Good morning, and welcome to Curis' Second Quarter 2025 Business Update Call. [Operator Instructions] Please be advised this call is being recorded today, Tuesday, August 5, 2025. I would now like to turn the conference over to Diantha Duvall, Curis' Chief Financial Officer. Diantha, please go ahead.

Thank you, and welcome to Curis' Second Quarter 2025 Business Update Call. Before we begin, I would like to encourage everyone to go to the Investor section of our website at www.curis.com to find our second quarter 2025 business update press release and related financial tables. I would also like to remind everyone that during the call, we will be making forward-looking statements, which are based on our current expectations and beliefs. These statements are subject to certain risks and uncertainties, and actual results may differ materially. For additional details, please see our SEC filings. Joining me on today's call are Jim Dentzer, President and Chief Executive Officer; Jonathan Zung, Chief Development Officer; and Dr. Ahmed Hamdy, Chief Medical Officer. We will also be available for a question-and-answer period at the end of our call. I'd now like to turn the call over to Jim.

Thank you, Diantha. Good morning, everyone, and welcome to Curis' second quarter business update call. We continue to make steady progress in our TakeAim Lymphoma study, which is evaluating emavusertib in combination with ibrutinib in patients with PCNSL. As a reminder, the TakeAim Lymphoma study is a single-arm study with an ORR endpoint that adds emavusertib to a patient's BTKi regimen after they have directly progressed on BTKi monotherapy. And after collaborative discussions with FDA and EMA, we expect the study to support accelerated submissions in both the U.S. and Europe. Over the next 12 to 18 months, we'll be focused on enrolling 30 to 40 additional patients that we'll need for the NDA and EMA submissions. In June, we attended both the ASCO and EHA conferences and had the opportunity to engage with a number of KOLs who remain excited and supportive about expanding emavusertib into additional indications in CLL and NHL. They were especially interested in exploring emavusertib's potential to fundamentally change the treatment paradigm for CLL and NHL patients currently treated with BTKi monotherapy. BTKi inhibitors became standard of care in CLL and NHL because they deliver a good overall response rate. But these patients on BTKi typically achieve partial responses, not complete remission. The unsurprising result is that patients who are treated with a BTK inhibitor end up having to stay on it in lifelong chronic treatment. And because they never achieve complete remission, many of these patients develop BTKi resistant mutations and ultimately progress. We're looking to improve current standard of care by adding emavusertib to a BTK inhibitor, enabling patients to achieve deeper responses and potentially come off treatment, reducing the risk of developing BTKi resistant mutations and improving a patient's quality of life. The first step in testing this hypothesis is to initiate…

Thank you, Jim. Curis reported a net loss of $8.6 million or $0.68 per share for the second quarter of 2025 compared to a net loss of $11.8 million or $2.03 per share for the same period in 2024. Research and development expenses were $7.5 million for the second quarter of 2025 as compared to $10.3 million for the same period in 2024. The decrease was primarily attributable to lower employee- related costs, research, consulting and clinical costs. Research and development expenses were $16 million for the 6 months ended June 30, 2025, as compared to $19.9 million for the same period in 2024. General and administrative expenses were $3.5 million for the second quarter of 2025 as compared to $4.8 million for the same period in 2024. The decrease was primarily attributable to lower employee-related and legal costs. General and administrative expenses were $7.5 million for the 6 months ended June 30, 2025, as compared to $9.7 million for the same period in 2024. In July, we completed a registered direct offering and concurrent private placement with net proceeds of approximately $6 million. Curis' cash and cash equivalents were $10.1 million as of June 30, 2025, and the company had approximately 10.7 million shares of common stock outstanding. Based upon our current operating plan, we believe that our $10.1 million of existing cash and cash equivalents as of June 30, together with the proceeds from the July 2025 offerings should enable us to fund our existing operations into the first quarter of 2026. With that, I'd like to open the call for questions. Operator?

[Operator Instructions] Our first question today comes from Li Watsek from Cantor.

I guess just a couple of questions here on -- for the BTK combination study in CLL. What do you think the bar will be? And also considering the evolving landscape in CLL with BTK degraders and next-gen BCL2 inhibitors, how do you think you can fit in? And then the second question is for AML triplet data coming later this year would be helpful if you can set the expectations for us.

Thank you, Li, for the question. Greatly appreciate it. Ahmed, you're probably the best to talk about the CLL study.

Sure. Well, I mean, with the BTK inhibitors, like Jim said, the overall responses is usually partial responses where patients can stay on the drug chronically lifelong, risking mutations, risking toxicities. We believe that adding emavusertib to a commercially available BTK inhibitor can lead to MRD-negative or complete remissions. And that would lead to a time-limited treatment, which is really the goal for CLL right now with unmet medical need. As far as degraders, they're still in development. It seems that there are some short- lived responses, none of which are approved yet, but we intend to combine with commercially available BTKi inhibitors. That answers your question, Li?

Yes. Let me add to that a little bit as well, Li. So I'll start where Ahmed left off on degraders. So whether you degrade or inhibit BTK, it doesn't really matter to us. I mean you're still blocking the BCR path. We block the other path, the Toll-Like Receptor path. So whatever method you use to knock down BTK is great, add this to it, it should make it better. The question about BCL2, I think, is fair. I mean there are a lot of indications or a lot of drugs being pursued in CLL because it's such a big indication. And I expect just as it is today, there's going to be room for a lot of different competitors. But we're feeling pretty confident that the standard of care today, which is BTKi, only gets better when you add ema to it, and it potentially has the ability to offer a safe and tolerable regimen that could enable people to go to a time-limited treatment. And we think that's pretty compelling. And obviously, the investigators do as well. Remains to be seen when we get the data, but at this point, I'd say we're pretty excited about it. On the AML triplet, Jonathan, Dr. Zung, maybe you could talk to that?

Yes. So our plans will be to present at the ASH meeting later this year, the efficacy and safety data that we see from the 7- and 14-day cohort.

Yes. And obviously, Li, the abstracts need to be accepted. But I think we're feeling pretty comfortable about our ability to present data at that conference. So I'll just leave it at that and look forward to talking about it at that time.

The next question comes from Sara Nik at H.C. Wainwright.

Just regarding your TakeAim Lymphoma study and your enrollment progression over the next 12 to 18 months. Just wondering if you could provide any color on how that enrollment is going in those next target 30 to 40 patients, if further sites needs to be open or kind of progressing as expected?

Sure. So it's going as we expected, which is it's steady, but it's an ultra-rare population. So as you know, we've got over 30 sites open. What we have said in the past, and we continue to say it is, our expectations is that we're going to be able to enroll 1 patient per clinical site per calendar year. So we'll call Sloan Kettering and ask them for one patient over the course of 2025. Now some sites can enroll more than that, some enroll less frequently. That happens with an ultra-rare indication, but that's why we've got more than 30 sites. So I'd say things are going as planned, and we're looking really forward to collecting those data and having a great discussion with FDA and EMA.

Our third question comes from Danya Ben-Hail at Jones.

Congrats on the progress. I have a few questions. The first one for PCNSL. What should we expect in the next data update, number of patients or mature data?

Yes. We haven't given guidance yet on what to expect in the next update other than obviously, the next natural conference would, of course, be ASH. But our guidance is going to be we're going to present the data we have at the time. So we continue to enroll. We continue to collect data, and we'll present what we have. And as I say, we're -- the data we've seen so far are pretty compelling. I hope the data moving forward would continue to show that case that we've got a clear drug that works in patients who are naive or patients who have failed prior BTK. So I'd say stay tuned.

Yes. And are you planning to open additional clinical sites?

I don't think we need to. I think right now, we're comfortable with the number of sites we have and the enrollment is on track. So we feel pretty good about it. Obviously, coming off the medical conferences, we're coming off of a lot of really great discussions and a lot of excitement among the KOLs. But I'd say at this point, there isn't a need to increase the number of sites to stay on track.

And last question for the CLL program. So are you planning -- what line of therapy would most -- are you planning to enroll? Are you suppose they will all be post BTKi?

Yes. Actually, Ahmed, do you want to talk to that?

Sure. Well, it can be any line of therapy provided that the patients are on a commercially available BTK inhibitor. So that can be in second line, can be patients who have been on a BTK and have not achieved a complete remission or MRD negative.

Yes. And just as a reminder, Danya, if you pull the label for ibrutinib or for that matter for acalabrutinib, you'll see the CR rate in those patients in their label is literally zero. Now at some point, I would say, of course, there are going to be a lot of studies out there, and there may be some patients who can get to CR. But the greater point is it's very rare. What we're hoping to be able to do is that we can replicate what we've seen in AML and in primary CNS lymphoma. And that is the drug combines well with other drugs. And because of its novel mechanism, we should be able to repeat what we've seen in PCNSL, and that is we can get complete responses. And as long as we can deepen the responses and offer the patients the ability to go to a time-limited treatment, I think we fundamentally change the way they can be treated, and it offers a really exciting alternative option for them.

Our next question comes from [ Anna Lee ] from Truist.

This is [ Anna ] on for Kripa. So 2 questions from us. Given the changes at the FDA, can you talk about if anything has impacted your plans in PCNSL for accelerated approval? And have you continued to have any discussions with the FDA? And the second question, in the context of the cash runway, any update on any BD efforts or anything like that? And any broader trends, particularly in oncology that might have a read-through to Curis?

Sure. Thank you, Anna. Appreciate the questions. Jonathan, would you like to talk to the FDA?

Sure, Jim. Anna, at this point, nothing has changed in terms of where we are with the agency. We conducted meetings with them last year, have alignment on key activities with them, and we're executing on that.

Yes. I would add to that. I'd just sort of echo the sentiment, Anna, that you're reading in all of the publications and all the papers. And that is it's -- the current era at FDA is a little concerning with its uncertainty. I think we take comfort that our lead beachhead indication in NHL happens to be in one in primary CNS lymphoma where there simply are no drugs approved. There is no standard. And we think that, that's a very encouraging fact pattern for us as we continue the discussions with FDA. Of course, the discussions in EMA, which were equally positive, I would say, that's obviously not affected by the current administration. But the overall tone, while I don't think it has much of an impact on Curis, it certainly has an impact on the biotech industry. And I would encourage everyone to be active in voicing their concerns about that. On the cash runway, Diantha, would you like to talk to that?

Yes. So I mean our cash runway goes into '26, as I previously mentioned, we're continually evaluating both dilutive and non-dilutive opportunities to extend our cash runway. So it's obviously something we'll be looking to do in the second half of this year to progress these programs as we've articulated today.

Our next question today comes from Yale Jen from Laidlaw & Company.

Congrats on the progress. My first question is in terms of the triplets. You mentioned the 7 days and 14 days completed. I remember the last time you guys also mentioned that you might have to do a 21 days dosing. I'm just curious whether that 21 days still holds or the 2-time point will be sufficient?

Well, I don't want to talk too much about the data that we have, of course, because we're hoping to be able to present this at ASH. I would say that I would expect that there are a number of different regimens that will get tried in the real-world setting, and we're going to want to be mindful of that and test those as fully as we can while we're in this clinical setting. So I'd say for now, we're very happy about where we are, and we look forward to discussing in more detail when the data are public. But in the meantime, as I say, I think you can just hear our optimism that having a drug that combines well with other drugs and has led to published responses in really challenging indications is very encouraging.

Okay. Great. That's very helpful. And just one follow-up question here, which is that you guys are talking about the CLL and that could be -- you may start enrolling patients to the end of the year. But you also guys have been talking a lot about the refractory AML. So I'm just curious at this point, how would you guys sort of prioritize the next development when you are getting PCNSL on its enrollment and what will be the next sort of priority at this time?

Yes. It's a terrific question, Yale. Thank you for asking. As you can imagine, it was kind of a high-class headache. We walked into ASCO and EHA with compelling data and walked out with designs for 5 separate trials. We certainly have more studies that we can run with a lot of enthusiasm from the community, then frankly, we can afford to. So we do have very active discussions internally about how we spend in as capital conscious a way and as capital efficient a way as we possibly can. It's not a surprise. Biotech has been in a tough financial environment for a long time. And I think the way we have been able to thread the needle over the last few years and make progress and generate compelling data despite the financial environment has been because of our discipline. And I think it's thanks to Diantha and frankly, the entire company. Everybody at this company is motivated to get this drug approved and to do it in the smartest, best and fastest way possible, and that is an ongoing effort.

Great. Maybe just squeeze one more here. You do have investigator-sponsored in solid tumor study, just in general, where things are and any updates?

Yes, we don't have an update on those now. Yes, as a reminder, and thank you, Yale, we have 5 separate ISTs that we talk about in our corporate presentation. Of course, because they're ISTs, the good news is that they're sponsored either by the NCI, NIH or academic partners, and therefore, they don't cost a whole lot for Curis. The downside with any investigator-sponsored trial or IST is, of course, we don't control the time line for when they're going to put data out. I am hopeful that at least one of those studies is going to have data to report out this year but we can't really commit to it because unfortunately, it's not under our control. So I love that emavusertib is being tried in all sorts of different areas, including 5 separate solid tumor types. And I love that it's very cost effective. But yes, I share your eagerness to see the data from those studies and look forward to hopefully being able to tell you later this year that we can do so.

Congrats on all the progress.

Thank you, Yale.

Our next question comes from Soumit Roy.

Congrats on all the progress. A question on the -- on PCNSL, the tirabrutinib data that came out at ASCO. I'm curious what's your take on it. One is the response rate and median DOR is pretty high, 64%, 9.2 months, but the PFS is sort of lower 3-ish months versus historic data, 5 months. Do you think that's an important drug to open up a second arm with AMR so that AMR remains relevant in PCNSL maybe 2 years from now if tirabrutinib gets a lot of traction?

So thank you, Soumit. First, thank you for the question. Yes, the tirabrutinib data certainly look very interesting, and we would expect at some point, it should get approval in the U.S. I mean it appears at the minimum it's the fifth BTK to the U.S. market. It appears to be like, like Acala, like zanubrutinib, like Pruto, it looks to be a next-generation BTK, which should offer at the minimum some safety advantage and maybe even an efficacy advantage. And when it does finally get approval, I think what we'd like to do is just as we would with any of the BTK inhibitors or for that matter, BTK degraders, establish that once you pick a method for blocking the BCR pathway, whether it's with tirabrutinib, ibrutinib, the degrader, pick your favorite method, add emavusertib to it, and it should make that efficacy better. That's our ultimate goal. So yes, we were very eager to see their data as well. We look forward to seeing them get approval eventually. And I would say, just as we look at zanu and Acala and Pruto, our goal would be eventually to be able to establish that emavusertib is the standard drug you add to a BTK regimen.

Is it a separate trial you're talking about where -- because currently, you are with ibrutinib and that's if the trial in those 30 patients gets in the label.

So tirabrutinib is not approved. So we can't test it with tirabrutinib. Because we can use any commercially available BTK inhibitor, but the lion's share of patients, I mean, all of our patients, except 2, I think, were on ibrutinib. I think we had one patient that had come from the tirabrutinib study and had progressed and then maybe one patient that was on Acala. But the vast majority of patients with PCNSL in the U.S. and in Europe, just as a factual matter, they're on ibrutinib today. Now we would expect, as I think you would agree, that if tirabrutinib is eventually successful and does get a first label in the U.S., it will be in PCNSL because that's the only study they're running. And I would hope at that point that we could get it added to the label. How we do that, whether we have to run some sort of supplemental study to show that it works as well with any BTK inhibitor, including tirabrutinib, that's a discussion we'll have to have with the FDA once tirabrutinib is approved. But I would certainly expect long term that, that is likely to be the fifth. Merck has one that will likely be the sixth approved. And we're just going to be able to combine with all of them is my goal.

One question on the triplet AML frontline. So you already completed the 7-day safety. And then at ASH, I guess we are expecting the 14- and 21-day safety data. Are these patients -- do we have to reenroll these patients into the efficacy readout or?

Yes, I want to be really careful about what I say about the data, frankly, because I said we're planning on submitting it and presenting it at ASH. So I apologize if it seems a little cagey, but all I would say is we're really excited to talk about the potential for a triplet combination in the frontline setting. I think certainly, azacitidine and venetoclax in AML are standard of care. And I'm just excited to talk about the data that we have that could highlight a potential place for emavusertib as well, but that's going to have to wait until we make the data public.

Right. So I'm thinking like the next safety -- next readout is going to be for 14- and 21-day safety only. Are you able to enroll these same patients into the efficacy arm? Or you have to find new patients to just to understand how easy would be -- or how quick would be the next round of enrollment?

Yes. As I said, I want to be really careful about what we're going to present and what it looks like until we can actually talk to it. Let's wait and see whether the abstracts get accepted and whether we've got -- what kind of presentation we've got before I talk too much about that, if that's all right?

Yes. Totally understandable.

There are no further questions at this time. I will now turn the call over to Jim Dentzer, President and CEO. Please continue.

Thank you, operator. And thank you, everyone, for joining today's call. And as always, thank you to the patients and families participating in our clinical trials, to our team at Curis for their hard work and commitment and to our partners at Aurigene, the NCI and the academic community for their ongoing collaboration and support. We look forward to updating you again soon. Operator?

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