to discuss pipeline highlights, Alex will review our financial results. Peter will join the team for the question-and-answer session. Ryan.

Laura Hansen: Joining me today are Ryan Watts, our Chief Executive Officer, Katie Peng, our Chief Commercial Officer, Alexander Schuth, our Chief Operating and Financial Officer, and Peter Chin, our Chief Medical Officer and Head of Development. Ryan will begin with opening remarks. Katie will provide an update on the US launch of AVLAYAH. Ryan will return to discuss pipeline highlights, Alex will review our financial results. Peter will join the team for the question and answer session. Ryan.

Ryan Watts: Thanks, Laura, thank you everyone for joining us today. We will begin on slide five. This was a transformative quarter for Denali. We completed the first full quarter of the AVLAYAH launch, advanced two Transport Vehicle-enabled Alzheimer's disease programs into clinical development, and further strengthened our financial position. Before I discuss those highlights, I want to begin with why we are here. At Denali, our purpose is to transform life for people living with serious diseases. That includes children and adults with rare genetic diseases such as Hunter syndrome, Sanfilippo syndrome, FTD-GRN, and Pompe disease. Well as the millions of people living with common neurodegenerative diseases such as Alzheimer's disease and Parkinson's disease. Across both groups, our mission is the same, to bring the power of biologic medicines to the brain. Slide six. The common challenge across many of these diseases is the blood-brain barrier.

Ryan Watts: For over a decade, we have built the Transport Vehicle platform to address that challenge by engineering biologic medicines to cross the blood-brain barrier through receptor-mediated transport. Earlier this year, that work reached an important milestone. Slide seven. With FDA approval of AVLAYAH, Denali became a commercial company and began delivering our first medicine to patients. For the Hunter syndrome community, AVLAYAH is the first new FDA-approved therapy in nearly 20 years and a new treatment option designed to reach both the body and the brain. Importantly, AVLAYAH became the first approved medicine developed using our Transport Vehicle platform and the first FDA-approved biologic specifically designed to cross the blood-brain barrier. For Denali, AVLAYAH is much more than a product. It is the first proof that our platform can progress from scientific concept to an approved medicine for patients. Slide eight.

slide 7 with FDA approval of Ava and Ally, became a commercial company and began delivering our first medicine to patients,

For the Hunter syndrome community, DNL310 is the first new FDA-approved therapy in nearly 20 years, and a new treatment option designed to reach both the body and the brain. Importantly, DNL310 became the first approved medicine developed using our Transport Vehicle platform and the first FDA-approved biologic specifically designed to cross the brain barrier.

For Denali abla is much more than a product. It is the first proof that our platform can progress from scientific concept to an approved medicine for patients.

Ryan Watts: We believe Denali today represents a powerful and differentiated combination to create significant value for patients, the healthcare system, and investors in the near and long term. We have a commercial product in AVLAYAH and an encouraging early launch. We have a broad clinical pipeline spanning rare genetic diseases and common neurodegenerative diseases, each with substantial market potential. We have a validated and scalable Transport Vehicle platform and scientific leadership in the field of BBB transport. We have the operational capabilities and financial strength to execute from discovery through development, manufacturing, and commercialization. Together, these attributes position Denali to create near-term growth and sustainable long-term value. Slide nine. Turning to the quarter, AVLAYAH generated $3.6 million in net product revenue in its first full commercial quarter.

Slide 8, we believed Denali today represents a powerful and differentiated combination to create significant value for patients, the Health Care system, and investors in the near and long term. We have a commercial product in Allah and encouraging early launch. We have a broad clinical pipeline standing, rare genetic diseases and common neurodegenerative diseases, each with substantial

Market potential.

We have a validated and scalable transport vehicle platform and scientific leadership in the field of BBB transport.

We have the operational capabilities and financial strength to execute from Discovery through development, manufacturing, and commercialization together. These attributes positions in a way to create near-term growth and sustainable long-term value.

Ryan Watts: The positive response from the Hunter syndrome community and the physicians caring for these individuals reflects years of partnership with patients, families, advocacy organizations, and clinicians. We could not have achieved this milestone without their unwavering commitment to advancing new treatment options. I also want to recognize the outstanding execution by our commercial team in the early stages of this launch. In the pipeline, DNL628 targeting tau and DNL921 targeting A-beta both advanced into clinical development for Alzheimer's disease, with initial clinical data expected in 2027. Following the sale of our priority review voucher in July, our pro forma cash equivalents, and marketable securities exceeded $1.1 billion. Slide 10. A key focus of today's call will be the AVLAYAH launch. Katie will walk through the early commercial indicators, what we are learning, and how we are building the foundation for continued growth.

Slide 9, turning to the quarter, ALYA generated $3.6 million in net product revenue in its first full commercial quarter. The positive response from the Hunter syndrome community and the physicians caring for these individuals reflects years of partnership with patients, families, advocacy organizations, and clinicians.

We could not have achieved this milestone without their unwavering commitment to advancing new treatment options. I also want to recognize the outstanding execution by our commercial team in the early stages of this launch.

0628 targeting towel and DNL, 921 targeting a beta, both Advanced into clinical development for Alzheimer's disease with initial clinical data expected in 2027 and following the cell of our priority review voucher in July our pro-forma cache cash, equivalents and marketable securities, exceeded, 1.1 billion.

Slide 10.

I can you focus of today's call will be the AA launch. Katie will walk through the early commercial indicators. What we are learning and how we are building the foundation for continued growth.

Katie Peng: Thank you, Ryan. On Slide 12, I'd like to start by reinforcing why we believe AVLAYAH is setting a new bar for the treatment of MPS II. For the first time, a therapy is designed to reach the whole body, including the brain, and can normalize key disease biomarkers both in the CNS and peripherally. These data continue to reinforce physician confidence and resonate with families, supporting the strong momentum we are seeing in the launch. Slide 12. Hunter syndrome represents one of the more prevalent mucopolysaccharidoses and affects a meaningful patient population within the rare disease community. The US opportunity is highly concentrated, with most eligible patients already identified and receiving conventional IDS enzyme replacement therapy at a relatively small number of specialized treatment centers. These are pediatric patients with pre-symptomatic or symptomatic neurologic manifestations who have not progressed to advanced neurologic impairment.

Thank you, Ryan.

On slide 12.

Setting a new bar for the treatment of mps2. For the First Time, a therapy is designed to reach the whole body including the brain and can normalize key disease biomarkers. Both in the CNS and periphery.

These data continue to reinforce physician confidence and resonate with families, supporting the strong momentum we are seeing in the launch.

July 12th.

Hunter syndrome represents one of the more prevalent mucopolysaccharidoses and affects a meaningful patient population within the rare disease community. The U.S. opportunity is highly concentrated, with most eligible patients already identified and receiving conventional I.V. enzyme replacement therapy at a relatively small number of specialized treatment centers.

Katie Peng: We estimate that there are approximately 2,000 patients worldwide in the addressable market, including approximately 500 prevalent patients with Hunter syndrome in the US. Based on the FDA-approved indication, approximately 75% of the US prevalent population, or roughly 375 patients, are currently eligible for AVLAYAH. In addition, about 30 children are born each year with Hunter syndrome, providing an ongoing opportunity to initiate treatment early. Our ongoing phase III COMPASS study is an important next step in advancing AVLAYAH, with the goal of supporting full approval and expansion of the label to include adults. Ultimately, our goal is to reach all eligible patients worldwide. Slide 13. Our launch is being executed against four core strategies. First, partnering closely with the Hunter syndrome community through a high-touch community-centered approach. In rare diseases, families often learn from and support one another.

These are pediatric patients with pre-symptomatic or symptomatic. Neurologic manifestations who have not progressed to Advanced neurologic impairment.

We estimate that there are approximately 2,000 patients worldwide in the addressable Market including approximately 500. Prevalent patients it with Hunters syndrome in the United States.

Based on the FDA approved indication approximately 75% of the US prevalent population or roughly 375 patients are currently eligible for Ada.

In addition about 30 children are born each year, with Henderson syndrome, providing an ongoing opportunity to initiate treatment early.

Our ongoing phase 3 compass study, is an important next step in advancing Abba with the goal of supporting full approval and expansion of the label to include adults.

Ultimately, our goal is to reach all eligible patients worldwide.

Slide 13.

Our launch is being executed against 4 core strategies. First partner and closely with the hunter syndrome Community through our high-touch community centered approach.

Katie Peng: We believe that positive experience with both AVLAYAH and the Denali team helps build trust, increase awareness, and encourage additional families to seek treatment. Second, helping physicians evaluate AVLAYAH and supporting treatment centers as they prepare to initiate therapy. Strong clinical conviction is creating urgency amongst physicians to switch eligible patients and engage payers to accelerate access. Third, helping each patient and family navigate the steps from prescription through their first infusion. Fourth, driving fast label-aligned coverage decisions that help remove payer roadblocks. After our first full quarter of launch, what has been particularly encouraging is how these four strategies have reinforced one another. Strong clinical conviction has driven physicians' and patient demand. That demand has accelerated payer coverage, and together, these dynamics are enabling more patients to begin therapy. Slide 14. Beginning with physicians, we entered the launch with a strong foundation.

In rare diseases families, often learn from and support 1 another. We believe that positive experience with both ABA and the Denali team helps build trust increase, awareness and encourage additional families to seek treatment.

Second, helping Physicians, evaluate at Leah, and supporting treatment centers as they prepare to initiate therapy. Strong clinical conviction is creating urgency among Physicians to switch eligible, patients and engage payers to accelerate access

Third, helping each patient and family navigate. The steps from prescription through their first infusion.

And forth driving fast label, align coverage. Decisions that help remove pair roadblocks.

After our first full quarter of launched, what has been particularly encouraging, is how these 4, strategies have reinforced 1. Another strong clinical conviction has driven Physicians and patient demands, that demand has accelerated payer coverage and together, these Dynamics are enabling more patients to begin therapy.

Slide 14.

Katie Peng: Before approval, more than 80% of physicians surveyed were already aware of AVLAYAH. 90% viewed the biomarker and clinical data as motivating to prescribe. Since approval, we have reached approximately 80% of targeted healthcare organizations with AVLAYAH's launch information through our field engagements, scientific exchange, educational webinars, and treatment center support. These activities have been highly impactful and are driving strong engagement across a significant number of treating physicians. Physicians constantly tell us that the ability to address neurologic manifestations is highly meaningful, and that most patients experience neurologic symptoms at some point during the course of their disease. That belief is translating into action, as many treatment centers with eligible patients are working with families to navigate reimbursement and transition patients to AVLAYAH. Slide 15. We have seen equally strong engagement from patients and caregivers.

Beginning with Physicians, we enter the launch with a strong Foundation.

Before approval, more than 80% of physicians surveyed were already aware of AA.

Ninety percent viewed the biomarker and clinical data as motivating to prescribe.

Since approval, we have reached Approximately 80% of targeted Healthcare organizations, with abla's launch information, through our field, engagements scientific exchange, educational webinars and treatment center support.

These activities have been highly impactful and are driving strong engagement across a significant number of creating Physicians.

Physicians constantly, tell us that the ability to address neurologic manifestations is highly meaningful and that most patients experience neurologic symptoms at some point during the course of their disease.

That belief is translating into action as many treatment centers with eligible. Patients are working with families to navigate reimbursement and transition patients to Aba.

Slide 15.

Katie Peng: Through our launch webinars focused on clinical data and access, as well as with Denali Patient Services, we reached more than 100 families. That represents greater than one-quarter of the eligible US patients. This high level of engagement reflects both unmet need in Hunter syndrome and the extent to which families have followed the development of AVLAYAH. We are also seeing families share their experiences through advocacy networks and local media, helping other members of the community learn about the availability of a new treatment option. Slide 16. One of the most powerful aspects of launch has been hearing directly from families and advocates about their experience with AVLAYAH and Denali. They have described the opportunity to begin AVLAYAH as a source of hope, and in some cases, as the possibility of gaining more meaningful time with their children. We are careful not to draw clinical conclusions from individual experiences.

We have seen equally strong engagement from patients and caregivers through our launch webinars focus on clinical data and access as well. As with Denali patient services. We reached more than 100 families that represents greater than 1 quarter of the eligible us patience.

Both the unmet need in Hunter syndrome and the extent to which families have followed the development of ABBA.

We are also seeing families share their experiences through advocacy networks and local media helping other members of the community. Learn about the availability of a new treatment option.

Slide 16.

1 of the most powerful aspects of launch has been hearing directly from families and Advocates about their experience, with Allah and Denali they have described the opportunity to begin ABA as a source of Hope. And in some cases as the possibility of gaining more meaningful time with their children,

Katie Peng: However, these stories illustrate how much the approval of AVLAYAH means to this community that has waited many years for a therapy designed to reach both the brain and the body. We are also hearing very positive feedback about the way the Denali team is supporting families and healthcare organizations. For many patients, initiating a new therapy involves coordinating physicians, infusion centers, insurers, specialty distributors, and patient services. Our team works closely with each family and treatment center to help them navigate those steps. The feedback from families and advocacy organizations has consistently highlighted the responsiveness, compassion, and partnership of the Denali team. That experience matters. It builds confidence in treatment, helps patients move through the access process, and supports continuity once treatment begins. Slide 17. Now turning to payer access. We have made exceptional progress during the Q1 of launch.

We are careful not to draw a clinical conclusions from Individual experiences. However, these stories illustrate how much the approval of AA means to this community and that has waited many years for a therapy designed to reach both the brain and the body.

We are also hearing very positive feedback about the way the Denali team is supporting families and healthcare organizations.

For many patients, initiating a new therapy involves coordinating physicians, infusion centers, insurers, specialty distributors, and patient services. Our team works closely with each family and treatment center to help them navigate those steps.

The feedback from families and advocacy. Organizations has consistently highlighted the responsiveness compassion and Partnership of the Denali team that experience matters to build confidence and treatment helps patients move through the access process and supports continuity. Once treatment begins

slide 17.

Katie Peng: Commercial policies covering more than 50% of lives have already been established. As with many rare diseases, a significant portion of MPS II patients is covered by Medicaid. Recognizing that not every state will publish a product-specific policy, 14 state Medicaid programs publicly listed AVLAYAH as covered. Separately, we are also seeing managed Medicaid policy align their coverage with commercial plans. These results compare favorably with early coverage achieved by analogous rare disease launches. Importantly, the absence of published policy does not mean a patient cannot obtain access. To date, physicians and families have successfully used prior authorizations, appeals, and medical exceptions while formal policies are being developed. The willingness of physicians to initiate these requests reflects their conviction in AVLAYAH, and our payer and patient access teams are working closely with them to move eligible patients towards treatment. Slide 18.

Now turning to payer access, we have made exceptional progress during the first quarter of launch commercial policies, covering more than 50% of lives have already been established.

As with many rare diseases, a significant portion of MPS2 patients is covered by Medicaid.

recognizing that not every state will publish a product specific policy, 14 State, Medicaid programs publicly listed at Leah as covered,

Separately, we are also seeing managed Medicaid policy. Align their coverage with commercial plans.

These results compare favorably with early coverage achieved by analogous rare disease launches.

Importantly, the absence of published policy does not mean a patient cannot obtain access.

To date, physicians and families have successfully used prior authorization appeals and medical exceptions, while formal policies are being developed.

The willingness of Physicians to initiate these requests. Reflects their conviction in Allah, and our payer and patient access teams are working closely with them to move eligible, patients towards treatment.

Katie Peng: We are extremely pleased with the trajectory of the US launch. In our first full commercial Q, we generated $3.6 million in net product revenue and secured commercial coverage for more than 50% of covered lives. Before discussing the outlook, I want to briefly address our approach to communicating launch dynamics and metrics. We understand that visibility is important to our investors, and we are committed to maintaining an open dialogue. There are many factors that influence the trajectory of AVLAYAH adoption, and every patient journey is unique, from the initial expression of interest through reimbursement approval and ultimately dosing. In addition, because AVLAYAH is weight-based, the number of vials used can vary meaningfully between a newly diagnosed infant and a 16-year-old adolescent. For the first two Qs of launch, we therefore plan to provide guidance on expected net product revenue for the following Q.

Slide 18.

We are extremely pleased with the trajectory of the US launched in our first full commercial quarter. We generated 3.6 million in net product revenue and secured commercial coverage for more than 50% of covered lives.

before discussing the Outlook, I want to briefly address our approach to communicating launch Dynamics and metrics

We understand that visibility is important to our investors, and we are committed to maintaining an open dialogue.

There are many factors that influence the trajectory of AA adoption, and every patient journey is unique—from the initial expression of interest, through reimbursement, approval, and ultimately dosing.

In addition because Ada is weight-based, the number of vials used can vary meaningfully between a newly diagnosed infant. And at 16 year old adolescent,

Katie Peng: We believe that this approach, together with the prior Q's reported net product revenue, will provide the clearest view of the launch trajectory during this early period. Before launch, we described an adoption curve that would build over time. We expected the earliest patients to be highly engaged families who were waiting for AVLAYAH and were prepared to move quickly through the medical acceptance process. That initial demand has been stronger than we anticipated, reflecting both the high awareness of AVLAYAH and the significant unmet need in the Hunter syndrome community. While many patients have already started therapy, others continue to move through the reimbursement and treatment journey. As payer coverage expands and treatment centers gain experience with AVLAYAH, we expect the patient journey from prescription to infusion to become increasingly efficient, enabling more eligible patients to begin treatment.

For the first two quarters of launch, we therefore plan to provide guidance on expected net product revenue for the following quarter. We believe that this approach, together with the prior quarter’s reported net product revenue, will provide the clearest view of the launch trajectory during this early period.

Before launch, we described an adoption curve. That would build over time. We expected the earliest patients to be highly engaged families who are waiting for Ada and were prepared to move quickly through the medical exceptions process.

That initial demand has been stronger than we anticipated reflecting. Both the high awareness of AA and the significant unmet need in the hunter syndrome community.

While many patients have already started therapies, others continue to move through the reimbursement and treatment journey.

As payer coverage expands and treatment centers gain experience with Ada. We expect the patient Journey from prescription to infusion to become increasingly efficient enabling more eligible patients to begin treatment.

Katie Peng: Given the pace of adoption, expanding access, and continued strong execution, we expect Q3 net product revenue to be in the range of $10 to $12 million. Most importantly, families continue to tell us that AVLAYAH and the support they receive from the Denali team is making a meaningful difference in their lives. Slide 19. The AVLAYAH launch also has significance beyond a single product. It establishes the first commercial foundation for our Enzyme Transport Vehicle franchise across lysosomal storage disorders. The ETV platform is designed to reach the whole body, including the brain, and it provides opportunities across Hunter syndrome, Sanfilippo syndrome, FTD Granulin, Pompe disease, Gaucher disease, and Hurler syndrome. The ERT market alone represents more than a $9 billion opportunity.

Given the pace of adoption, expanding access, and continued strong execution, we expect Q3 net product revenue to be in the range of $10 to $12 million.

Most importantly, families continue to tell us that Abla and the support they receive from the Denali team is making a meaningful difference in their lives.

They have Leah, launch. Also has significance Beyond a single product. It establishes the first commercial foundation for our enzyme transport vehicle franchise across lysosomal storage disorders,

Katie Peng: Across these diseases, we expect to benefit from shared scientific expertise, established relationships with treatment centers and advocacy organizations, and commercial capabilities that could be leveraged across future launches. Each patient we support and each treatment center we activate strengthens the infrastructure that can serve the broader ETV franchise. AVLAYAH is therefore both an important medicine for Hunter syndrome community and an early demonstration of our ability to discover, develop, manufacture, and commercialize innovative therapies efficiently and successfully. We are proud of the start while recognizing that this is still the beginning of the launch. Our priorities remain expanding access, supporting a positive treatment experience, reaching additional eligible patients, and preparing for the international expansion. With that, I will turn it back to you, Ryan, to discuss the broader pipeline.

The ETV platform is designed to reach the whole body including the brain, and it provides opportunities across Hunter syndrome, Stan philipo syndrome STD granul pompei's disease, gous disease, and Hurley syndrome. The ERT Market alone represents more than a 9 billion dollar opportunity across these diseases. We expect to benefit from shared, scientific expertise, established relationships with treatment centers, and advocacy organizations, and Commercial capabilities. That could be leveraged across future launches.

Each patient we support and each treatment center we activate strengthens the infrastructure that can serve the broader ETB franchise.

AA is therefore both an important medicine for Hunter syndrome community and an early demonstration of our ability to discover develop manufacture and commercialize Innovative therapies, efficiently and successfully.

We are proud of the start while recognizing that this is still the beginning of the launch. Our priorities remain expanding access, supporting a positive treatment experience, reaching additional eligible, patients, and preparing for the international expansion.

With that, I'll turn it back to you, Ryan, to discuss the broader pipeline.

Ryan Watts: Thanks, Katie. Slide 21. Earlier, I described AVLAYAH as the commercial foundation for Denali and the first proof that the Transport Vehicle platform can enable medicines for patients. I would now like to provide an update on the broader pipeline and then spend most of my time on our Alzheimer's disease program. Our D3X3 strategy remains unchanged: deliver, develop, and discover. Over the 2026 to 2028 period, our goals are to build 2 growing commercial brands, generate 5 clinical proofs of concept, and advance 4 to 6 additional programs into the clinic through continued leadership and invention in blood-brain barrier technologies. Slide 22. Next, I would like to briefly update you on DNL593. DNL593 is a direct progranulin replacement therapy designed to deliver progranulin across the blood-brain barrier and restore the missing protein to key cell types in the brain, including the lysosome, where progranulin normally functions.

Thanks Katie, slide, 21 earlier, I described AA as the commercial foundation for Denali and the first proof that the transport vehicle platform can enable medicines for patients, I would now like to provide an update on the broader Pipeline and then spend most of my time on our Alzheimer's disease program. Our D3 by3 strategy remains unchanged delivered develop and discover over the 2026 to 2028 period. Our goals are to build 2 growing commercial Brands, generate 5 clinical proofs of Concepts and advanced 4 to 6, additional programs into the clinic through continued leadership and invention in blood brain barrier Technologies.

Ryan Watts: Earlier this year, we regained full ownership and control of the program from Takeda. That provides us with greater flexibility over the development strategy and timing of the data analysis. We have decided to allow for a longer period of observation in the open label extension portion of the ongoing phase I/II study. We now expect data in H1 2027, updated from our prior expectation results by the end of the year. The additional follow-up will allow us to better characterize treatment effects across multiple biomarkers, including neurofilament light chain, or NfL, which may change gradually following treatment. Pending the totality of the data, we also plan to explore whether a biomarker-driven accelerated approval path may be appropriate. NfL has regulatory precedent in the related neurodegenerative disease ALS, although any potential path for DNL593 would require discussion and alignment with regulators.

Slide 22. Next, I would like to briefly update you on DNL593. As you know, 593 is a direct progranulin replacement therapy designed to deliver progranulin across the blood-brain barrier and restore the missing protein to key cell types in the brain, including the lysosome, where progranulin normally functions. Earlier this year, we regained full ownership and control of the program from Takeda. That provides us with greater flexibility over the development strategy and timing of the data analysis. We have decided to allow for a longer period of observation in the open-label extension portion of the ongoing Phase 1/2 study. We now expect data in the first half of 2027, updated from our prior expectation of results.

by the end of the year.

The additional follow-up will allow us to better characterize treatment effects across multiple biomarkers, including neurofilament light chain or NFL, which may change gradually following treatment.

Ryan Watts: We are excited about DNL593 because it directly addresses the genetic cause of FTD-GRN by replacing progranulin. This week, the FDA granted orphan drug designation to DNL593 for FTD-GRN, underscoring the significant unmet need facing individuals affected by this disease and the potentially promising rationale of our approach with PTV:PGRN. Earlier, healthy volunteer data demonstrated dose-dependent increases in CSF progranulin following intravenous administration, providing evidence of brain delivery and further validation of the Transport Vehicle platform. Slide 23. I will now turn to what we believe is one of the most exciting areas of our pipeline, Alzheimer's disease. A few weeks ago, I had the privilege of delivering a plenary presentation at the Alzheimer's Association International Conference in London.

Pending the totality of the data. We also plan to explore whether a biomarker driven, accelerated, approval path. May be appropriate, NFL has regulatory precedent in the related neurodegenerative disease. Also, any potential path for DNL. 593 would require discussion and alignment with Regulators. We are excited about DNL 593 because it directly addresses the genetic cause of FTD granular by replacing programul this week, the FDA granted orphan drug designation to DNL 593 for FTD granul underscoring, the significant unmet needs. They can individuals affected by this disease and the potentially promising rationale about our approach with PTV program granular.

Earlier, healthy volunteer data demonstrated dose-dependent increases in cerebral spinal fluid progranulin following intravenous administration, providing evidence of brain delivery and further validation of the transport vehicle platform.

Ryan Watts: After working in Alzheimer's disease for more than 20 years, I believe the field has entered a transformative period because of extraordinary progress in three historically challenging areas: biology, biomarkers, and the blood-brain barrier. Human genetics and pharmacology are sharpening our understanding of the multifaceted biology of disease. Imaging and blood-based biomarkers are enabling earlier diagnosis and increasingly precise measurements of disease progression and treatment response. Brain transport technologies are creating the potential to deliver biologic medicine broadly throughout the brain. Together, these advances create new opportunities for the next generation of Alzheimer's therapies. Slide 24. We believe the next advances in Alzheimer's disease may depend on delivering therapies more effectively throughout the brain. Amyloid plaque clearance is now clinically validated, but currently available antibodies are limited by modest efficacy and the risk of amyloid-related imaging abnormalities, or ARIA.

Slide 23. I will now turn to what we believe is one of the most exciting areas of our pipeline: Alzheimer's disease. A few weeks ago, I had the privilege of delivering a plenary presentation at the Alzheimer's Association International Conference in London. After working in Alzheimer's disease for more than 20 years, I believe the field has entered a transformative period because...

Therapies.

Slide 24.

Ryan Watts: Tau reduction has also shown encouraging clinical signals, but current antisense approaches rely on intrathecal administration and may not achieve uniform distribution throughout the brain and have other limitations. Our two clinical programs are designed to address these limitations through better brain delivery. DNL921 is a potential best-in-class BBB-crossing anti-amyloid antibody designed to improve plaque engagement while reducing ARIA potential and peripheral immune activation. DNL628 is a potential first-in-class BBB-crossing antisense oligonucleotide designed for intravenous administration and broad uniform distribution throughout the capillary network. Slide 25. Starting with DNL921, one of the important features of Transport Vehicle-enabled delivery is the route of entry into the brain. When conventional anti-amyloid antibodies enter the brain, they concentrate around larger arteries and arterioles where vascular amyloid is present. We believe that localization contributes to ARIA risk.

We believe the next advances in Alzheimer's disease, may depend on delivering therapies more effectively throughout the brain Amoy plaque clearance is now clinically validated. But currently available, antibodies are limited by Modest efficacy and the risk of Amal related Imaging abnormalities or Arya

How reduction has also shown encouraging clinical signals. But current anti-sense approaches rely on intrathecal Administration and may not achieve uniform distribution throughout the brain and have other limitations.

Our 2 clinical programs are designed to address these limitations through better. Brain delivery DNL. 921 is a potential best-in-class BBB Crossing anti- amloid antibodies. Designed to improve plaque engagement while reducing the area of potential and peripheral immune activation DNL 628 is a potential first in-class PBB Crossing toe. Anti-sense oligonucleotide designed for intravenous administration, and Broad uniform distribution throughout the capillary Network.

Ryan Watts: By engaging the transferrin receptor, Antibody Transport Vehicle-enabled antibodies enter the brain through the extensive capillary network and distribute more evenly throughout the brain. In preclinical models, this route of entry was associated with substantially fewer MRI lesions than a conventional anti-amyloid antibody, including at dose levels that achieved strong target engagement. These data support our hypothesis that improved brain delivery and biodistribution may enhance plaque engagement while reducing ARIA potential. Slide 26. We've also engineered DNL921 to address the broader attributes required for a successful medicine. Unlike fusion approaches that append a transferrin receptor binding arm to an antibody, our Transport Vehicle binding is embedded directly into the Fc. DNL921 is designed to achieve robust brain concentrations while remaining intact and minimizing effects on immature reticulocytes.

Slide, 25, starting with DNL, 921 1 of the important features of Transport vehicle enabled. Delivery is the route of entry into the brain when conventional anti-mode antibodies. Enter the brain, they concentrate around larger arteries and arterioles where vascular Amal is present. We believe that localization contributes to Arya risk.

By engaging the transferrin receptor antibody, transfer vehicle-enabled antibodies enter the brain through the extensive capillary network and distribute more evenly throughout the brain. In preclinical models, this route of entry was associated with substantially fewer MRI lesions than a conventional anti-amyloid antibody, including at dose levels that achieved strong target engagement. These data support our hypothesis that improved brain delivery and biodistribution may enhance plaque engagement while reducing ARIA potential.

Ryan Watts: With the goal of preserving activity at amyloid plaques while reducing peripheral immune activation, DNL921 incorporates conditional effector function through our cis law design. Slide 29. Turning to DNL628, the central opportunity is to improve both distribution and convenience for antisense therapy. Intrathecally administered antisense oligonucleotides distribute from cerebral spinal fluid and can produce uneven exposure across brain regions with greater treatment burden for patients. By contrast, intravenous Oligonucleotide Transport Vehicle OTV delivery uses a capillary network to distribute the antisense oligo broadly across the brain and spinal cord. This distribution includes key cell types involved in neurodegeneration, including neurons, astrocytes, and microglia. Slide 28. In mice expressing human tau and the human transferrin receptor, DNL628 produced robust reductions in MAPT RNA and tau protein. Importantly, tau protein reduction persisted for more than 12 weeks after dosing, supporting the potential for a practical dosing interval.

Slide 26. We've also engineered DNA 921 to address the broader attributes required for a successful medicine. Unlike Fusion, approaches that append. A transfer receptor binding arm to an antibody. Our transport vehicle binding is embedded directly into the FC. DL, 921 is designed to achieve robust brain concentrations. While remaining intact and minimizing effects on immature reticular sites.

With the goal of preserving activity at Amoy Platt while reducing peripheral immune activation, DNL921 incorporates conditional effects or function through our cisLAW design.

By 29 turning to DNL 628, the central opportunity is to improve both distribution and convenience for antisense therapy. Intrathecally administered antisense oligonucleotides distribute from cerebrospinal fluid and can produce uneven exposure across brain regions, with greater treatment burden for patients. By contrast, intervening with oligonucleotide trans...

Vehicle OTV delivery uses a capillary Network to distribute the antisense oligo, broadly across the brain and spinal cord. This distribution includes key cell types involved in neurodegeneration including neurons astrocytes and microglia

slide 28 in my expression, human pal, and the human trans therm receptor DNL 628 produce robust reduction in map, prna and Tau protein, importantly, Tau protein reduction persisted for more than 12 weeks after dosing supporting the potential for a practical dosing interval,

Ryan Watts: These data support the design of the ongoing phase I-B study, where we are evaluating safety, dose selection, effects on tau levels, and imaging measures in people with biomarker-confirmed early Alzheimer's disease. Slide 29. Both Alzheimer's disease programs are now in clinical development. DNL628 phase I-B study is ongoing, and we expect initial clinical biomarker data in H1 2027. DNL921, the clinical trial application was submitted in H1 this year, and we expect initial safety and clinical proof of concept data in 2027. These readouts will be important not only for individual programs, but also for the broader validation of our Oligonucleotide Transport Vehicle and Antibody Transport Vehicle platforms in common neurodegenerative disease.

These data support the design of the ongoing Phase 1 Beast study where we are evaluating safety dose selection effects on toe levels and imaging measures in people with biomarker confirmed early Alzheimer's disease.

By 29, both Alzheimer's disease. Programs are now in clinical development. The email 628 phase 1B study is ongoing and we expect initial clinical biomarker data in the first half of 2027, you know, 921 the clinical trial application was submitted in the first half of this year and we expect initial safety and clinical proof of concept data in 2027.

Ryan Watts: Taken together, our progress this quarter demonstrates the breadth of Denali, a growing commercial business, broad clinical pipeline, and a repeatable platform capable of supporting multiple therapeutic modalities, all focused on delivering meaningful medicines to patients and families. Slide 30. With that, I will turn the call over to Alex to review our financial results.

These readouts will be important, not only for individual programs, but also for the broader validation of our eygon nucleotide and antibody transport vehicle Platforms in common neurodegenerative disease taken together. Our progress, this quarter demonstrates, the breadth of Denali a growing Commercial Business, broad clinical Pipeline, and a repeat.

Able platform capable of supporting multiple therapeutic modalities, all focused on delivering meaningful medicines to patients and families.

Slide 30 with that. I will turn the call over to Alex to review our financial results.

Alexander Schuth: Thank you, Ryan. Slide 31. I will close our prepared remarks today with a look at our portfolio, capital allocation priorities, and Q2 financial results. We have built a broad portfolio based on the Transport Vehicle platform, which is now clinically and commercially validated through AVLAYAH. The portfolio has the potential to create significant value in the near and long term, with each program designed to offer first or best-in-class potential in its respective indication, and we are well-capitalized to execute against it. Our portfolio has two key components. First, we have a pipeline of next-generation enzyme and protein replacement therapies designed to treat the whole body, including the brain. Across these programs, we can apply the clinical and regulatory learnings from AVLAYAH and leverage our existing capabilities in development, manufacturing, and commercialization.

Alex Schuth: Thank you, Ryan. Slide 31. I will close our prepared remarks today with a look at our portfolio, capital allocation priorities, and Q2 financial results. We have built a broad portfolio based on the Transport Vehicle platform, which is now clinically and commercially validated through AVLAYAH. The portfolio has the potential to create significant value in the near and long term, with each program designed to offer first or best-in-class potential in its respective indication, and we are well-capitalized to execute against it. Our portfolio has two key components. First, we have a pipeline of next-generation enzyme and protein replacement therapies designed to treat the whole body, including the brain. Across these programs, we can apply the clinical and regulatory learnings from AVLAYAH and leverage our existing capabilities in development, manufacturing, and commercialization.

Thank you. Ryan, slide 31. I will close our prepared remarks today with a look at our portfolio, capital allocation priorities, and second quarter financial results.

Through a layer.

The portfolio has the potential to create significant value in the near and long-term with each program designed to offer first or best-in-class potential in its respective indication and we are well, capitalized to execute against it.

Alexander Schuth: We estimate that each program represents a potential market opportunity ranging from approximately $500 million to more than $1 billion, creating a multibillion-dollar opportunity across the franchise. These programs benefit from a well-established therapeutic modality, measurable biomarkers, and in certain diseases, the potential for biomarker-based accelerated development paths. In addition, and shown on the right, is our portfolio targeting common neurodegenerative diseases. This includes two clinical-stage blood-brain barrier-enabled molecules targeting tau and amyloid beta for Alzheimer's disease with first and/or best-in-class potential. If successful, these programs could reach millions of patients and represent substantial multibillion-dollar market opportunities. Slide 32. Turning to the financials and capital allocation. We ended Q2 with approximately $940 million in cash equivalents, and marketable securities. In July, we received $195 million in proceeds from the sale of the rare pediatric disease priority review voucher awarded following the approval of AVLAYAH.

Alex Schuth: We estimate that each program represents a potential market opportunity ranging from approximately $500 million to more than $1 billion, creating a multibillion-dollar opportunity across the franchise. These programs benefit from a well-established therapeutic modality, measurable biomarkers, and in certain diseases, the potential for biomarker-based accelerated development paths. In addition, and shown on the right, is our portfolio targeting common neurodegenerative diseases. This includes two clinical-stage blood-brain barrier-enabled molecules targeting tau and amyloid beta for Alzheimer's disease with first and/or best-in-class potential. If successful, these programs could reach millions of patients and represent substantial multibillion-dollar market opportunities. Slide 32. Turning to the financials and capital allocation. We ended Q2 with approximately $940 million in cash equivalents, and marketable securities. In July, we received $195 million in proceeds from the sale of the rare pediatric disease priority review voucher awarded following the approval of AVLAYAH.

Our portfolio has 2 key components. First, we have a pipeline of Next Generation enzyme and protein replacement, therapies designed to treat the whole body, including the brain across these programs, we can apply the clinical and Regulatory learning from AA and leverage. Our existing capabilities in development manufacturing and commercialization

We estimate that each program represents a potential market opportunity, ranging from approximately $500 million to more than $1 billion, creating a multi-billion dollar opportunity across the franchise.

These programs benefit from a well-established therapeutic modality measurable biomarkers and uncertain diseases, the potential for biomarker based accelerated development paths.

In addition and shown on the right is our portfolio targeting common already generated diseases. This includes 2 clinical stage, blood brain barrier enabled, molecules targeting toe and ammo beta for Alzheimer's disease with first and or best-in-class potential. If successful, these programs could reach millions of patients and represent substantial multi-billion dollar market opportunities,

Slide 32.

Turning to the financials and capital allocation.

We ended the second quarter with approximately $940 million in cash, cash equivalents, and marketable securities.

Alexander Schuth: Together, this brings our pro forma cash equivalents, and marketable security to more than $1.1 billion. This gives us flexibility to pursue three priorities with discipline. First, it allows us to invest in the execution of our portfolio, including the commercial activities for AVLAYAH, as outlined by Katie. Preparations for the potential launch of DNL126, or tividenofusp alfa in 2027, and advancement of clinical programs. Second, we can continue to build capabilities and infrastructure for efficiency. In particular, our internal manufacturing facility in Salt Lake City provides opportunities for speed in development and attractive COGS as we bring additional products forward. Third, our balance sheet provides strategic flexibility with respect to potential future partnerships and diversified sources of capital. Slide 33. The complete details of our financial results are included in today's press release in Form 10-Q, I will focus only on the key items.

Alex Schuth: Together, this brings our pro forma cash equivalents, and marketable security to more than $1.1 billion. This gives us flexibility to pursue three priorities with discipline. First, it allows us to invest in the execution of our portfolio, including the commercial activities for AVLAYAH, as outlined by Katie. Preparations for the potential launch of DNL126, or tividenofusp alfa in 2027, and advancement of clinical programs. Second, we can continue to build capabilities and infrastructure for efficiency. In particular, our internal manufacturing facility in Salt Lake City provides opportunities for speed in development and attractive COGS as we bring additional products forward. Third, our balance sheet provides strategic flexibility with respect to potential future partnerships and diversified sources of capital. Slide 33. The complete details of our financial results are included in today's press release in Form 10-Q, I will focus only on the key items.

In July, we received $195 million in proceeds from the sale of the rare pediatric disease priority review voucher awarded following the approval of AA.

Together, this brings our performer, cash, cash equivalents, and marketable securities to more than $1.1 billion.

This gives us flexibility to pursue 3 priorities with discipline first. It allows us to invest in the execution of our portfolio. Including the commercial activities for Ava as outlined by Katie preparations for the potential launch of DNL 126 or sophina fast Alpha in 2027 and advancement of clinical programs.

Second, we can continue to build capabilities and infrastructure for efficiency in particular, our internal manufacturing facility and Salt Lake City provides opportunities for Speed and development and attractive cogs as we bring additional products forward.

Third, our balance sheet provides strategic flexibility with respect to potential future Partnerships and diversified sources of capital.

Alexander Schuth: AVLAYAH generated $3.6 million in net product revenues during the first full quarter of commercial availability. Research and development expenses were $97 million, compared with $102.7 million for the same period in 2025. The decrease primarily reflected the timing of AVLAYAH commercial supply manufacturing in the prior year period and lower external spending on small molecule programs. Selling, general, and administrative expenses were $36.3 million, compared to $32.3 million in Q2 2025. The increase primarily reflected investments to support the AVLAYAH commercial launch. As noted, we ended the quarter with approximately $940 million in cash equivalents, and marketable securities, before receipt of the $195 million in PRV proceeds in July.

Alex Schuth: AVLAYAH generated $3.6 million in net product revenues during the first full quarter of commercial availability. Research and development expenses were $97 million, compared with $102.7 million for the same period in 2025. The decrease primarily reflected the timing of AVLAYAH commercial supply manufacturing in the prior year period and lower external spending on small molecule programs. Selling, general, and administrative expenses were $36.3 million, compared to $32.3 million in Q2 2025. The increase primarily reflected investments to support the AVLAYAH commercial launch. As noted, we ended the quarter with approximately $940 million in cash equivalents, and marketable securities, before receipt of the $195 million in PRV proceeds in July.

Slide 33, the complete details of our financial results are included in. Today's press release, informed 10 Q. So I will focus only on the key items.

As layer generated 3.6 million in net product revenues. During the First full quarter of commercial availability research and development. Expenses were 97 million compared with 102.7 million for the same period in 2025.

The decrease primarily reflected the timing of ADA commercial supply manufacturing in the prior-year period and lower external spending on small molecule programs.

Selling General and administrative expenses were 36.3 million compared to 32.3 million. In the second quarter, 2025 the increase primarily reflected Investments to support the Ada commercial launch.

As noted, we ended the quarter with approximately $940 million in cash, cash equivalents, and marketable securities before we received the $195 million in PRV proceeds in July.

Alexander Schuth: In closing, we believe Denali is entering this exciting next phase from a position of strength, with a commercial product, a broad pipeline, a validated platform, and the capabilities and capital to deliver value for patients and investors. With that, I will turn the call back to the operator to begin the Q&A session. Thank you.

Alex Schuth: In closing, we believe Denali is entering this exciting next phase from a position of strength, with a commercial product, a broad pipeline, a validated platform, and the capabilities and capital to deliver value for patients and investors. With that, I will turn the call back to the operator to begin the Q&A session. Thank you.

In closing, We Believe Denali is entering this exciting next phase from a position of strength with a commercial product, a broad pipeline, a validated platform and the capabilities and capital to deliver value for patients. And investors

With that, I will turn the call back to the operator to begin the Q&A session. Thank you.

Operator: Thank you. We will now begin the question and answer session. If you wish to ask a question, you will need to press star one one on your telephone and wait for your name to be announced. To withdraw your question, please press star one one again. We will take our first question. The question comes from the line of Jessica Fai from JPMorgan. Please go ahead. Your line is open.

Operator: Thank you. We will now begin the question-and-answer session. If you wish to ask a question, you will need to press star one one on your telephone and wait for your name to be announced. To withdraw your question, please press star one one again. We will take our first question. The question comes from the line of Jessica Fai from JPMorgan. Please go ahead. Your line is open.

Thank you. We will now begin the question and answer session. If you wish to ask a question, you will need to press star 1 1 on your telephone and wait for your name to be announced to withdraw your question. Please. Press star 1 1 again.

We will take our first question and the question comes from the line of Jessica fee from JP Morgan. Please go ahead, your line is open

[Analyst] (JPMorgan): Hello, this is Adam on for Jess. Thanks for taking our question. I just was curious, what in the launch so far has helped you come up with the next quarter's guidance? Can we assume that growth trajectory to continue through the end of the year? Could we see maybe OpEx guidance in the future? Thank you.

Uh maybe Opex guidance in the future. Thank you.

Katie Peng: Thanks, Adam. Thanks for your question. What's giving us confidence is all of the leading indicators are moving in a very positive direction. As you saw from the presentation, physician awareness is extremely high of the AVLAYAH data. They're highly motivated to switch patients. In addition, we've seen tremendous engagement from families as well. We've also had great success moving patients through reimbursement with the medical exceptions process. As you can see, also, we've had success with payer access. We have now greater than 50% of commercial lives covered as of the end of Q2. Given all the dynamics are moving in the right direction, we feel very confident that the momentum will continue.

Alexander Schuth: I can take the second part. This is Alex. I can take the second part on OpEx. Capital efficiency is very important to us. We are pleased that we're able to keep OpEx flat in Q2 of 2026 or sorry, Q2 of 2025. Actually slightly lower on a six-month basis, while at the same time preparing for the launch and advancing important new programs into the clinic. With respect to an outlook, we generally provide an outlook for the full year at the beginning of the year. Please stay tuned for that.

Alex Schuth: I can take the second part. This is Alex. I can take the second part on OpEx. Capital efficiency is very important to us. We are pleased that we're able to keep OpEx flat in Q2 of 2026 or sorry, Q2 of 2025. Actually slightly lower on a six-month basis, while at the same time preparing for the launch and advancing important new programs into the clinic. With respect to an outlook, we generally provide an outlook for the full year at the beginning of the year. Please stay tuned for that.

Thanks Adam. Uh, thanks for your question. So, what's giving us confidence is all of the leading indicators are moving in a very positive direction as you saw from the, from the presentation, uh, physician awareness. It's extremely high of the AA data and they're highly motivated. Um, to switch patients in addition, we've seen tremendous engagement from families as well. And we've also had great success moving patients, uh, through reimbursement. Uh, with the medical exceptions process. And as you can see, also, we've had success with pear access and we have now greater than 50% of uh commercial lives covered at as of the end of Q2. So given all the Dynamics are moving in the right direction, we feel very confident that uh the momentum will continue.

I can take the second part is Alex. I can take the second part on Opex. So, um, Capital efficiency is very important to us and we are pleased that we're able to keep Opex flat in Q2 of 26 versus Q2 of 25 and actually slightly lower on a 6-month basis while at the same time, preparing for the launch and advancing important new programs into the clinic um, with respect to an Outlook, we generally provide an outlook for the full year at the beginning of the year. So please stay tuned for that.

[Analyst] (JPMorgan): Thank you.

Thank you.

Operator: Thank you. We will take our next question, and the question comes from Salveen Richter from Goldman Sachs. Please go ahead. Your line is open.

Thank you.

We will take our next question.

And the question comes from saline richler. From Goldman Sachs. Please go ahead. Your line is open.

[Analyst] (Goldman Sachs): Good afternoon. This is Lydia on for Salveen. Congrats on the progress and on your first earnings call. Could you just speak to the patient profile of the initial patients on therapy and kind of the breakdown between the newly diagnosed versus switched patients? Thanks so much.

Katie Peng: Great. Thanks for that question, Lydia. As you know, with this patient population, majority of the patients are already treated on idursulfase. We expect 90% of prevalent patients would be then switching. The majority of that. Of course, we are seeing as well newly diagnosed patients being put on AVLAYAH, the majority will come from patients that are switching. In terms of patient profiles, we initially believe that patients may skew to the younger population because those are the families that were most engaged and have been following the development of AVLAYAH. We've been really pleased to see that what we can gather today is that it's very broad. In fact, patients across the different age groups within the pediatric population have demonstrated interest in being prescribed AVLAYAH.

Good afternoon. This is Lydia on for Saline, congrats on the progress and on your first earnings call. Um could you just speak to the patient profile of the initial patients on therapy and kind of a breakdown between the newly diagnosed versus switch patience. Thanks so much.

Great, thanks. Thanks for that question, Lydia. So as you know, um with this patient population majority of the patients are already treated uh on either side so we we we expect 90% of patients. Prevalent patients would be then switching. So the majority of that um of course we are seeing as well. Newly diagnosed patients being put on AA but the majority will come from patients that are switching in terms of patient profiles. We initially believed that, um, patients based you to the younger population because those are the families that were most engaged and have been following the development of AAA. But we've been really pleased to see that what we can. Um we can what we can gather today is that it's very Broad. In fact patients across the different age groups within the Pediatric population have demonstrated

Interest in in being prescribed at Leia.

[Analyst] (Goldman Sachs): Thanks so much.

Thanks so much.

Operator: Thank you. We will take our next question, the question comes from Andrew Tsai from Jefferies. Please go ahead. Your line is open.

Thank you.

We will take our next question.

And the question comes from Andrew Tsai from Jefferies. Please go ahead, your line is open.

Andrew Tsai: Hey, good afternoon. Thanks for sharing all these positive updates. Maybe one more on Hunter. You're guiding to a strong sales number for Q3. I think in your prepared remarks, the original guidance for an S-shaped curve still seems to hold. To me, that would mean that come next year, could we be talking about a quarterly revenue number that's significantly larger than $10 million? Is that the right way to think about it? Secondly, Biogen just shared their phase II tau data set. I'd be curious to gauge your thoughts on the degree of efficacy they're seeing. How much do you think that is attributed to too much tau lowering, or is it the mode of administration or something else? It'd be nice to gauge your views on these possibilities or variables around efficacy. Thank you.

Katie Peng: Thanks, Andrew. I'll start with the first part of your question. Yes, we still believe that this year is a foundational year. We talked about getting as many patients on therapy as possible. We are definitely at the beginning stages of that S-curve. But of course, our goal is to tighten that S-shape curve and bring in the inflection point as soon as possible. That's why our focus on driving awareness, making sure the experience on AVLAYAH is very positive so that the community can further share that and drive the momentum. That will drive, as well as with payer access, that will drive that inflection point.

Hey, good afternoon. Thanks for sharing all these positive updates, so, um, maybe 1 more on Hunter, uh, you know, uh, your guiding to a strong sales number for Q3. And then I think in the prepare remarks or original guidance for an s shaped curve, still seems to hold. So, you know, to me that would mean that come next year, you know, we could we be talking about a quarterly Revenue, number that significantly larger than 10 million. Is that the right way to think about it? And then secondly on, uh, Biogen just shared their Phase 2, Tau data sets. So I'd be curious to gauge your thoughts on the the degree of efficacy. They're seeing how much do you think that is attributed to Too Much tailoring? Or is it the motive and administration or something else? Uh, it'd be nice to gauge your views on these possibilities or variables around advocacy. Thank you.

Thanks, Andrew. I'll start with your, the first part of your question. Um, and yes. We we, um, still believe that this year is a foundational year. We talked about getting as many patients on therapy as possible, um, and, and we are definitely at the beginning stages of that s-curve. But, of course, our goal is to tighten that s-shaped curve and bring in the inflection.

Ryan Watts: I'm happy to take the second question, Andrew. As you know, we spoke before the data was shared at AAIC in London, then, of course, a lot came out after the data presentation. I think our response is that, in general, it's the first data set to show that tau lowering may lead to a clinical benefit. I think what's probably the most compelling is you look across not just ADAS-Cog, or sorry, CDR Sum of Boxes, but also ADAS-Cog and MMSE, and you're seeing consistency in potential clinical benefit. I think the challenge, as you have highlighted, is a question around was there not a dose response? Why did the higher doses not lead to more efficacy? I think just a couple points without going into too much detail. Obviously, there were more discontinuations and adverse events in the higher doses.

Point as soon as possible. And that's why our focus on, you know, driving awareness. Making sure the experience on Ava is very positive so that the community can further share that and drive the momentum that will drive as well as with payer access that will drive that inflection point. I'm happy to take the second question. Uh, Andrew, as you know, we we spoke before

The data presentation. And I think,

Ryan Watts: I think it's well understood with intrathecal administration that this is not uncommonly seen, including transient confusion. I think we, like others, look forward to seeing more details and the differences between the doses and that may this actually be masking some of the efficacy. In general, first data set showing tau lowering and potential clinical benefit.

You know, our our response is that um, in general, it's the first data set to show that Tower low towering uh, may lead to a clinical benefit and I think what's probably the most compelling is you look across, not just 8s Cog or sorry CDR, some of boxes. But also 8s Cog and mmsc and you're seeing consistency in, uh, potential clinical benefit. I think the challenge is you, as you, um, have highlighted is a question around. Why do was there not a dose response? Why did the higher dose is not lead to more efficacy? And I think just a couple points without going into too much detail, you know, obviously there were more discontinuation uh, and Adverse Events in the higher doses. I think it's well understood with interest equal Administration. That this is not uncommonly seen including uh, you know, transient confusion. So I think we like others look forward to seeing more details in the differences between the doses. And that may this actually be masking, you know, some of the efficacy.

but in general, you know, first data set, set showing how lowering and and potential uh clinical benefits

Andrew Tsai: Thank you.

Thank you.

Operator: Thank you. We will take our next question, the question comes from Tazeen Ahmad from Bank of America. Please go ahead. Your line is open.

Thank you, we will take our next question and the question comes from tazeen. Ahmed from Bank of America, please go ahead. Your line is open.

Tazeen Ahmad: Hi, guys. Thanks so much for taking my questions. I wanted to just focus on DNL593 for a second. I'm sorry if I missed this in your prepared remarks, but can you share any color on what level of data you plan to share when you release it? What, in your view, would be good data? Can you just clarify why you want to wait for NfL data? I think in the past you mentioned the focus was going to be on lysosomal function. Thanks.

Ryan Watts: Yeah, thanks, Tazeen. I'm happy to take that. I think the most important point here is that as we've regained full rights to this program, we're now in a position where we can essentially drive the strategy on this program. I think in our experience, I think point number one is that longer-term data is often needed when looking at biomarkers like NfL. I think what's unique about FTD-GRN from, let's say, some of our other lysosomal storage disease programs, that this is a haploinsufficiency in terms of the underlying disease. As a result, as we look at some of the lysosomal biomarkers historically, there's elevation, but it's modest, not like what you see with heparan sulfate in Hunter syndrome. So what we've decided to do is we're trying to find an accelerated path.

Hi guys, thanks so much for taking my questions. Um, I wanted to just focus on 593 for a second. Um I'm sorry if I missed this and your prepared remarks, but can you share any, um, color on what level of data you plan to share? Uh, when you release it and what in your view would be good data and then can you just clarify, um, why you want to wait for NFL data? I think in the past you mentioned the focus was going to be on lysosomal function. Thanks.

Yeah. Thanks Dina. I'm happy to take that. I think, I think the most important Point here is that, you know, as we've regained, uh, full rights to this program, we're now in a position where we can potentially Drive the strategy on this program. And and I think in our experience, I think Point number 1, uh, is that longer term data is often needed when looking at biomarkers like NFL? Uh, and I think what unique about, uh, FTD granular from let's say some of our other losal stores disease programs, is that this is a haplo. It's a insufficiency in terms of the, uh, underlying disease. And as a result, you know, as we look at some of the lives of some of our markers, historically, you know, there's elevation, but it's modest, not not like what you see with Heparin sulfate in Hunter syndrome. And so what we've decided to do is

Ryan Watts: As you may have also noted, we received orphan drug designation for this program just recently as well. So we think we have the best chance of seeing robust data specifically on the distal biomarkers such as NfL and more broadly, and just looking at the entire biomarker set, including lysosomal biomarkers as well. I think the key here is just giving this program the best chance of a potential accelerated path. Obviously, with data in hand, we'd have to address that with regulators.

We're we're trying to find an accelerated path, uh, as you may have also noted. Um, you know, we received orphan disease, designation for this program, just recently as well. And so we think we have the best chance of seeing you know robust data specifically on the distal biomarkers such as NFL and more broadly and just looking at the entire uh biomarker um, set including lysosomal biomarkers as well. So I think that the key here is just giving this this program the best chance of of an of a potential accelerated path, obviously, with data in hand and we'd have to address that with regulators.

Operator: Thank you. We will take our next question, and the question comes from Michael Yee from UBS. Please go ahead. Your line is open.

Thank you.

We will take our next question. And the question comes from Michael Yee from UBS. Please go ahead. Your line is open.

[Analyst] (UBS): Hi, this is Madeline on from Michael. I just wanted to ask you a couple more on the launch. Congratulations on such a strong number right out of the gate. Just wondering, given your comments around stronger than expected early demand and the fact that we sort of know the number of Hunter patients that are out there, do you expect a sort of bolus effect in the US of these patients who are covered on the label now coming on? Then for those patients that are having to go through sort of medical exceptions and prior auth, do you have any sense of what the time is from getting a script to actually getting infused? Thank you.

Hi, this is Don on from Michael. Um, I just wanted to ask you a couple more on that. Long congratulations on such a strong, um, number right out of the gate. Um, just wondering—

Given your your comments around stronger than expected early demand. And the fact that we sort of know the number of Education that are out there. Could we expect to sort of go as effects in in the US of of these patients who are covered on the label now coming on. Uh, and then for these patients, that are having to go through sort of medical exceptions and prior off. Do you have any sense of what the time is? Um, like getting a script to get an interview.

Katie Peng: Thank you. Thank you for that question. In terms of what we expected, we definitely expected that pool of patients who've been following AVLAYAH's development very closely. That pool of highly interested families is bigger than we initially had expected. We are working through with the early experience with these early families, though we are seeing expansion into the broader patient population, as I described earlier. We're very excited about the fact that it's going beyond just those early families, we're going to expect to see continued growth into the broader population. As you stated, the total eligible population is around 375 that are considered pediatric patients in the US. In terms of, I think your question was starting the interest to infusion and what's the timeline for that.

Thank you.

Thank you. Thank you for that question. So, in terms of what we expected, we definitely expected that pool of patients, um, who've been following La La's development, very closely, um, and that pool of highly interested families, um, is bigger than we initially had expected. Um,

The total eligible population is around 375 um, that are considered pediatric patients in the US.

Katie Peng: As you know, with this early in launch and without payer coverage initially, although of course that's expanding now, there is huge variability in the time between patients expressing interest to when they actually get infused. It's really hard to comment on that this early in launch. However, with payer coverage improving over time, that timeline should get more straightforward, more efficient.

Um, in terms of I think your question was starting uh the interest to infusion and what's the timeline for that?

As you know, with or this early in launch and without uh, payer coverage, initially of those, of course, that's expanding now, there's huge variability in the time between uh, patients expressing interest to when they actually get infused. So it's really hard to comment on that this early uh in in in launch however you know with payer coverage improving over time that timeline should get um, more more straightforward, more efficient.

Ryan Watts: Okay.

Operator: Thank you. We will take our next question, the question comes from Sean Lahman from Morgan Stanley. Please go ahead. Your line is open.

Thank you.

We will take our next question.

And the question comes from Sean Leman from Morgan Stanley. Please go ahead, your line is open.

[Analyst] (Morgan Stanley): Hi, this is Mike Riad on for Sean. Thank you for taking our questions and congratulations on the strong start. Can you remind us how is progress going on for the adult confirmatory study? Given what you've learned so far, acknowledging it's only one quarter into the launch, is there anything that has changed your excitement or views as to how that adult study could influence launch trajectory or pricing?

Mike Riad: Hi, this is Mike Riad on for Sean. Thank you for taking our questions and congratulations on the strong start. Can you remind us how is progress going on for the adult confirmatory study? Given what you've learned so far, acknowledging it's only one quarter into the launch, is there anything that has changed your excitement or views as to how that adult study could influence launch trajectory or pricing?

Hi. This is Mike Reid on for Sean. Thank you for taking our questions and congratulations on the uh, the strong start. Um, can you remind us how is progress going on for the adult confirmatory study and given what you've learned so far? I acknowledging, it's only 1 quarter into the launch. Um, is there anything that has changed your excitement or views as to? What how that adult study could influence launch trajectory or pricing?

Katie Peng: What we're hearing today, certainly there are adult patients that are very much interested in getting treated with AVLAYAH. I think that's your question. I don't think launch price will change since we've already gone into market, even when we hopefully will get the label expansion. I'll let Peter comment on the study.

So what we have what we're hearing today. Um certainly there are adult patients that are very much interested, um, in getting treated with Ava, um,

Peter Chin: In terms of the COMPASS Phase II/III study, we're excited about reading out the study, which is set to end at the end of next year. It is going to be the basis for expanding the label both in the US as a confirmatory study and for potential global launches.

I think that's that your question. I don't think launch price will change since we've already, um, gone into Market. Even when we, uh, hopefully will get the label expansion and I'll let Peter comment on the study. Yeah. And in terms of the compass Phase 23 study where, where excited about reading out the study uh, which is set to end at the end of next year. Um, it is going to be the basis for uh expanding the label both in the US as a confirmatory study and and for our Global potential Global launches,

[Analyst] (Morgan Stanley): Thank you. That's very helpful. Just thinking about the Q2 to Q3 revenue guidance and ramp, can you walk us through any key drivers of that acceleration? How much of it is coming from new patient starts versus patients converting to reimbursement?

Mike Riad: Thank you. That's very helpful. Just thinking about the Q2 to Q3 revenue guidance and ramp, can you walk us through any key drivers of that acceleration? How much of it is coming from new patient starts versus patients converting to reimbursement?

Thank you, that's very helpful. Um, and then just thinking about the 2q to 3Q Revenue, guidance and RAM. Can you walk us through on your key drivers of that acceleration. How much it is, how it is. Coming from new patients. Starts versus patients converting to reimbursement.

Katie Peng: I think it's a combination of all those factors. We're seeing, as I stated earlier, all of the leading indicators, the high level of engagement from physicians and families, the conviction the physicians have in going for medical exceptions process, the fact that our payer coverage is getting better every day. I think all of those things are going to be contributing to the growth over the next quarter.

So, I think it's a combination of...

all those factors.

So we're seeing as I stated earlier all of the leading indicators, um, the high level of Engagement from Physicians and families, the conviction the Physicians have in, um, going for medical exceptions process and then the fact that our payer coverage is getting better every day. I think all of the

Those things are going to be contributing to the growth over the next quarter.

[Analyst] (Morgan Stanley): Thank you. Congrats again.

Mike Riad: Thank you. Congrats again.

Thank you, Greenhouse again.

Operator: Thank you. We will take our next question. The question comes from the line of Paul Matteis from Stifel. Please go ahead. Your line is open.

Thank you. We will take our next question.

And the question comes from the line of Paul matis from stifel. Please go ahead. Your line is open.

Paul Matteis: Great. Thanks very much and congrats on the early launch progress. I guess taking a step back, given everything you kind of understand around this patient population, the degree to which families are plugged in and were waiting for AVLAYAH, do you think you're seeing a bolus right now? Might we see some attenuation in the ad rate later this year? Do you feel like this is actually potentially sustainable? As it relates to tau and the upcoming data next year, Ryan, I think you've talked about CSF tau data being an interesting early biomarker, given that PET changes can take some time. I'm wondering, though, that do you think your CSF tau data for the shuttle will be comparable to the CSF tau data for an intrathecal drug, given that IT-administered drugs can maybe bias CSF biomarkers given sort of the site of administration?

Paul Matteis: Thanks so much.

Great. Thanks. Very much. And congrats on the early launch progress. Um, I guess taking a step back given. Everything. You kind of understand around this patient population. The degree to, which families are plugged in and we're waiting for AA. Do you think you're seeing a bullish right now? Um, and, and might, we see some attenuation in the ad rate later this year? Or, or, or do you feel like this is actually, you know, potentially sustainable and then as it relates to Tau, and the upcoming data next year, um, you know, Ryan, I think you've talked about CSF, Tau data, being an interesting early biomarker, given that pet changes can take some time. I'm wondering, though, that, do you think your CSF cow data, for the shuttle will be comparable to the CSF cow data for an interface, the drug given that it administered. Drugs can maybe buy a CSF biomarkers given sort of the site of administration. Thanks so much.

Katie Peng: Thanks. I will take the bolus question first. Certainly you're correct that we expected this bolus. The bolus is bigger than we expected. I think the key thing that we're seeing is that this early experience from this initial patient population is translating to the broader population. Over time, especially as physicians gain more experience and the stories are shared more broadly through the patient community, we expect the growth to continue into the full eligible population.

Thanks. Uh, I will take the bus question first. Um, and certainly, you're correct, that we expected this bus. The bus is bigger than we expected, but I think the key thing that we are seeing is that this early experience from this initial patient population is translating to the broader population.

Um, and over time, especially as Physicians, gain more experience. And the stories are shared more broadly. Um, through the patient Community, we expect the growth to continue uh, into the full eligible population.

Ryan Watts: Thanks, Katie. Paul, fantastic question. Obviously very mechanistic. Obviously my kind of question. I think you're exactly right. It's really difficult to compare CSF tau in an intrathecally delivered molecule versus one that's delivered through capillaries, through the Transport Vehicle, through transferrin receptor. The experience we have related to this is actually with early days of ETV:IDS, now AVLAYAH, and its comparison with intrathecal delivery of iduronate 2-sulfatase, where there's a regional very high concentrations of enzyme. In this case, it would be high concentration of the antisense oligo. I think it's really apples to oranges in terms of percent reduction in what we would correlate ultimately with clinical benefit. What we can say is that our biodistribution is even and robust.

Thanks Katie, Paul. Fantastic question, obviously very mechanistic. You know, obviously my kind of my kind of question. I think you're exactly right. It's really difficult to compare.

Ryan Watts: When we look at different cell types throughout the brain and brain regions, we get basically roughly the same knockdown of gene expression across these various cell types. When we measure CSF levels of tau, we're confident that that's the level of knockdown we're getting throughout the brain. I think if you then relate that to maybe some disappointment in the maximal efficacy seen with intrathecal delivery, that may be simply because you're not penetrating deeper brain regions that may be impacted by tau and tau pathology. To the sort of first half of your question around CSF tau and tau PET, I think what's really remarkable, and we mentioned this at AAIC, the intrathecal data has essentially proven that tau PET can be reversed. That was actually a fundamental question, and many mouse models actually had never really necessarily shown that.

Delivered through, you know, capillaries through trans through the transport vehicle through transparent receptor. And the experience we have related to, this is actually with um, you know, early days of ETV IDs now AA and its comparison with intrathecal delivery of hydronic to sulfate where, you know there's a regional very high concentrations of enzyme. In this case it would be high concentration of the anti-sense all ego. Uh and so I think it's really apples to oranges in terms of like percent reduction and what we would you know, what we would correlate ultimately with clinical benefit. But what we can say is that our bio distribution is even uh and robust. So when we look at different cell types throughout the brain and brain regions, we get basically roughly the same knockdown of gene expression across these various cell types. So, when we measure CSF levels of Tau, we're confident that that's the level of knockdown, we're getting throughout the brain, and I think if you then relate that to maybe some disappointment,

And the maximal efficacy seen with intrathecal delivery, that may be simply, because you're not penetrating, you know, deeper brain regions. That may be impacted by Tau and, and Tau pathology. And then, to the sort of first half of your question around CSF, Tau and Tau pet. I think what's really remarkable? And I just, you know, we we mentioned this at AIC, um, the intrack data has essentially proven that Tau pet can be

Ryan Watts: In other words, if you reduce the expression of MAPT, which codes for tau, and then you reduce the expression of tau protein, over time, you start to see a reduction in the tau PET signal. If you look at the totality of the data, including the new data that's been presented, it seems like the shortest window is about 1 year from when they see tau PET reduction. The early data set didn't really show much reduction at 6 months, and then they looked later. It was either 18 months or 2 years. This data set shows that at 1 year they're seeing, albeit variable from patient to patient, and actually, if you look at the data sets carefully that have been published, some patients get no tau reduction by PET and others get robust. We think this is actually heterogeneity in intrathecal delivery.

Ryan Watts: The take-home is biodistribution is going to be critically important and different with the Transport Vehicle technology, and CSF tau will still be very informative, just like heparan sulfate CSF was informative for our Hunter program. We're not comparing percent reductions because of exactly the point you made. These are fundamentally different delivery approaches.

Reversed, that was actually a fundamental question, and many Mouse models actually had never really necessarily shown that. So, in other words, if you reduce the expression of map T which codes for Tau and then you reduce the expression of Tau protein over time, you start, you start to see a reduction in the Tau pet signal. And if you look at the totality of the data, including the new data that's been presented, it seems like the shortest window is about a year, uh, from when they see uh, Tau pet reduction, the early data set didn't really show much production at 6 months, and then they looked later. It was either 18 months or or 2 years this data set shows that a year. They're seeing I I'll be at variable from Patient to Patient. And actually, if you look at the data sets carefully, they've been published some patients, get no Tower reduction by pet and others get robust. We think this is actually heterogeneity in intrathecal delivery. And so the take-home is you know, biodistribution is going to be, you know, critically important and different with the transport vehicle technology.

And CSF towel will still be very informative just like Heparin sulfate. CSF was informative for our um um Hunter program. But we're not comparing percent reductions because of exactly the point you made these are fundamentally different delivery approaches.

Paul Matteis: Great. Thanks, Ryan.

Great. Thanks. Ryan.

Operator: Thank you. We will take our next question. The question comes from the line of Mayank Mamtani from B. Riley Securities. Please go ahead. Your line is open.

Thank you. We will take our next question.

And the question comes from the line of mayank mom Tali from B viley Securities. Please go ahead, your line is open

Mayank Mamtani: Good afternoon. Thanks for taking my questions, and congrats on a strong launch. Maybe, Ryan, on the prior point on the OTV MAPT strategy, are there any genetic tauopathies you could potentially look at? I'm just taking the logic that you're applying to the GRN program. There are FTD MAPT tauopathies also that could be looked at. Maybe just a higher level question. There's a lot still we need to see from a biomarker standpoint in the CVR study. What are sort of the right things to kind of look out for as we obviously think about the biomarkers we want to look at in your 68 cohort reading out next year?

Ryan Watts: Yeah. Great. Thanks, Mayank. Again, great questions. My take is I think with MAPT, the key point here is really focusing on tau reduction, showing that the OTV works, that you can deliver medicine systemically and get tau reduction. We're definitely interested in these genetic subpopulations, but our experience actually with FTD granulin is that initially it was very, very difficult to enroll these more rare cases. The tauopathies are not unlike FTD. In fact, there are FTD sort of tauopathies, so sort of rare, hard to diagnose initially, and then you have to genetically diagnose them. We're interested in that. I just don't think that it's the fastest path to really proving the platform and then subsequently driving for the first approval. In terms of what to look for, we're essentially looking for tau reduction in CSF, not really hitting a target.

Good afternoon. Thanks for taking questions and congrats on a strong. Maybe I don't on the trial. Point on the OTG map TV, uh, Saturday, are there any generic Dial Dial with you? Good credential, look at and just taking the logic that you're applying to the grn program. Uh, you know, there are FTB that that things also, that could be looked at and then maybe there's a higher level question. There's a lot, still, we need to, you know, see from a biomarker standpoint and we see, we are studying what that sort of the right things to kind of look out for. As you think about the Bayou Market, you want to look at in your, uh, 6 to 8 cohort, um, building out next next year.

Yeah, great. Thanks. May I, again great questions. I, you know, my um, uh, you know, my take, uh, is I, I think with map T? Um, you know, the, the key Point here is really focusing on, you know, Tower reduction showing that the OTV works that you can deliver a medicine systemically and get Tower reduction. Uh, we're definitely interested in these genetic sub-populations but our experience

Ryan Watts: The genetic data in mice suggests that the haploinsufficiency loss of one copy of tau is highly protective in the Alzheimer's models. You could imagine somewhere between 25% and 70% reduction. I think that fundamentally, what's actually very interesting about the data set that has recently been presented is that there was a non-dose proportional reduction in tau. As you go up 2x in dose and 4x in dose, there's only really about a 20% difference in overall tau reduction in that range. Yet there is sort of a different, obviously, AE profile for those higher doses.

Ryan Watts: We feel like the CSF data for intrathecal is apples to oranges, but we look at our own data and our own preclinical data and what's sort of been published to set the tone that we really need to see CSF tau reduction as really a proof of the platform. I don't know, Peter, if you want to add anything there.

Suggests that, you know, the haplo insufficiency loss of 1, copy of tau is is highly protective uh in the Alzheimer's models. And so you know that you know, you could imagine somewhere between 25 and you know, 70% reduction, but I think the fundamentally uh what's actually very interesting about the data set that has recently been presented, is that there was a non dose proportional reduction in Tau. So as you go up 2 x and dose and 4x and dose, there's only really about a 20% difference in in overall ta reduction in that in that range. Um, and yet there is sort of a different obviously a profile for those higher Doses. And so you know we we feel like the CSF data for intra is apples to oranges but we look at our own data and our own pre-colonial data and what sort of in published to set that the tone that, you know, we really need to see CSF Tower reduction as as as as really a proof of the platform.

Peter Chin: No, I think you covered it well. I think we're really focused on executing the program, generating the data that Ryan alluded to, and I think other potential indications is something that we can consider in the future.

I don't know Peter if you want to add anything there,

No, I think you covered it. Well, uh, I think we're really focused on executing the program and generating the data that, uh, Ryan alluded to. And I think other potential indications are something that we can consider in the future.

Mayank Mamtani: Thank you.

Thank you.

Operator: Thank you. We will take our next question. The question comes from the line of Ananda Ghosh from H.C. Wainwright & Co. Please go ahead. Your line is open.

Thank you. We will take our next question.

The question comes from the line of Fernando goes from HC. Wayne writing Co please go ahead. Your line is open.

Ananda Ghosh: Hi. Thanks, guys, and congrats on the great quarter. I have actually two questions. In 2025 CTAD, Biogen presented some data using their zirconium dye, where they tried to show their intrathecal, the tau modality, like how well they kind of distribute throughout the CNS. You would see that it's a very poor distribution. Now, the question is

Ananda Ghosh: Despite such a poor distribution, they do see, as you rightly mentioned, that they can move the clinical endpoints, at least in a trend way, trend setting. Just wanted to get your thoughts on that aspect of it, that even with such a poor distribution, how can they see some efficacy with respect to both as a biomarker as well as some clinical endpoints? The second question is, there are also these ideas that, and especially from the donanemab trial, that in patients where you have low tau, there you can see those patients are much more amenable to either both anti-beta therapy or anti-tau therapy. As you are thinking about your phase I-B, is there a way to enrich patients with low tau in your phase I-B trial population? Thanks.

Hi. Thanks guys, I'm congrats on the great quarter. I have actually 2 questions, you know in 2025 fur Biogen presented some data using this zirconium dye where they tried to show their intrical, you know, the toe that that our modality, uh, like how how well they kind of distribute throughout the CNS and you would see that you know, among you know it's a very poor distribution. Now the question is that you know despite such a poor distribution, they do see you know as you rightly mentioned some you know that they can move the clinical end points uh at least uh you know in a in a in a trend way.

Trend setting. And so just wanted to get your thoughts on that aspect of it. That how did you know? Even with such a poor Distribution on? How do how, how can they see, you know, some efficacy with respect to both as a biomarker as well as some clinical end points. The second question is, you know, there are also these ideas that and especially from the donen mab trial that, you know, in a in in patients where you have low toe, uh, uh, there there. You can you can see, you know, those patients are much more amenable to either both Abita, anti antibiotic therapy or anti therapy. So, you know, as you are thinking about your

Ryan Watts: Yeah. Good questions. I'll try to be brief because we have a number of other questions. I think, let's look at additional data that hopefully will be presented on BIIB080 to really understand that dynamic. You're right, there's enormous heterogeneity. There is, and we've published this already in monkey. I think the positive clinical signal across three different endpoints, ADAS-Cog, CDR-SB, and MMSE is really encouraging. There are some patients that get really decent biodistribution in the particular study that you're referencing. I think that's the main point.

Fees 1B. Uh, do do, is there a way to enrich patients with low in your Phase 1? Be, uh, patient. Uh, you know, the trial population. Thanks yeah. Good good questions. I'll try to be brief because we have a number of other questions so I think, you know, let's look at additional data that hopefully will be presented uh on Bibb 80 to really understand that Dynamic. But you're right there's enormous heterogeneity there is in, you know, we've published this already in Monkey um and so I think the the positive clinical signal across you know 3 different end points. 8 ascog CD are some of boxes in MMC is really encouraging uh and and there are some patients that get you know really decent bio distribution in the in the particular study that you're referencing. Um uh and so I think that you know that that's I think the the main point

Ananda Ghosh: Great. Thanks.

Great, thanks.

Operator: Thank you. We will take our next question, and the question comes from Joseph Thome from TD Cowen. Please go ahead. Your line is open.

Thank you. We will take our next question and the question comes from Joseph, Thorne from TD Co and please go ahead. Your line is open.

[Analyst] (TD Cowen): Hi, this is Jacob on the line for Joe. Thanks for taking our question. Kind of going along with patient enrichment or kind of patient selection, I was curious how you're thinking about some of these co-pathologies that often come along with AD, like alpha-synuclein and TDP-43, and how those could play a role in patient selection or kind of pre-specified subgroup analyses. Just additionally, looking farther ahead, how you're thinking about what a bar might look like given some of the currently approved amyloid beta therapies on things like CDR-SB. Thanks.

Hi. This is Jacob on the line for Joe. Thanks for taking our question. Uh kind of going along with uh you know, patient enrichment or uh kind of patient selection. And I was curious how you're thinking about uh some of these Co pathologies that often come along with ADD like uh Alpha nuclear and a TDP 43 and how those could play a role in patient selection or kind of please pass pre-specified.

Subgroup analysis.

And then just additionally, um, looking farther ahead, how you're thinking about, you know, what a bar might look like, given some of the currently approved analog data therapies on, uh, things like CDRC. Thanks.

Ryan Watts: I'll address the first one on the co-pathologies, Peter, why don't you address the bar on, I'm assuming what you're asking is the bar for approval or for clear differentiation with the-

[Analyst] (TD Cowen): Yeah

Ryan Watts: existing anti-amyloids. Yeah. I think with co-pathologies, the two, obviously the most common co-pathology, which is actually in some ways defines Alzheimer's, is A-beta plaque or amyloid plaque and tau neurofibrillary tangles. I think what you're referencing is also it's been shown like, you see Lewy bodies and other sort of vascular pathologies. The challenge with those type of co-pathologies is there aren't imaging biomarkers yet that allow you to look at the level of, let's say, Lewy bodies that can also be observed with amyloid plaque or tau. At this point, our focus is on the two most common and prevalent. I'll add that there's, by the way, a fourth one, TDP-43 pathology, which I think represents roughly 30% of Alzheimer's. All of this being said, amyloid appears to be at the top of the cascade.

I'll I'll address the first, 1 on the copath, and then Peter, why don't you address the bar on? Assuming what you're asking is the bar for for approval or for like clear differentiation with the existing anti amloid?

Alzheimer's is a beta plaque or Amal plaque, and, and, and Tau neuro flood rate Tangles. I think what you're referencing is also, it's been shown, like, you know, you see Lewy bodies, um, and other sort of vascular, pathologies the challenge with those type of cope pathologies that aren't Imaging biomarkers, yet that allow you to look at the, the, the level of let's say Lewy bodies that can also be observed with Amoy plaque, or, or Tau. And so at this point, our focus is on the 2, most common and prevalent. Um all that there's by the way, a fourth 1 TDP 43 pathology which I think represents roughly 30% of of Alzheimer's.

Ryan Watts: Amyloid eventually drives the formation of tau pathology, tau pathology correlates with cognitive decline. We're keen on targeting both amyloid and tau. I think as biomarkers improve, hopefully we'll be able to identify patients that have other pathologies, which in some ways is probably complicating the clinical picture. With that in mind, I'll hand it to Peter to talk about what the bar might be for anti-amyloid approvals.

Peter Chin: Thank you, Ryan, and thanks for the question. I think I'll start by saying this is a very exciting time for Alzheimer's. Coming off the vast amount of data that was presented at AAIC, there's a lot that's being learned about different aspects of the patient populations. I think it's premature to say exactly where we're headed. I do think that with all the data that's being generated and understanding both progression rates and response of different types of therapies, this is something that we'll definitely pay attention to, both with targeting tau as well as with amyloid. I think from an amyloid perspective, we're very excited about the differentiating potential of DNL921, and I think our goal is really to generate proof of concept with that first.

All of this being said, alloid appears to be at the top of the Cascade so Amoy eventually drives the formation of Tau pathology. And then Tau pathology correlates with, you know, cognitive decline. And so we're keen on, you know, targeting both ammo and Tau, and I think as biomarkers improve, um, you'll be able to see, hopefully, we'll be able to identify patients that have other pathologies, which, you know, in some ways is probably complicating the clinical. Uh, the clinical picture with that in mind, I'll, I'll hand it to Peter to talk about what the bar might be for anti-al approvals.

Yeah, thank you, Ryan, and thanks for the question. I'm going to—I think I'll start by saying this is a very exciting time for Alzheimer's, and coming off the vast amount of data that was presented at AIC, there's a lot that's being learned about.

different aspects of the patient populations. I think it's premature to say exactly where we're headed, but I do think that with the

With all the data that's being generated and understanding, uh, uh, both progression rates and response of different types of therapies. This is something that will definitely pay attention to both with the targeting how, as well as with I think from a from an AMOLED PPE, we're very excited about the differentiating potential of DNL 921 and um I think what our goal is really to generate proof of concept with that first

[Analyst] (TD Cowen): Great. Thank you.

great. Thank you.

Operator: Thank you. We will take our next question. The question comes from the line of Laura Chico for Wedbush. Please go ahead. Your line is open.

Thank you.

We will take our next question.

The question comes from the line of law. Chico from wedbush, please go ahead. Your line is open

Laura Chico: Hi. Thanks very much for taking the question. Congrats, guys, on the quarter. Maybe one for Katie. I'm wondering if you could expand a little bit further, what capacity do the centers have for switch patients? Just wondering if there's any additional considerations that the physicians need to work through for a switch patient versus perhaps somebody that's new to treatment. You indicated in the webinars that you encompass or encountered over 100 families or about greater than 25% of the eligible patient pool. I guess I'm just trying to understand if there's any capacity considerations that we should be making as you're progressing here. Thanks very much.

Hey thanks very much for taking the question. Congrats guys in the quarter. Um maybe 1 for Katie, I'm wondering if you could expand a little bit further, what capacity do the centers have for switch patients? Um just wondering if there's any additional considerations that the Physicians need to work through for a switch patient versus perhaps somebody that's new to treatment you indicated in the webinars that you can come.

Katie Peng: Thank you, Laura. That's a great question. You're exactly right. There are definitely dynamics both for the newly diagnosed patients and for the switchers. As you remember, majority of the aducanumab patients are treated at home. These are patients coming back to the clinic. Definitely infusion scheduling is one of the steps that families have to work through. With all the families coming back, there is a sequencing, depending on if you're at a center that has specialized centers of care, they are going to have a little bit more capacity than other centers. That is a dynamic that has significant variability that we're going to be working through. What we've seen is the sense of urgency and the motivation from families have been very strong.

Campus or encountered over 100 families or but greater than 25% of the eligible, patient pool. So I guess I'm just trying to understand if there's any capacity considerations that we should um be making as you're progressing here. Thanks very much.

Laura Chico: Thanks very much.

Thank you. Laura, that's a great. Great question and and you're exactly right. There are definitely Dynamics both for the newly diagnosed patients and for um the switchers, as you remember, um, majority of the adults are for a patients are treated at home um and so these are patients coming back to the clinic and definitely infusion scheduling is um is is is 1 of the steps that families have to work through? And so with all the families coming back, there is a sequencing depending on the center, you know. Uh, depending on if you're at a center that has specialized centers of care, they are going to have a little bit more capacity than other centers. So that is the dynamic that has significant variability, um, that we're going to be working through. But what we've seen is the sense of urgency and the and and the motivation from families have been very strong.

Thank you very much.

Operator: Thank you. We will take our next question. The question comes from Marc Goodman from Leerink Partners. Please go ahead. Your line is open.

Thank you.

We will take our next question.

And the question comes from Mark Goodman. From layering Partners, please go ahead, your line is open.

[Analyst] (Leerink Partners): Hi. Good evening, everyone. This is Alyssa on for Marc. Thank you for taking our question. I was wondering if you could help us think about the average price per patient for AVLAYAH, given the weight-based dosing and titration schedule. Since many patients will initially be uptitrating over the course of the first few months, when should we expect pricing to reach a steady state run rate? Secondly, on the manufacturing facility in Salt Lake City, do you have any plans to use that facility to manufacture commercial batches of AVLAYAH, or will that be used only for clinical manufacturing? Thank you.

Alyssa Larios: Hi. Good evening, everyone. This is Alyssa on for Marc. Thank you for taking our question. I was wondering if you could help us think about the average price per patient for AVLAYAH, given the weight-based dosing and titration schedule. Since many patients will initially be uptitrating over the course of the first few months, when should we expect pricing to reach a steady state run rate? Secondly, on the manufacturing facility in Salt Lake City, do you have any plans to use that facility to manufacture commercial batches of AVLAYAH, or will that be used only for clinical manufacturing? Thank you.

Hi, good evening everyone. This is Alyssa on for mark. Thank you for taking our question. Um, I was wondering if you could help us think about the average price per patient for AA given the weight-based dosing and titration schedule. Um, since many patients will initially be up titrating, uh, over the course of the first few months, I want you to be expect pricing to reach, a steady state, um, run rate and then secondly on the manufacturing facility in Salt Lake City. Do you have any plans to um use that facility to uh um manufacture commercial batches as of Leia? Or will that be used only for clinical Manufacturing?

Thank you.

Katie Peng: Great. Thanks. I'll address the pricing question. At maintenance, for a 10 kg patient, it's roughly around $270,000 per year, and up to 30 kg patient, which is about $800,000 per year. As you described, there is a dose escalation described in our label. What's been provided to physicians, and this is ultimately a physician's decision on how quickly to do the escalation, is that we expected the escalation to be about 4 weeks at each step before they get to maintenance dose. There may be variability as patients dose escalate, depending, and it'll be very individualized and physician-decided.

And up to, uh, a 30 kg patient, which is about 800,000 per year. And as you described, there is a dose escalation, um, described in our label. And what's, um,

What's been provided to Physicians and this is ultimately Physician's decision on how quickly to do the escalation. Is that we expected to escalation to be about 4 weeks at, uh, each step before they get to maintenance dose and there may be variability. Um, as patients, uh, does escalate depending and it'll be very individualized and Physicians decided

Ryan Watts: I'll answer the second question. We do not have plans to manufacture in Salt Lake City for AVLAYAH. In fact, our plans are to go to larger scale with Lonza and onshore to Portsmouth to go to 6,000 L.

And then I'll answer the second question. We do not have plans to, um, uh, manufacturer in Salt Lake City for AA. In fact, our plans are to go to larger scale, um, uh, with lansa and and onshore to Portsmith, to go to 6000 liter

[Analyst] (Leerink Partners): Okay. Thank you very much.

Alyssa Larios: Okay. Thank you very much.

Okay, thank you very much.

Operator: Thank you. We will take our next question. The question comes from Michael Dufour from Evercore ISI. Please go ahead. Your line is open.

Thank you. We will take our next question. The question comes from Michael Door from Epicor ISI. Please go ahead. Your line is open.

Michael Dufour: Hi, guys. Thanks so much for taking my question, and congrats on the progress so far. Two from me. Now that you have a full commercial quarter under your belt, at this juncture, could you give us the number of patients on drug as well as the number of cumulative start forms? If not, when might you be able to share this information? The second question is, as patients switch off of ELAPRASE, have you seen any competitive response from Takeda, either on contracting pricing, or account-level pushback for that matter? Thank you.

Michael DiFiore: Hi, guys. Thanks so much for taking my question, and congrats on the progress so far. Two from me. Now that you have a full commercial quarter under your belt, at this juncture, could you give us the number of patients on drug as well as the number of cumulative start forms? If not, when might you be able to share this information? The second question is, as patients switch off of ELAPRASE, have you seen any competitive response from Takeda, either on contracting pricing, or account-level pushback for that matter? Thank you.

Hi guys, thanks so much for taking my question and congrats on the, uh, progress so far. Uh, 2 for me. Now that you have a full commercial quarter under your belt, uh, at this juncture. Could you give us the number of patients on drug as well as the number of cumulative? Start forms? And if not, when might you be able to share this information?

Um, and second question is, as patients switch off of elra. Have you seen any competitive response from ticada? Uh, either on Contracting pricing or, uh, account level, pushback for that matter. Thank you.

Katie Peng: Okay. Let me see if I can address all the questions. Your first question was on start forms and patient numbers. At this stage, we intentionally focus on communicating the overall trajectory rather than providing individual operational metrics. Right? I shared earlier why we have confidence is we're seeing all of the progress with the various stakeholders within the ecosystems, with physicians being highly aware and engaged, families highly engaged and driving towards switching, as well as centers working through reimbursement and payer access. With regard to start forms, we also feel that at this point, start forms are not predictive of revenue. It's because each individual patient journey is very unique. The time, depending on what their insurance plan is, which centers they're getting treatment at, that is highly variable at this point.

Okay, let me see if I can address, uh, all the questions. So, your first question was on start forms and patient numbers. Um, so at this stage, we intentionally focused on communicating the overall trajectory rather than providing individual operational metrics. Right? So, I shared earlier why we have confidence is, we're seeing all of the progress with the various stakeholders within the ecosystems, with Physicians, being highly aware, um, and engage families, highly engaged, and driving towards switching, um, as well as centers working through reimbursement and, and payer access, um, with regard to start forms. We also feel that at this point start forms are not predictive of of Revenue and it's because

Katie Peng: We haven't provided guidance as to when in the future we may provide patient or start form information. For now, we really want our investors to rely on the revenue guidance because we feel like it's the most clear quantitative indicator of how our launch is progressing. I think those were. Did you have one more question?

Each individual patient. Journey is very unique and the time depending on what their insurance plan is, which centers they're getting treatment at that is highly variable at this point. Um, and we haven't provided guidance as to when in the future, we may provide patient or or start form information but for now we really want um our investor to rely on the revenue guidance because we feel like it's the most Quant. Most clear quantitative indicator of how our launch is progressing.

Michael Dufour: Yeah, I did. Just regarding the switch off from ELAPRASE.

Michael DiFiore: Yeah, I did. Just regarding the switch off from ELAPRASE.

Katie Peng: Oh.

Michael Dufour: Any competitive response from Takeda that you've seen?

Michael DiFiore: Any competitive response from Takeda that you've seen?

I think those were, oh, did you have 1 more question? Yeah, I did just regarding the, uh, the switch off from from L any any competitive response from dakada that you've seen.

Katie Peng: Yeah. In terms of competitive response, we've been very much focused on making sure that the clinical value and the biomarker data is well-recognized. I think we haven't seen a ton of pushback because it's very well-recognized that ELAPRASE does not address neurologic manifestations. We haven't seen the other activities that you've described, which is contracting, and I think you've described another one, but we haven't seen any activity related to that.

Yeah. So in terms of competitive response, you know, we've we've been very much focused on, um, making sure that the clinical value and, uh, the biomarker data is well recognized. So I think we haven't seen a ton of push back because it's very well recognized. That lapra does not address neurologic manifestations um and we haven't seen the other activities that you've described which is Contracting and I think you described another 1 but we haven't, we haven't seen any activity related to that.

Operator: Thank you. We will take our next question. The next question comes from Myles Minter from William Blair. Please go ahead. Your line is open.

Thank you.

We will take our next question.

The next question comes from milesman from William Blair. Please go ahead. Your line is open.

[Analyst] (William Blair): Hey, team. This is John. I'm from Myles. Congrats on a strong first launch quarter, and thanks so much for taking our question. For AVLAYAH, wondering if any of your commercial patients have previously been clinical trial participants. Wondering if you can give us any color on the cadence you expect for clinical trial participants to transition over to commercial therapy.

Um hey team. This is John I'm from is congrats on a strong first launch quarter and thanks so much for taking our question. Uh, so far wondering if uh any of your commercial patients, have previously been, clinical trial, participants um and wondering if you can give us any color on this Cadence, you expect for uh clinical trial participants to transition over to commercial therapy.

Katie Peng: Yeah. The majority of patients that have started today are not actually our clinical trial patients. We expect all of our clinical trial patients to be able to convert to commercial patients by the end of this year.

Yeah. So um

The majority of patients that have started to date are, um, not actually our clinical trial patients. We expect, um, all of our clinical trial patients to be able to, uh, convert to commercial patients by the end of this year.

Operator: Thank you.

Peter Chin: Thank you.

Thank you. Thank you.

Operator: We will take our next question. The question comes from David Hong from Deutsche Bank. Please go ahead. Your line is open.

To take our next question.

And the question comes from David Hoang from Deutsche Bank. Please go ahead. Your line is open

[Analyst] (Deutsche Bank): Hi, this is Rosemary on for David. Thank you so much for taking my question, and congrats on the quarter. I was just wondering how you might be thinking about the competitive landscape evolution for AVLAYAH, as there's some competitor resubmission happening this year and JCR Pharmaceuticals's ex cargo maybe having a global phase III readout next year. Thank you.

Katie Peng: Yes. Thanks for that question. Of course, we're always very encouraged to see continued innovation in Hunter syndrome, we are very confident in our biomarker and clinical evidence. As you know, we've shown normalization for the first time in this disease area for key disease biomarkers, our focus is on executing on our launch and driving the momentum that we're seeing today. Thank you.

Hi, this is Rosemary on for David. Thank you so much for taking my question, and congrats on the quarter. I was just wondering how you might be thinking about the competitive landscape evolution for AA, as there's some competitor resubmission happening this year, and KCR Pharma—as is Cargo—maybe having a global Phase 3 readout next year. Thank you.

Yes, thanks for that question. Of course we're always very encouraged to see continued innovation in Hunter syndrome but we are very confident in our biomarker and clinical evidence. Um, as you know, normal is we've shown normalization for the first time in this disease area, um, for Chi disease biomarkers. And uh, our focus is on executing on our launch and driving the momentum that we're seeing today.

Thank you.

Operator: Apologies for the delay. We will take our next question. Your next question comes from the line of Charles Moore from Baird. Please go ahead. Your line is open.

Apologies for the delay. We will take our next question.

Your next question comes from the line of Charles Moore from bed. Please go ahead. Your line is open

Charles Moore: Hey, guys. Thanks for taking the question, and congrats on the great quarter. Just kind of following up on the last question. I recall your analogous trial for AVLAYAH included patients who had been treated with gene therapy. Looking toward the DNL126 trial, are there any patients there who have been treated with a gene therapy previously, considering that there's the possibility for a Sanfilippo gene therapy to be approved ahead of DNL126? Thank you.

Hey guys, thanks for taking the question, and congrats on the great quarter.

Just kind of following up on the last question. I recall your analogous trial for AA included patients, who had been treated with gene therapy. So looking uh toward the DNL 126 trial. Are there any patients there? Who have been treated with a gene therapy? Um, previously considering that there's the possibility for a sinful Lipa. Gene therapy to be approved ahead of DNL 126. Thank you.

Ryan Watts: Peter, maybe I'll have you take that. I'll just make one comment. We haven't gone into great detail on the DNL126 patient population, obviously presented new data earlier this year at WORLDSymposium and very excited about that program. Great question around the competitive landscape. Peter, do you want to add anything to that? I just don't think we've gone into much detail on the nature of those patients.

Peter, maybe we'll have you take that, I'll just make 1 comment that we haven't gone into great detail on the 1 126 uh, patient population. But you know obviously presented new data uh, early earlier this year world and very excited about that program. But but uh, great question around the competitive landscape

Peter Chin: Thanks, Ryan. I would just say we haven't presented the baseline characteristics of the full cohort yet. We do intend to present the data early next year at the WORLDSymposium.

Ryan Watts: I'll just add, great memory. We did have both gene therapy and cell therapy patients in the Hunter data set and where we saw robust normalization in those patients' data in terms of CSF, heparan sulfate. I think the key here is really focused on the sustained biomarker response across our ETV franchise. Thanks for the question.

Peter, do you want to add anything to that? I just don't think we've gone into much detail on the, the nature of those patients. Yeah, thanks Ryan. Yeah, I would just say, um, we, we haven't presented the Baseline characteristics of the full cohort yet, um, but we do intend to present the data early next year at the world Symposium. Yeah. And and I'll just add, you know, great memory. We did have both uh gene therapy and cell therapy patients in the Hunter data set. Um and where we saw, you know, robust normalization in in those patients data, in terms of of CSS, Heparin sulfate. But I think the key here is really focused on the sustained biomarker response, uh, across our ETV franchise.

Charles Moore: Got it. Yep, thank you very much.

Thanks for the question, got it?

Yep, thank you very much.

Operator: Thank you. This concludes today's question and answer session. I'll now hand the call back to Ryan Watts for closing remarks.

Operator: Thank you. This concludes today's question-and-answer session. I'll now hand the call back to Ryan Watts for closing remarks.

Thank you. This concludes today's question-and-answer session. I'll now hand the call back to Ryan for closing remarks.

Ryan Watts: We thank everyone for joining the call today. We're very excited about where we are and look forward to continued momentum. Thanks, everyone.

We thank everyone for joining the call today. We're very excited about where we are and look forward to continued momentum. Thanks, everyone.

Operator: This concludes today's conference call. Thank you for participating. You may now disconnect.

This concludes today's conference call. Thank you.

participating, you may now disconnect

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