Good afternoon, and welcome to the Sarepta Therapeutics First Quarter 2025 Financial Results Conference Call. As a reminder, today's program is being recorded. At this time, I'll turn the call over to Mary Jenkins, Associate Director, Investor Relations. Please go ahead.

Thank you, Marvin, and thank you all for joining today's call. Earlier this afternoon, we released our financial results for the first quarter of 2025. The press release, slides and supplementary information are available on the Investor section of our website at sarepta.com, and our 10-Q was filed with the SEC this afternoon. Joining us on the call today are Doug Ingram, Ian Estepan, Dallan Murray and Dr. Louise Rodino-Klapac. After our formal remarks, we'll open the call for Q&A. I'd like to note that during this call, we will be making a number of forward-looking statements. Please refer to Slide 2 on the webcast, which contains our forward-looking statements. These forward-looking statements involve risks and uncertainties, many of which are beyond Sarepta's control. Actual results could materially differ from these forward-looking statements, and any such risks can materially and adversely affect the business, the results of operations and trading prices for Sarepta's common stock. For a detailed description of applicable risks and uncertainties, we encourage you to review the company's most recent SEC filings. The company does not undertake any obligation to publicly update its forward-looking statements, including any financial projections provided today based on subsequent events or circumstances. As noted on Slide 3, we will discuss non-GAAP financial measures on this webcast. Descriptions of these non-GAAP financial measures and reconciliations of GAAP to non-GAAP financial measures are included in today's press release and the slide presentation available in the Investors section of our website. And now, I'll turn the call over to our President and CEO, Doug Ingram, who will provide an overview of our recent progress. Doug?

Thank you, Mary. Good afternoon, everyone, and thank you for joining Sarepta Therapeutics first quarter 2025 financial results conference call. Across biotech and indeed the market more generally, the first quarter of 2025 has been a challenging one. Likewise, for Sarepta, we have faced challenges that have motivated us to take a more measured view for the remainder of 2025. Fortunately, Sarepta is in a better position than most of biotech today, as we have a significant number of approved therapies and significant revenue, a strong P&L and balance sheet and the ability to continue to independently drive our portfolio of gene therapies and siRNA programs. we are well positioned to weather this chaotic period. In the first quarter of 2025, we achieved $612 million in total net product revenue, representing 70% growth over the same quarter last year. Our PMO franchise grew 5%, achieving $237 million for the quarter and ELEVIDYS achieved sales of $375 million in the quarter, representing a 180% increase over the same quarter last year. While our ELEVIDYS first quarter growth still represents the most successful in vivo gene therapy launch yet in history, in fact in Q1, we treated more patients with gene therapy than ever before in the US in a single quarter, we nevertheless fell short of expectations. In a moment, Dallan will explain some of those quarterly factors including administrative issues, a severe flu season that resulted in delays and the effect of the recently reported safety event that motivated some families with scheduled infusions to pause for additional information. Looking forward, we are changing our net product revenue guidance for the year to $2.3 billion to $2.6 billion across our four approved therapies. This change is driven by three factors. First, as you know, we recently reported that a boy…

Thank you, Doug, and good afternoon. My comments today are focused on three areas, context for what happened in Q1, how we plan to achieve our revised full year guidance for 2025 and what gives us confidence in our ability to achieve that guidance. Regarding our Q1 performance, in addition to the safety event, there were two issues that impacted our results late into the quarter. Firstly, the severe flu season caused a number of patients to delay their infusion dates. Secondly, we faced administrative issues at some sites, the most impactful of which was with Medi-Cal, California's Medicaid program that pushed out patients infusion dates. Importantly, these specific administrative challenges have now been successfully resolved. Now, I'll outline how our first quarter performance reformed our revised guidance and the actions we'll take. First, the safety event led some patients and families scheduled for late March dosing to delay treatment while they sought out more information. We immediately initiated extensive outreach to our leading treaters in the broader community. Conversations have revealed that access to comprehensive safety data, including our biomarker safety data, which Louise will discuss in her prepared remarks, in conjunction with the two-year EMBARK data provides the necessary context for health care providers and patients to move forward with confidence. Our current focus is on disseminating this information across the wider treating and referring physician landscape, which is a process that takes time. As a result, we anticipate Q2 revenue could be as much as 20% lower than Q1. Looking ahead, we project a pickup in demand beginning in the summer and extending through the remainder of the year. Therefore, our long-term demand outlook for the therapy remains strong, and we expect only a temporary impact. Furthermore, we are encouraged that we continue to receive enrollment forms…

Thank you, Dallan. The role of science in transforming patient lives has never been more important than it is at this moment. At Sarepta, science is foundational to who we are. I'll focus my comments today in three areas, ELEVIDYS, including additional data that supports safety and efficacy, the progress we've made in advancing our limb-girdle portfolio, solidifying our scientific leadership in neuromuscular diseases and the momentum behind our siRNA therapies, including the opportunity they hold to be best in class. Further, we are excited to share the depth of our research at our upcoming R&D Day later this year. This work will fuel future innovations to treat diseases for which therapies are either nonexistent or inadequate. Beginning with ELEVIDYS, we provided data to the FDA, and we'll continue to work with them on any necessary updates to the ELEVIDYS label or monitoring requirements. Safety remains our top priority and as we have these past weeks beginning at MDA, we will continue to ensure that our community stakeholders are informed in a timely manner and that we address their questions. Regarding safety, in patients treated with ELEVIDYS, we see no difference in the rates of adverse events and relationship to age or weight. Furthermore, no relationships have been identified between the liver safety biomarkers, bilirubin, GGT and INR and the total dose administered for patient age or patient weight. Shown on this slide are bilirubin values versus all cohorts in Study 103 and EMBARK. Regardless of whether it's change from baseline, absolute peak or peak value, there is no correlation with weight or age. The same holds true for cardiac safety biomarkers, including troponin. The totality of our data in over 800 patients support safety of ELEVIDYS weight-based dosing across the label population of patients with Duchenne, regardless of ambulatory…

Thanks, Louise, and good afternoon, everyone. This afternoon's financial results press release provided details for the first quarter of 2025 on a GAAP basis as well as a non-GAAP basis. Please refer to our press release available on Sarepta's website for a full reconciliation of GAAP to non-GAAP financial results. Beginning in the first quarter of 2025, the gains and losses on mark-to-market of strategic investments are excluded from our non-GAAP results. For comparison purposes, non-GAAP financial results for the first quarter of 2024 have been updated to reflect this change. In Q1, we delivered strong year-over-year growth in revenue, continued disciplined approach to investment in R&D and SG&A and maintained our strong cash position with $647 million in cash, cash equivalents and investments and restricted cash as of the end of the quarter, and $600 million of additional liquidity available through our revolver. The decrease in our cash balance from last quarter was due to the funding of the Arrowhead collaboration upfront consideration of $825 million with cash on hand. Note, we have reported a Q1 GAAP and non-GAAP operating loss of $300 million and $250 million, respectively, both included a $584 million of R&D expense associated with our global licensing and collaboration and stock purchase agreement with Arrowhead. Excluding this transaction, we are reporting a GAAP and non-GAAP operating profit of $283 million and $334 million, respectively. In the first quarter, we delivered $612 million in total net product revenue, representing year-over-year growth of 70%. ELEVIDYS net product revenue was $375 million and grew 180% year-over-year and net product revenue from our PMO exon skipping franchise was $237 million, up 5% over the prior year. In Q1, we recognized $133 million of collaboration and other revenues. This primarily reflects $112 million of collaboration revenues related to Roche expired…

Thank you very much, Ian. Marvin, let's open the line for Q&A.

[Operator Instructions] Our first question comes from the line of Tazeen Ahmad of Bank of America Securities. Your line is now open.

Hi, guys. Good afternoon, and thanks for taking my question. So, Doug, I just wanted to ask you, on those three factors that you mentioned right at the beginning of the call, the capacity issues, the administrative processes that you mentioned and the results of the patient death, leaving families to have questions, which one, if any, has been the biggest driver of potential downside pressure leading you to revised guidance? And then as 2Q has progressed, have any of those I guess, gotten worse because you're talking about 20% lower sales relative to 1Q and we're still pretty, I guess, relatively early into the quarter. Thanks.

Thank you for your question. So first, on the balance, it is a mix of all three. I think the cycle times is probably the one that mechanically affects forward guidance the most. But there's a bit of a mix there. What we're seeing going forward is that it’s not a worsening. In fact, again, we don't have enough data on the cycle time issue to suggest that we're being overly conservative. But we're at a minimum confident that we've hit steady state. There's some reason to believe it might be a bit conservative. I mentioned earlier in the call, the first quarter had the most severe flu season, I think, in 15 years, and that caused some delays. There's the typical insurance changes that occur in the first quarter of every year. That causes some delays. There's a thesis that may be embedded in this four to six weeks additional cycle time might be some of that -- those particular first quarter issues. But I think for planning purposes, we're assuming and I certainly think you should also assume that we're at steady state for the year. We have a lot of work to do, we're trying to do even more efficiently, but I don't think we should assume that we will. On the safety event, the issue, of course, to remember is that in the when the safety event occurred, it was right before March. So right the last month of the quarter. So of course, those who needed additional information, we're going to have delays and that is going to flow through into the second quarter as well. So it shouldn't be at all surprising that the second quarter would be soft as a result of that and so we're, of course, we're seeing that. And that's…

Thank you. One moment for our next question. Our next question comes from the line of Ritu Baral of TD Cowen. Your line is now open.

Good afternoon, guys. Thanks for taking the question. Doug, I want to follow up on that last phrase that you mentioned, how do you direct patients to those sites with more capacity? Are we talking like more community sites and why aren't these sites sort of at capacity like the main centers? Is it a staffing issue? Is it a demand issue? How do you plan on doing that? And is this the point where you think about opening more sites?

I don't think as we sit here today that it's a number of sites issue. I think it's a focus issue. So really, the issue is -- and it should be of no surprise when you first launched a therapy, we really prioritize the big sites with the real thought leaders with a lot of experience and a lot of start forms, and we've spent a lot of time there. We've spent obviously, time on other sites, and they're all well trained, but we have spent as much time there with a lot of the good educational work that we need to do, including responding to this most recent safety event, but even beyond that, and frankly, in a more positive note, really getting out and talking about the brilliant data that came out on the crossover. Remember, that data is just lights out. I mean it's -- kids on the therapy for two years were statistically significantly better than natural history on every single functional [measure] (ph), even at the one-year mark, when you get to the older ages because, of course, the kids dosed in the second phase of the trial, we're older now. Now they're in the decline phase, which is 1 of the problems with our original study as it relates to NSA. They are significant statistically on every measure, including NSA. And then you saw the trajectory analysis. And then you saw the muscle MRI, do you want to linger on that muscle MRI. That's a really powerful thing. I think there was probably a moment when some of us wondered whether you would actually be able to see in 1 year a really significant difference in muscle quality, what you do across a significant number of muscles, you see this very different result where kids that have been dosed with ELEVIDYS have their muscle preserved and much less fat in fibrotic tissue and kids that didn't get dosed a year later are missing a lot of that muscle and have a lot of infiltration of fat and fibrotic tissue. We see to get all of that information and have those conversations with those secondary sites. What we can't do in any real way or in a thoughtful way to sort of redirect people's start forms from one site to another. That's really not possible. What we can do is really spend a lot of time with them, spend a lot of energy with them and spend a lot of education with them as well as making sure that we're educating the patient community across the United States. And I think it is going to create significant dividends, both I think for us and our revenue, but far more important than that, getting kids infused that are going to benefit from this life-changing therapy. Thank you for your questions, Ritu.

Thank you. One moment for our next question. Our next question comes from the line of Louise Chen of Scotiabank. Your line is now open.

Hi, thanks for taking my question here. I wanted to ask you, of the new guidance you gave, what percent of sales does ELEVIDYS represent? And also, are you planning or expecting that sales will recover starting in the third quarter? Thank you.

So the -- two answers to that. Obviously, we're pulling our guidance down primarily -- well, exclusively really from ELEVIDYS. So you can do the math on that. This is an ELEVIDYS related issue. And then yeah, we are assuming starting in the summertime soon, and starting really in the second half of the year that we're going to see a significant uptick. We're already seeing, again, using a hackneyed phrase, the green shoots of that. But what we really do know when we've talked to a lot of physicians is there are a lot of families that prioritize the summer program. There's a lot of monitoring that goes on with this therapy. Lot of times, people have to travel with this therapy. There are other family members and brothers and sisters to be considered. And so we really are expecting and we believe we're going to see a significant uptick starting in the summertime plus the back half of the year as we execute. And we will execute.

Yeah. Very specifically, we gave guidance of $900 million for our PMO. We maintained the guidance of $900 million from our PMO franchise. So the revision in our total net product revenue was all related to elevators.

Thank you. One moment for our next question. And our next question comes from the line of Andrew Tsai of Jefferies. Your line is now open.

Hi, thanks for taking my [Technical Difficulty] My question is around this -- following this patient death, some investors are wondering about a worst-case scenario where ELEVIDYS is pulled from the market, something more drastic basically than what your revised guidance assumes. The appointment -- and the appointment of Dr. Prasad today might not help with that narrative. So can you walk us through how you think about that potential risk, especially since you do have an accelerated approval in the non-ambulatory DMD. Thanks.

Sure, sure. First, on the appointment, I want to be clear, I'm not going to obviously comment on any particular appointment, which we just got news of today. What I do remain confident about is that the FDA is going to be the FDA that it's been for the last 100 years, which is an organization dedicated to following great science and fulfilling its mission of bringing life-enhancing therapies that are safe and efficacious to patients. And there's no reason to believe that, that should change or that anyone would permit that to change. I would remind you as it relates to ELEVIDYS, the evidence for its approval was brilliant at the time absolutely remarkable and then only got more impressive over time following a positive Advisory Committee meeting. We got the original approval. The totality of evidence was clear that we were changing the trajectory of this disease. And then thereafter, we have the crossover data that we unblinded all prespecified every functional measure was strongly statistically positive, the muscle MRI is brilliant. There's no doubt that this therapy is changing the lives of patients. There is no reason to believe that this safety event would be the motivator as an example for something drastic with this therapy. I would remind you that ELEVIDYS has one of the most impressive safety profiles in the context of AAV-mediated gene therapy that has ever existed. It is true that every AAV-mediated gene therapy comes with a risk of elevated liver enzymes. And in other cases, there have been significant consequences for that. They are rare. With respect to us, they are particularly rare. In fact, this one incident is unique, not only in its outcome, but even in the sort of the course of it. There's something very different about it. And it's in the context of AAV-mediated gene therapy. It's in the context of the understanding that there is always a risk of elevated liver enzymes in the vast majority of cases. And with this one case being the only exception, they respond very rapidly to a modest increase in steroids and come back down to baseline. So there is no reason to believe that a science-driven organization and science minded regulators would be considering anything other than the fact that they should be proud that they approve this brilliant therapy.

Thank you. One moment for our next question. Our next question comes from the line of Eliana Merle of UBS. Your line is now open.

Hey, guys. Thanks for taking the question. Just in terms of a potential label update for ELEVIDYS, can you talk us through your latest expectations there for any potential update or conversations with the FDA after the patient death? I guess, when could we potentially hear about a label update and what your expectations are for what this could look like? And then just in terms of the commercial uptake, you mentioned that there were some patients who were scheduled for late March that delayed their dosing. What proportion of those have now rescheduled their infusions? Thanks.

So let me answer the second question first by simply telling you I don't have the data available to me right now. But it was really -- those were primarily a function of patients or they're physicians who saw the news of the event and needed information. And they're coming up to an infusion in a week. And so they had to either pause or more -- most likely in almost every case rescheduled immediately so they could get access to that information. As it relates to your first question, I will turn the call to Louise, who can provide an update on the label update.

Sure. In April, we submitted a labeling supplement. We already had one planned and anticipated. And so at that time, we also updated the label to include this patient death and the case of ALF. And so FDA confirmed receipt of that and set a target review date. So the target completion date will be no later than the fourth quarter this year for those label updates.

Thank you. One moment for our next question. Our next question comes from the line of Brian Abrahams of . Your line is now open.

Hi, good afternoon. Thanks for taking my question. Maybe shifting gears to limb-girdle. Following the pre-BLA meeting, have you had any additional meetings with the new FDA leadership on the limb-girdle programs and curious their updated feedback on the accelerated approval path for 2E. And then I guess on 2E, is the emerging data still expected to be disclosed publicly by the middle of 2025 or should we expect that that's going to be initially submitted to the agency? I didn't see anything in the press release or hear anything in your prepared remarks on data. Thanks.

Yeah. I'm going to turn this over to Louise, but let me briefly say the following regarding our interactions with OTP and the LGMD portfolio. So since the change in administration, we have had a number of discussions with OTP and interactions. Everything has remained on course. The approach that they had previously confirmed with us is the approach that they've taken today. So nothing has changed there, which is all very positive. And I would also say, I know there's a lot of concern over the fact that the FDA has gone through a lot of dislocation. I think there was an announcement of some 3,500 potential layoffs and that there may be as a result of that delays or slowing down or reviews. But I must give credit where credit is due. We have not yet seen that at all. with our colleagues over at OTP led by Dr. Verdon, Things seem to be quite on track. And certainly, the approach that they were historically taking is the approach they're taking today. But Louise, you're going to want to provide more color about that.

Sure. As we've seen over the past several weeks, we've seen consistent interactions with OTP as we've seen previously. We've had a number of interactions. So, on 9003, as noted, they confirmed the accelerated approval pathway is open just as early as last week, they accepted a rolling review for SRP-9003, so things continue to progress as planned. Also, as we announced the same review division cleared the IND for SRP-9005 for QC. So things are progressing as planned with the agency.

Thank you. One moment for our next question. Our next question comes from the line of Debjit of Guggenheim Securities. Your line is now open.

Hey, good afternoon and thanks for taking my questions. So a couple of questions. One on limb-girdle. Is there a threshold for protein expression that the OTP wants to see? And number two, could you sort of quantify the number of nonambulant boys who have been treated on the commercial ELEVIDYS product? Thank you.

On the second question, we're not providing that level of data, although I will tell you, we've obviously historically been dosing nonambulatory kids, we're continuing to dose nonambulatory kids, and we're getting start forms for nonambulatory kids. On the first question, I will turn that question over to Louise Rodino-Klapac.

Sure. And I think I forgot to answer the question on the previous time about -- we will have the emerging data in the first half of this year, which will go into the BLA, that will be expression of esophageal glycan proteins and safety. On the question around expression levels, as you know, from the 101 trial, we saw expression levels with both doses, both the low and high dose around the 50% mark. We know from preclinical data that much lower expression leads to functional benefit. So we anticipate the results that we see from EMERGENE will be consistent with that and will certainly lead to functional benefit and above any threshold of relevance.

And just to add to its first question around the number of non-ambulant patients, I think we have previously disclosed that it's well over 100 patients between the clinical and commercial settings. So we've had good experience there.

I think our enrollment forms, or start forms are something like 40% nonambulatory, 60% ambulatory.

Thank you. One moment for our next question. Our next question comes from the line of Salveen Richter of Goldman Sachs. Your line is now open.

Thank you. Good afternoon. Can you remind us as to the timelines for seeing data from your confirmatory studies across both the exon skipping franchise but also ELEVIDYS? Thank you.

The confirmatory trial for -- okay. I guess you mean the ENVISION trial. Louise, I'll turn this to you.

Sure. The last patient last visit for ENVISION is in 2027.

Thank you. One moment for our next question. Our next question comes from the line of Brian Skorney of Baird. Your line is now open.

Hey, good afternoon. Thanks for taking the questions. I guess just in regards to the changes at CBER and meetings with the FDA, you said that you're expecting a decision on labeling update to ELEVIDYS no later than the fourth quarter. I'm just wondering, is there any sort of formal meetings that are held with CBER along with that? Or is it just sort of an internal review until they make that decision? And then when we first heard about the patient death, I know there's a complicating factor with the reactivation of latent virus. So I was just wondering if the wound up being a biopsy and if you had anything informative on that front.

I'll answer the last part of it to make it easier on Louise. We don't have the autopsy results yet. We're waiting for them. We should get them in the next month or they may or may not be additionally informative. And as to the first of your questions, I'll turn this to Louise.

Regarding the label update, the FDA would just come back with any questions along the way if needed. And really, it's more of finalizing the label update, not necessarily that we're awaiting a decision on it. So they've already confirmed that they are in general agreement. So it's really just going through the process now.

Thank you. One moment for our next question. Our next question comes from the line of Michael Ulz of Morgan Stanley. Your line is now open.

Good afternoon and thanks for taking the question. Maybe just another one on ELEVIDYS trends and more recently, just curious if there's been a shift in the age of the patients being treated or in the ambulatory status of those patients being treated? Thanks.

Yeah. Thanks for your question. I think it's too early to know precisely what the trend is. What I can tell you, which is a little more anecdote than precise trending is that we are continuing to see both ambulatory and nonambulatory start forms coming in. So I don't know if we track this out two months, if that 40% will go down to 35%. But as it stands right now, we're seeing good uptake in both ambulatory and nonambulatory from a start form perspective. And I will say, let me forecast the future a bit, of course, the real issue is what happens when the information gets out to patients. And one of the things I want to remind us about is that there is no difference in any of the markers, any of the elevated liver enzyme markers, any of the bilirubin marker, there is no difference between ambulatory and nonambulatory, and for instance, risk of elevated liver enzymes or liver injury. So there really should be no reason if we educate properly why there would be a significant difference in start forms.

Thank you. One moment for our next question. Our next question comes from the line of Gil Blum of Needham & Company. Your line is now open.

Good afternoon, and thanks for taking our question. Maybe a different approach for kind of the same topic as it relates to the patients who kind of took a minute to think about whether to go on treatment post the event, was there any commonality across them, more ambulatory, nonambulatory or is just the timing thing? Thank you.

So, I'm sorry, timing. It's just a timing thing. They were in March and that was approximately in very end of February, early March was the announcement.

Thank you. One moment for our next question. Our next question comes from the line of Joe Schwartz of Leerink Partners. Your line is now open.

Thanks very much. We noticed the company recently hosted a meeting with PPMD after the patient death. I'm just wondering how impactful were these interactions? And I know that there's an upcoming annual conference in June, so I'm wondering what are the company -- what the company's plans now to interact with these organizations? And what do you think you need to emphasize with these families in order to underscore the positive risk benefit of ELEVIDYS?

Yeah. I mean I think that webinar was very meaningful, but it's not the end. I think we are committed to giving the broad community. Remember, there's some 10,000, 12,000, 13,000 Duchenne patients in the United States. And we need to get the information out to the broad community, so they can make intelligent decisions0020and evidence-based decisions with their physicians. At the same time, by the way, side now. We have to do the same thing with the physicians because they -- the physician is the ultimate guider for the decisions of the families. And the information that we have to get out to the world is both the safety profile of this therapy but also the efficacy profile of this therapy. We can't leave 1 behind because we can't make a good risk-benefit decision without it. And that's one of the things that we need to do. I think in part because of the amount of data we have and the fact that, that data has come in over a significant period of time, I sometimes worry that people aren't seeing all of the information and all of the evidence of the benefits of ELEVIDYS together because it's a really impressive package that, I think, to any rational physician will indicate that this therapy is a significant disease modifier that has the potential for stopping this ferocious muscle damage or at least a significant amount of the muscle damage and then slowing or fully arresting the decline that is inevitable with Duchenne for anyone that doesn't get treatment. So we just need to get that -- we need to get all of that out. I think 1 of the things we focused on very significantly in that recent webinar, of course, was sharing the most recent information about the safety event. And I think that was extraordinarily appropriate. On a go-forward basis, we need to talk about all of it in the context of all the safety and the efficacy available to us, and we are committed to doing that.

Thank you. One moment for our next question. Our next question comes from the line of Yanan Zhu of Wells Fargo. Your line is now open.

Great. Thanks for taking our questions. Great. First, I would like to ask for a clarification question regarding the uptick that you anticipate in the summertime for patient demand based on some leading indicators you're seeing. The question is, there must also be a leading indicator of some decline, and that's because you're lowering guidance. How do we reconcile a decline and also an uptick? Could we assume that you're seeing a pickup in pace of the starting -- patient's start forms coming in towards the more recent period. And then sorry about that long-winded question, a follow-up in much straightforward question about peak sales estimate, do you have any comment on whether you are changing your guidance on the peak sales and the time to reach that peak? Thank you.

So on your first question, both are great questions, let me answer them. On your first question, the lowering of guidance is multifactorial, as I've mentioned, but there's no doubt that as a result of the safety events and the need to get more information out to patients, we saw a drop off initially. Now when we say we're already seeing an uptick, and we're going to see a more significant uptick in the summer, that's because that's what we're seeing. So someone asked earlier why are you assuming a flat to down second quarter? It's because this is a long cycle time therapy and a lot of people need more information to contextualize things and that cost it as we're getting that information out. We're already seeing that uptick in start forms. And then when we talk to the families but also sites, it's quite clear that there is a belief among everyone that they're going to see a very significant uptick in the summertime when you get past the school year in some of those issues. So I hope that answers your question. So the second issue was on peak year sales. So we're not prepared yet to talk about peak year sales, but I want to put the concept of peak your sales in the context of a onetime therapy. Normally, the peak year sales is an indication of the ultimate opportunity of the therapy. And onetime therapy is different. It's an under -- it's essentially area under the curve analysis. So how long it takes to get to peak and will change the actual peak, but the same opportunity exists essentially under the curve. And there is no reason to believe that the opportunity has become any less diminished now even though we are reducing our guidance for this year because of the -- some of it being cycle time, some of it being some educational needs, some of it being some imbalances in sites that we need to address. The ultimate opportunity remains the same. We are correct in our epidemiology. We know the patient population and the size of it. There's no reason to believe there's any smaller population this is amenable to. And so the same opportunity exists. What that -- what a delay in uptake implied by the $500 million delta in our guidance implies. And what that means for peak year sales is something we'll have to calculate and then look at it and talk later, maybe later this year, maybe early next year, something along those lines. But the opportunity remains the same. The same ultimate NPV should exist in either case.

Thank you. One moment for our next question. And our next question comes from the line of Kostas Biliouris of BMO Capital Markets. Your line is now open.

Hi, everyone. Thanks for taking our question. To the extent you can comment on that, can you talk a little bit about the decline of ELEVIDYS ex-US sales quarter-over-quarter? And to what extent those three headwinds you mentioned for US may also apply ex US at least anecdotally? Thank you.

Well, I'm hesitant to discuss our partners' sales and I would allow our partner to comment on it. I'd be surprised if it related to any of the cycle time issues or even the safety event or the like that we have in the United States, but I would have to beg off that question and ask you to ask Roche about that.

Thank you. One moment for our next question. And our next question comes from the line of Anupam Rama of JPMorgan. Your line is now open. Anupam, your line is now open.

Sorry about that. Thank so much for taking the question, guys. Just a quick clarification question. Louise, I think you said in April, you submitted a labeling update and had some of the patient -- what you knew about the patient death information. But what else was included within that labeling update, did it include the two-year EMBART safety update? Did it include any real-world safety updates? What all was included in that?

Louise?

This is just updating the safety information. So this is about including the information around this particular case previously. It was just around ALI. So now this included ALF and the case. So that was the breadth of the uptake.

Thank you. One moment for our next question. Our next question comes from the line of Biren Amin of Piper Sandler. Your line is now open.

Yeah. Hi, guys. Thanks for taking my question. At the end of February, the company mentioned on its year-end call that there was ample site capacity for both infusion and follow-up. So I just want to kind of ask how site capacity changed over the last two months? Or what -- or do you think it was more driven by patients being more cautious and need more handling before they sign up for administration? And I think on that last point, is there anything the company can do to provide risk mitigation strategies to physicians, given I think the community is looking for clarity that would derisk future events?

Let me say a couple of things. One, we do in aggregate, have good site capacity. The issue that we have, as I mentioned, in my opening remarks, is a bit of an imbalance where if you just focus on the top sites, by the way, the top sites are responsible for about 60% of our current sales. They've been so sufficiently successful and enthusiastic along with their patients that they are often booked all the way out. Some are booked by a year or more out. So it's not simply about capacity because we can't -- let's be clear. You can't redirect a start form that's sitting at site X that's got a one-year delay to site Y over in filling the blank, Indiana, it's just sitting there. So we've got to make all of the sites more productive, which is on us. We've got to get out and educate, work with them and the like. And so that's the issue. Do I think that there was some drop-off in March from families that you would say handholding in my view, would be needed more information and the like? Absolutely, I think that absolutely did happen. And I think we're doing the work there, and I think it works very well because the data and evidence is very supportive of the risk/benefit of this therapy. And then on risk mitigation, I would just say we have a wealth of risk mitigation in this very laudable safety profile therapy, may be very clear. Like, we proactively placed into the label. A significant amount of monitoring, which physicians follow. We have these concepts called SAREPTA EXCHANGE, which is really one of a kind, where physicians in any site can get access to some of the world's leaders nearly on a real-time…

Thank you. One moment for our next question. Our next question comes from the line of David Hoang of Deutsche Bank. Your line is now open.

Hi, guys. Thanks for taking the questions. So I just wanted to ask one on any anecdotal experience broadly for patients that have been dosed to date with commercial ELEVIDYS, what you hear from the docs and families -- match up with what you know from EMBARK in the clinical trial experience? And then just with the PMOs, how should we think about cannibalization of the products, given how the ELEVIDYS commercial uptake curve may be changing? Thanks a lot.

Yeah. On the first one, you referenced it is anecdotal. So, take that with a grain of salt. It's anecdotal, unfortunately, we don't get approvals on anecdote, we get approval on evidence. The anecdotes amaze very clear. I mean one of the things that during this very difficult and chaotic time that's existing in the broader market in biotech specifically and certainly at Sarepta specifically, it is comfort to me when I get videos from families. And we've got -- we're seeing a lot of extraordinary stories from families, kids that are riding bikes, kids are running up and down at an age when they ought to be in a powered wheelchair, kids outpacing their father who's trying to catch them in the woods. There's one particular individual video I watch often. So what that doesn't mean much. It's only anecdote, but we get a lot of a lot of great anecdote. And I think when families begin -- to get the opportunity to talk to other families and see the experience they're having not only the experience of getting -- going through the process to get infused in the infusion process and the like, but then seeing what it may mean to them and their life going forward. I think it's going to be very, very motivating for families who as yet, maybe don't have a start form.

Thank you. One moment for our next question.

One other thing I should say, I think there are some interesting information on that in our website, I believe, yeah.

Thank you. And our next question comes from the line of Mitchell Kapoor of H.C. Wainwright & Co. Your line is now open.

Good afternoon. This is Dan on for Mitchell. Thanks for taking our questions. So we were wondering with the FDA changes specifically Dr. Vinay Prasad, now homing fever, and given this expectation of having more data for approvals, how much your approach to clinical trial designs change? And do you see any impact to your development timeline? Thank you.

Let me speak to what we know today. Of course, that appointment occurred only today. So what I can tell you is that subsequent to the change of Commissioner Makary and then the departure of Dr. Marks, we've had a significant number of interactions with our primary reviewer on the biologics side, which is OTP at CBER, and we have seen so far no changes, in the approach they're taking. In fact, Dr. Verdun appears to be quite innovative in her goal of moving therapies along and relying upon modern tools for drug development. I would also note that Dr. Makary hasn't made many public statements. So it's difficult to deduce precisely what his views are on things. But he did say in a few recent interviews that he does believe, for instance, with respect to rare disease that relying upon biomarkers and plausible mechanisms of action makes sense. So on whole, I'm going to remain confident that the FDA is going to be a science-based evidence-based organization. And hopefully, if the interactions that we've had in the last few months or any indication, are going to continue the march towards ensuring that regulatory science can keep pace with actual science and we can begin to really accelerate. To that very end, one of the things that we speak of all of the time is the cost of healthcare in the United States. And we talk about a lot of concepts in there. And truthfully, we talk about discounts and rebates and outcome-based agreements and all of those things are interesting and probably worth discussing. But there is one thing more than anything else that from a drug perspective can reduce the ultimate cost of healthcare in the United States. And that's the ability to make our therapies get them through the regulatory process with less unnecessary burden, get it stripping down to those things that truly add insight on safety and efficacy, collapsing timelines and reducing the cost and risk of them. If you do that, you can start getting therapies out in the United States and then around the world, that will be far less expensive, but equally efficacious and beneficial to patients. So that's the direction in which I see the FDA historically heading, and I'm confident that the FDA will see that, that's a brilliant answer for society.

Thank you. One moment for our next question. Our next question comes from the line of Kristen Kluska of Cantor Fitzgerald. Your line is now open.

Hi, this is Rick Miller on for Kristen. Thanks for taking our question. Can you just talk about some of the administrative delays in infusion. I think you mentioned a specific Medi-Cal delay that you said was resolved. Was there something specific driving this? Any information requests from organization or anything like that you could speak about? Thank you.

Yeah. That very specific issue, which is the administrative delays, specifically in the first quarter, that was really just an administrative issue. It was an administrative issue between the sites of care in Los Angeles County and Medi-Cal, let me give you more detail than you want. So when you -- normally the thing that decides whether a patient gets dosed is a preauthorization. So you get a pre-op. This is not about that. So this is not about patients ultimately getting dosed. This wasn't a fight over access or anything along those lines. This is all about families that already had scheduled infusions and had already gotten prior offs from the payers. So it's not about access or anything. It's a really specific administrative issue, which is given the cost of these onetime therapies, sites of care, often, very, very often, maybe almost universally are asking of the payers that they signed single case agreements for that particular infusion, which is sort of a belt and suspension concept of saying, I know I'm going to get reimbursed if I do this. And there was this hiccup in the first quarter where there was a delay in those single-case agreements. And that caused -- people just couldn't get dosed. They all got rescheduled by the way. They all just -- they all got rescheduled, but outside of the first quarter into the second quarter. And then that issue got resolved between the payers and the state. Yeah, go ahead.

And it doesn’t -- it's a good question. It does really underscore the dynamics of a onetime therapy that if you compare it to our PMO experience, delays in, let's say, 15 patients in the gene therapy world to get the same kind of financial impact, you'd have to have the delay of 150. It's a tenfold impact for a onetime gene therapy versus a chronic therapy. So small swings matter, but that works both on the upside and the downside.

Yeah. I do want to make sure we're absolutely clear that was purely an administrative issue. It's not an issue we've seen before. We understand the single case agreement concept well. One of the things you need to know, though, is that we don't participate in the single case agreement. That is between the site and the payer itself. But it's not an access issue. It's an administration issue.

Thank you. One moment for our next question. Our next question comes from the line of Sami Corwin of William Blair. Your line is now open.

Hi, this is Caleb on for Sami Corwin. Thanks for taking our question. So in regards to patient education, are there particular -- any particular data sets the families want to see before gaining more -- to gain a little bit more confidence on ELEVIDYS following the safety event? I know you guys presented a lot of safety data thus far. But do you -- are you hearing anything on family want to see more data in possibly the older nonambulatory patients to get more confidence there for them? Thanks.

Well, I'm going to speculate a bit on. I mean I think the things that are important to families broadly. So specifically about the safety event, they want to hear about it, what was it exactly and put it in context. One of the things that family sometimes didn't know is like is this one of five. Like, if you dose seven kids, you dose 10 kids. No, we've dosed well over 800 kids. That data points probably becoming stale. We've just over 800 kids. So sort of contextualizing it and what that was about and what that meant. The second piece of information, I think, that's really important to families to contextualize is, do you see anything different here? Is there something about being ambulatory versus nonambulatory that plays a role? And the answer to that is no. We looked at all the signals, there is no reason to believe that at all. All of the liver enzyme issues are the same across ambulatory or nonambulatory, [believe it is] (ph) the same. But then I think the next big thing that families need to understand is the efficacy. They really need to see the efficacy. And that's a lot. There's a lot to talk about there, right? Because we have a lot of data that supports how beneficial this therapy is. All of the data that supported the original approval, the totality of the evidence was lights out supportive of it. And then the data that came out a year later from the original study was just, again, completely lights out. On the two years kids that are on the therapy for two years were significantly better than natural industry on every single measure. Same was true for the older kids, even at one year. The trajectory analysis was…

And you can see some of the tools that we're offering to patients now on elevidys.com. You can go in and see the various videos, educational tools, including the tools, how we educate them across treatment journey of what to expect and how to -- what to expect and how to manage that treatment journey.

Thank you. One moment for our next question. Our next question comes from the line of Uy Ear of Mizuho. Your line is now open.

Hi, guys. This is Leo on for Uy. Thanks for taking our question. Is there a reason that patients appear to be flocking towards the leading centers that have full capacity? Do you expect any of these leading sites to increase their site capacity? And to what extent does your updated guidance account for increased number of infusions at the secondary sites that you're not targeting? Thanks.

So I think it's not at all a surprise that there are so many start forms at the top sites. They are also the top sites. They are -- these are the world-leading Duchenne sites, like you can then, I don't want to start naming them because I might forget one, and then I'll be accidentally insulting somebody. But these are the world's leaders in the treatment of Duchenne muscular dystrophy. These are the most renowned sites around the country and frankly, around the world. So it should be of no surprise that a family when they hear about this horrible diagnosis would want to go to one of those sites potentially. And that's why it's there. So -- and I'm sorry, what was the other part of the question, I’m missing it? But -- anyways, that's the reason that there was this imbalance. And then I guess on our forward -- yes, we're assuming that we're going to get a lot more capacity. We're going to exploit a lot of the capacity in the secondary sites going forward that's going to help us not only hopefully even get to or even exceed our guidance over the course of the year. And one thing I should remind everybody, all of the sites that are permitted to infuse Sarepta -- I mean ELEVIDYS, are well-trained and validated sites, and they are themselves all brilliant sites. So there is no reason to believe you're going to get a different quality of care in one of these sites, they're going to all do a great job for you, which we need to focus on.

Thank you. One moment for our next question. Our next question comes from the line of Andreas Argyrides of Oppenheimer & Co. Your line is now open.

Hey, good afternoon. Thanks for taking our question. With shares at current levels, how are you guys thinking about the opportunity for implementing the approved buyback? Thanks.

I'll turn this to Ian.

As I said in our prepared remarks, obviously, the stock does not reflect, our guidance still remains $2.3 billion to $2.6 billion. The stock is trading at levels that aren’t even recognizing that. And so we certainly think that it's undervalued. Louise just outlined multiple data readouts from our pipeline also to continue to drive growth. So we have to balance, obviously, both our investment in R&D and then our investment in a potential allocation strategy, and that's what we mean to going forward. Obviously, we're not going to be too direct about how much we're doing or the like, but it's certainly a consideration that we're looking at.

Thank you. One moment for our next question. Our next question comes from the line of Gena Wang of Barclays. Your line is now open.

Hi, this is Tony on for Gena. Thanks for taking our question. So some of our own channel checks have suggested that there are some payers deciding not to cover ELEVIDYS. We were wondering if you could provide any additional color on your experience with coverage so far? And then second question, when could we potentially expect an update regarding the halt on studies in the EU?

Sure. So, first on the first one, just to be clear, I can use the PMOs is the answer. There are always some subset of payers that resist access and require more work. And just one of the reasons that cycle times sometimes get extended because you have to go through appeals processes and the like. So there's nothing different about ELEVIDYS and the PMO with the exception that probably on a whole the ELEVIDYS policies are better. So ELEVIDYS policies are a lot better part because we have a traditional approval for a significant percentage of that approval and in part because we have so much data that supports it. What I will say and ultimately, regardless of policy, the difference is in policies. There's policies to label. There's a lot of them with ELEVIDYS, and I'm really proud of that. There are some policies that try to put some restrictions in and then there are some policies that are very restrictive. The ultimate answer is an issue for us, but not actually ultimately for revenue or for you because we'll get the kids on the therapy in any of the scenarios. Some will take a little longer than others. And that's why I can tell you that with respect to the PMOs, we're well over 90% success rate in getting those kids on therapy even when a payer might try to take us to an appeal or something. With ELEVIDYS, our current success rate stands at 100%. Suggesting that five years from now, we'll still be at exactly 100%, but there's no reason to believe we will be worse than our PMOs and our PMOs are doing great. So we feel very good about it. And then as it relates to the halt, Louise, do you want to chat about that?

Sure. The EU process requires a need for a substantial amendment. That typical review time is around 95 days. So that approval to restart is expected around the end of summer. But just to remind you, we are still enrolling outside of the EU as well. So the trial continues to enroll and we're on track.

Thank you. I'm showing no further questions at this time. I would now like to turn it back to Doug Ingram for closing remarks.

All right. Well, thank you all for joining us this evening. I will tell you, it's not enjoyable to bring guidance down. It's the first time frankly, in my career when I've done it, and I don't intend to do it again. But I do think it was the prudent thing for us to do as we're working through some of these issues, and I feel very confident the teams prepared to work through the issues, and we will achieve our guidance. I mean I'm just talking extemporaneously now. I came to -- it's more than revenue to me, okay? It's not about revenue. That's not what upsets me. But revenue is the scorecard for what upsets me. The fact is that I came to Sarepta, just about eight years ago with the belief that along with some other really dedicated people, we might actually be able to intervene and change the course of a disease that's just horrific for families. And I feel particularly strong about that right now because I literally had to go to a funeral yesterday for a young man who died of Duchenne muscular dystrophy. It's a disease that takes often brilliant human beings and steals them from their family little bits by bit. And for almost all of history, it was nothing but nihilism, it was nothing but a physician that got the tell a diagnosis, there's nothing we can do for this boy, so go home and love him and watch him, grow and then die in front of you. And the thought that we might be able to do something about that was extraordinarily motivated. It's why I came here and why me and 15 other people at Sarepta fight every day for the families that we serve. This is not just a revenue issue for us. This is who we are. And so the very idea that we've gotten to where we've gotten is impressive, okay? We have four approved therapies. We have three PMOs doing a lot of good for kids and we have a gene therapy that's the best gene therapy and the most successful gene therapy ever launched. But it's not good enough. I want to be very clear. That's not good enough, all right? Because every day when a kid who could have gotten infused, doesn't because of an administrative issue or because of a misinformation issue because we didn't get out to the site. That's a day we failed in our mission, and we're not going to fail in our mission. So I look forward to updating you over the course of this year, and we've got a lot of other things going on at Sarepta that we're excited to talk to you about later this year. And I thank you all for your support and for your great questions this evening.

Thank you for your participation in today's conference. This does conclude the program. You may now disconnect.