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Evercore ISI 8th Annual HealthCONx Conference

Dec 3, 2025

Moderator

Oh, we have a minute. Are we live? Okay, fantastic. Thank you, guys, for joining. Super excited to have Dietmar join us from Gilead. I know we've spent time at your prior company as well. So how's the transition been, and how are things going on the West Coast?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Transition has been. First of all, thanks for having me. Transition has been great. I'm with Gilead since a year. I've always been excited about the science and the people and the impact that Gilead has. And what I found is exactly in line with that. So I'm really excited. It has been going well. We've had good data during the year, obviously. We have different launches going on. We have the portfolio focused on virology, oncology, and inflame. So it's been a really good year.

Moderator

Fantastic. We're going to focus this conversation today more so on R&D. I know we had Andy with us earlier as well. I was hoping Jacquie would join us, but Jacquie's staying there. But maybe, so I'll stick to the R&D topics. But because everyone cares so much on these two, I guess my only question to you from an R&D perspective is, how have you looked at some of the, when you got in and you saw some of the nodule data and perhaps even in talking to clinicians at some of these conferences, how have those conversations been? And how important was it that you moved to IM?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, so just stepping back for a second, right, the nodules that you see have not been a problem at all on the clinical side. When you look at the Purpose 1 and Purpose 2 study, people have been really content with the therapy. We have basically 96% of people who were on the study who said, "I want to stay on, yes, two goes." So this has not been clinically any issue. And you have to see that the nodules are really part of the mechanism of action. You basically get a depot, a subcutaneous depot. The move to intramuscular is another option that gives us another option for longer duration therapies. It also gives us an option to then go to once-every-year therapy.

That's the ongoing study that we have, which we call Purpose 365, which will get us to a prevention option for HIV with a once-every-year intramuscular injection. And that's important for, first of all, further extending the intervals to basically a vaccine-like approach. We're always saying it's not a vaccine. Really important in the.

Moderator

I heard these days it's very important.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

It's really important in the environment. But having a once-per-year option is really important for us. And the intramuscular helps with that, basically. Smaller volume intramuscular.

Moderator

Got it. So the one thing I always think about is, the nodule still happens. It's just deeper, or no?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

You cannot feel a nodule with the intramuscular because you are deeper, but there still is a depot.

Moderator

Okay, got it. So there still is a depot. It's just not as big. Okay, got it. Also, would you remind us, the intramuscular is only being studied for your annual shot or also for the every six months?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

So the intramuscular could be applied to different timing. So it could also be applied to the once-every-six-month.

Moderator

Okay. Is that being pursued right now, or is that sort of, you'll think about it depending on how the data comes in?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

We'll think about it depending on how the data comes in.

Moderator

Okay, got it, and from a patient feedback perspective, maybe clinician feedback perspective, like the early experience on nodules and there's an aesthetic side to it and some pain side to it, what has that been? Is it rate limiting? People are getting their first shots right now. Are they like, "Oh, I don't want to do that again"? Or is it sort of like, "I can live through it"?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

We did not hear that at all. The important piece is, obviously, this is a complex launch, obviously. We're in a situation where a lot of the prevention is also oral. Now you're talking about an injectable, which is a bit of a paradigm shift. The injectable has real benefits, for example, from a compliance perspective, because the shot is in once every six months, and people are protected for that six-month period. There's no question of taking a daily pill, no question of keeping the medications with you. Compliance is better with that, and that's one of the key benefits. We are really supporting that launch with a lot of information that we provide to people. One important piece is, how do you inject? For example, when you cool the injection site, then the pain is not a big issue.

The nodules form in the beginning, but then they go down over time, for example, and we have not heard any major issues around that.

Moderator

Okay. So it's manageable is what it sounds like.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

It's going well. Yeah, it's manageable.

Moderator

Okay. The other one is, Dietmar, as you think about from a compliance perspective based on your conversations with clinicians, how are you feeling? We had GSK management earlier this morning, and I was asking them their broader experience on long-acting on treatment. And they said, "You know what? We're surprised by the durability we're seeing on patients staying on." Because there's always a concern. They take one or two shots, and they're done. How are you thinking about that from a compliance perspective?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

So there's two aspects. One is comparing the orals or the less frequent versus the every six months. And they're clearly compliance with the once-every-six-month is not an issue because it's once and done.

Moderator

I mean, more like duration of therapy.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

But you're talking more about people coming back and then getting the treatment. And the main experience that we have at this point is from the clinical trials, where more than 95% or 96%, to be exact, of people decided, "I want to stay on Sunlenca because I do see that benefit of the once-every-six-month, and I want to do that for a longer period of time." Obviously, we are just getting into that phase where we get the retreatment. The launch was starting in June. So we're now getting into the phase where those people come back and then ask for the next therapy. So we'll get more experience with that over time. But I think that everything that we've seen so far indicates real positive feedback with the therapy.

Moderator

Okay, great. Excellent. So maybe we can start to move on. I want to start with a drug in your phase I, which I don't know how many questions you get on, but I'm just particularly focused on it because I sometimes wonder if this could form the basis of sort of like a Biktarvy replacement, if I may. Am I over-indexing on GS-3242, the new integrase, and if that could be the basis for a new lifecycle management for the franchise as well?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

So we've just communicated GS-3242, as you say, is an integrase inhibitor with a longer half-life. And we had several of those. We have several of those in our portfolio. We've just communicated that we've prioritized 3242 versus another very similar molecule, GS-1219, which shows you the depth of the portfolio. GS-3242 is a basis for some longer-acting treatment. So we're not thinking about this in terms of Biktarvy. Biktarvy, at this point in time, is a really important molecule for us. It's a daily oral for therapy. It's the standard of care that people, for example, with newly diagnosed disease get. They can get it at the first time immediately when they come into the physician's practice. We've got really good efficacy. We've got absolutely no safety issues. So that's our standard of care.

Over the longer term, if you get with, for example, a molecule like GS-3242 into longer treatment intervals, how this plays out and how this is segmented, we'll have to talk about that. And GS-3242 in itself is an integrase inhibitor. So you need a combination as well for these types of therapies.

Moderator

Sure. So I guess there's several follow-ups to that. First is, you had two weekly integrases. It was GS-3242, and there was a GS-1219. The GS-1219 was terminated. I think the clinical trial says only four patients were recruited. Could you remind us what happened there?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, no, we always said we have different molecules that we're exploring, multiple shots on goal. And then we will look at early parameters in order to select the one that we feel is the best one. And that's in these early stages based on PK, based on early tolerability data, also based on preclinical data. And that's where we saw some benefits for 3242 over 1219. So it's really a portfolio prioritization.

Moderator

It's portfolio. It was not like there was some CD4 drop problem or anything.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Oh, no, not at all. Not at all.

Moderator

No safety problem. The other one was, I think back in June, you guys had a clinical hold on a—I believe that was a long-acting capsid is where the hold was. Is that right?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

That was a combination therapy. That was the Purpose 1 and Purpose 2 study, which is a combination, again, of a long-acting. It was actually the wholly owned once-weekly option. And it was an integrase inhibitor, an INSTI, and a lenacapavir prodrug. And we did see that drop in CD4 positive T cells. We're currently in the phase where we try and understand the data around that. When you look at the two classes, the integrase inhibitors and the capsid inhibitors, lenacapavir and the broader class of the INSTIs, this is not a finding that's broadly linked to these drug classes. At this point in time, our main hypothesis is, with these prodrugs, you do get metabolites.

And we think it's most likely linked to one of the metabolites that you get when the prodrug is cleaved and the metabolite per se is circulating and that it's a metabolite-associated effect. We did not see anything like that with the original Lenacapavir. We did not see anything with the original INSTI, the 1720.

Moderator

Right. Makes sense. So both the molecules are on clinical hold then?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

So the combination is on clinical hold. And then as long as we need to really understand which molecule is it linked to and what exactly is the mechanism, until we have that, we're not moving these molecules forward.

Moderator

I remember when Lenacapavir got approved in PrEP, one of the things I was very focused on was, did this whole show up in some shape or form in the FDA review documents, and it totally didn't, so is the lenacapavir prodrug, if you want to do a monotherapy trial on that, that's doable?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

We have several lenacapavir prodrugs in our portfolio.

Moderator

Oh, I see.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

So what we're talking about is a very specific combination of one INSTI and one Lenacapavir prodrug. We have other INSTIs in our portfolio, and we have other Len prodrugs in our portfolio. So at this point in time, we're taking these other molecules forward while we try to understand what happened in that specific combination.

Moderator

Okay, got it. Got it. And okay. And maybe just remind me, that INSTI that was in this trial that was on hold, GS-1720, that was also weekly integrase just like GS-3242, which is also weekly integrase.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, that's a weekly. 3242, we need to see about the different approaches where we want to take it because the PK is longer for 3242. But again, it goes back to this fact that we have a variety of these molecules with different PK, different half-lives that we can take into different settings. 1720, 4182, that combination we're talking about was specifically our wholly owned once-weekly combination. Remember, we have a once-weekly combination that is coming. That's the Islatravir-Lenacapavir combination that we're doing together with Merck. Those are ongoing phase III studies that we'll read out during the coming year. So we have already a combination that we're moving forward with these phase III trials in the once-weekly setting.

Moderator

Or treatment setting.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

In the once-weekly treatment setting, but of course, we want our wholly owned combination, and that's where with the ongoing work on GS-1720, GS-4182, we've always said that will lead to a three- to six-quarter delay for our wholly owned, but we are continuing to work on a wholly owned combination as well.

Moderator

Got it. Okay, that makes sense. So I just want to make sure for everyone listening in, you have Artistry trials with integrase plus lenacapavir daily treatment.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Exactly.

Moderator

Then you have with Merck the weekly treatment, also all oral. And then you also had a weekly all oral of your own, which went into clinical hold. So that's three to six quarters behind. We'll see when that comes back. But for market positioning, you'll have a daily fully owned and a weekly partially owned. That's sort of like the near term. But the commonality in both those daily and weekly is you're dropping the nukes. How dangerous is that in terms of resistance profile?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, the resistance is a really important question. When you look at the different drug classes in HIV, you had the protease inhibitors, which is an old class. Then you got the reverse transcriptase inhibitors, which is where the nukes are, the NRTI or NNRTIs. Now you got the capsid inhibitors like Lenacapavir. What we do with BIC-Len is we combine two of the most active drug classes. We have an integrase transfer inhibitor and INSTI plus then a capsid inhibitor. Both of those individually show basically very limited resistance formation. We did publish on resistance data for Bictegravir, which is the component in BIC-Len, and Lenacapavir at the EACS meeting in Paris earlier this year. And when you look at resistance formation with the INSTI, it's very low. And you don't see clinically meaningful resistance with that. With Lenacapavir, again, you see very limited formation of resistance.

There's also no cross-resistance. So at this point in time, we're very encouraged by what we've seen in the clinical trials. We've not seen any resistance formation. Obviously, we're going to watch that as we go to a larger patient population. But we don't think at this point that there's any reason to believe that there would be resistance.

Moderator

Because we've seen one experience with your competitor. They tried a two-drug regimen. They dropped one nuke, only kept one nuke and one integrase. That integrase is nearly identical to bictegravir, and they did see, so as much as the primary endpoint looks amazing, they did see resistance profile emerge over time, so I just wonder.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

So we'll watch that very closely. But at this point in time, we haven't seen anything. Plus then what the competitor did, they did not have the combination with Lenacapavir. And Lenacapavir as a new mechanism capsid inhibitor, there's really no cross-resistance between the two. There's no cross-resistance formation as well. So we have not seen any concerning data at this point.

Moderator

Got it. So I was going through the phase II data, and I noticed there was an N74T pop-up, and that conferred resistance in phase II. And I was like, oh, so this could happen in phase III, or is that not a common enough mutation that you wouldn't see necessarily?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

That was a single case in the phase II, and we also had the phase III studies. We didn't see that again. That N74T is when the capsid forms; it's actually a capsid polymorphism. It's a really weak resistance that emerges with N74T. There's no circulating N74T mutations or anything, so we've not seen that as a pattern. We've not seen other cases of that. It's really interesting when you look at the Artistry studies, so again, BIC-Len, this combination is in two phase III studies at this point, Artistry one and Artistry two. Artistry one has read out, as you said, and Artistry one is a study in people who are currently on complex regimens. That is about 6%-8% of the HIV population. These are people who've been on therapy for decades, so they've cycled through all these therapies, and they have actually accumulated resistance.

In the Artistry-1 study, more than 80% of patients in Artistry-1 had a type of resistance either to the NRTI or to any of the other drugs, and these people were very effectively treated with BIC-Len, so that's another argument that basically shows you, even in people who have pre-existing resistance, BIC-Len is a highly active regimen that's effectively treating those people, and that is, I think, a real benefit. People on complex regimens are on regimens with up to 11 or more drugs at this point in time, and they have to take them at specific times of the day, and some of them have to refrigerate it, others not.

And for them, going on to this one pill a day, very simple, is a real advantage for them as long as we really cover those resistance mutations as well, which we do according to the study data.

Moderator

So the Artistry-2 trial, is that a naive setting?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

The Artistry-2 trial is in the switch setting.

Moderator

It's in the switch setting.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

It's basically taking people who are switching from effective therapies, want to go on to another therapy. But they're not switching from the highly complex regimens. They could actually switch from any type of therapy.

Moderator

Can they switch from Biktarvy?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

They can also switch from Biktarvy.

Moderator

The first trial was from complex, and the second one is from anything.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Anything. Exactly. And the second trial is reading out in the near future. And once we have these two studies, then we can take BIC-Len forward.

Moderator

Got it. I guess why not run a trial in naive setting then? If there's so much confidence in this, why not just go after the Biktarvy market?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, we could theoretically do that. But when you look at the strategy that we have, Biktarvy is such a strong standard of care at this point in time. Efficacy, safety, immediately usable as patients are newly diagnosed, no resistance formation. So we believe Biktarvy is going to remain standard of care in the naive population. And another daily oral doesn't really provide a major benefit versus Biktarvy. So what we've been focusing on in the naive population is longer duration intervals. That's where we're thinking about, can we take a weekly regimen, a monthly regimen, other longer duration regimens into the naive population with our studies?

Moderator

Okay, so I'm just putting your HIV strategy in perspective then. Integrase plus lenacapavir daily being positioned for switch setting.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Being positioned.

Moderator

Integrase plus Len-like drug on a weekly basis oral for naive setting. That will be the Biktarvy replacement.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, that would be. I still believe that Biktarvy, because it's so easy and such a well-established standard of care, will remain the standard of care, but we do want to provide more options. A lot of it is really about optionality, getting to people really satisfying their needs that they have, and you see that, for example, we're also developing a once-every-six-month injectable regimen for therapy, so people want different types of therapies, and that's where these options come in.

Moderator

Got it. I realize this is a bit more of a commercial question, so it may not be fair. But just to frame it for you, I think a lot of times investors are saying there's a Biktarvy business that's very large. A portion of that is naive. Maybe it's a substantial portion. And then a smaller portion is switch. And people just want to see what are the new drugs that allow this franchise to just keep going. So in that switch setting, how meaningful is that of the total Biktarvy? Would you know or you wouldn't know that?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Oh, I don't know the exact percentages there. But you're absolutely right that we want the initial therapy, the naive setting. Absolutely, with Biktarvy, we have that. And we also want to provide options for switch. Some people want to go from a three-drug regimen, which Biktarvy is, for example, to a two-drug regimen. That's where BIC-Len comes in. For example, in Europe, for many people, that's a key question. And we want to provide that option. But we also want to make sure we have options for weekly, for monthly, for longer duration.

Moderator

Great. Fantastic. I want to go to cell therapy, but last. I want to do a couple of parts of your pipeline, which perhaps there's curiosity around, but people don't really know where these programs are heading. Oral GLP-1, first of all. Can you remind us what type of scaffold is that? Is it Orforglipron, or is it the Pfizer scaffold or the Lilly scaffold?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

We have not communicated that. It's coming out of our chemistry, but we've not talked about the scaffold yet.

Moderator

Got it. If it shows what you want it to remind me, how big is the trial? What's the trial? When is it due?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

It's currently in phase I. And just to remind everybody, this is not part of our main strategy at this point. This is coming out of really strong chemistry capabilities that we have at Gilead, where people came up with this molecule. And it's an oral, which we feel is interesting. We will evaluate kind of the phase I study. It's in dose escalation. We are also getting from the phase I study data on metabolism. Obviously, phase I study will not give us data on obesity, for example, just to be very clear. But we will get data and hopefully can communicate more around the plans for the molecule during the coming year.

Moderator

Got it. I guess if it shows what you want it to show and checks all the boxes, do you intend to find a partner for this? What's the strategy going to be? Because it doesn't look like this fits into the core Gilead R&D strategy.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, let's see the data first. We have the possibility, obviously, to take it forward on our own. But you're absolutely right. This is something where a partnership would also be helpful.

Moderator

Okay, got it. Okay, got it. And then, okay, so we will sort of revisit that. The other one that's also intriguing is the oral Entyvio, if I may, the oral alpha-4 beta-7. There's a phase II ongoing. Can you remind us when is that coming? And is that also something that fits into the core strategy, or is that also open for partnership?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, that fits into the core strategy. We've communicated for some time. We have these three areas we're focusing on: virology, where absolutely industry-leading, oncology, and then inflammation immunology. The oral alpha-4 beta-7 is part of that inflamm strategy, where the only marketed molecule in our inflamm portfolio at this point is Livdelzi in primary biliary cholangitis. And then we have an earlier portfolio. Currently, we have three molecules in inflamm in phase II. One of them is the oral alpha-4 beta-7. And then there's a broader portfolio in phase I and in research. So it's a real focus area for us, and it fits into our strategy. The alpha-4 beta-7, the oral alpha-4 beta-7 is in inflammatory bowel disease at this point in time in the Swift study. That study will give us data during the coming year. Obviously, Entyvio is a standard of care in inflammatory bowel disease.

A lot of people have tried to come up with an oral. There have been issues both from an efficacy and safety perspective. We've been encouraged by the data that we've seen so far in both of these areas. And then, of course, we have different options as the data come. If we see Entyvio-like activity, then an oral can have real advantages. And you can also think about taking it into different segments of that IBD market.

Moderator

Okay, got it, and in terms of sort of an efficacy threshold that you have in mind, do you have a certain number in mind? Does it need to match Entyvio necessarily for it to be a drug that moves forward?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, I mean, I don't have a clear threshold in mind. And as you know, the Entyvio data in different types of settings have also been different. So it really depends on what the exact data is. In our study, we're looking after 12 weeks, which is another factor. So the data will not be entirely comparable. But thinking about this, there's different possible outcomes. With a daily oral, you do get different PK. You do get different target coverage. So there is a possibility that you can see Entyvio-like or even better efficacy. That would then position us, for example, as an additional pillar in monotherapy. Combinability, safety profile will be really important. Could you also go for a combination with one or the other oral molecules that are out there to further increase efficacy and really break the current efficacy ceiling there that you see in IBD?

Or if you see Entyvio-like or maybe not entirely the same activity, you could still take it as a pre-biologic and take it into earlier stages of the disease. So it really depends on the data, on the strength of the data, what are we doing with that molecule specifically? We have different options there.

Moderator

Got it. Okay, great. Do you know, by any chance, what the AUC looks like and how that compares versus the AUC delivered by Entyvio?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

We have not spoken about that in detail. Obviously, what you see is a more steady coverage.

Moderator

Has the exposure response limitations of Entyvio? Are those loud and clear to the Gilead team as you were thinking through doses?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

We have really not spoken about that level of detail. Let's wait for the data. The clinical data is going to trump everything, and then you're going to see much more about that as well.

Moderator

Okay. If the data shows what you want it to show, this could be a broader development program within Gilead, or would you potentially look for the right combo partner for this? Because there's also a lot of combos in the works in the IBD space.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

This is the same as for the GLP. We have the possibility to take it forward on our own if we want to, just from an investment perspective, obviously. But we'll think about that really carefully because, as you know, in IBD, in inflammatory bowel disease, people are also thinking about combinations. We have different internal molecules that could be a combination partner. We've got the TPL2. We've got an FXR. But they're also really attractive.

Moderator

You said TPL2?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

TIPL2, TPL2.

Moderator

TPL2, and what's the second one, you said?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

And the second one is an FXR agonist. So those could be potential combination partners internally, but they're also really attractive external combination partners. So it's also an option that we could consider.

Moderator

Okay, so you look to maximize the value internally.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Exactly. We look at maximizing the value.

Moderator

Okay, fantastic. Okay. Any questions on anything we discussed so far? Okay, great. So maybe we can perhaps keep rolling here and transition to cell therapy. A couple of things here, if I may. Actually, just before that, there's an RA trial, 0511. I have no idea what that is. That's not an oral TNF, is it?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

No, it's not an oral TNF. No, exactly. We actually have two RA trials ongoing. One is with a PD-1 agonist, which I think is the one that you're talking about.

Moderator

Okay, got it. Okay, fantastic. Maybe transitioning quickly then to the cell therapy side. I want to come back to Arcelix in a fair amount of detail. But just ahead of that, at ASH, you're showing some data on a CD19, CD20 CAR-T. I don't think it's clear to folks, clear to investors, whether this is your follow-on to Yescarta and maybe even transition the whole franchise over, or is this more a sort of expand the use of how do you position that, first of all?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, so that's a next-generation approach. Yescarta, Tecartus, those are molecules that are focusing on CD19 as a target. And we've been for some time working on really thinking about if you target CD19 and CD20, can you improve efficacy, but also can you think about improving safety at the same time, improving benefit-risk, and potentially also taking this then to the outpatient setting. Those are some of the attributes that we would like to generate. So this is what we call a bicistronic CD19, CD20. So you've got different activating regions as well. And we can very carefully modulate that, so really to get to this better benefit-risk equation.

What that does then, it opens up a broader possibility, first of all, to, quite frankly, replace Yescarta and Tecartus with a next-generation treatment approach, but also to get into more broadly also inflammatory conditions, for example, classic immunologic disease or also neuroinflammatory conditions. So there are various opportunities.

Moderator

but price point would be so different for that immunology. I mean, you can't develop it for both.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, this is really early to talk about pricing. So I'm not going to do that. But you also need to think about what are the patient populations that you're taking into. For example, when you think about SLE, where we have some positive data, systemic lupus, these are people who have exhausted all other options to have a really large unmet medical need. So let's focus on the clinical benefit first, and then we'll talk about pricing. And I'm not the right person to talk about pricing anyways.

Moderator

Sure. Do you anticipate better safety on this as well?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yes, I think there's a possibility for that, and that's really based on the construct of the molecule, where we can, with the bicistronic construct, we can really dial what is the activity on the CD19 side and on the CD20 side. So how is actually the kinetics of the cells over time? So we feel there's a real potential for better safety as well.

Moderator

Anything in particular we should look out for at ASH for this molecule?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, I mean, the early data, obviously, what we want to demonstrate is good efficacy. Efficacy is always, because we see this really high efficacy with the current therapies, there's a ceiling effect. So I'm usually saying efficacy at least as good as what we see with the current molecules. Then, obviously, we want really good safety. And then this is all supported by the manufacturing capabilities that we have moving this forward.

Moderator

Okay, great. So last question on the Arcelix development effort. I guess the first question is, what's the most important next data set coming up for this?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, I mean, as you know, we have the Imagine-1 study going on. As you think about myeloma therapy, initially, we are taking this into fourth line plus. That's the Imagine-1 study. That's the next data that you're going to see. We also have a study ongoing in the second to fourth line setting. And then we are also working on getting this into the earlier line setting. These are discussions we currently have, so to really also get it into the first line setting. The most important next data set is actually what you're going to see at ASH, which is from the Imagine-1 study, which is more data in this fourth line plus setting, which will tell you more about efficacy, tell you more about safety.

I'm encouraging everybody to also look at the minimal, the measurable residual disease, the MRD data, which are really strong for the CAR-Ts. So I'm looking forward to the presentation at the ASH meeting where we're going to talk much more about that.

Moderator

And you remain comfortable that there is no neurotox on this molecule across trials?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yes, absolutely.

Moderator

Great. And this is a question I've sort of discussed with Merdad in the past as well. There's ICANS on this, but there's not neurotox. Those are separate things. Could there be any overlap between those two?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, that's a bit of an open question that people are debating. Obviously, neurotoxicity is a much broader category than just ICANS. And ICANS is the more severe described outcome. But at this point in time, we see really good tolerability.

Moderator

Really good tolerability. Okay. Okay, fantastic, and remind me again, what's the rate of ICANS on this molecule?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

We don't see it.

Moderator

Okay. There is no ICANS.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

There is very limited in the single percentage.

Moderator

Got it. ICANS and single-digit %. And would the risk of neurotox or ICANS be higher or not in an earlier line trial?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

I think the line of therapy doesn't make a big difference for this.

Moderator

Okay, got it. And the extent of steroid usage continues to remain high? Because I think one of the big differences versus some of the early cell therapy work was, even if it's grade 1 CRS, you allow steroid administration. So there's a lot of steroid usage upfront, which prevents sort of uncontrolled cell expansion. So is that a theme across the trials that grade 1 CRS and you can get steroid?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, exactly. So steroid use, I don't have the exact data on steroid use across the different studies at this point in time, but no change to what we've demonstrated before.

Moderator

Okay, got it. So Imagine-1, we get some updated data at ASH. I guess when do we see Imagine-3, which is earlier line? When would that readout be?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

That would be some time before you see those readouts.

Moderator

So we don't have an exact date for you at this point. But that's not a '26 event, or is?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

I don't think so.

Moderator

No, not a 2026.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

We've not communicated that exactly.

Moderator

Okay, and this is my last question, just as we start to wrap it up then, Dietmar. One thing I've been confused about is if one of the BCMA CAR-Ts hits in the first line setting versus transplant, don't they effectively become the standard care then at the transplant level, so then the ability to do another BCMA CAR-T just changes completely when that happens, no?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

So first of all, the outcomes for the CAR-Ts are, in my mind, better than the, and you distinguish between the autologous and the allogeneic transplant. We've seen cures with allogeneic transplant. We've not seen that with autologous transplant. With CAR-Ts, you do see long-term.

Moderator

Sorry, we see cures with?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

We do see cures with allogeneic transplant. We don't see cures with autologous transplant. But we do see cures with autologous CAR-Ts. That's a really important distinction. So you're right. If BCMA CAR-Ts move earlier, then I do think they will replace autologous transplants. Allogeneic transplant in younger patients is a different story, and again, I feel the.

Moderator

Oh, I see. So even within the transplant, you're saying, first of all, not everybody may get transplant.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah.

Moderator

So that remains eligible for BCMA CAR-Ts. Within transplant, you're saying allotransplant will remain happening anyway, so the BCMA remains eligible.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

The younger patients.

Moderator

It's really in the autologous setting is where maybe BCMA becomes standard care, and we can think about the penetration. Okay, this is very important.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

But then, if somebody comes, as we take BCMA CAR-Ts forward in earlier lines of therapy, yeah, of course, once you have an established standard of care, then you always need to compare to that established standard of care.

Moderator

Would you guys run a transplant trial or a first line trial?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

We are preparing for a first line trial. Yes, absolutely.

Moderator

Okay, got it. Last question on this. There's starting to be this perception that the street is moving on to beyond these current CAR-Ts to perhaps something more in vivo in nature and depending on the target. So if in vivo is what's next, how's Gilead positioned on that?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, we have actually, so we are getting into in vivo as well. Obviously, we would, as CAR-T is such an important business for the Kite part of our business, it's really important that we also have a leadership position in in vivo. In vivo basically means you give a viral vector or a non-viral vector, and you really stimulate the body to produce its own CAR-T cells. So it becomes a very natural extension of what we're doing. To be very clear, this is years out.

Moderator

But everybody's made investments now as if it was over.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

You have to make investments now, right? Because you need to secure the IP. You need to be a player in that area. You need to be a leader in that area.

Moderator

But I thought this ASH is about in vivo CAR-Ts, and not.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

It's an early, really interesting new technology. But it doesn't take away from the fact that patients need therapy now, and that's where the current CAR-Ts and then also anito-cel in myeloma and other approaches come in. But there is real promise. We've seen some early anecdotal data with really good efficacy. So what you do, you give the viral vector. Non-viral is even a few more years out, and we're working on both the viral vector-based and the non-viral. So we're trying to stay in the leadership position, both of those areas. With kind of the viral approaches, we have some anecdotal data that demonstrate, yes, CAR-Ts are formed, and yes, we see clinical responses. And we've communicated actually several acquisitions, more recently, the Interius acquisition, the PreGene collaboration, and some other acquisitions that basically position us well in this in vivo field also.

But as I said, we're focusing right now on CAR-Ts. They will play a role, and we're also preparing for a leadership position in the in vivo space.

Moderator

So Dietmar, what happens if a patient takes it, let's say 10 patients take it, seven of them develop CAR-Ts, three of them not really. What happens to those guys?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah, that's what we currently need to demonstrate. How many?

Moderator

Is this happening, by the way, that some patients just don't develop much cell therapy?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

When you look at the space more broadly, the data is very different. There are some approaches where people do apply the kind of viral vector, and then not everybody develops the CAR-Ts. If that is what people observe, then they need to go to different types of therapies.

Moderator

But this has been happening a little bit, you're saying?

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

With some of the approaches, yes. With other approaches, you see the CAR-T formation more reliably. So that is one characteristic where you have differentiation between the different approaches. And that's where we, for example, with the Interius approach, that's the licensing deal that we did, we feel quite encouraged by their early data.

Moderator

Got it. Okay, fantastic. Fantastic. Any questions from the audience? I know we went through a lot of different types of topics, from immunology to cell therapy to in vivo CAR-T to HIV treatment.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Which is the breadth of the portfolio?

Moderator

HIV prevention.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Yeah.

Moderator

All right, excellent. We'll wrap it up right here then. Thank you so much, Dietmar.

Dietmar Berger
Chief Medical Officer, Gilead Sciences, Inc.

Thank you.

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